Abstract

A battery housing structure and a button battery. The battery housing structure comprises an upper cover and a bottom housing; the bottom housing mates with the upper cover to form a sealing cavity; the sealing cavity is used for mounting of a cell assembly; the bottom housing is provided with a first blind groove. The button battery comprises the cell assembly and the battery housing structure, and the cell assembly is provided in the sealing cavity.

IPC Classes  ?

• H01M 50/342 - Non-re-sealable arrangements
• H01M 50/153 - Lids or covers characterised by their shape for button or coin cells
• H01M 50/109 - Primary casingsJackets or wrappings characterised by their shape or physical structure of button or coin shape
• H01M 50/186 - Sealing members characterised by the disposition of the sealing members
• H01M 50/184 - Sealing members characterised by their shape or structure

Abstract

A button battery, comprising a pole assembly unit which comprises a first winding core, a first tab, and a first current collector; the first winding core comprises a first electrode layer, a second electrode layer, and a first separator sandwiched between the adjacent first electrode layer and second electrode layer, the polarities of the first electrode layer and second electrode layer being opposite to each other. The button battery also comprises a battery housing, a battery cover, and an insulating sealing ring; the battery housing forms a sealed cavity with the battery cover by means of the sealing ring; an electrolyte is stored within the sealed cavity; the pole assembly unit is disposed within the sealed cavity; and the first electrode layer is electrically connected to the battery cover by the first tab, and the second electrode layer is electrically connected to the battery housing by the first current collector.

IPC Classes  ?

• H01M 50/538 - Connection of several leads or tabs of wound or folded electrode stacks
• H01M 50/109 - Primary casingsJackets or wrappings characterised by their shape or physical structure of button or coin shape
• H01M 50/166 - Lids or covers characterised by the methods of assembling casings with lids
• H01M 50/184 - Sealing members characterised by their shape or structure
• H01M 50/545 - Terminals formed by the casing of the cells
• H01M 50/566 - Terminals characterised by their manufacturing process by welding, soldering or brazing

Abstract

A button battery, a battery sealing structure, and a pre-assembly unit. The pre-assembly unit comprises a casing, a sealing ring, and a battery cover. The casing is provided with an accommodating cavity. The casing comprises an annular receiving member, and a limiting member protrudingly arranged on the receiving member, the receiving member is sleeved on an outer side of the accommodating cavity, and arranged at a port of the accommodating cavity, and the limiting member is in the shape of a ring and is arranged on an outer side of the accommodating cavity. The sealing ring comprises a first annular member arranged above the receiving member, and the battery cover is arranged above the first annular member. The limiting member is provided with a bendable portion arranged above the battery cover.

IPC Classes  ?

• H01M 50/186 - Sealing members characterised by the disposition of the sealing members
• H01M 50/109 - Primary casingsJackets or wrappings characterised by their shape or physical structure of button or coin shape
• H01M 50/153 - Lids or covers characterised by their shape for button or coin cells

Abstract

A battery housing structure and a button battery. The battery housing structure comprises an upper cover (200) and a bottom housing (100); the bottom housing (100) mates with the upper cover (200) to form a sealing cavity; the sealing cavity is used for mounting of a cell assembly (400); the bottom housing (100) is provided with a first blind groove (1311). The button battery comprises the cell assembly (400) and the battery housing structure, and the cell assembly (400) is provided in the sealing cavity. In the battery housing structure, the upper cover (200) mates with the bottom housing (100) to form the sealing cavity to provide a mounting space for the cell assembly (400); moreover, the first blind groove (1311) is provided on the bottom housing (100); due to the first blind groove (1311), the wall of the area where the first blind groove (1311) is located is thinner than the wall in other areas, and therefore can be broken first under the action of high-pressure gas when the battery fails or is scrapped, so as to form a pressure relief port to avoid the explosion of the battery due to incapability of releasing the high-pressure gas, thereby ensuring the safety. The button battery comprises the battery housing structure, and can realize pressure relief and explosion prevention by using the first blind groove (1311), thereby ensuring the safety.

IPC Classes  ?

• H01M 50/342 - Non-re-sealable arrangements
• H01M 50/30 - Arrangements for facilitating escape of gases
• H01M 50/109 - Primary casingsJackets or wrappings characterised by their shape or physical structure of button or coin shape

Abstract

Disclosed is a button battery, comprising a pole assembly unit which comprises a first winding core, a first tab, and a first current collector; the first winding core comprises a first electrode layer, a second electrode layer, and a first separator sandwiched between the adjacent first electrode layer and second electrode layer, the properties of the first electrode layer and second electrode layer being opposite to each other. The button battery also comprises a battery housing, a battery cover, and an insulating sealing ring; the battery housing forms a sealed cavity with the battery cover by means of the sealing ring; an electrolyte is stored within the sealed cavity; the pole assembly unit is disposed within the sealed cavity; and the first electrode layer is electrically connected to the battery cover by means of the first tab, and the second electrode layer is electrically connected to the battery housing by means of the first current collector. With regards to the button battery, the contact area can be increased, which helps to improve the charging and discharging performance, and the stability of the operation of the battery is increased.

IPC Classes  ?

• H01M 50/109 - Primary casingsJackets or wrappings characterised by their shape or physical structure of button or coin shape
• H01M 50/153 - Lids or covers characterised by their shape for button or coin cells

Abstract

A button battery, a battery sealing structure, and a pre-assembly unit. The pre-assembly unit comprises a casing (100), a sealing ring (200), and a battery cover (300). The casing (100) is provided with an accommodating cavity (110). The casing (100) comprises an annular receiving member (120), and a limiting member (130) protrudingly arranged on the receiving member (120), the receiving member (120) is sleeved on an outer side of the accommodating cavity (110), and arranged at a port of the accommodating cavity (110), and the limiting member (130) is in the shape of a ring and is arranged on an outer side of the accommodating cavity (110). The sealing ring (200) comprises a first annular member (210) arranged above the receiving member (120), and the battery cover (300) is arranged above the first annular member (210). The limiting member (130) is provided with a bendable portion (132) arranged above the battery cover (300). The button battery, the battery sealing structure, and the pre-assembly unit can optimize the sealing structure of the battery, reduce manufacturing costs, and help improve the space utilization rate of the casing (100).

IPC Classes  ?

• H01M 50/153 - Lids or covers characterised by their shape for button or coin cells
• H01M 50/184 - Sealing members characterised by their shape or structure