# US 12,009,547 B2 · Battery cell, battery, electrical device, and battery cell manufacturing method and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,547 B2 - Document ID: US12009547B2 - Status: Granted - Kind: B2 - Application number: 17/564,598 - Filed: 2021-12-29 - Published: 2022-12-01 - Granted: 2024-06-11 - Earliest claimed: 2021-05-28 - Assignees: Contemporary Amperex Technology Co., Limited - Applicants: Contemporary Amperex Technology Co., Limited - Inventors: Wenlin Zhou; Yulian Zheng; Xinxiang Chen; Liangfan Xu; Peng Wang; Haizu Jin - Web page: https://patentgrep.com/patent/US12009547B2 ## CPC - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding - H01M 10/04: Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 50/147: Lids or covers - H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence) - H01M 50/176: for prismatic or rectangular cells (H01M50/181 takes precedence) - H01M 50/528: Fixed electrical connections, i.e. not intended for disconnection - H01M 50/531: Electrode connections inside a battery casing - H01M 50/533: characterised by the shape of the leads or tabs - H01M 50/538: Connection of several leads or tabs of wound or folded electrode stacks - H01M 50/54: Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges - H01M 50/55: on the same side of the cell - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - H01M 50/593: Spacers; Insulating plates - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The embodiments of this application provide a battery cell, a battery, an electrical device, and a battery cell manufacturing method and device, which pertains to the technical field of batteries. The battery cell includes an electrode assembly, a housing, an end cover assembly, and a support piece. The electrode assembly includes a main body and tabs. The housing has an opening and is used to accommodate the electrode assembly. The end cover assembly is used to cover the opening. The support piece is located between the main body and the end cover assembly, the tabs are bent around the support piece, and the support piece is configured to prevent the main body from moving along a direction facing the end cover assembly. ## Claims ### Claim 1 A battery cell, comprising: an electrode assembly, comprising a main body and tabs; a housing with an opening, wherein the housing is used to accommodate the electrode assembly; an end cover assembly used to cover the opening; and a support piece located between the main body and the end cover assembly, wherein the tabs are bent around the support piece, and the support piece is configured to prevent the main body from moving along a direction facing the end cover assembly; wherein the end cover assembly is provided with a first recessed portion facing the main body, and the first recessed portion is configured to accommodate at least a part of the support piece; wherein the first recessed portion is configured to accommodate at least a part of the tab. ### Claim 2 (depends on 1) The battery cell according to claim 1, wherein the support piece comprises: a support portion for abutting against the main body along a thickness direction of the end cover assembly; and a partition portion, wherein the tabs are bent around the partition portion, and in a width direction of the end cover assembly, the partition portion is connected to one end of the support portion. ### Claim 3 (depends on 2) The battery cell according to claim 2, wherein a projected area of the support portion is larger than a projected area of the partition portion in the thickness direction of the end cover assembly. ### Claim 4 (depends on 2) The battery cell according to claim 2, wherein a size of the support portion is larger than a size of the partition portion in the thickness direction of the end cover assembly. ### Claim 5 (depends on 2) The battery cell according to claim 2, wherein one side of the support piece facing the end cover assembly has a reinforcement portion, and the reinforcement portion is used to enhance strength of the support piece; wherein the side of the support piece facing the end cover assembly is provided with a groove, the groove is recessed into the support portion, and the reinforcement portion is located in the groove. ### Claim 6 (depends on 2) The battery cell according to claim 2, wherein the tabs comprise: a first bending portion, wherein the first bending portion is located on a side of the partition portion facing the main body; and a second bending portion connected to the first bending portion and bent relative to the first bending portion, wherein the second bending portion is located on a side of the partition portion departing from the main body. ### Claim 7 (depends on 1) The battery cell according to claim 1, wherein the end cover assembly comprises: an end cover used to cover the opening; and an insulating piece disposed on a side of the end cover facing the main body, wherein the insulating piece is configured to isolate the end cover from the electrode assembly, the first recessed portion is disposed on the insulating piece, the support piece is located between the insulating piece and the main body, and the support piece abuts against the insulating piece and the main body. ### Claim 8 (depends on 7) The battery cell according to claim 7, wherein the insulating piece comprises: a first body portion, wherein the first body portion has a first inner surface and a first outer surface that are arranged opposite to each other in the thickness direction of the end cover assembly; and a first protruding portion, wherein the first protruding portion protrudes from the first outer surface along a direction departing from the main body, and the first recessed portion recessed from the first inner surface in the direction departing from the main body is formed at a position corresponding to the first protruding portion on the first body portion; and the end cover is provided with a second recessed portion facing the main body, and the second recessed portion is used to accommodate at least a part of the first protruding portion. ### Claim 9 (depends on 8) The battery cell according to claim 8, wherein in the thickness direction of the end cover assembly, a bottom surface of the first recessed portion is farther from the main body than the first outer surface. ### Claim 10 (depends on 8) The battery cell according to claim 8, wherein the end cover comprises: a second body portion, wherein the second body portion has a second inner surface and a second outer surface that are arranged opposite to each other in the thickness direction of the end cover assembly, and the second inner surface faces the first outer surface; and a second protruding portion, wherein the second protruding portion protrudes from the second outer surface along the direction departing from the main body, and the second recessed portion recessed from the second inner surface in the direction departing from the main body is formed at a position corresponding to the second protruding portion on the second body portion. ### Claim 11 (depends on 10) The battery cell according to claim 10, wherein in the thickness direction of the end cover assembly, a bottom surface of the second recessed portion is farther from the main body than the second outer surface. ### Claim 12 (depends on 1) A battery, comprising: the battery cell according to claim 1; and a box body used to accommodate the battery cell. ### Claim 13 (depends on 12) An electrical device, comprising the battery according to claim 12.