A power storage device includes a cell assembly including a plurality of power storage cells arranged in an X direction and a connection portion electrically connecting the power storage cells adjacent to each other in the X direction. A bent portion is provided between the power storage cells electrically connected by the connection portion.
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 50/489 - Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
H01M 50/55 - Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
H01M 50/552 - Terminals characterised by their shape
A power storage cell includes a pair of cell units, an intermediate member, and a cell case. Each cell unit includes at least one electrode body, a laminated exterior body, and a current collector terminal. The pair of cell units are disposed side by side in an orthogonal direction. A current collector terminal of a first cell unit and a current collector terminal of a second cell unit include overlapping portions overlapping each other. The intermediate member is positioned so as to sandwich the overlapping portions in a stacking direction, and includes a pair of arm portions extending in the orthogonal direction. A length of each arm portion in the orthogonal direction is 90% or more of a distance between a facing surface in the first cell unit and a facing surface in the second cell unit.
A power storage cell comprises a first cell unit (101), a second cell unit (102), and a reinforcement section (510) that reinforces a connection section between the first cell unit and the second cell unit. Each cell unit includes at least one electrode body, a laminate exterior body (160), and a collector terminal (140) protruding from the laminate exterior body. The collector terminal (140) of the first cell unit (101) is connected to the collector terminal (140) of the second cell unit (102). The reinforcement section (510) is fixed to the connection section between the collector terminal (140) of the first cell unit (101) and the collector terminal (140) of the second cell unit (102), and extends from an edge section (162) of the laminate exterior body of the first cell unit (101) to an edge section (162) of the laminate exterior body of the second cell unit (102).
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
H01M 50/178 - Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
H01M 50/211 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
H01M 50/289 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by spacing elements or positioning means within frames, racks or packs
H01M 50/293 - 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 the material
H01M 50/50 - Current conducting connections for cells or batteries
H01M 50/548 - Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
A secondary battery includes electrode components and battery terminals, wherein the electrode components each include tab groups protruding from opposite ends, as viewed in a first direction, the tab group of each electrode component which is on a first side in the first direction differs in position in a second direction orthogonal to the thickness direction of the electrode components from the tab group of any other electrode component which is on the first side in the first direction, as viewed in a first direction, the tab group of each electrode component which is on a second side in the first direction differs in position in the second direction from the tab group of any other electrode component which is on the second side in the first direction, the battery terminals each include a member including electrode joint sections each bonded to a tab group positioned to be bondable thereto.
An electricity accumulation apparatus includes: a cell joining body (cell module) including a plurality of electricity accumulation cells; and a case that houses the cell joining body. Hole portions (engagement portions) to and from which hooks are attachable and removable are provided in an end portion of the cell joining body in the X-direction (joining direction) (longitudinal direction).
A power storage cell includes: a cell module including a plurality of cell units; a cell case that accommodates the cell module; and a bonding member provided within the cell case. The cell case is formed in a rectangular parallelepiped shape. The cell module has a facing corner that faces a three-dimensional corner of the cell case. The bonding member includes a corner bonding portion that bonds the three-dimensional corner of the cell case to the facing corner.
H01M 50/474 - Spacing elements inside cells other than separators, membranes or diaphragmsManufacturing processes thereof characterised by their position inside the cells
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 10/653 - Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
H01M 50/103 - Primary casingsJackets or wrappings characterised by their shape or physical structure prismatic or rectangular
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
A power storage device configured to store electric power includes a casing, one or more cell connected bodies, and a base member on which the one or more cell connected bodies are carried. Each of the one or more cell connected bodies includes a plurality of power storage cells and a connection portion that electrically connects the power storage cells to each other. The one or more cell connected bodies and the base member are accommodated in the casing.
H01M 50/209 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
H01M 50/249 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders specially adapted for aircraft or vehicles, e.g. cars or trains
H01M 50/367 - Internal gas exhaust passages forming part of the battery cover or caseDouble cover vent systems
H01M 50/502 - Interconnectors for connecting terminals of adjacent batteriesInterconnectors for connecting cells outside a battery casing
A storage cell includes a first cell unit group including a plurality of first cell units, and a second cell unit group including a plurality of second cell units. Each of the cell units includes an electrode body, a laminate exterior body, a positive electrode current collector terminal, and a negative electrode current collector terminal. The pair of first cell units has a first connection portion, and the pair of second cell units has a second connection portion. In the first cell unit group, the first connection portions are arranged along the first direction so as to be located alternately up and down. In the second cell unit group, the second connection portions are arranged along the first direction so as to be located alternately up and down and so as not to overlap with the first connection portions respectively in the second direction.
H01M 50/474 - Spacing elements inside cells other than separators, membranes or diaphragmsManufacturing processes thereof characterised by their position inside the cells
H01M 50/103 - Primary casingsJackets or wrappings characterised by their shape or physical structure prismatic or rectangular
H01M 50/538 - Connection of several leads or tabs of wound or folded electrode stacks
A power storage device includes a casing and a cell connected body accommodated in the casing. The cell connected body includes a plurality of power storage cells and a connection portion that electrically connects the power storage cells to each other. The power storage device further includes a holding member that holds at least one power storage cell, between an inner surface of the casing and the cell connected body.
H01M 50/264 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
H01M 50/204 - Racks, modules or packs for multiple batteries or multiple cells
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 50/367 - Internal gas exhaust passages forming part of the battery cover or caseDouble cover vent systems
10.
POWER STORAGE CELL AND METHOD FOR MANUFACTURING POWER STORAGE CELL
A power storage cell includes: a pair of electrode bodies each having an electrode tab and disposed to face each other; an interposed member made of an insulating material and disposed between the electrode tabs of the pair of electrode bodies; a laminate exterior body that accommodates the pair of electrode bodies and the interposed member; a conductive film provided on surfaces of the interposed member and connected to each of the electrode tabs; and a current collector terminal that is connected to the conductive film and protrudes from the laminate exterior body.
H01M 50/474 - Spacing elements inside cells other than separators, membranes or diaphragmsManufacturing processes thereof characterised by their position inside the cells
H01M 50/477 - Spacing elements inside cells other than separators, membranes or diaphragmsManufacturing processes thereof characterised by their shape
A power storage device includes a power storage module including a plurality of power storage cells, and a case that accommodates the power storage module. Outer surfaces of the case are respectively provided with depressed portions, which indicate cut portions of the case to be cut when the power storage device is disassembled.
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 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
A power storage device includes a first cell connected body and a second cell connected body electrically connected to each other. The first cell connected body includes a plurality of first power storage cells and a first connection portion that electrically connects the first power storage cells to each other. The second cell connected body includes a plurality of second power storage cells and a second connection portion that electrically connects the second power storage cells to each other. The power storage device further includes a holding member that holds the first power storage cell and the second power storage cell that are opposed to each other. At least a portion of the holding member is located between the first power storage cell and the second power storage cell that are opposed to each other.
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
H01M 50/30 - Arrangements for facilitating escape of gases
H01M 50/474 - Spacing elements inside cells other than separators, membranes or diaphragmsManufacturing processes thereof characterised by their position inside the cells
A power storage device (100) comprises a first cell connection body (10) and a second cell connection body (20) that are electrically connected to each other. Each of the first cell connection body and the second cell connection body includes a plurality of power storage cells, and one or more connection parts that electrically connect adjacent power storage cells among the plurality of power storage cells. Each of the first cell connection body and the second cell connection body is disposed in a first direction (X direction). At least one of the connection parts included in the first cell connection body overlaps with one of the power storage cells of the second cell connection body in a second direction (Y direction) orthogonal to the first direction.
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 50/211 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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 50/289 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by spacing elements or positioning means within frames, racks or packs
H01M 50/293 - 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 the material
H01M 50/502 - Interconnectors for connecting terminals of adjacent batteriesInterconnectors for connecting cells outside a battery casing
A battery includes a case member, a terminal member, and a resin member. The case member has a through-hole. The resin member includes an inner portion that contacts an inner surface of the case member, an inside-hole portion that fills space between a wall of the through-hole and the terminal member, and an outer portion that contacts an outer surface of the case member and has a smaller volume than the inner portion. One of a first condition that the thermal expansion coefficient of the case member is larger than that of the inner portion and the tensile strength of the inner portion is lower than that of the outer portion and a second condition that the thermal expansion coefficient of the case member is smaller than that of the inner portion and the tensile strength of the outer portion is lower than that of the inner portion is satisfied.
H01M 50/198 - Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
H01M 50/103 - Primary casingsJackets or wrappings characterised by their shape or physical structure prismatic or rectangular
H01M 50/188 - Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
H01M 50/588 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
15.
METHOD FOR EVALUATING CONDUCTIVE MATERIAL FOR USE IN RECHARGEABLE BATTERY
A method for evaluating a conductive material for use in a rechargeable battery is provided. The rechargeable battery includes an electrode plate in which a mixture layer, containing an active material and the conductive material, is formed on a substrate. The method includes preparing a paste containing simulated primary particles and the conductive material. The simulated primary particles are formed of an insulative material that simulates the active material of the rechargeable battery. The method further includes applying the prepared paste to a simulated substrate that simulates the substrate of the rechargeable battery, drying the applied paste to prepare a test coating containing the simulated primary particles, and measuring a coating resistance RS (Ω·cm) to evaluate the conductive material. The coating resistance corresponds to a surface resistance of the test coating.
G01N 27/04 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
H01M 4/02 - Electrodes composed of, or comprising, active material
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
16.
Method for Controlling Charging and Discharging of Rechargeable Battery
A method for controlling charging and discharging of a rechargeable battery with a controller includes acquiring a measured current, a measured voltage, and a measured temperature; estimating an estimated voltage based on the measured current and the measured temperature; collecting samples each indicating a difference between the measured voltage and the estimated voltage; classifying the samples into an upper limit side determination sample and a lower limit side determination sample with reference to a reference value; calculating an upper limit error based on at least a predetermined quantity of the upper limit side determination sample, and calculating a lower limit error based on at least a predetermined quantity of the lower limit side determination sample; and resetting an upper limit of a usable SOC range in accordance with the upper limit error, and resetting a lower limit of the usable SOC range in accordance with the lower limit error.
B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
G01R 31/388 - Determining ampere-hour charge capacity or SoC involving voltage measurements
A power storage device includes a case member having a terminal insertion hole, a terminal member inserted through the terminal insertion hole, and a resin member made of an insulating resin material and hermetically adhering to the case member and the terminal member to fix the terminal member to the case member while insulating the members from each other. The terminal member has an encircling band-shaped first roughened portion that has a roughened surface and surrounds the terminal member, and a second roughened portion that is spaced apart from the first roughened portion and has a roughened surface. The resin member is insert-molded integrally with the case member and the terminal member, and has an encircling band-shaped terminal seal portion that hermetically adheres to the first roughened portion, and a stress reducing portion that adheres to the second roughened portion and reduces stress generated in the terminal seal portion.
A non-aqueous rechargeable battery includes a cathode sheet, an anode sheet, and a non-aqueous electrolyte solution. A cathode mixture forming the cathode sheet contains a cathode active material, a fibrous conductive material, a hydroxy-NMP, and a cathode binder. An amount of the hydroxy-NMP present per unit area of the cathode active material is between 0.0026 μg/cm2 and 0.0150 g/cm2, inclusive.
A lithium-ion rechargeable battery includes an electrode body in which a cathode sheet and an anode sheet are stacked with a separator arranged in between. An opposing surface of an anode mixture layer in the anode sheet is greater in size than an opposing surface of a cathode mixture layer in the cathode sheet. The anode mixture layer contains greater than or equal to 1000 ppm and less than or equal to 1500 ppm of lithium in advance. The anode mixture layer has a density of 1.1 g/cc or greater and 1.4 g/cc or less. The cathode mixture layer contains a lithium transition metal oxide as a cathode active material. A Li/M ratio of a number (Li) of atoms of lithium to a sum (M) of a number of atoms of a transition metal in the lithium transition metal oxide is 1.16 or greater and 1.20 or less.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/02 - Electrodes composed of, or comprising, active material
H01M 4/38 - Selection of substances as active materials, active masses, active liquids of elements or alloys
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A non-aqueous rechargeable battery includes an electrode body and a non-aqueous electrolyte solution. The electrode body includes positive and negative electrode plates and a separator. The negative electrode plate includes a substrate and a mixture layer applied to opposite surfaces of the substrate. When A represents a sum of a mass (mg/cm2) of an active material in the mixture layer per unit area on each substrate surface, B represents a lattice volume change amount (nm3) of the active material when the battery is charged from SOC 0% to 100%, C represents a change amount of the load (N) acting on the electrode body if the battery is charged from SOC 0% to 100%, D represents a sum (mm/kN) of a reciprocal of the positive electrode plate spring constant and a reciprocal of the separator spring constant, and E=A×B/(C×D) is satisfied, E is between 0.48 to 0.69, inclusive.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 10/04 - Construction or manufacture in general
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
21.
METAL-RESIN COMPOSITE AND METHOD FOR PRODUCING THE SAME
A battery includes a unit member in which a positive-electrode resin member made of resin is joined to each of a lid and a positive terminal member, which are made of metal. The lid and the positive terminal member are formed, on respective surfaces, with protrusions that have an average diameter of less than 1 μm on a nano-order and are arranged in a densely reticulated arrangement. The resin forming the positive-electrode resin member intrudes into each gap between at least distal ends of the adjacent protrusions, so that the positive-electrode resin member is joined to at least the distal ends of the protrusions.
A battery lid includes an aluminum lid member, a first terminal member made of aluminum and a second terminal member made of copper, each extending to both a front side and a back side, and resin members fixing the terminal members to the lid member. Of the second terminal member, an opposite surface that faces a wall surface between the front side and the back side of the lid member via the resin member is formed with asperities, in which the resin member bites to form a minute anchor structure. The resin member is made of a base resin mixed with fillers and prepared so that its linear expansion coefficient in a range of 80% to 120% of a linear expansion coefficient of the aluminum.
The manufacture method disclosed herein is a method for manufacturing an electrical storage device, including a step of preparing an outer case in which a peripheral part of an opening is a flat surface, and a lid assembly obtained by integral molding of a lid, a terminal member and an insulating member, a step of attaching the lid assembly to the opening of the outer case, and a step of irradiating the boundary of the peripheral part and an outer edge part with laser light. The lid assembly is placed so that an inclined part will become thinner from the outer surface toward the boundary with the outer case, and the outer surface of the lid is placed at a higher place than the peripheral part of the opening, and the inner surface of the lid is placed at a lower place than the peripheral part of the opening.
H01M 50/103 - Primary casingsJackets or wrappings characterised by their shape or physical structure prismatic or rectangular
H01M 50/15 - Lids or covers characterised by their shape for prismatic or rectangular cells
H01M 50/176 - Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
H01M 50/588 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
An electrode body includes a stack of a negative electrode plate, a positive electrode plate, and a separator in which the separator is arranged between the negative electrode plate and the positive electrode plate. The positive electrode plate has a positive electrode density of 3.0 g/cm3 or less. The negative electrode plate has a negative electrode density of 1.3 g/cm3 or less. A ratio of a specific surface area of the positive electrode plate to a specific surface area of the negative electrode plate is 0.7 or greater.
An electrode mixture including an electrode active material, a conductive fibrous carbon material, and inorganic nanoparticles applied to a surface of the electrode active material. The conductive fibrous carbon material contains magnetic metal. A ratio of coverage of the inorganic nanoparticles covering the surface of the electrode active material to content of the magnetic metal contained in the conductive fibrous carbon material is 38.5 or less.
A non-aqueous rechargeable battery includes an electrode body formed by rolling a stack of positive and negative electrode plates with a separator that holds a non-aqueous electrolyte solution disposed in between. The electrode body includes a curved portion in which layers of the electrode body are curved. The positive electrode plate includes a foil of a positive electrode substrate and a positive electrode mixture layer applied to the positive electrode substrate. The negative electrode plate includes a foil of a negative electrode substrate and a negative electrode mixture layer applied to the negative electrode substrate. The negative electrode mixture layer includes a negative electrode active material that intercalates a charge carrier during charging. A coefficient of static friction between the negative electrode mixture layer and the separator is 0.60 or greater. A coefficient of static friction between the positive electrode mixture layer and the separator is 0.50 or less.
H01M 10/04 - Construction or manufacture in general
27.
ELECTRODE BODY FOR NON-AQUEOUS RECHARGEABLE BATTERY, NON-AQUEOUS RECHARGEABLE BATTERY, AND METHOD FOR MANUFACTURING ELECTRODE BODY OF NON-AQUEOUS RECHARGEABLE BATTERY
An electrode body for a non-aqueous rechargeable battery includes a positive electrode substrate and a positive electrode mixture layer. A ratio of a specific surface area of the positive electrode plate to a density of the positive electrode mixture layer is 1.0 to 2.0, inclusive. A ratio of a spring constant of the electrode body to the specific surface area of the positive electrode plate is 30 to 80, inclusive.
A positive electrode plate for a non-aqueous electrolyte rechargeable battery includes a positive electrode mixture layer that is formed by a positive electrode mixture including a positive electrode active material and a conductive material. When RS=(RC×BC)/(RA×BA) is satisfied, where RC (mass %) represents a percentage of the conductive material, BC (m2/g) represents a specific surface area of the conductive material, RA (mass %) represents a percentage of the positive electrode active material, BA (m2/g) represents a specific surface area of the positive electrode active material, and RS represents a total surface area ratio, an aspect ratio AR of the conductive material is thirty or greater, the total surface area ratio RS is in a range of 0.20 to 1.93, and a porosity P (%) of the positive electrode mixture layer is in a range of 40% to 55%.
A non-aqueous electrolyte rechargeable battery includes a positive electrode plate, a negative electrode plate, a separator, and a non-aqueous electrolyte solution. The positive electrode plate includes a current collector, a mixture layer formed on part of at least one surface of the current collector, and an insulating protective layer formed on the at least one surface of the current collector. The insulating protective layer is adjacent to the mixture layer. The insulating protective layer includes an interposed portion located between the mixture layer and the current collector. The insulating protective layer further includes a cavity extending between the interposed portion and the current collector. The cavity is dimensioned to be 3 μm or greater in a thickness direction of the positive electrode plate and in a range of 5 to 100 μm, inclusive, in a widthwise direction of the positive electrode plate.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
A power storage device includes a case having a metal lid with an insertion hole, a terminal member inserted through the insertion hole, and a resin member insulating between the case and the terminal member. The terminal member is made of a flat plate-shaped metal member bent to form an inner terminal part and an outer terminal part including a connection flat surface. The outer terminal part includes an outer main portion extending from an area joined to the inner terminal part to one side in a thickness direction of the inner terminal part, forming over half of the connection flat surface, and an outer protruding portion protruding on the other side in the thickness direction, forming the rest of the connection flat surface. The terminal member has a T-shaped cross-section at a portion including the joined area of the inner and outer terminal parts.
An electrode body includes a substrate serving as a collector, a mixture layer formed on the substrate and containing an electrode active material, and an insulation layer formed on the substrate adjacent to the mixture layer. The insulation layer contains an insulative material. In an interfacial region of the mixture layer and the insulation layer, the mixture layer extends over and overlaps the insulation layer that covers a surface of the substrate. Further, an interfacial surface of the insulation surface interfacing the mixture layer includes undulations having an undulation width that is greater than a particle size of the electrode active material.
H01M 50/586 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulatorsProcesses of manufacture thereof
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 50/59 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
A battery includes: an outer casing accommodating a power generating element; and a terminal member connected thereto and having a terminal surface exposed outside the outer casing. The battery further includes a conductive closing member formed with a through hole for the terminal member, and an insulating sealing resin member closing a gap between the closing member and the terminal member over the entire perimeter of the through hole. The outer surface of the sealing resin member outside the closing member is defined by an outward-facing portion connected to the terminal member and a sloped portion continuous with and more steeply sloped than the outward-facing portion to have a height from an outer surface of the closing member, smaller toward a farther side from the terminal member. Those outward-facing portion and sloped portion are provided outside an outer edge of the terminal surface over the entire perimeter thereof.
A power storage device includes a case having a metal lid with an insertion hole, a terminal member inserted through the insertion hole, and a resin member insulating between the case and the terminal member. The lid has a surface facing outside, including a ring-shaped hole-surrounding region around the insertion hole, to which the resin member is airtightly firmly fixed, and an outer region contacting the resin member. A two-region consisting of two, the hole-surrounding region and the outer region, has a two-region length at a two-region length ratio of 3.0 or more, which is the ratio of the maximum two-region length to the minimum two-region length, and a seal length of 1.4 or less, which is the ratio of the maximum seal length to the minimum seal length of the hole-surrounding region.
H01M 50/588 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
H01M 50/59 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
In an insulating protective layer formed on each of two opposite surfaces of a positive electrode connection portion, a yield stress X (N) of a positive electrode plate is set such that “X≤0.122 N” is satisfied. “MIN≥0.0372 N” is satisfied, where MIN (N) represents a flexural strength of the positive electrode plate including only an inner insulating protective layer formed on a surface of the positive electrode connection portion that is located toward a positive electrode current collector in a stacking direction of an electrode body.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/134 - Electrodes based on metals, Si or alloys
H01M 10/0585 - Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
H01M 50/103 - Primary casingsJackets or wrappings characterised by their shape or physical structure prismatic or rectangular
35.
METHOD FOR PRODUCING POWER STORAGE DEVICE AND POWER STORAGE DEVICE
A method for producing a power storage device includes an insert-molding step in which a resin member is formed by insert molding with a terminal member inserted in an insertion hole of a case member. This insert-molding step is performed using a molding mold that includes a top-surface contact portion which is to face and tightly contact with a terminal top surface of the terminal member, an inner annular flat portion and an outer annular flat portion to form a frame top surface of the resin member, and an annular protruding portion to form an annular groove of the resin member.
A method for producing a power storage device includes an insert-molding step of making a resin member by insert-molding with respect to a terminal member inserted in an insertion hole of a lid. In this insert-molding step, the insertion hole of the lid is placed in front of a gate, and a molten resin is injected through the gate to flow in an opposite gate-side space in a cavity through the insertion hole, allowing the molten resin to spread over the entire cavity, to form the resin member.
H01M 50/564 - Terminals characterised by their manufacturing process
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
H01M 50/103 - Primary casingsJackets or wrappings characterised by their shape or physical structure prismatic or rectangular
H01M 50/15 - Lids or covers characterised by their shape for prismatic or rectangular cells
H01M 50/176 - Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
A method for producing a power storage device includes a process of insert-molding. This process is to relatively move a first mold and a second mold to press a terminal top surface of a terminal member by a top-face close-contact portion of the first mold to a second-mold side and to press a to-be-contacted portion of the terminal member by a contact portion of the second mold to a first-mold side so that a deformed portion of the terminal member is elastically deformed. A resin member is thus insert-molded while the terminal top surface is pressed and tightly contacted with the top-face contact portion.
A state determination device for a lithium-ion rechargeable battery includes a storage device and an execution device. The storage device stores deposition determination mapping data for defining a deposition determination mapping that uses a difference variable as an input variable and outputs information on whether lithium is deposited on a negative electrode of the lithium-ion rechargeable battery. The difference variable indicate information on a difference between a surface concentration of the negative electrode active material and an average concentration of the negative electrode active material in the lithium-ion rechargeable battery. The execution device is configured to execute a determination acquisition process for acquiring a value of the input variable of the deposition determination mapping, and a determination process for determining deposition of lithium by inputting the value of the input variable of the deposition determination mapping to the deposition determination mapping.
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
G01R 31/367 - Software therefor, e.g. for battery testing using modelling or look-up tables
G01R 31/3842 - Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A power storage device includes a case member, a terminal member inserted in an insertion hole of the case member, and a resin member joined to the case member and the terminal member. The resin member includes, on a resin outer surface exposed on an outer side of the case member, at least any one of a recess and a projection portion increasing a creepage distance from a terminal outer surface, which is exposed on the outer side of the case member, of the terminal member to a case outer surface exposed on the outer side of the case member.
In a manufacturing process of a battery or a circuit board, or a printing process, there is a case where a long sheet material is conveyed from an unwinding unit to a winding unit. One object of the present disclosure is to provide a technique capable of preventing the long sheet material from being rubbed by a roller when the material is conveyed. The present disclosure relates to a conveyor adapted for a battery manufacturing process. The conveyor comprises a roller configured to convey a long sheet material, a shaft through the roller; a bearing installed between the roller and the shaft, and a driver configured to rotate the shaft in the same direction as a rotating direction of the roller conveying the long sheet material.
A method for manufacturing a lithium-ion rechargeable battery includes manufacturing a positive electrode plate that includes a positive electrode mixture layer containing a positive electrode active material, lithium hydroxide, and lithium acetate; manufacturing a negative electrode plate that includes a negative electrode mixture layer containing a negative electrode active material and a sodium salt; and injecting a non-aqueous electrolyte solution including LiBOB into a case that accommodates the positive and negative plates. When “A” represents a mole number of the lithium hydroxide added in the manufacturing the positive electrode plate, “B” represents a mole number of the lithium acetate formed in the manufacturing the positive electrode plate, and “C” represents a mole number of the sodium salt added in the manufacturing the negative electrode plate, 0.04≤B/A≤0.06 and 1.9≤B/C are satisfied. Lithium acetate has a higher solubility in the non-aqueous electrolyte solution than sodium acetate.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
A power storage device includes a flat wound electrode body, a case, and a positive terminal ultrasonically welded to a positive current collecting part of the electrode body. A surface-welded portion of a welded portion formed on a laminated current collecting part of the positive current collecting part has an outer periphery of a rectangular shape and corresponds to a virtual surface-welded portion configured such that the virtual surface-welded portion is rotated by 45 degrees or less in a rotation direction in which a closest virtual corner is moved away from an electrode body main part. A distance from a reference position to a closest corner is longer than a virtual distance from the reference position to the closest virtual corner.
A power storage device includes a flat wound electrode body, a case, and a positive terminal ultrasonically welded to a positive current collecting part of the electrode body. A surface-welded portion of a welded portion formed on a laminated current collecting part of the positive current collecting part has an outer periphery including an inner side, an outer side, a closer side and a far side. An outside close endpoint of the outer side is positioned on one side toward a reference position in an electrode widthwise direction with respect to an inside close endpoint of the inner side, and the closer side forms a straight line or a line passing through a region farther from the reference position than the straight line.
H01M 50/566 - Terminals characterised by their manufacturing process by welding, soldering or brazing
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/46 - Separators, membranes or diaphragms characterised by their combination with electrodes
H01M 50/463 - Separators, membranes or diaphragms characterised by their shape
44.
DETERIORATION LEVEL CALCULATION METHOD FOR SECONDARY BATTERY AND NON-TRANSITORY COMPUTER-READABLE MEDIUM STORING DETERIORATION LEVEL CALCULATION PROGRAM
A deterioration level calculation method for a secondary battery of the present disclosure includes: computing a measurement-based measured value charging rate voltage curve of a secondary battery and a theoretical value charging rate voltage curve derived from a component of the secondary battery; computing an evaluation value to evaluate a difference between a measured value and a theoretical value of the charging rate voltage curves by using an evaluation function in which a high charging rate region, a low charging rate region, and a difference evaluation value are weighted higher than a whole difference evaluation value; and outputting, as a parameter indicating a deterioration level, a shift amount in a charting direction applied to the theoretical value charging rate voltage curve when the evaluation value is minimized.
G01R 31/392 - Determining battery ageing or deterioration, e.g. state of health
G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
G01R 31/3835 - Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
45.
METHOD FOR PRODUCING POWER STORAGE DEVICE AND POWER STORAGE DEVICE
A method for producing a power storage device includes forming a lid, forming a lid assembly, closing, and welding. In forming a lid, there is included forming, by forging, a protruding portion between a peripheral portion and an insertion-hole surrounding portion of the lid to block scattered light of a laser beam from being irradiated to a resin member, with a distance D from an end surface of the peripheral portion to a side surface of the protruding portion falling within 0.5t (D≤0.5t) relative to a thickness t of the lid.
A method for producing a power storage device includes placing a lid assembly that includes a lid and a terminal member integrated therewith via a resin member to close an opening portion of a case body with the lid, and laser-welding the opening portion of the case body and the peripheral portion of the lid over an entire circumference. In placing the lid assembly, a peripheral high-level region, in which a peripheral outer surface of the peripheral portion of the lid is located on the outer side relative to an opening end surface of the opening portion of the case body is provided in proximate long-side opening portions, close of the opening portion and proximate long-side peripheral portions of the peripheral portion.
A method for producing a power storage device includes closing an opening portion of a case body with a lid of a lid assembly, and laser-welding the opening portion of the case body and a peripheral portion of the lid over their entire circumference. A resin member has an outer surface including a scattered light-reached surface to which scattered light of a laser beam directly reaches, at least a part of the scattered light-reached surface including a smoothed region having a surface roughness of 0.6 μm or less.
A method for inspecting a power storage device for short circuit includes: adjusting a plurality of power storage devices to a first device voltage; restraining the power storage devices; measuring a pre-leaving device voltage, leaving the power storage devices, and measuring a post-leaving device voltage; obtaining a voltage drop rate; and determining whether or not a restrained device is short-circuited using a voltage drop rate. The method further includes: calculating a largest adjustment timing difference between an oldest adjustment completion time of an oldest adjusted device and a newest adjustment completion time of a newest adjusted device, after adjusting the voltage but before measuring the pre-leaving voltage; obtaining a shortest standby time from the largest adjustment timing difference; and deferring the measuring of the pre-leaving voltage until the shortest standby time elapses.
A method for manufacturing a negative electrode plate of a rechargeable battery is provided. The method includes kneading a negative electrode active material and a negative electrode additive to form a negative electrode mixture paste; applying the negative electrode mixture paste to a negative electrode current collector; and drying the negative electrode mixture paste. The blackness of a material prepared by kneading the negative electrode active material and the negative electrode additive is set in a range of 4 to 16. The viscosity of a negative electrode thickener contained in the negative electrode additive is set in a range of 13000 mPa·s to 21000 mPa·s when a shear rate is 0.01 s−1.
A method of self-discharge test for a battery including an electrode body provided with a positive electrode plate including a positive active material layer and a negative electrode plate including a negative active material layer. The method includes a process of voltage adjusting to adjust a battery voltage to a first battery voltage and a process of self-discharge testing to keep the battery in a terminal open state for a predetermined term and to inspect a state of self-discharge of the battery from variations in the battery voltage occurred during the predetermined term. The voltage adjusting is to adjust the battery voltage to the first battery voltage having magnitude, for which a variation settled time of settling a variation amount of the battery voltage varied by Li diffusion to lessen a concentration gap of an opposing-portion concentration and a non-opposing portion concentration, is set as 17 hours or less.
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
51.
METHOD FOR INSPECTING A POWER STORAGE DEVICE FOR SHORT CIRCUIT, METHOD FOR MANUFACTURING THE POWER STORATE DEVICE, AND METHOD FOR MANUFACTURING A CONNECTED RESTRAINED-DEVICE MODULE
A method for inspecting a battery for short circuit includes: adjusting batteries, which have been subjected to initial charging and subsequent charging and discharging, to a first device voltage; measuring a pre-leaving voltage; leaving the batteries for a leaving period with terminals in an open state; measuring a post-leaving device voltage; actually measuring an actual measured voltage drop rate; determining whether or not each voltage is short-circuited; and, prior to the determining, estimating an estimating voltage drop rate according to an elapsed time and a leaving period. In the determining, it is determined whether or not each battery is short-circuited using the actual voltage drop rate and the estimated voltage drop rate.
G01R 31/52 - Testing for short-circuits, leakage current or ground faults
H01M 10/04 - Construction or manufacture in general
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
52.
Method for inspecting a power storage device, method for manufacturing a power storage device, and method for manufacturing a device stack
A method for inspecting a battery in which an electrode body is accommodated in a case so that the electrode body is insulated from the case by an insulation film includes: adjusting the battery to a first voltage; measuring a first potential difference which is a potential difference between the case and a negative terminal that is exposed outside the case and electrically connected to a negative electrode plate to have a negative-electrode potential; measuring a second potential difference which is a potential difference between the case and the negative electrode plate after a lapse of a standby period of 24 hours or more; and determining whether or not a short circuit exists between the case and the negative electrode plate based on magnitude of the first and second potential differences and a change between the first potential difference and the second potential difference.
A non-aqueous rechargeable battery includes an electrode body in which a positive plate and a negative electrode plate are stacked in a stacking direction with a separator arranged in between. The positive electrode plate includes a positive electrode substrate, and a positive electrode mixture layer and an insulating layer arranged on each of two opposite surfaces of the positive electrode substrate. The positive electrode substrate includes a positive electrode uncoated portion. The electrode body includes a positive electrode current collector portion in which layers of the positive electrode uncoated portion are stacked in the stacking direction. A first insulating layer on a first surface of the positive electrode substrate, facing a center of the positive electrode current collector portion in the stacking direction, has a thickness that is greater than that of a second insulating layer on a second surface of the positive electrode substrate opposite to the first surface.
H01M 10/0585 - Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
A lithium-ion rechargeable battery includes a negative electrode plate including a negative electrode substrate and a negative electrode mixture layer applied to the substrate, a positive electrode plate including a positive electrode substrate and a positive electrode mixture layer applied to the substrate, a separator arranged between the negative electrode plate and the positive electrode plate, and a non-aqueous electrolyte. The negative electrode substrate includes a negative electrode connection portion that projects from the negative electrode mixture layer in a first width direction. The positive electrode substrate includes a positive electrode connection portion that projects from the positive electrode mixture layer in a second width direction. The negative electrode plate has a thickness that increases in the first width direction. The positive electrode plate has a thickness that increases in the second width direction. The separator has a porosity that increases in the second width direction.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulatorsProcesses of manufacture thereof
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
A non-aqueous rechargeable battery includes an electrode body formed by rolling a stack of a positive electrode plate and a negative electrode plate with a separator arranged in between. At least one of the positive electrode plate and the negative electrode plate includes a substrate, a first mixture layer located on an outer side of the substrate, and a second mixture layer located on an inner side of the substrate. The second mixture layer includes an active material having a BET specific surface area that is greater than that of an active material included in the first mixture layer.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
A lithium-ion rechargeable battery includes a negative electrode plate including a negative electrode substrate and a negative electrode mixture layer applied to the substrate, a positive electrode plate including a positive electrode substrate and a positive electrode mixture layer applied to the substrate, a separator arranged between the negative electrode plate and the positive electrode plate, and a non-aqueous electrolyte. The negative electrode substrate includes a negative electrode connection portion that projects from the negative electrode mixture layer in a first width direction. The positive electrode substrate includes a positive electrode connection portion that projects from the positive electrode mixture layer in a second width direction. The separator has a gas permeability that is greater at a portion facing an end of the positive electrode mixture layer in the second width direction than a portion facing an end of the positive electrode mixture layer in the first width direction.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 10/0585 - Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
A coating device includes a backup roll configured to transport a workpiece; a coating die configured to discharge a coating liquid onto the workpiece; a drive section capable configured to drive the backup roll; and a heat dissipation section configured to dissipate heat generated in the drive section.
B05C 5/02 - Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work from an outlet device in contact, or almost in contact, with the work
58.
NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY AND METHOD FOR MANUFACTURING NON-AQUEOUS ELECTROLYTE RECHARGEABLE BATTERY
A non-aqueous electrolyte rechargeable battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode has a sodium concentration of greater than 532 ppm and less than 71100 ppm. The non-aqueous electrolyte rechargeable battery includes a LiBOB equivalent. The LiBOB equivalent is lithium bis(oxalato)borate in the non-aqueous electrolyte or a substance formed when the lithium bis(oxalato)borate reacts with another substance. The non-aqueous electrolyte has a hypothetical concentration of the LiBOB equivalent of 0.35 wt % or greater and 0.56 wt % or less when an amount of the LiBOB equivalent is converted into a weight of the lithium bis(oxalato)borate.
A method for bonding a current collector to an electrode body is provided. The electrode body includes electrode plate end portions arranged over each other in a thickness direction. The method includes forming a covering by integrally covering the electrode plate end portions with resin at a bonding position of the current collector, and bonding a bonding portion of the current collector, by performing solid-phase bonding, to edges of the electrode plate end portions integrated by the formed covering.
H01M 50/536 - Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by 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
In a battery, a terminal member includes: a columnar portion; a head portion, outside an outer casing, having a larger diameter than a through hole of a lid; and an umbrella-shaped portion, more inside than a current collecting member, having a larger diameter than a through hole of the current collecting member to closely contact an inside surface thereof. A gasket includes: a plate-shaped portion between the lid and the head portion; and a cylindrical portion between a wall surface of the through hole of the lid and the columnar portion. An insulator includes: a plate-shaped portion between the lid and the current collecting member; and a cylindrical portion between the wall surface of the through hole of the lid and the columnar portion. Leading ends of the cylindrical portions close contact each other between the wall surface of the through hole of the lid and the columnar portion.
An electrode body of a non-aqueous electrolyte rechargeable battery includes a positive electrode, a negative electrode, and a separator. The negative electrode includes a current collector and an active material layer. The active material layer includes active material particles. The active material particles have a volume distribution including a first peak corresponding to a first particle size and a second peak corresponding to a second particle size smaller than the first particle size. The first particle size is in a range of 7.0 μm to 9.0 μm. The second particle size is in a range of 0.8 μm to 1.0 μm. The separator has a surface roughness of 1.54 μm or greater. A peak ratio of a volume of the active material particles of the second peak to a volume of the active material particles of the first peak is in a range of 0.42 to 0.71.
A battery includes a current collecting member connected to a power generating element housed in an outer casing with a lid, and a rivet placed outside the outer casing. The current collecting member includes a plate-shaped portion placed along the lid. The rivet includes a through part extending through the lid, and a contact part contacting a first surface of the plate-shaped portion. A part of a peripheral end portion of the contact part is joined to the first surface. An edge portion of a non-joined portion of the peripheral end portion, facing the first surface, includes a tapered surface generating a gap smaller at a position closer to the through part. The tapered surface has a maximum size of 0.1 mm or more in a direction from the peripheral end portion to the through part and 0.03 mm or more in a thickness direction of the peripheral end portion.
A battery terminal has a two-piece configuration of different types of conductive materials. A first piece placed outside and a second piece placed inside with including a current collecting portion are fixed in two portions of a first fixing portion and a second fixing portion. The first fixing portion is positioned between the current collecting portion and the second fixing portion in a longitudinal direction in a shape of the terminal. Leaning of the current collecting portion with respect to a center in a short-side direction and leaning of the first fixing portion with respect to a center are opposite to each other.
H01M 50/103 - Primary casingsJackets or wrappings characterised by their shape or physical structure prismatic or rectangular
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
64.
BATTERY PACK CONTROL APPARATUS, BATTERY PACK CONTROL METHOD, AND NON-TRANSITORY COMPUTER RECORDING MEDIUM INCLUDING BATTERY PACK CONTROL PROGRAM
A battery pack control apparatus according to an aspect of the present disclosure includes a plurality of selection switches respectively connected to a lowest voltage node and a highest voltage node of each of a plurality of battery cell groups set for each successive predetermined number of battery cells among the plurality of battery cells, a battery selection control unit configured to control on and off of the plurality of selection switches so as to select the battery cell group including the battery cell whose characteristic variation is large compared to those of other battery cells, and a low-voltage output unit configured to use the battery cell group selected by the battery selection control unit to output low-voltage power with a voltage value lower than that of the high-voltage power.
B60W 10/26 - Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
B60L 58/16 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
B60L 58/20 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
POSITIVE PLATE FOR NONAQUEOUS RECHARGEABLE BATTERY, NONAQUEOUS RECHARGEABLE BATTERY, METHOD OF MANUFACTURING POSITIVE PLATE FOR NONAQUEOUS RECHARGEABLE BATTERY, AND METHOD OF MANUFACTURING NONAQUEOUS RECHARGEABLE BATTERY
A positive plate for a nonaqueous rechargeable battery includes a positive electrode substrate and a positive electrode mixture layer that contains at least a positive electrode active material. Particles of the positive electrode active material having a specific surface area of a range of 1.5 m2/g to 3.0 m2/g prior to manufacture of the positive plate for the nonaqueous rechargeable battery are used. A difference between a specific surface area of the positive plate for the nonaqueous rechargeable battery after manufacturing the positive plate for the nonaqueous rechargeable battery and the specific surface area of the particles of the positive electrode active material prior to manufacture of the positive plate for the nonaqueous rechargeable battery is in a range of 0.66 m2/g to 1.8 m2/g.
A non-aqueous electrolyte rechargeable battery includes an electrode body, a negative electrode current collector, and a positive electrode current collector. The electrode body includes a stack of a negative electrode sheet, a positive electrode sheet, and a separator. The negative electrode sheet includes a negative electrode base, a negative electrode mixture layer, and a negative electrode connecting portion. The positive electrode sheet includes a positive electrode base, a positive electrode mixture layer, a positive electrode connecting portion, and an insulating protective layer. The insulating protective layer includes an outer insulating protective layer on a surface relatively far from the positive electrode current collector in a stacking direction of the electrode body and an inner insulating protective layer on a surface relatively close to the positive electrode current collector in the direction. The outer insulating protective layer has a larger thickness than the inner insulating protective layer.
A method for joining a current collector includes (1) providing an electrode body that includes electrode plate end portions overlapping each other in a thickness-wise direction of the electrode plate end portions, (2) providing a current collector including a folded portion, where the folded portion includes two opposing holding walls that hold the electrode plate end portions of the electrode body in between, and a top part that connects the two holding walls and includes an opening, and (3) brazing edges of the electrode plate end portions, exposed from the opening of the top part, to the two holding walls to join the current collector to the electrode body.
A method for manufacturing a battery pack includes forming a positive electrode plate; forming a negative electrode plate; forming an electrode body; forming a battery cell; applying a binding load to battery cells; and initially charging the battery cells. When “A mg/cm2” represents a mass of a positive electrode active material on the positive electrode substrate, “C cm3/cm2” represents a volume of pores in the positive electrode substrate, “B mg/cm2” represents a mass of a negative electrode active material on the negative electrode substrate, “D cm3/cm2” represents a volume of pores in the negative electrode substrate, “E cm3/cm2” represents a volume of pores in the separator, and “F N/mm2” represents pressure applied to an opposing portion of a case of the electrode body facing a flat surface of the electrode body, a value of (A+B)/{(C+D+E)/F} is between 1300 and 3000, inclusive.
A roll exchange mechanism for a reduction roll apparatus, capable of contributing to simplifying work for replacing a roller is provided. A roll exchange mechanism for a reduction roll apparatus according to the present disclosure includes a rail member disposed parallel to a rotation shaft of a roller of the reduction roll apparatus, a placement part disposed in a support frame of a roll unit and configured to be placed on the rail member, a receiving part disposed in an apparatus frame of the reduction roll apparatus and configured so that the rail member is placed thereon, and an opening formed in the apparatus frame of the reduction roll apparatus and configured so that the roll unit can be inserted therein and removed therefrom.
An inspection apparatus includes a support, an image capturing unit, and a controller. The support supports a workpiece. The image capturing unit generates captured image data including an image of the workpiece. The controller executes image processing on the captured image data to evaluate the workpiece. The support includes an engraved portion, including a groove and serving as a reference for inspection, on a surface of the support in a non-contact region that is free from contact with the workpiece. The engraved portion is included in an image capturing range of the image capturing unit. The controller evaluates the workpiece using a dimension of the engraved portion that is stored in the controller in advance and a reference image that is an image of the engraved portion.
In a sealed battery provided with an electrode body and a battery case accommodating the electrode body, the battery case includes a case body having an opening and accommodating the electrode body, and a plate-shaped lid closing the opening of the case body. The lid includes a safety valve made of resin. The safety valve is formed with a ring-shaped groove that is recessed in a thickness direction of the lid and has a ring shape in plan view. In the safety valve, a thinnest portion having a thinnest thickness in the safety valve includes a ring-shaped thinnest portion of a ring shape in plan view including the bottom of the ring-shaped groove.
A method for evaluating a connection resistance between a positive current collecting part of an electrode body of a battery and a positive inner terminal member connected thereto includes: changing a power storage device with a first battery voltage by CCCV charging or CCCV discharging into a second battery voltage; obtaining an evaluation value for evaluating the connection resistance by use of at least two values of the following values: CC electric quantity, CV electric quantity, CCCV electric quantity, CC time, CV time, CCCV time, and CV termination current value of the power storage device; and evaluating a connection resistance of the power storage device based on the evaluation value.
A measurement method includes a step of measuring an object to be measured and a reference object by a first measurement unit and a second measurement unit. The first measurement unit has a first displacement meter and a second displacement meter that face each other in a first direction and measure the distance from the object to be measured. The second measurement unit has a third displacement meter and a fourth displacement meter that face each other in the first direction and measure the distance from the reference object. A frame-like supporting member includes a first frame portion supporting the first displacement meter and the third displacement meter, a second frame portion supporting the second displacement meter and the fourth displacement meter, and a third frame portion and a fourth frame portion that connect both end portions of the first frame portion and the second frame portion to each other.
G01B 5/14 - Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
G01B 3/00 - Measuring instruments characterised by the use of mechanical techniques
A joining method includes providing an electrode body that includes electrode plate end portions overlapping each other in a thickness-wise direction of the electrode plate end portions; providing a current collector including a folded portion, the folded portion includes two opposing holding walls that hold the electrode plate end portions of the electrode body in between, and a top portion that connects the two holding walls and includes an opening; and welding the electrode plate end portions to end surfaces of the two holding walls that define the opening by irradiating an edge of the electrode plate end portions with a laser beam in a state in which the edge of the electrode plate end portions held between the two holding walls projects into the opening.
A positive electrode plate for a lithium-ion rechargeable battery includes a positive electrode mixture layer. In the positive electrode mixture layer, a fibrous conductor is combined with a positive electrode active material in which an amount of lithium carbonate with respect to the positive electrode active material is between 0.31 wt % and 1.29 wt %, inclusive. A composition ratio of the fibrous conductor to the positive electrode active material is between 0.5 wt % and 2.0 wt %, inclusive. A coverage of the fibrous conductor to the positive electrode active material is 11.0% or less.
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 4/583 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
76.
NONAQUEOUS ELECTROLYTE RECHARGEABLE BATTERY AND METHOD FOR MANUFACTURING POSITIVE ELECTRODE PLATE OF NONAQUEOUS ELECTROLYTE RECHARGEABLE BATTERY
A nonaqueous electrolyte rechargeable battery includes a positive electrode plate, a negative electrode plate, a separator, and a nonaqueous electrolyte. The positive electrode plate includes a positive electrode current collector, a positive electrode mixture layer including positive electrode active material particles and a conductor, and an insulative protection layer including insulative particles and a binder. In the insulative protection layer, a value of (the insulative particles)/(the insulative particles+the binder) is between 75 wt % and 85 wt %, inclusive. A single-surface thickness TI of the insulative protection layer is between 3.0 μm and 15 μm, inclusive. A porosity PI of the insulative protection layer is between 42% and 55%, inclusive. A ratio of the single-surface thickness TI to a single-surface thickness TP of the positive electrode mixture layer is between 0.12 and 0.80, inclusive.
A non-aqueous rechargeable battery includes an electrode body, a non-aqueous electrolyte solution, and a battery case. The electrode body includes a negative electrode plate, a positive electrode plate, and a separator arranged between the negative and positive electrode plates. The battery case accommodates the electrode body and the non-aqueous electrolyte solution. The positive electrode plate includes a positive electrode substrate and a positive electrode mixture layer arranged on the positive electrode substrate. The positive electrode mixture layer is formed by applying a positive electrode mixture paste, containing at least a positive electrode active material and an organic solvent, to the positive electrode substrate and drying the positive electrode mixture paste so that the organic solvent remains in the positive electrode mixture layer. The non-aqueous rechargeable battery is charged in a state in which the electrode body and the non-aqueous electrolyte solution are accommodated in the battery case.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/103 - Primary casingsJackets or wrappings characterised by their shape or physical structure prismatic or rectangular
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulatorsProcesses of manufacture thereof
H01M 50/538 - Connection of several leads or tabs of wound or folded electrode stacks
H01M 10/0569 - Liquid materials characterised by the solvents
In a sealed battery, a battery case includes a metal wall portion formed with a gas vent hole. Of an outer surface of the metal wall portion, a hole-surrounding annular surface surrounding an opening edge of the gas vent hole includes an annular seal surface surrounding the opening edge of the gas vent hole. A resin safety valve member covering and closing the the gas vent hole includes an annular joined portion hermetically joined to the annular seal surface. The annular joined portion of the resin safety valve breaks when the internal pressure of the battery case reaches a valve opening pressure, thereby opening the resin safety valve member.
In a sealed power storage device, a device case includes a resin case body with an opening and a resin lid closing the opening. The resin lid is made of electrical insulation resin. A metal terminal member is extended from inside to outside of the device case, penetrating through the resin lid. The resin lid is hermetically molded together with the metal terminal member so that the resin lid is directly joined to the outer peripheral surface of the metal terminal member without interposing another member between the resin lid and the metal terminal member.
In a sealed battery, a battery case includes a metal wall portion formed with a gas vent hole. The metal wall portion includes an annular seal surface surrounding an opening edge of the gas vent hole. A resin safety valve member closing the gas vent hole includes an annular joined portion hermetically joined to the annular seal surface and an inside portion located more inside than the annular joined portion in a radial direction. The inside portion breaks when the internal pressure of the battery case reaches a valve opening pressure, thereby opening the resin safety valve member.
A sealed power storage device includes a device case having a metal wall portion formed with liquid inlet, and a sealing member sealing the liquid inlet to cover the liquid inlet from above an outer surface of the metal wall portion. The sealing member is a resin sealing member made of resin. The outer surface of the metal wall portion includes an annular seal surface surrounding an opening edge of the liquid inlet. The resin sealing member includes an annular joined portion hermetically joined to the annular seal surface.
A method for manufacturing a rechargeable battery including applying an electrode mixture that includes an electrode active material to a substrate that becomes a current collector, drying the applied electrode mixture, obtaining a specific surface area of the electrode active material before the drying the applied electrode mixture, in which the obtained specific surface area of the electrode active material is referred to as an obtained specific surface area, and a specific surface area of the electrode active material in a state in which the electrode mixture applied to the substrate forms an electrode plate is referred to as an electrode plate specific surface area; and adjusting the electrode plate specific surface area after the drying the applied electrode mixture by setting a drying condition of the electrode mixture in accordance with the obtained specific surface area.
A battery pack includes battery cells and a spacer arranged between two adjacent battery cells. Each battery cell includes an electrode body and a case. The electrode body includes an upper curved portion, a flat portion, and a lower curved portion. The spacer presses one side wall of the case of one of the adjacent battery cells toward an inner side of the case at a part where the side wall opposes a region from the upper curved portion to the lower curved portion. The spacer forms passages for cooling air between the spacer and the side wall. A first cooling efficiency of the cooling air per unit area at a first opposing portion of the side wall that opposes the upper curved portion is less than a second cooling efficiency per unit area at a second opposing portion of the side wall that opposes the flat portion.
H01M 10/6566 - Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
H01M 50/209 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
H01M 50/291 - 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
H01M 50/538 - Connection of several leads or tabs of wound or folded electrode stacks
A producing method for a positive electrode plate includes a positive electrode paste preparing process of preparing a positive electrode paste including carbon nanotubes, positive active material particles, and a solvent, a coating process of coating the positive electrode paste on a surface of a current collector to form a positive electrode paste layer on the surface of the current collector, and a drying process of drying the positive electrode paste layer to form a positive electrode mixture layer. The carbon nanotubes have the characteristics of being attracted by magnets, and the carbon nanotubes included in the positive electrode paste layer are attracted toward a side of the current collector by the magnets at least any one of directly before the drying process or during the drying process.
A producing method for a positive electrode plate includes a second coating process of coating a second positive electrode paste on either a surface of a first positive electrode paste layer which is formed on a current collector or a surface of a positive electrode mixture layer that has been formed by drying the first positive electrode paste layer, a drying process of drying the first positive electrode paste layer with the second positive electrode paste layer or a drying process having a first step of drying the first positive electrode paste layer to form the first positive electrode mixture layer and a second step of drying the second positive electrode paste layer coated on the surface of the first positive electrode mixture layer to form the positive electrode mixture layer. An average length of first carbon nanotubes is longer than an average length of second carbon nanotubes.
An optical axis adjustment jig includes a main unit portion that is configured to be disposed between a pair of head units, and is fashioned in a flat plate shape. The main unit portion includes a reference portion for adjusting a distance between the head units, and an inclination of an optical axis of each of the head units, and a screen portion for aligning the optical axes of the head units. The reference portion and the screen portion are disposed arrayed in a direction orthogonal to a thickness direction of the main unit portion.
A battery pack includes battery cells and a spacer. Each battery cell includes an electrode body and a case accommodating the electrode body in a state sealed by a sealing portion. The battery cells are arranged in an arrangement direction. The spacer is arranged between the case of one of the battery cells and the case of an adjacent battery cell. The battery cells are bound together in a state in which a binding pressure is applied to the battery cells. The electrode body includes a flat portion. The spacer includes a base plate and projections projecting from the base plate toward the case of the adjacent battery cell. The projections include a top projection that presses the case of the adjacent battery cell at a position located upward from an upper edge of the flat portion where the sealing portion is the closest.
To provide a rechargeable battery that limits damage to a separator, a positive connector is configured to be bent at an acute angle in a thickness-wise direction in a bending region, which is defined between a first position and a second position, on a boundary position between a flat surface region and a second position in a longitudinal direction. The first position is a position at which a second distal end of a negative plate is disposed. The second position is a position separated from a third position, at which a first distal end of a separator is disposed, by a thickness of a positive mixture layer in a second width-wise direction.
The nonaqueous electrolyte secondary battery herein disclosed includes a nonaqueous electrolyte, a wound electrode assembly, and a battery case accommodating them. The wound electrode assembly includes a pair of flat surface parts and a pair of R parts. In a state where 4.5 kN restriction pressure is added from a thickness direction so as to restrict the wound electrode assembly, when a total of outermost circumferential lengths of the pair of R parts of the wound electrode assembly on a cross section orthogonal to the winding axis of the wound electrode assembly is treated as a (mm), an outermost circumferential length of the cross section is treated as b (mm), a width of the positive electrode active material layer is treated as c (mm), and a height of the wound electrode assembly of the cross section is treated as d (mm), both 0.282
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 10/0585 - Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulatorsProcesses of manufacture thereof
H01M 50/11 - Primary casingsJackets or wrappings characterised by their shape or physical structure having a chip structure, e.g. micro-sized batteries integrated on chips
An electrode mixture includes an electrode active material and a carbon nanotube as a conductive fibrous carbon material. The electrode mixture includes an inorganic nanoparticle disposed on a surface of the electrode active material.
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
A lithium-ion rechargeable battery includes a positive electrode mixture that includes a positive electrode active material and a lithium salt. The lithium salt reacts with hydrogen fluoride generated in an electrolytic solution to produce an organic acid that is a weak acid relative to the hydrogen fluoride, an acid dissociation constant of the organic acid being 3.15 or higher.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
92.
METHOD FOR MANUFACTURING SLURRY FOR INSULATION PROTECTIVE LAYER OF RECHARGEABLE BATTERY AND DEVICE FOR MANUFACTURING SLURRY FOR INSULATION PROTECTIVE LAYER OF RECHARGEABLE BATTERY
A method for manufacturing slurry for an insulation protective layer of a rechargeable battery includes obtaining an insulation material calibration curve showing a relationship between particle size and compressibility of an insulation material using sets of particle size and compressibility of the insulation material, obtaining a binder calibration curve showing a relationship between particle size and compressibility of a binder using sets of particle size and compressibility of the binder, measuring particle sizes of the insulation material and the binder loaded, determining an optimal mixture weight ratio with reference to the curves so that compressibility of mixture powder of the insulation material and the binder equals a set compressibility based on the measured particle sizes, mixing the insulation material and the binder at the determined mixture weight ratio to form mixture powder, loading the mixture powder into a powder dispenser, and adding a solvent to the mixture powder.
An apparatus for manufacturing an electrode body includes a coater and an attraction magnet. The coater applies a mixture paste including an electrode active material to a substrate that is configured to be a current collector. The attraction magnet is opposed to an applied layer of the mixture paste formed on the substrate so that when the mixture paste contains a metal object, the attraction magnet attracts the metal object so as to change a shape of a surface of the applied layer.
B05C 5/02 - Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work from an outlet device in contact, or almost in contact, with the work
B05C 9/12 - 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 being performed after the application
In a secondary battery, a lid member and a negative terminal are integrated through a resin. The negative terminal includes a first member and a second member. A first bonded surface of a lower surface of the first member is bonded to a second bonded surface of an upper surface of the second member. The first member includes a projecting portion at an outer peripheral edge of the lower surface of the first member. The second member includes a chamfered portion at an outer peripheral edge of the upper surface of the second member. The projecting portion and the chamfered portion are combined with each other so that the projecting portion contacts the chamfered portion.
H01M 50/15 - Lids or covers characterised by their shape for prismatic or rectangular cells
H01M 50/186 - Sealing members characterised by the disposition of the sealing members
H01M 50/505 - Interconnectors for connecting terminals of adjacent batteriesInterconnectors for connecting cells outside a battery casing comprising a single busbar
An ultrasonic welding method includes welding workpieces by applying ultrasonic vibration to the workpieces, wherein in the welding, the workpieces are vibrated at an amplitude smaller than an amplitude of the ultrasonic vibration.
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
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
A method for producing a negative electrode active material realizing both of improvement in tolerance against the deposition of lithium and improvement in life performance is provided. A method for producing a negative electrode active material includes the steps of preparing graphite particles having a BET specific surface area of 10.3 m2/g or larger and 12.2 m2/g or smaller; and coating at least a part of a surface of the graphite particles with amorphous carbon. In the step of coating, at least the part of the surface of the graphite particles is coated with the amorphous carbon such that a value obtained by subtracting a BET specific surface area of the negative electrode active material from a BET specific surface area of the graphite particles is 6.9 m2/g or larger and 8.3 m2/g or smaller.
A lithium-ion battery includes a positive electrode, which includes positive electrode mixture material containing positive electrode active material particles and conductive material, a negative electrode, which includes a negative electrode mixture material, and an electrolyte. The positive electrode active material particles include primary particles, a first particle aggregate of the primary particles cohered into a mass with a hollow portion having a diameter of less than 1 μm, and a second particle aggregate of the primary particles cohered into a mass with a hollow portion having a diameter of 1 μm or greater. When referring to the primary particles and the first particle aggregate as first particles, the first particles occupy 5% to 70% of the positive electrode active material particles. The positive electrode mixture material has a void percentage of 20% to 60%. The conductive material has an aspect ratio of 1:10 or greater.
A manufacturing system for a battery pack includes a front-half unit that applies a first pressure to press a stack in a single direction for a certain period of time and a rear-half unit that then causes a restraining member to restrain the stack while applying a second pressure smaller than the first pressure to press the stack in the single direction. The front-half unit includes a front-half pressure application portion that presses the stack and a front-half restriction portion that restricts a position of the stack. The front-half pressure application portion presses the stack with the front-half restriction portion in contact with the stack. The rear-half unit includes a rear-half pressure application portion that presses the stack and a rear-half restriction portion that restricts the position of the stack. The rear-half pressure application portion presses the stack with the front-half or rear-half restriction portion in contact with the stack.
H01M 50/264 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
H01M 50/209 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
H01M 10/04 - Construction or manufacture in general
A method for manufacturing a cell includes the steps of: preparing a housing portion having an opening; preparing a lid portion that includes a plate portion, a first external terminal located on the plate portion, and a second external terminal located on the plate portion at a position away from the first external terminal; placing the lid portion in the housing portion in such a manner that the plate portion closes the opening; placing a jig on an inter-terminal region of the plate portion that is located between the first external terminal and the second external terminal; and sealing the opening by joining the plate portion with the jig placed thereon and the housing portion together by welding.
An electrode body includes a substrate serving as a collector, a composite layer formed by applying a composite paste including an electrode active material to the substrate, and an insulation layer formed by applying an insulation paste including an insulative material to the substrate adjacent to the composite layer. The composite layer extends above and overlaps the insulation layer that covers a surface of the substrate in an interface region of the composite layer and the insulation layer. A mixed layer is formed between the insulation layer and the composite layer when the composite paste and the insulation paste mix in an overlapping range of the insulation layer and the composite layer. The mixed layer is formed in a range where the insulation layer covers the surface of the substrate.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 50/586 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
H01M 50/59 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
