A battery box, a battery, and a vehicle is disclosed. In the design of the battery box, a bearing member is arranged between two adjacent longitudinal beams. With the support of the longitudinal beams, this allows for stable accommodation of battery cells between the bearing member and the cover. The longitudinal beams are connected to the vehicle body and extended along the length direction of the vehicle. In this way, the longitudinal beams of the present application not only serve as the supporting structure of the battery box, but can also directly serve as the supporting structure of the vehicle. By integrating the beam structure of the vehicle into the battery box to form an integrated design, the installation space for the battery in the vehicle is expanded.
B60K 1/04 - Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
H01M 50/24 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
H01M 50/249 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders specially adapted for aircraft or vehicles, e.g. cars or trains
H01M 50/271 - Lids or covers for the racks or secondary casings
A welding fixture and a welding device, which fall within the technical field of battery production are disclosed. The welding fixture comprises a base, a frame positioning mechanism and a negative pressure suction mechanism, the base comprising a placement region in which a frame is placed, the frame positioning mechanism being arranged on the base and configured to position the frame, and the negative pressure suction mechanism being arranged in the placement region and configured to generate negative pressure to suck a covering member so as to press the covering member against the frame. The welding fixture according to the present application can reduce the risk of damage to the covering member, increase the yield of cases, and reduce the production cost.
B23K 37/04 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
3.
ENERGY SCHEDULING POLICY DETERMINATION METHOD AND APPARATUS, ELECTRONIC DEVICE, AND STORAGE MEDIUM
The present application is applicable to the technical field of energy scheduling, and provides an energy scheduling policy determination method and apparatus, an electronic device, and a storage medium. The method comprises: acquiring the load power information of a power consuming device and the generation power information of a power generating device; and on the basis of the load power information of the power consuming device and the generation power information of the power generating device, solving for an optimal solution of a linear scheduling model to obtain a target scheduling policy, wherein the target scheduling policy is charging and discharging power corresponding to an energy storage device within each scheduling time period, an objective function and a constraint condition of the linear scheduling model are both linear functions, and in the objective function, the charging and discharging power of the energy storage device is represented by a single variable. The charging and discharging power of the energy storage device is used as the single variable of the objective function, so as to convert the determination problem of an energy scheduling policy into a linear programming problem, and the linear programming problem is solved so as to obtain the energy scheduling policy, thereby reducing the complexity of energy scheduling solving, and preventing the solution of the linear scheduling model from being locally optimal.
A battery cell (5), a battery and an electric apparatus. The battery cell (5) comprises a negative electrode sheet and a separator, wherein the separator comprises a porous substrate and a coating arranged on at least one surface of the porous substrate, the coating comprising nanocellulose and a granular filler; and the width of the separator is denote as A, the width of the negative electrode sheet is denoted as B, both are in units of mm, and 0
H01M 50/454 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising a non-fibrous layer and a fibrous layer superimposed on one another
H01M 50/449 - Separators, membranes or diaphragms characterised by the material having a layered structure
H01M 50/457 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
H01M 50/463 - Separators, membranes or diaphragms characterised by their shape
Provided in the present disclosure are a secondary battery and an electric device. The secondary battery comprises: a negative electrode sheet, wherein the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer formed on at least one surface of the negative electrode current collector; the negative electrode film layer has a first surface away from the negative electrode current collector and a second surface arranged opposite the first surface; the thickness of the negative electrode film layer is denoted as H; a region within a thickness range from the second surface of the negative electrode film layer to 0.3H is denoted as a first region of the negative electrode film layer; a region within a thickness range from the first surface of the negative electrode film layer to 0.3H is denoted as a second region of the negative electrode film layer; the first region comprises a first binder, the first binder being a linear binder; and the second region comprises a second binder, the second binder being a dot-like binder. The secondary battery can reduce the cold-press rebound rate and cyclic expansion rate of an electrode sheet, thereby improving the cycling stability of the battery.
The present application relates to a ternary precursor and a preparation method therefor, a secondary battery, and an electric device. The ternary precursor comprises an inner core and a shell layer coating the surface of the inner core; the inner core comprises a sacrificial template material; the sacrificial template material comprises a first modification element; and the shell layer comprises a precursor material of a ternary material. The ternary precursor can effectively improve the cycle performance of the ternary material.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A tab (70) inspection system and method, which are used for inspecting a tab (70) in a battery cell obtained by means of cell integration processing. The battery cell comprises a battery cell body (50), the tab (70) and a cover plate (60), wherein the tab (70) is arranged between the cover plate (60) and the battery cell body (50). The tab inspection system comprises: a distance expansion apparatus (10), a light source (20), a photographic apparatus (30) and an upper computer (40), wherein the distance expansion apparatus (10) is used for expanding the distance between the battery cell body (50) and the cover plate (60), so as to expose a side face of the tab (70); the light source (20) is used for lighting the side face of the tab (70); the photographic apparatus (30) is used for acquiring a first scanning image which contains the side face of the tab (70); and the upper computer (40) is used for determining, on the basis of the first scanning image, whether the side face of the tab (70) is fractured. After a battery cell has been subjected to cell integration processing, the distance expansion apparatus (10) can be used to expand the distance between the battery cell body (50) and the cover plate (60), so as to expose the side face of the tab (70), such that an inspection for the tab (70) is realized, thereby improving the safety of the battery cell.
An apparatus and a method for manufacturing an electrode plate of a battery cell. The apparatus comprises: a tab die-cutting unit; a first visual detection unit for a first surface side of the electrode plate; an electrode plate cutting unit; a second visual detection unit for a second surface side of the electrode plate opposite to the first surface side; a first deviation rectification unit located upstream of the electrode plate cutting unit; and a second deviation rectification unit located downstream of the electrode plate cutting unit.
Disclosed in the present disclosure are a battery assembling system and a control method therefor, and a battery production line, which relates to the technical field of batteries. The battery assembling system can reduce the risk of congestion during tray return and facilitate the miniaturization of the battery assembling system. The battery assembling system comprises a stacking platform, an assembling device, an assembling transfer line, and a return device, wherein the stacking platform is used for storing trays and battery modules located in the trays; one end of the assembling device is connected to one end of the stacking platform by means of the assembling transfer line, the assembling device is used for assembling the battery modules to be assembled, and the assembling transfer line is used for transporting the trays carrying the battery modules to be assembled to the assembling device; and the other end of the assembling device is connected to the other end of the stacking platform by means of the return device, and the return device is used for transporting the trays carrying the assembled battery modules to the stacking platform.
An electrode sheet coating deviation correction method and system. The method comprises: acquiring coating images obtained by means of performing collection on two opposite coating surfaces of an electrode sheet; using the coating images to determine coating misalignment information, wherein the coating misalignment information represents misalignment states of coating areas on the coating surfaces, the coating misalignment information comprises first misalignment information, and the first misalignment information represents the state of misalignment between a coating area on a coating surface and a standard coating position in the coating surface; and on the basis of the coating misalignment information, performing deviation correction on at least two of coating mechanisms for the two coating surfaces and the electrode sheet, such that, after deviation correction, the coating areas on the two coating surfaces are aligned and are both located at standard coating positions in the coating surfaces.
B05C 13/02 - Means for manipulating or holding work, e.g. for separate articles for particular articles
B65H 23/032 - Controlling transverse register of web
B05C 11/10 - Storage, supply or control of liquid or other fluent materialRecovery of excess liquid or other fluent material
B05C 9/14 - Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by groups , or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating
B05C 9/04 - Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by groups , or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
11.
GRAPHITE NEGATIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, SECONDARY BATTERY CONTAINING SAME AND ELECTRIC DEVICE
Provided are a graphite negative electrode active material and a preparation method therefor, a secondary battery containing same and an electric device. The powder compaction density of the graphite negative electrode active material under a pressure of 49,000 N is greater than or equal to 1.60 g/cm3, and the ratio Id/Ig of the peak intensity Id at 1250 cm-1to 1500 cm-1and the peak intensity Ig at 1500 cm-1to 1650 cm-1 in the Raman spectrum of the graphite negative electrode active material is greater than or equal to 0.15. The graphite negative electrode active material can take both the energy density and rate capability of a battery into consideration.
The present application discloses a battery cell, a battery, and an electric device. The battery cell comprises a casing and a one-way valve; the casing is provided with a wall portion; the one-way valve comprises a valve body and a valve core; the valve body is arranged on the outer surface of the wall portion, and at least part of the valve body protrudes out of the outer surface of the wall portion; a valve cavity is formed inside the valve body, and the valve core is arranged in the valve cavity; and the valve core is used for plugging a gas inlet of the valve cavity, and the valve core is configured to open the gas inlet under the action of gas inside the casing and release the gas inside the battery cell. By means of such an arrangement, the gas inside the casing can be discharged out of the casing in a timely manner, so that the gas pressure inside the casing is not excessively high, thereby reducing the risk that a pressure relief mechanism opens the valve in advance, and greatly prolonging the service life of the battery cell.
The present application discloses a battery cell, a battery, and an electric device. The battery cell comprises a casing and a gas permeable membrane assembly; the casing has a wall part, the wall part is provided with a first exhaust hole, and the first exhaust hole makes the interior of the casing and the exterior of the casing communicated; the gas permeable membrane assembly is arranged on the wall part, the gas permeable membrane assembly comprises a gas permeable membrane, and the gas permeable membrane assembly covers the first exhaust hole. In the present application, on the basis of the arrangement, gas inside the battery cell in a sealed state can be discharged through the gas permeable membrane, and gas inside the battery casing is discharged out of the casing in time, thus preventing the air pressure in the battery casing from being too high, reducing the risk that a pressure relief mechanism opens a valve in advance, and greatly prolonging the service life of the battery.
Disclosed in the present application are an electrode sheet marking system and method. The electrode sheet marking system comprises an image acquisition apparatus and a processing apparatus, wherein the image acquisition apparatus is used for acquiring an electrode sheet roll in an unwinding process, so as to obtain a current image frame; the processing apparatus is in communication connection with the image acquisition apparatus, and is used for performing detection on the current image frame, and determining, when it is detected that there is a positioning mark in the current image frame, a marking moment for a target electrode sheet on the basis of an acquisition moment for a reference image frame corresponding to the current image frame; the target electrode sheet is an electrode sheet which can be distinguished by means of the detected positioning mark; and the marking moment is a moment at which a marking apparatus is triggered to mark the target electrode sheet. The above solution can realize the marking of an electrode sheet roll that has been provided with a positioning mark.
Provided in the present application are a hinge structure, a power storage cabinet and a power storage device. The hinge structure (30) comprises two connection structures (32) and a rotating shaft (31), wherein the rotating shaft (31) rotationally connects the two connection structures (32). At least one connection structure (32) comprises an adjustment mechanism (33), wherein the adjustment mechanism (33) comprises a first component (331) and a second component (332), the first components (331) being connected to the rotating shaft (31), and the second component (331) being movably connected to the first component (331) in a direction perpendicular to the axial direction of the rotating shaft (31). By means of applying the hinge structure (30) to a sealed cabinet, before a cabinet door (20) rotates relative to a cabinet body (10), the adjustment mechanism (33) enables the cabinet door (20) to move away from the cabinet body (10), thereby reducing compression on sealing strips (42).
The present disclosure relates to the technical field of batteries. Disclosed are a battery cell, a battery, an electric device and an energy storage device. The battery cell comprises a housing, a cell core and a ventilation assembly. The housing is provided with an accommodating cavity, and comprises a first wall, and a first gas discharge channel is provided in the first wall. The cell core is arranged in the accommodating cavity. The ventilation assembly is mounted on the first wall and covers the first gas discharge channel, and the ventilation assembly comprises a connector and a ventilation film. At least one through hole is provided in the connector, and the ventilation film completely covers the through hole(s).
The present application provides a battery cell and a preparation method therefor, a battery, and an electric device. The battery cell comprises: an electrode assembly and an outer package, the electrode assembly comprises a positive electrode sheet, a positive electrode active material layer is provided on the positive electrode sheet, and the positive active material layer comprises a transition metal oxide; the outer package is used for packaging the electrode assembly, a venting device is arranged on the outer package, and the venting device comprises a breathable membrane. The venting device is mounted on the outer package of the battery cell, and excess gas generated due to the instability of transition metals during use of the battery cell is discharged out of the battery cell in time by means of the breathable membrane of the venting device, so that the explosion-proof valve of the battery cell is not prone to abnormal valve opening due to excessively large internal air pressure, improving the reliability of the battery and prolonging the service life thereof.
A battery cell (20), a battery (100), an electric device and an energy storage cabinet, relating to the technical field of batteries. The battery cell (20) comprises a casing (21), a first electrode terminal (22), a first current collecting member (23) and a plurality of electrode assemblies (24). The casing (21) is provided with a wall portion (211). The first electrode terminal (22) is mounted to the wall portion (211). The plurality of electrode assemblies (24) are accommodated in the casing (21), and the plurality of electrode assemblies (24) are stacked in a first direction; each electrode assembly (24) comprises a main body part (241) and a first tab (242), wherein in a second direction, the first tab (242) is arranged at one end of the main body part (241); the first tabs (242) of the plurality of electrode assemblies (24) are located at the same ends of the main body parts (241); and the second direction intersects with the first direction. The first current collecting member (23) is electrically connected to the first electrode terminal (22) and each first tab (242). Therefore, a plurality of first current collecting members (23) do not need to be provided in the casing (21) to be connected to the first tabs (242) of the plurality of electrode assemblies (24), and the thickness or size of a single electrode assembly (24) does not need to be increased, thereby effectively reducing the manufacturing difficulty of the electrode assemblies (24), and thus reducing the manufacturing difficulty of the large-capacity battery cell (20).
H01M 50/531 - Electrode connections inside a battery casing
H01M 50/258 - Modular batteriesCasings provided with means for assembling
H01M 50/242 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
H01M 50/172 - Arrangements of electric connectors penetrating the casing
20.
DIGITAL TWIN CONSTRUCTION METHOD FOR ENERGY STORAGE VALVE GRID-CONNECTED SYSTEM, AND RELATED APPARATUS
The present application relates to the technical field of power systems, and discloses a digital twin construction method for an energy storage valve grid-connected system, and a related apparatus. The digital twin construction method for an energy storage valve grid-connected system comprises: acquiring system data and an operation state of an energy storage valve grid-connected system, wherein the system data comprises data information of each element in the energy storage valve grid-connected system; acquiring a data file of a real time digital simulator simulation model corresponding to the energy storage valve grid-connected system; establishing a relational data table between the system data and each element in the data file; updating the data file on the basis of the relational data table to import the system data into the real time digital simulator simulation model; and sending the operation state to the real time digital simulator simulation model to obtain the real time digital simulator simulation model serving as a digital twin of the energy storage valve grid-connected system. Thus, the actual state of an energy storage valve grid-connected system can be simulated in real time, and the actual state of the energy storage valve grid-connected system can be sensed in real time.
The present application discloses an insulating boot mounting system and a usage method therefor, and a battery pack production method. The insulating boot mounting system comprises a frame, a feeding assembly, tearing assemblies, positioning assemblies, a driving assembly, and a control module; the feeding assembly is provided with a discharging position used for placing an insulating boot; the driving assembly comprises conveying mechanisms, a moving mechanism, and suction mechanisms; each conveying mechanism is used for conveying a battery to an adhering station; the moving mechanism is used for suctioning the insulating boot at the discharging position to the corresponding tearing assembly; the tearing assembly is used for cooperating with the moving mechanism to tear off release paper on the insulating boot; the moving mechanism is used for suctioning to the corresponding positioning assembly the insulating boot on which the release paper is torn off; and each suction mechanism is used for suctioning to the adhering station the insulating boot on the positioning assembly so as to attach the insulating boot to the battery located at the adhering station. The technical solution of the present application can improve the mounting efficiency of insulating boots.
An electrode sheet slitting system (1000), comprising: an electrode sheet cutting device (200) used for slitting a first electrode sheet (110) to form a plurality of second electrode sheets (120), wherein the width of the first electrode sheet (110) is greater than the width of each second electrode sheet (120); an information acquisition module (300) used for acquiring information of the second electrode sheets (120); and a processor (700) used for obtaining the information and determining, according to the information, whether a deviation occurs in the second electrode sheets (120), wherein in the event of a deviation, the processor (700) performs deviation correction on the first electrode sheet (110). Also provided is an electrode sheet slitting method. The electrode sheet slitting system (1000) and method reduce the batch scrap of electrode sheets and the flow of defective electrode sheets into subsequent production processes.
B23P 23/06 - Metal-working plant comprising a number of associated machines or apparatus
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
23.
SECONDARY BATTERY AND ELECTRIC DEVICE COMPRISING SAME
The present invention provides a negative electrode sheet, a secondary battery, and an electric device comprising same. The negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer formed on at least one surface of the negative electrode current collector; the negative electrode film layer has a first surface distant from the negative electrode current collector and a second surface opposite to the first surface; the thickness of the negative electrode film layer is denoted as H; a region within the thickness range from the first surface to 0.3H of the negative electrode film layer is denoted as a first region of the negative electrode film layer; a region within the thickness range from the second surface to 0.3H of the negative electrode film layer is denoted as a second region of the negative electrode film layer; and the content of a binder of the first region is less than the content of a binder of the second region. The secondary battery prepared from the negative electrode sheet has good cycle performance and dynamic performance.
Provided in the present disclosure are a secondary battery and an electric apparatus containing same. The secondary battery comprises a negative electrode sheet, wherein the negative electrode sheet comprises a negative current collector and a negative film layer, which is arranged on at least one surface of the current collector and comprises a negative active material and a conductive agent, the powder conductivity σ of the negative active material is greater than or equal to 80 S/cm but less than or equal to 106 S/cm, and the compaction density of the negative film layer is 1.35 g/cm3to 1.50 g/cm3. The negative electrode sheet is conducive to alleviating a black-spot phenomenon of a secondary battery and improving the cycle performance and dynamic performance of the secondary battery.
D/GDGD/GDD represents the D peak intensity of a Raman spectrum at 1350±100 cm-1GG represents the G peak intensity of the Raman spectrum at 1580±100 cm-1.
Disclosed in the present application are an electrode sheet inspection method and system. The method comprises: acquiring an image to be subjected to inspection, which is collected from an electrode sheet; on the basis of preset edge-capture region information, determining at least one edge-capture region from said image, wherein the preset edge-capture region information comprises position information and/or size information of the edge-capture region; performing boundary detection on each edge-capture region, so as to obtain a first boundary line in each edge-capture region, wherein the first boundary line is used for delineating different partitions of the electrode sheet that are arranged in a widthwise direction; and using the first boundary line in each edge-capture region to determine width information related to the electrode sheet. In this way, the present application can implement automatic inspection for an electrode sheet.
Embodiments of the present application relate to the technical field of batteries, and provide a battery cell, a battery, an electric device, and an energy storage apparatus. The battery cell comprises a casing and an electrode assembly, the electrode assembly is accommodated in the casing, the volume of the casing is V, the capacity of the battery cell is C, and the volume of the casing and the capacity of the battery cell satisfy: 1.4 dm3≤V≤65 dm3, and 400 Ah≤C≤5000 Ah. Therefore, the situation that the battery cell has a too small volume and a too high capacity is avoided, so that the manufacturing cost of a high-capacity battery cell is reduced, achieving better economy; and the situation that the battery cell has a too large volume and a too low capacity is avoided, so that the volume energy density of the high-capacity battery cell is improved, thus taking both the economy and energy density requirements of the battery cell into account.
A battery top cover, a battery, and an electrical apparatus are disclosed. The battery top cover has a flow channel area and a non-flow channel area, the flow channel area is used to accommodate a fluid for adjusting the temperature of a battery cell, and the non-flow channel area is structured not to accommodate a fluid; the battery top cover comprises: a first heat exchange member; and a second heat exchange member comprising a first heat exchange sub-member and a second heat exchange sub-member connected to each other, the first heat exchange sub-member being recessed relative to the second heat exchange sub-member in a direction facing away from the first heat exchange member, the flow channel area being formed between the first heat exchange sub-member and the first heat exchange member, and the non-flow channel area being formed between the second heat exchange sub-member and the first heat exchange member.
The present application belongs to the technical field of defect detection. Disclosed are a defect detection method and system. The present application involves: acquiring battery cell images which are collected at a plurality of angles, wherein each battery cell image comprises a tab portion of a battery cell; by means of a target detection model, performing tab defect detection on said battery cell images, so as to obtain a tab detection result, wherein the target detection model is used for performing tab positioning and tab defect identification; and completing defect detection by means of the tab detection result. By means of a target detection model, tab defect detection is performed on battery cell images which are collected at a plurality of angles, such that a defect in a tab portion can be accurately detected; and compared with manual identification for a tab defect, the present application improves the efficiency and precision of tab defect detection, and increases the rate of identification for a minor tab defect.
A graphite negative electrode active material and a preparation method therefor, a secondary battery, and an electric device. The degree of graphitization of the graphite negative electrode active material is 88%-93%, and the oil absorption value of the graphite negative electrode active material does not exceed 50 ml/100 g. The graphite negative electrode active material can improve the cycling performance of the battery and prolong the service life of the battery.
The present disclosure provides a secondary battery and an electrical apparatus. The secondary battery comprises a negative electrode sheet; the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer formed on at least one surface of the negative electrode current collector; the negative electrode film layer comprises a graphite material, and the tap density of the graphite material is 1.2 g/cm3-1.4 g/cm3; the difference value between the compaction density of the negative electrode film layer and the tap density of the graphite material is not less than 0.15 g/cm3.
A graphite negative electrode active material and a preparation method therefor, a secondary battery containing same, and an electric device. The volume distribution particle size Dv1 of the graphite negative electrode active material is 1.5 μm-3 μm, and the graphite negative electrode active material comprises primary particle morphology. The graphite negative electrode active material can improve the cycling performance of the battery and prolong the service life of the battery.
A carbon-based negative electrode active material, a preparation method, a secondary battery and an electric device. The gram volume of the carbon-based negative electrode active material is 345-355 mAh/g, and the powder compaction density under the pressure of 20,000 N is greater than 1.55 g/cm3and less than 1.65 g/cm3. The secondary battery prepared from the carbon-based negative electrode active material has both good cycle performance and high energy density.
A graphite negative electrode active material and a preparation method therefor, a negative electrode sheet containing same, a secondary battery, and an electric device. A particle body of the graphite negative electrode active material comprises an internal area and a surface-layer area at least partially surrounding the internal area; the surface-layer area refers to an area formed by extending from the surface of the particle body of the graphite negative electrode active material to the interior of a particle by a distance of 30 nm; the mass percentage of crystalline carbon in the internal area is denoted as η1; the mass percentage of crystalline carbon in the surface-layer area is denoted as η2; and 10%≤η1-η2≤35%. The graphite negative electrode active material can improve the cycle performance of a battery.
A secondary battery and an electric device. The secondary battery comprises a negative electrode sheet; the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer provided on at least one surface of the negative electrode current collector; the negative electrode film layer comprises a negative electrode active material and a conductive agent; the negative electrode active material comprises a graphite material; the tap density of the graphite material is greater than or equal to 1.2 g/cm3; and on the basis of the total mass of the negative electrode film layer, the mass fraction of the conductive agent is greater than or equal to 1.6%. The cycle stability of the secondary battery is further improved.
A graphite negative electrode active material and a preparation method therefor, a negative electrode plate, a secondary battery, and an electrical apparatus. A particle body of the graphite negative electrode active material comprises an interior area and a surface layer area at least partially surrounding the interior area, the surface layer area referring to an area formed extending a distance of 30 nm from the surface of the particle body of the graphite negative electrode active material toward the interior, and the surface layer area comprising a disordered layer. The graphite negative electrode active material can balance the dynamic performance and the cycling stability of a battery.
The present application discloses a battery cell, a battery, and an electrical device. The battery cell comprises a casing and a gas discharge assembly; the casing is provided with a wall portion; the gas discharge assembly is arranged on the wall portion and comprises a one-way valve and a gas-permeable film assembly; the gas discharge assembly is used for discharging gas inside the casing. By means of the arrangement, the gas inside the casing can be discharged out of the casing in time, so that the gas pressure of the interior of the casing is not too high, thereby reducing the risk that the valve of a pressure relief mechanism is opened in advance, and greatly prolonging the service life of the battery cell.
The present application relates to the technical field of batteries, and provides a battery cell, a battery, an electric device, and an energy storage cabinet. The battery cell comprises a casing, a plurality of electrode assemblies, and a plurality of electrode terminals. The casing is provided with a wall portion. The plurality of electrode assemblies are accommodated in the casing and are arranged in a first direction, each electrode assembly comprises a main body assembly and two tab groups, the two tab groups are spaced apart in the first direction on one side of the main body assembly in a second direction, and the two tab groups have opposite polarities. The plurality of electrode terminals are mounted on the wall portion and are spaced apart in the first direction. In the first direction, two tab groups close to each other in two adjacent electrode assemblies have the same polarity and are both electrically connected to one electrode terminal, and two tab groups farthest from each other in the plurality of electrode assemblies are respectively electrically connected to two electrode terminals. Thus, electrode terminals arranged on the casing can be reduced, and the production takt of the battery cell can be optimized, so that the production efficiency of the battery cell can be improved, and the manufacturing cost of the battery cell can be reduced.
The present application relates to the technical field of battery production, and discloses a flipping device and a use method therefor, and a flipping method for a battery module. The flipping device comprises a device frame, a raising/lowering mechanism, a flipping mechanism, a first clamping mechanism and a second clamping mechanism; at least part of the device frame is configured to be provided beside a conveying line; the raising/lowering mechanism can be raised and lowered relative to the device frame, and the flipping mechanism is rotatably connected to the raising/lowering mechanism; the first clamping mechanism is provided on the flipping mechanism, and the first clamping mechanism is configured to clamp a first bearing member; the second clamping mechanism is provided on the flipping mechanism, the second clamping mechanism is configured to clamp a battery module, and the second clamping mechanism is configured to release the clamping of the battery module independently of the first clamping mechanism. The second clamping mechanism is configured to release the clamping of a battery module independently of the first clamping mechanism, so that the first bearing member can be flipped and reset while conveying the battery module and a second bearing member by means of the conveying line, thereby improving the flipping efficiency.
B65G 47/248 - Devices influencing the relative position or the attitude of articles during transit by conveyors orientating the articles by turning over or inverting them
B65G 47/90 - Devices for picking-up and depositing articles or materials
40.
BATTERY CELL, BATTERY, ELECTRICAL DEVICE AND ENERGY STORAGE APPARATUS
A battery cell (10), a battery (100), an electrical device, and an energy storage apparatus. The battery cell (10) comprises a housing (1), a separation apparatus (7) and multiple electrode assemblies (2). The housing (1) is provided with an accommodating space (13), the multiple electrode assemblies (2) being accommodated in the accommodating space (13), and the separation apparatus (7) being disposed in the accommodating space (13), the separation apparatus (7) is configured to divide the accommodating space (13) into multiple sub-spaces (131), each sub-space (131) accommodating at least one electrode assembly (2). The separation apparatus (7) provides a separation function for the electrode assemblies (2) in each sub-space (131), so as to reduce the accumulation of expansion stress of electrode assemblies (2) in adjacent sub-spaces (131), thereby reducing the risk of the electrode assemblies (2) compressing and deforming each other, and effectively improving the reliability of a battery cell (10).
The present application provides a battery and an electric device. The battery comprises a case body and battery cells; vent holes passing through the case body in the thickness direction of the case body are formed on the case body, and the battery cells are accommodated in the case body. Each battery cell comprises a casing, and a first pressure relief mechanism and two electrodes arranged on the casing, the first pressure relief mechanism is communicated with the vent holes and the interior of the casing in an open state, and at least one of the two electrodes and the first pressure relief mechanism are arranged on the same side of the casing. The vent holes pass through the case body in the thickness direction of the case body, the first pressure relief mechanism is communicated with the vent holes and the interior of the casing in the open state, gas discharged from the first pressure relief mechanism is discharged out of the case body through the vent holes, and the gas is cooled and depressurized by means of the outside space of the case body, so that the risk of gas detonation inside the case body is reduced or eliminated, improving the safety performance of the battery.
Provided in the present disclosure are a secondary battery and an electric apparatus. The secondary battery comprises a negative electrode sheet, wherein the negative electrode sheet comprises a negative current collector and a negative film layer, which is arranged on at least one surface of the negative current collector, the negative film layer comprises a negative active material, the compaction density of the negative film layer is greater than or equal to 1.45 g/cm3, the liquid absorption speed of the negative active material is 30 ml/100g to 60 ml/100g, and the tortuosity of the negative electrode sheet is less than or equal to 6. The secondary battery in the present disclosure has a relatively high energy density while having excellent cycle performance.
A lithium secondary battery, a preparation method therefor, and an electrical apparatus. The lithium secondary battery comprises an electrolyte solution, the electrolyte solution comprising a first solvent, a first additive, and a second additive, and the first solvent comprising a carboxylic ester compound. The reduction potential of the carboxylic ester compound relative to Li+/Li is less than or equal to 1.4 V, the reduction potential of the first additive relative to Li+/Li is greater than or equal to 1.4 V, and the reduction potential of the second additive relative to Li+/Li is greater than or equal to 1.0 V and less than 1.4 V. According to the lithium secondary battery, the stability and compactness of an SEI film are improved by means of improving an electrolyte solution, thereby reducing the degree of gas production during cycling and storage of lithium secondary battery and comprehensively improving the performance of the lithium secondary battery.
A battery self-discharge testing method, system and apparatus. According to the method, during determination of a voltage drop of a battery, the battery is connected in parallel to an external resistor with specific resistance for a certain duration, and then self-discharge testing of the battery is completed on the basis of a voltage drop result after the parallel connection. Therefore, the effect of accelerating a battery discharge process by reducing the parallel connection resistance of a circuit, so as to shorten a battery voltage drop acquisition duration is achieved. Therefore, the problem in the related art of long battery self-discharge testing time caused by a battery needing to undergo long time standing to achieve the measurement of a reliable voltage drop when the battery has a large capacity or a testing instrument has a low precision standard is alleviated.
Disclosed in the present application are a battery cell, a battery and an electrical device. The battery cell comprises a casing and an exhaust component, the casing being provided with a wall part and an accommodation chamber, the exhaust component being arranged on the wall part, and the exhaust component being used for discharging gas in the casing. The battery cell further comprises an electrolyte, and the electrolyte is filled in the accommodation chamber. The conductivity of the electrolyte is 2 ms/cm≤conductivity≤16 ms/cm, and the exhaust rate of the exhaust component is 0.6 mL/day≤exhaust rate≤10.0 mL/day. By matching battery cells having electrolytes of different conductivities with exhaust components of different exhaust rates, the solution of the present application can balance the contradiction between high conductivity requirements and high gas production amounts, and reduces the impact of external water vapor intrusion on batteries in the exhaust process.
The present application relates to a watchdog circuit and an electronic power device. During actual operation, a voltage divider circuit can input a reference voltage into a first input end of a first comparator; on the basis of the input state of a dog feeder circuit, the dog feeder circuit itself adjusts the charging-discharging state of a charging-discharging circuit with respect to a second input end of the first comparator, so as to change the input voltage of the second input end of the first comparator; and finally, the first comparator performs comparative analysis on the basis of the reference voltage and the input voltage, and feeds back a corresponding level signal, implementing monitoring and restart control of an object to be monitored accessed by an output end of the first comparator.
G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance
H03K 5/24 - Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
47.
SUPPORT DEVICE, STACKED STRUCTURE, AND ENERGY STORAGE VALVE TOWER
A support device (100), a stacked structure (1000), and an energy storage valve tower (2000). A first sliding portion (11) and a rolling support portion (12) are arranged on a connector (10) of the support device (100), and a sliding member (20) is supported on the first sliding portion (11) and the rolling support portion (12), the first sliding portion (11) being in sliding fit with the sliding member (20). The projection of the sliding travel of the sliding member (20) in a horizontal direction at least partially exceeds the projection range of a shielding structure (300) in the horizontal direction. In the support device (100) provided in the present solution, the sliding member (20) can bear an external structure (200) having a relatively heavy weight, so as to perform auxiliary movement, and the sliding member (20) can drive at least part of the external structure (200) to move beyond the projection range of the shielding structure (300) in the horizontal direction, thereby enabling a lifting operation of the external structure (200).
B66C 1/10 - Load-engaging elements or devices attached to lifting, lowering, or hauling gear of cranes, or adapted for connection therewith for transmitting forces to articles or groups of articles by mechanical means
48.
MAINTENANCE TOOLING AND MAINTENANCE TOOLING ASSEMBLY
A maintenance tooling (100), comprising a tooling body (10) and a limiting assembly (20), wherein the tooling body (10) comprises a support platform (11), the support platform (11) being provided with a support portion (12); and the limiting assembly (20) is arranged on the support platform (11), the limiting assembly (20) comprises a limiting pin (21), an elastic member (22) and a traction member (23), the limiting pin (21) being movably connected to the tooling body (10) in a first direction, the traction member (23) being connected to the limiting pin (21), and the elastic member (22) being arranged in the first direction and the elastic member (22) abutting against the space between the limiting pin (21) and the tooling body (10). The maintenance tooling has a simple structure and may be easily mounted and dismounted. The present application further relates to a maintenance tooling assembly.
The present application discloses a power supply control method, a power supply control apparatus, a control device, a control circuit, and a storage medium. The method is applied to a control device in a control circuit; the control circuit further comprises a power supply circuit and a sampling device; the power supply circuit comprises N power supplies, wherein N≥2; each power supply is provided with a power converter; the sampling device is separately connected to the power supplies and the control device; the control device is further connected to the power converters of the power supplies; an output voltage of each power supply is determined by its own adjustment ratio and a preset reference voltage. The method comprises: acquiring power supply state parameters of each of the N power supplies, so as to determine an abnormal power supply; and reducing the present adjustment ratio of the abnormal power supply, so as to control the abnormal power supply to reduce the output voltage on the basis of the present adjustment ratio reduced and the reference voltage. The solution of the present application can implement balanced output of N power supplies, ensuring that the N power supplies can work safely and reliably for a long time.
Provided are a secondary battery, a battery module, a battery pack, and an electric device. The secondary battery includes a cathode piece and a non-aqueous electrolyte. The cathode active material includes a core and a shell covering the core. The core includes Li1+xMn1-yAyP1-zRzO4. The shell includes: a first cladding layer covering the core, and a second cladding layer covering the first cladding layer. The first cladding layer includes pyrophosphate MP2O7 and phosphate XPO4, and the second cladding layer contains carbon. The non-aqueous electrolyte includes a first lithium salt and a first additives, the first lithium salt is one or more selected from the group consisting of LiN(CmF2m+1SO2)(CnF2n+1SO2) and Li(FSO2)2N, in which, m and n represent positive integers. The first additive includes one or more of a compound represented by: O═C═N—R1—N═C═O.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/02 - Electrodes composed of, or comprising, active material
H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0567 - Liquid materials characterised by the additives
H01M 10/0568 - Liquid materials characterised by the solutes
H01M 10/0569 - Liquid materials characterised by the solvents
51.
CONNECTING TERMINAL, BATTERY, AND ELECTRICAL DEVICE
Embodiments of the present application provide a connecting terminal, a battery, and an electrical device. The connecting terminal is used for connecting a sampling circuit and a busbar, including: a first connecting portion including a snap-fit structure, the snap-fit structure being used for snap-fit connection with the busbar; and a second connecting portion connected to the first connecting portion, the second connecting portion being electrically connected to the sampling circuit.
H01M 50/503 - Interconnectors for connecting terminals of adjacent batteriesInterconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
B60L 50/64 - Constructional details of batteries specially adapted for electric vehicles
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
H01M 50/209 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
H01M 50/507 - Interconnectors for connecting terminals of adjacent batteriesInterconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
H01R 4/18 - Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one anotherMeans for effecting or maintaining such contactElectrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
H01R 4/48 - Clamped connectionsSpring connections using a spring, clip or other resilient member
A battery cell (100), a battery (1000), and an electrical apparatus. The battery cell (100) comprises: an electrode assembly (20); and a casing (10), the casing (10) being used for accommodating the electrode assembly (20). The casing (10) is provided with a scoring groove (41) and a buffer groove (50), the scoring groove (41) defining a predetermined pressure relief area (401) which is opened when the battery cell (100) is subjected to pressure relief, and the buffer groove (50) being located on the side of the scoring groove (41) away from the geometric center of the predetermined pressure relief area (401).
A battery cell, a battery, and an electric device. The battery cell comprises a casing, a pressure relief structure, and an electrode assembly. The casing is provided with a first wall. The pressure relief structure is disposed on the first wall. The electrode assembly is a wound electrode assembly and is disposed in the casing, and the electrode assembly comprises a flat portion and a first bending portion. Along a first direction, the first bending portion is disposed on the side of the flat portion facing the first wall. A first boundary line is provided between the first bending portion and the flat portion. The distance between the first boundary line and the first wall is L, wherein L≥5 mm. The first direction is perpendicular to the axial direction of the electrode assembly.
The embodiments of the present application provide a battery cell, a battery, an electrical device, and an energy storage apparatus. The battery cell comprises a housing, the housing comprises a first wall and a second wall, the first wall and the second wall are welded to form a first welded area, the first wall comprises a first area and a second area arranged along a first direction, the first area is arranged close to the first welded area, the thickness of the first area is larger than the thickness of the second area, and the first direction is parallel to the thickness direction of the second wall. The technical solutions provided by the embodiments of the present application can improve battery reliability.
12122; and the thickness of the first opening portion is greater than the thickness of the first body portion, and the second direction, the third direction and the first direction are perpendicular to each other in a pairwise manner. On the basis of the technical solution in the present application, the reliability of the battery can be improved.
Disclosed in the present disclosure are an electrode assembly, a preparation method therefor, a battery cell, a battery, an electrical device and an energy storage device. The electrode assembly comprises: a jellyroll structure, the jellyroll structure being formed by rolling up a laminate comprising a positive electrode sheet and a negative electrode sheet, a separator being interposed between the positive electrode sheet and the negative electrode sheet, the jellyroll structure comprising bending zones, the positive electrode sheet comprising at least one positive electrode bending part located in the bending zones, the negative electrode sheet comprising at least one negative electrode bending part located in the bending zones, and in the rolling axis direction of the jellyroll structure, two ends of the separator exceeding the positive electrode bending part and the negative electrode bending part; and a protective layer attached to the surface of the positive electrode bending part and/or the surface of the negative electrode bending part, at least one end of the protective layer exceeding the separator in the rolling axis direction of the jellyroll structure.
H01M 50/59 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
57.
CURRENT COLLECTOR WELDING JIG, CURRENT COLLECTOR WELDING DEVICE AND CURRENT COLLECTOR WELDING METHOD
A current collector welding jig, comprising a pressing member (1) and an air inlet channel (2a). The pressing member is provided with an accommodation recess (1a) for accommodating a current collector (4). The pressing member is provided with an air passing channel (1b) and a plurality of clearance recesses (1c). The clearance recesses are distributed in the peripheral side of the air passing channel so as to expose areas to be welded on the current collector, each clearance recess communicating with the air passing channel. One end of the air inlet channel communicates with an air source, and the other end thereof communicates with the air passing channel, so that protective gas in the air inlet channel can flow to the clearance recesses through the air passing channel. The present invention further relates to a current collector welding device and a current collector welding method.
B23K 26/142 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor for the removal of by-products
A battery swapping method for a commercial vehicle, comprising the following steps: on the basis of the position of a power insufficiency battery on a battery swapping vehicle, controlling a battery swapping device to drive to the position below the battery swapping vehicle (S510); acquiring a posture of the power insufficiency battery on the battery swapping vehicle, and adjusting an operation position of the battery swapping device on the basis of the posture of the power insufficiency battery (S520); and controlling the battery swapping device to dismount the power insufficiency battery and install a fully-charged battery (S530). According to the battery swapping method, the battery swapping device is controlled to autonomously drive to the position below the battery swapping vehicle without lifting the battery swapping vehicle, and the operation position of the battery swapping device can be directly adjusted on the basis of the posture of the power insufficiency battery, so that the position matching between the battery swapping device and the power insufficiency battery can be achieved, thereby achieving high adjustment accuracy and improving the battery swapping efficiency. Moreover, there is no need to excavate a trench on the ground and lay tracks, such that the motion range of the battery swapping device is not limited.
The present application discloses a battery cell, a battery, and an electric device. The battery cell comprises a casing, an electrode assembly, a current collecting assembly, and an anti-oxidation layer. The casing is provided with an accommodating cavity. The electrode assembly is arranged in the accommodating cavity. The current collecting assembly is connected to the electrode assembly, and the current collecting assembly is connected to the side of the casing facing the accommodating cavity. The anti-oxidation layer is arranged on the side of the casing away from the accommodating cavity, and the orthographic projection of the anti-oxidation layer on the casing at least partially overlaps the orthographic projection of the current collecting assembly on the casing. The current collecting assembly is arranged in the casing to be connected to the electrode assembly, and the electrode assembly is electrically connected to an external device to realize transmission of electric energy. The anti-oxidation layer is arranged at the position where the current collecting assembly and the casing are connected, so that the risk of cracks and liquid leakage caused by corrosion at the position where the current collecting assembly and the casing are connected, due to contact with moisture and oxygen in the air, can be reduced, the overall structural strength of the casing is improved, and the operation reliability of the battery cell is improved.
The present application provides a separator, a battery, and an electric device. The separator comprises: a base membrane and a composite coating disposed on at least one side of the base membrane, the composite coating comprising a ceramic layer, the ceramic layer comprising a ceramic material and a polyacrylate layer directly bonded to one side of the ceramic layer, the polyacrylate layer comprising an acrylic acid alkali metal salt polymer, and the ceramic layer being disposed on the side close to the base membrane. The ceramic layer and the polyacrylate layer in the composite coating can form an active ion bridge high-speed channel, so that the separator can improve the transmission rate of active ions, so as to reduce the polarization of a battery during charge and discharge, thus improving the fast charging performance and cycle performance of the battery.
A positive electrode composite current collector, a positive electrode sheet, a secondary battery, and an electrical apparatus. The positive electrode composite current collector comprises a polymer support layer, a conductive layer, and a high-resistance layer; the conductive layer is arranged on at least one surface of the polymer support layer; the high-resistance layer is arranged on the surface of the conductive layer away from the polymer support layer, the electrical resistivity of the high-resistance layer is higher than the electrical resistivity of the conductive layer, the total sheet resistance of the high-resistance layer and the conductive layer is R1, and 50 mΩ/□≤R1≤80 mΩ/□. The positive electrode composite current collector can maintain normal electrode conductivity, so that the DCR of a battery is within a proper range, and the battery has a high nail penetration test pass rate, thereby improving the safety performance of the battery.
A composite current collector, an electrode sheet, a secondary battery and an electric device, which can improve the cycle performance of the secondary battery. The composite current collector comprises a support layer, and a bonding layer and an electrically conductive layer, which are sequentially stacked on at least one side surface of the support layer, wherein the bonding layer comprises a bonding-layer main body and a protruding portion, the protruding portion protruding in the thickness direction of the bonding layer and being embedded in the electrically conductive layer.
An electrolyte, a lithium secondary battery and an electric device. The electrolyte comprises a first solvent, a silane compound containing a carbon-carbon double bond and a cyclic lithium borate compound, wherein the first solvent comprises a cyclic carbonate compound; and based on the total mass of the electrolyte, the mass content W3 of the cyclic carbonate compound, the mass content W1 of the silane compound containing a carbon-carbon double bond and the mass content W2 of the cyclic lithium borate compound satisfy: 0.001≤(W1+W2)/W3≤2.67. The silane compound containing a carbon-carbon double bond and the cyclic lithium borate compound are used in combination, and therefore the flexibility and thermal stability of an SEI film can be improved, thereby reducing the degrees of gas production of a lithium secondary battery during the processes of cycling and storage and improving the storage performance, fast-charging performance and cycle performance of the lithium secondary battery.
A composite current collector, a pole piece, a secondary battery and an electrical apparatus. The composite current collector comprises a supporting layer, and a bonding layer and a conductive layer which are sequentially stacked on at least one side surface of the supporting layer. The conductive layer comprises a conductive layer main body and first protruding parts. The first protruding parts protrude in the thickness direction of the conductive layer and are embedded into the bonding layer.
Disclosed in the present application are a battery on/off circuit, a circuit control method, a power supply circuit and an electronic device. The battery on/off circuit comprises an external connecting assembly, a battery connecting assembly and a switching circuit, wherein the external connecting assembly is used for connecting a load circuit; the battery connecting assembly is used for connecting a battery; and the switching circuit is separately connected to the external connecting assembly and the battery connecting assembly, and is used for controlling the external connecting assembly and the battery connecting assembly to be in a disconnected state, so that the external connecting assembly and the load circuit form a first circuit, or, controlling the external connecting assembly and the battery connecting assembly to be in a connected state, so that the battery and the load circuit form a second circuit. In this way, the present application can realize independent control over whether a battery is connected to a circuit for power supply.
Disclosed in the present application are a wrapping apparatus and wrapping method for an electrode assembly. The electrode assembly comprises an electrode main body and a tab portion, wherein the electrode main body has a first direction, a second direction and a third direction, and comprises two main surfaces, two end surfaces and two side surfaces, and the tab portion protrudes from the first one of the two end surfaces. The wrapping apparatus comprises a first wrapping assembly and a first positioning assembly. The first wrapping assembly is configured to position a wrapping film. The wrapping film comprises two main wrapping areas and a connecting area, with an opening being provided in the connecting area. The first positioning assembly is configured to position the electrode assembly and arrange the tab portion to face the connecting area. The first positioning assembly and the first wrapping assembly are configured to move relative to each other, such that the tab portion passes through the opening along with the relative movement of the first positioning assembly and the first wrapping assembly, and the connecting area wraps around the first one of the two end surfaces. In this way, the interference of the tab portion on the wrapping process can be reduced, and the wrapping effect is improved.
A negative electrode sheet, a secondary battery, and an electric device. The negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer formed on at least one surface of the negative electrode current collector; the negative electrode film layer has a first surface away from the negative electrode current collector and a second surface opposite to the first surface; the thickness of the negative electrode film layer is denoted as H; the region within the thickness range from the first surface to 0.3 H of the negative electrode film layer is denoted as a first region of the negative electrode film layer; the region within the thickness range from the second surface to 0.3 H of the negative electrode film layer is denoted as a second region of the negative electrode film layer; the first region comprises a spherical or/and spheroid first silicon-based material. The negative electrode sheet can reduce its own expansion rate and improve the cycle stability and storage performance of the battery.
A silicon-carbon composite material, a preparation method, a secondary battery, and an electric device. The silicon-carbon composite material comprises an inner area and an outer area; the inner area is mainly composed of silicon-containing material particles; and the outer area is mainly composed of carbon-based material particles. The silicon-carbon composite material has excellent gram capacity, and can improve the high-temperature storage performance and cycle stability of the battery.
The present application relates to a battery cell (20) and a preparation method therefor, a battery (100) and an electric device. The preparation method for the battery cell (20) comprises: determining that the battery cell (20) is in an uncharged state; spraying an insulating material onto at least a partial region of the outer surface of a case (22) of the battery cell (20) by means of an electrostatic spraying method; curing the region, onto which the insulating material is sprayed, of the case (22), so as to obtain the battery cell (20) containing an insulating layer (24); and injecting an electrolyte into the battery cell (20) containing the insulating layer (24). In the preparation method for the battery cell (20) of the present application, by subjecting the battery cell (20) in the uncharged state to insulating spraying, which may be performed by means of an electrostatic spraying method, the utilization rate of a coating of the insulating layer (24) during a production process of the battery (100) can be improved, and the production costs can be reduced.
An energy storage box (100) and an energy storage apparatus. The energy storage box (100) comprises a box body (10), wherein the box body (10) defines a mounting space (11), mounting beams (12) are provided in the mounting space (11) and located at the top of the mounting space (11), the mounting beams (12) are fixed to the box body (10), and a bottom wall (13) of the mounting space (11) and the mounting beams (12) are opposite each other and spaced apart in the direction of height of the energy storage box (100), the bottom wall (13) of the mounting space (11) being of a plate-shaped structure; and mounting columns (20), wherein the mounting columns (20) are arranged in the mounting space (11), two ends of each mounting column (20) respectively being fixedly connected to one mounting beam (12) and the bottom wall (13) of the mounting space (11).
H01M 50/291 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
71.
LITHIUM SUPPLEMENTING ELECTRODE SHEET AND PREPARATION METHOD THEREFOR, LUBRICANT, BATTERY, AND ELECTRIC DEVICE
The present application relates to the technical field of batteries, and to a lithium supplementing electrode sheet and a preparation method therefor, a lubricant, a battery, and an electric device. The preparation method for the lithium supplementing electrode sheet comprises: by means of asynchronous rolling, calendaring a lithium material by using a calendaring roller, a lubricant being provided between the lithium material and the calendaring roller; and laminating the calendared lithium material to the surface of an electrode sheet substrate, wherein the lubricant comprises lubricating oil and inorganic particles dispersed in the lubricating oil. In the preparation method for the lithium supplementing electrode sheet of the present application, there are a large number of binding sites between a lithium film layer obtained by calendaring and an active material layer of an electrode sheet substrate, so that the binding force between the lithium film layer and the active material layer can be improved, thus solving the problems in the prior art of difficulty of laminating a lithium film layer to an electrode sheet substrate and a poor binding force between the lithium film layer and the active material layer. The prepared lithium supplementing electrode sheet has good wettability in an electrolyte, and the battery prepared using the lithium supplementing electrode sheet has good cycle performance and good low-temperature resistance.
The present application relates to the technical field of batteries. Disclosed in the present application are a battery cell, a battery, and an electric device. The battery cell comprises a shell and a pressure relief notch, wherein the shell is flat and comprises two first walls opposite each other in the direction of the thickness of the shell; and the pressure relief notch is arranged in at least one of the first walls. In the battery cell according to the embodiments of the present application, an area enclosed by the pressure relief notch is not limited; moreover, the pressure relief notch is also easier to process, and the manufacturing cost is reduced.
A pole inspection device and inspection method. The pole inspection device (100) comprises image collection devices (10), a first light source, and a second light source; the image collection devices (10) are movably arranged and have a first position where an extreme pole (200) is inspected and a second position where a minimalistic pole (400) is inspected; the first light source is provided on one side of the image collection devices (10) and is configured to emit first light towards at least one side surface of the extreme pole (200) in the first position of the image collection devices (10); the second light source is configured to be arranged above the image collection devices (10) and surrounds the minimalistic pole (400); and the second light source is configured to emit second light towards the minimalistic pole (400) in the second position of the image collection devices (10).
An electrode sheet, a secondary battery, and an electric device. The electrode sheet comprises an active material layer, the active material layer containing a first binder and a second binder, the first binder comprising an alkali metal polymer salt, the bonding strength of the second binder being greater than that of the first binder, the weight percentage of the alkali metal polymer salt in the active material layer being A, the weight percentage of the second binder in the active material layer being B, and A and B satisfying: 0
DGDD representing the D peak intensity at 1350±50 cm-1GG representing the G peak intensity at 1580±50 cm-1 in the Raman spectrum; and the second carbon-based material is an amorphous carbon material.
A battery processing apparatus (600) and processing method. The battery processing apparatus (600) comprises a material conveying assembly (610), a pairing assembly (630) and a welding assembly (690); the material conveying assembly (610) is used for conveying a first electrode assembly (250) and a second electrode assembly (251), wherein the first electrode assembly (250) and the second electrode assembly (251) each comprise an electrode body portion (220) and a tab portion (201) arranged on the electrode body portion (220); the pairing assembly (630) is used for pairing the first electrode assembly (250) and the second electrode assembly (251), so as to make the electrode body portion (220) of the first electrode assembly (250) and the electrode body portion (220) of the second electrode assembly (251) overlap each other; the welding assembly (690) is used for welding the tab portion (201) of the paired first electrode assembly (250) and the tab portion (201) of the paired second electrode assembly (251) to each other. In this way, the production efficiency of a battery cell (1) can be improved.
B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
H01M 50/00 - Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
77.
END CAP WELDING DEVICE, BATTERY ASSEMBLING SYSTEM, ASSEMBLY METHOD, AND BATTERY CELL
Provided are an end cap welding device (30) for a battery cell (100), an assembly method, and the battery cell (100). The battery cell (100) comprises a casing (101) and an end cap (102); the end cap (102) is arranged at one end of the casing (101); a first connecting seam and a second connecting seam that are arranged in the circumferential direction of the casing (101) are formed at the connection position between the casing (101) and the end cap (102); the end cap welding device (30) comprises a material conveying assembly (310) and a welding assembly (340); the material conveying assembly (310) comprises a material conveying line (311), a first clamp (312) and a second clamp (313), and the first clamp (312) and the second clamp (313) are spaced apart on the same material conveying line (311); the first clamp (312) is configured to fix the casing (101) and enable the first connecting seam to be visible; the second clamp (313) is configured to fix the casing (101) and enable the second connecting seam to be visible; and the welding assembly (340) is arranged along the material conveying line (311), used for welding the first connecting seam when the first clamp (312) where the battery cell (100) is fixed is conveyed to the welding assembly (340), and used for welding the second connecting seam when the second clamp (313) where the battery cell (100) is fixed is conveyed to the welding assembly (340).
B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
B23K 37/00 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
H01M 50/169 - Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
78.
TAB BENDING MECHANISM AND BATTERY ASSEMBLING SYSTEM
A secondary battery and an electric device. The secondary battery comprises a negative electrode sheet; the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector and comprising a negative electrode active material; the negative electrode active material comprises a first carbon-based material and a second carbon-based material; the first carbon-based material comprises artificial graphite of secondary particles; the second carbon-based material comprises an outer region and an inner region located on the inner side of the outer region; the outer region refers to a region extending from the particle surface of the second carbon-based material to the interior of the particle by a distance of 2.5 μm; and in the cross-sectional view of the second carbon-based material, the total pore area of the outer region is denoted as S1, the total pore area of the inner region is denoted as S2, and S2 is greater than S1.
A secondary battery and an electronic device. The secondary battery comprises a negative electrode sheet, the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector, and the negative electrode film layer comprises a negative electrode active material, wherein the negative electrode active material comprises a first carbon-based material and a second carbon-based material, the first carbon-based material has a pore structure, and the total pore area S2 of an internal region of the first carbon-based material is larger than the total pore area S1 of an external region of the first carbon-based material; and the second carbon-based material meets ID/IG≤0.140.
A battery cell (500), a battery pack (400), and an electric device (1000). The battery cell (500) comprises a casing (510), an electrode assembly (520), and an adapter (100). The casing (510) is provided with two electrode terminals (511, 512). The electrode assembly (520) comprises two tabs (521, 522) having opposite polarities. The adapter (100) is provided between the electrode assembly (520) and the casing (510) and comprises two adapter portions (110, 120). The first adapter portion (110) is connected to the first electrode terminal (511) and the first tab (521). The second adapter portion (120) is electrically connected to the second electrode terminal (512) and the second tab (522). Part of the first adapter portion (110) and part of the second adapter portion (120) overlap in the axial direction of the battery cell (500).
A battery cell and a manufacturing method therefor, a battery, an electrical device, and a pre-lithiated positive electrode sheet and a manufacturing method therefor. The preparation method for the battery cell comprises the steps of: providing a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte, an insulating coating slurry and lithium metal simple substance material; coating the surface of a positive electrode active material layer with the insulating coating slurry, and drying same to form an insulating coating; attaching the lithium metal simple substance material to the surface of the insulating coating so as to obtain a pretreated positive electrode sheet; assembling the obtained pretreated positive electrode sheet, the separator and the negative electrode sheet to obtain an electrode assembly; and assembling the obtained electrode assembly and the electrolyte to obtain the battery cell. Under the function of the electrolyte, the pretreated positive electrode sheet realizes a pre-lithiation reaction by means of a self-discharge effect and forms a pre-lithiated positive electrode sheet. The battery cell has a high initial coulombic efficiency, good cycle performance and good processability.
Disclosed in the present application are a tab threading apparatus, assembling device and assembling method for batteries. The battery comprises a casing and an electrode assembly, the casing being provided with an accommodation cavity, and a through hole being formed in the casing. The electrode assembly is arranged in the accommodation cavity, and the tab threading apparatus is used for guiding a tab portion of the electrode assembly to extend out of the through hole. The tab threading apparatus comprises a clamping mechanism and a driving mechanism, and the driving mechanism is configured to drive the clamping mechanism to clamp the tab portion located in the accommodation cavity to extend out of the accommodation cavity through the through hole. In this way, the present application can effectively reduce the assembly difficulty of batteries.
A tab cutting mechanism and a battery assembly system. The tab cutting mechanism (10) comprises a supporting structure (100), a cutter assembly (200), an electrode assembly positioning assembly (300), and a first driving assembly (400); the cutter assembly (200) comprises a first member (210) and a second member (220), and the first member (210) is mounted on the supporting structure (100); the electrode assembly positioning assembly (300) is mounted on the supporting structure (100) and is configured to support and position a body portion (22) of an electrode assembly (20), and the first member (210) is used for supporting tab portions (21) of the electrode assembly (20); and the first driving assembly (400) is mounted on the supporting structure (100) and connected to the second member (220), and is configured to drive the second member (220) to move, so that the second member (220) matches the first member (210) to cut the tab portions (21). The tab cutting mechanism solves the problems of poor alignment, dislocation, and inconsistent external dimensions of the tab portions (21), so that the tab portions (21) are more regular, facilitating the subsequent addition of a housing (10a) to the electrode assembly (20), improving the yield rate of a battery (1).
A secondary battery, an electric device, a positive electrode active material and a preparation method therefor, and a positive electrode sheet, relating to the technical field of batteries. The secondary battery comprises a positive electrode sheet; the positive electrode sheet comprises lithium phosphate-containing positive electrode active particles, each lithium phosphate-containing positive electrode active particle comprises a central part and a surface part, and the surface part is continuously or discontinuously distributed on the surface of the central part; the thickness of the surface part is less than or equal to 10 nm, and the lithium content of the central part is greater than that of the surface part. The secondary battery has high cycle performance.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
A tab welding mechanism (10) and a battery assembly system (20). The tab welding mechanism (10) comprises a base platform (11), a support base (100), a tab pressing structure (200), and a welding assembly (300). The support base (100) is provided on the base platform (11) and is used for supporting and fixing a cell body (22a) of a battery cell (20a); the tab pressing structure (200) is provided on the base platform (11) and is configured to be capable of moving toward the support base (100), so as to press and gather a plurality of laminated tab pieces (211a) of the battery cell (20a); and the welding assembly (300) is provided on the base platform (11) and is configured to be capable of moving toward the support base (100), so as to weld the plurality of gathered tab pieces (211a) to form a tab portion (21a).
B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
B23K 20/10 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
A negative electrode sheet and a manufacturing method therefor, a battery, and an electric device. The negative electrode sheet comprises a current collector, a negative electrode active material layer, and a conductive layer; the negative electrode active material layer is provided on at least one side of the current collector; the conductive layer is provided on the side of the negative electrode active material layer distant from the current collector; the conductive layer comprises a lithium acrylate polymer; and the bonding force between the negative electrode active material layer and the current collector is negatively correlated with the surface density of the conductive layer. The negative electrode sheet achieves a high bonding force between the negative active material layer and the current collector, and a battery comprising the negative electrode sheet has excellent cycle performance and excellent fast charging performance.
The present application relates to the technical field of batteries, and provides a battery cell, a battery, and an electric device. The battery cell comprises a casing, a plurality of electrode assemblies, and a buffer structure; the electrode assemblies are arranged in the casing; the buffer structure is arranged between the two adjacent electrode assemblies; and/or the buffer structure is arranged between the electrode assemblies and the inner wall of the casing; and the compression volume V of the buffer structure, the compression ratio B of the buffer structure, and the battery cell capacity Cn of the battery cell satisfy the following relational expression: 0.7(mL/Ah)≤V*B/Cn≤1.0(mL/Ah). The deposition layer formed by the negative electrode in the battery cell can be buffered and limited by the buffer structure, so that the probability of micro-short circuit of the electrode assemblies caused by puncturing the separator by a sharp structure formed by growing the deposition layer in any direction is reduced.
The present disclosure provides a method for determining the content of silicon in a material. The determination method comprises: ashing a carbon-based material, so as to obtain an ashed product containing silicon; dissolving silicon in the ashed product by using an alkali solution, so as to obtain a silicon-containing solution; subjecting the silicon-containing solution to an ICP-OES test, so as to obtain the content of silicon in the silicon-containing solution; and calculating the content of silicon in the carbon-based material on the basis of the content of silicon in the silicon-containing solution.
G01N 21/73 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
Disclosed in the present disclosure are a secondary battery and an electrical device. The secondary battery comprises a positive electrode sheet, the positive electrode sheet comprising a positive electrode active layer, and the positive electrode active layer comprising a first positive electrode active part, an intermediate positive electrode active part and a second positive electrode active part which are successively arranged. During a charging and discharging cycle process after an initial cycle of the positive electrode sheet, the areal capacity of the intermediate positive electrode active part is smaller than the areal capacity of the first positive electrode active part and/or smaller than the areal capacity of the second positive electrode active part. The present disclosure enables the areal capacity of the intermediate part to be lower than the areal capacity of an edge part, and the swelling ratio of the intermediate part to be lower than the swelling ratio of the edge part during the charging and discharging cycle process after the initial cycle of the positive electrode sheet, so as to reduce and/or alleviate lithium plating of a corresponding negative electrode sheet, thus reducing the risk of capacity plunge caused by lithium plating in late-stage cycling of secondary batteries, and improving safety performance of secondary batteries.
The present disclosure relates to the technical field of lithium batteries, in particular to a secondary battery, a manufacturing method, and an electrical apparatus. The secondary battery comprises a negative electrode sheet. A current collector comprises a first region and a second region, the second region being close to a tab, a first active substance layer being located in the first region, and a second active substance layer being located in the second region. The mass fraction of a silicon-based material in the second active substance layer is greater than the mass fraction of the silicon-based material in the first active substance layer, and the mass fraction of a first carbon material in the second active material layer is greater than the mass fraction of the first carbon material in the first active material layer. The present application can improve the capacity of the second region, increase the charging speed of the second region, and mitigate precipitation of lithium dendrites in the second region.
A signal sampling circuit, a battery management system, a battery system and an electrical apparatus. The signal sampling circuit (10) comprises a first voltage divider module (11), a first switch module (12) and a sampling module (13), wherein the first voltage divider module (11) and the first switch module (12) are connected in series between a point to be tested and a reference signal terminal of the sampling module (13), a first control terminal of the first switch module (12) is connected to a first power supply terminal, a second control terminal of the first switch module (12) is connected to an enable signal terminal of the sampling module (13), the sampling module (13) is connected to a first reference ground, the first voltage divider module (11) is internally provided with a sampling point, and the sampling module (13) is used for collecting a sampling signal at the sampling point. The present application helps to reduce the cost of signal sampling circuits.
G01R 1/04 - HousingsSupporting membersArrangements of terminals
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
93.
HIGH-VOLTAGE POWER DISTRIBUTION APPARATUS, BATTERY AND ELECTRICAL APPARATUS
A high-voltage power distribution apparatus (400), a battery (100) and an electrical apparatus. The high-voltage power distribution apparatus (400) comprises a housing (40), a cover body (41) and a low-voltage terminal (42); the housing (40) has an opening; the cover body (41) seals the opening, and forms a mounting chamber with the housing (40); the low-voltage terminal (42) is integrated onto a target member, the target member being the housing (40) or the cover body (41); a first end of the low-voltage terminal (42) is exposed outside the mounting chamber, and a second end of the low-voltage terminal (42) is electrically connected to a low-voltage circuit inside the housing (40); at least one side wall of the target member is provided with a protective housing (43) having an outward opening; the first end of the low-voltage terminal (42) is located inside the protective housing (43). With regard to the high-voltage power distribution apparatus (400), the battery (100) and the electrical apparatus, the number of components inside the high-voltage power distribution apparatus (400) can be reduced to some extent, thus reducing the area occupied by the high-voltage power distribution apparatus (400).
H01M 50/244 - Secondary casingsRacksSuspension devicesCarrying devicesHolders characterised by their mounting method
H01M 50/298 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by the wiring of battery packs
Disclosed in the present application are a hot-pressing roller mechanism, a pressing roller mechanism, an adhesive application device and a battery production system. The hot-pressing roller mechanism comprises a hot-pressing roller and a heating assembly, wherein the heating assembly and the hot-pressing roller are spaced apart from each other; and the heating assembly is configured to perform non-contact heating on the hot-pressing roller. By means of non-contact heating, no structural member is introduced to the surface of the hot-pressing roller, such that the phenomenon of foreign matter being introduced to the surface of an electrode sheet during the process of the hot-pressing roller performing hot pressing on the electrode sheet can be alleviated, thus increasing the adhesive application yield. The hot-pressing roller mechanism is used to perform hot pressing on an electrode sheet to which an adhesive has been applied, and to smooth and compact an adhesive tape on the surface of the electrode sheet, thus enhancing the bonding tightness between the adhesive tape and the electrode sheet, and increasing the adhesive application yield.
Disclosed are a transmission device, a stirring device and a battery production apparatus. The transmission device comprises a rotating shaft (110), a support assembly (120) and an oil baffle assembly (130), wherein the rotating shaft (110) is configured to be connected to a driving device (200) and is driven by the driving device (200) to rotate; the support assembly (120) is movably connected to the rotating shaft (110) and allows the rotating shaft (110) to pass through same; the oil baffle assembly (130) comprises an oil thrower disc (131), the oil thrower disc (131) being sleeved on the surface of the rotating shaft (110), and the oil thrower disc (131) being located on the side of the support assembly (120) that is close to the driving device (200) and being spaced apart from the support assembly (120); and an accommodating groove (125) is formed in the surface of the support assembly (120) that faces the oil thrower disc (131), and the accommodating groove (125) is configured to receive lubricating grease thrown out by the oil thrower disc (131). The transmission device can reduce the risk of a slurry being contaminated by the lubricating grease.
The present application is applicable to the technical field of batteries. Provided are a conveying device and a battery production line. The conveying device comprises a conveying mechanism, a blocking mechanism and a damping mechanism, wherein the conveying mechanism is provided with a conveying area, and is used to convey materials in the conveying area in a conveying direction; the blocking mechanism is configured to extend into the conveying area to stop the movement of the materials in the conveying direction; the damping mechanism is at least partially located in the conveying area; and in the conveying direction, the damping mechanism and the blocking mechanism are spaced apart from each other, and the damping mechanism can be driven by the materials to move relative to the conveying mechanism. The conveying device provided in the present application is used to convey holder cups, and resistance is provided for the holder cups by means of the damping mechanism, so as to reduce impact forces of the holder cups on the blocking mechanism, thus prolonging the service life of the blocking mechanism.
A battery cell (200), a battery (400), and an electric device (500). The battery cell (200) comprises: an electrode assembly (300) comprising a positive electrode sheet and a negative electrode sheet, the positive electrode sheet and the negative electrode sheet form a flat region (301); and a housing (60) comprising a first wall portion (11) and two second wall portions (12), the two second wall portions (12) being respectively located on two sides of the flat region (301) in a first direction. The first wall portion (11) comprises a shell body (111) and a pressure relief portion (112), wherein the shell body (111) is arranged around the periphery of the pressure relief portion (112), a notch groove (113) is formed in the pressure relief portion (112) and has a first groove wall section (114) obliquely extending in the first direction on a bottom wall thereof, and the first groove wall section (114) is at an angle to the first direction.
A flattening device and a battery assembly system, which solve the problem in the prior art of an insulating protective film outside an electrode assembly being wrinkled. The flattening device comprises a frame, a driving mechanism, and a pair of rollers matching with each other. The rollers are rotationally connected to the frame and are configured to flatten a member to be flattened; and the driving mechanism is arranged on the frame, is connected to the rollers, and is configured to drive the pair of rollers to rotate synchronously. In this way, the driving mechanism drives the pair of rollers to rotate synchronously, such that the linear speeds of outer surfaces of the two rollers are the same, thereby solving the problem in the prior art of rotation speeds of a pair of rollers being different due to two driving sources being used to respectively drive the pair of rollers.
A dust removal device and a battery production system. The dust removal device comprises a dust removal assembly, a rotary driving assembly, and a first driving assembly, wherein the dust removal assembly comprises dust removal brushes and is configured to clean welding slag on a battery cell preform; the rotary driving assembly is connected to the dust removal brushes and is configured to drive the dust removal brushes to rotate; and the first driving assembly is connected to the dust removal brushes and the rotary driving assembly and is configured to drive the dust removal brushes and the rotary driving assembly to move together in a first direction. In this way, the dust removal brushes can move while rotating, can clean welding slag having strong adhesion, and can clean the welding slag on hollow poles of the battery cell preform in a large area. In addition, the dust removal brushes can be used to clean welding marks of different shapes, thereby improving the cleaning effect of the dust removal device and expanding application ranges.
The present application provides a dust removal device and a battery production system. The dust removal device comprises dust removal assemblies and a first driving assembly. Each dust removal assembly comprises a dust removal brush, and the first driving assembly is connected to the dust removal brush and is configured to be capable of driving the dust removal brush to move in a first direction. In this way, the dust removal brush can clean weld spatters while moving, allowing for a large area of removal of weld spatters on hollow poles of battery cell preforms; and furthermore, the dust removal brush can achieve cleaning of strip-shaped weld marks, improving the cleaning effect of the dust removal device.
