Abstract: Provided are a core cell stack assembly and a stacking method therefor, and a battery. The core cell stack assembly includes a positive electrode sheet, a negative electrode sheet, and a separator located between the positive electrode sheet and the negative electrode sheet in a thickness direction of the core cell stack assembly. An edge of the separator is flush with an edge of the negative electrode sheet and extends beyond an edge of the positive electrode sheet on at least one end of each of the positive electrode sheet, the negative electrode sheet, and the separator.

Abstract: A cell includes a housing, an electrode core and a cover plate assembly. The electrode core is disposed within the housing, and the cover plate assembly is configured to close an opening of the housing. The cover plate assembly includes a support body, a groove is provided in the support body, and the area formed and enclosed by the inner ring of the groove is defined as S, where S satisfies: S=(K×C)/(T×V). K is a gas production coefficient of the electrode core, C is a capacity of the electrode core; T is pressure-relief time; and V is a pressure-relief speed.

Abstract: Disclosed herein are a battery top cover, a process for assembling a battery top cover, and a power battery. The battery top cover comprises a cover assembly, a post and a pressing block. The post passes through the cover assembly and then is engaged with a mounting hole of the pressing block, a welding groove is formed on a surface of the pressing block, the welding groove is communicated with a peripheral side of the mounting hole, the post and the pressing block are fixed by welding, and the pressing block and the post respectively abut against opposite sides of the cover assembly.

Abstract: A battery terminal post, a battery top cover and a battery cell. The battery terminal post is integrally formed by means of a cold heading process and comprises a chassis and a terminal post body, which are connected to each other, a first groove being formed on a top portion of the terminal post body, wherein the minimum distance between a groove wall of the first groove and an outer side wall of the terminal post body is C, a distance between a groove bottom of the first groove and the chassis is D, an included angle between the groove wall of the first groove and an axis of the first groove is E, and a groove depth of the first groove is F, FtanE +C being greater than or equal to D.

Abstract: Provided are a battery, and a top cover assembly including a top cover sheet, a pole and a connecting block. The top cover sheet includes a mounting hole. The pole includes a body and a boss provided on the body. The body is insulatively connected to a lower end of the top cover sheet. The boss passes through the mounting hole and insulatively connects to the top cover sheet. An outer peripheral edge of an upper end of the boss includes a first notch. The connecting block is insulatively connected to an upper end of the top cover sheet. The connecting block is provided with a connecting hole. The upper end of the boss is inserted into the connecting hole. An upper end of a wall of the connecting hole is provided with a second notch circumferentially. The first notch and the second notch form a welding recess.

Abstract: The application discloses a battery cell. The battery cell includes a top cover assembly, two cell packs and pins; the two cell packs are arranged side by side along a first direction, and tabs are respectively provided at two ends of each of the cell packs along a second direction; the pins are each include a first connection portion and a second connection portion; the first connection portion is connected to the top cover assembly, and the second connection portion includes two welding plates that are arranged at an interval and are perpendicular to the first direction, and two of the tabs of the two cell packs located on a same side are respectively connected to sides of the two welding plates facing away from each other, and a distance between surfaces of the two welding plates facing away from each other along the first direction is d.

Abstract: A pole (4), a top cover structure (100), a battery (1000), a battery module and a battery pack are provided. The pole includes a first metal pillar (41) and a second metal pillar (42) connected to each other. One end of the first metal pillar (41) is provided with a heading groove (411), and the other end of the first metal pillar (41) opposite to the first end is provided with a protruding portion (412). The second metal pillar (42) is provided with a recessed portion (421) recessed in a direction away from the heading groove (411). The protruding portion (412) is embedded in the recessed portion (421) to form a joint surface (43).

Abstract: A power battery cover is provided. A terminal pressing block of the power battery cover is arranged above a top cover sheet, a pole bottom plate is arranged below the top cover sheet, a copper-aluminum composite plate is formed into composite poles by means of a cold heading or stamping process, and a copper base part is connected to the pole bottom plate by laser welding. Each composite pole sequentially passes through the terminal pressing block, the top cover sheet and the pole bottom plate from top to bottom, a sealing member is sleeved on the composite pole and covers a composite connection surface between an aluminum base part and the copper base part in a sealing manner. The processing steps of the composite pole are less, and the assembly steps and assembly methods are simplified, which improves the processing efficiency and greatly reduces the cost.

Abstract: A terminal, a top cover structure, a battery cell, a battery module, and a battery pack are disclosed, and the present application relates to the technical field of batteries, and. The terminal includes a first metal part and a second metal part connected to each other. a protruding portion is arranged at one of the first metal part and the second metal part, a first recessed portion is arranged at another one, the protruding portion is connected to the first recessed portion in an embedded manner; and an edge of one end of the second metal part extends outward to form an extension edge, a second recessed portion is arranged at the first metal part, the extension edge is embedded in the second recessed portion.

Abstract: Provided is a battery insulator, a top cover assembly, and a battery. The battery insulator includes a first member and a second member. The first member includes a first main body, an end of the first main body facing towards the second member is provided with two baffles at intervals. The second member includes a second main body, and an end of the second main body facing towards the first main body is provided with a mounting plate. The mounting plate is provided with a first pole hole in a penetrating manner, the first pole hole is configured to allow a pole of a battery to pass through, the mounting plate is movably disposed between the two baffles, the mounting plate and the two baffles define an accommodation groove, and the accommodation groove is configured to accommodate a tab connected to the cell.

Abstract: A battery liquid injection structure, a battery and a battery pack are provided. The battery liquid injection structure includes a top cover piece and a sealing member. The top cover piece is provided with a liquid injection portion, and a core of the battery is below the liquid injection portion. The liquid injection portion is provided with a liquid injection hole arranged obliquely. The sealing member is sealingly inserted in the liquid injection hole.

Abstract: The disclosure provides a cover plate, a cover plate assembly, a battery housing, a battery module, and a battery pack. The cover plate includes a body portion and a first boss. The body portion has a thickness D1, and 0.8 mm?D1?1.5 mm. The first boss protrudes from one side of the body portion. The first boss is provided with a liquid injection hole communicating with a through hole of an insulating plate. Another side of the body portion is provided with a first concavity corresponding to the first boss. The cover plate has a thickness D2 at the first boss, and 0.8 mm?D2?1.5 mm.

Abstract: This application discloses a housing, a housing assembly and a battery. The housing includes an insulating base body and a metal frame. The insulating base body has an accommodation cavity. The insulating base body has a mounting side surface. An opening in communication with the accommodation cavity is defined by the mounting side surface. The metal frame is provided around a circumferential portion of the opening and is fixedly connected to the insulating base body. A through hole in communication with the opening is defined by the metal frame. The metal frame is used for connecting a metal cover plate. The metal cover plate plugs the through hole, so that the structural strength of the housing may meet the use requirements.

Abstract: The disclosure provides a pole post, a top cap assembly, and a cell. The pole post includes a metal base and a metal post; the metal post is disposed on a top of the metal base; a material of the metal post is different from a material of the metal base; a bottom of the metal post is connected to a top of the metal base, and a surface of the metal post away from the metal base is provided with a first groove.

Abstract: A cell includes an internal fixed structure of the cell, a pole core, a housing, and a top cover. The internal fixed structure of the cell includes a lower insulating plastic and a holder mounted on the lower insulating plastic. The lower insulating plastic is provided with an abutting surface. The abutting surface abuts against the pole core. The pole core is disposed in the housing and connected to a tab. The top cover is provided with a terminal. The top cover is connected to an end of the housing. The top cover is connected to the lower insulating plastic of the internal fixed structure of the cell. The abutting surface of the lower insulating plastic and the housing each abut against an outer wall of the pole core.

Abstract: A battery case and a battery are provided. The battery case includes a case body. The case body is formed by a sheet-shaped plate being bent and welded. The plate has a first end and a second end. After the case body is bent, the first end is welded to the second end, a welding position at which the first end is welded to the second end is compressed to form an explosion-proof recess.