US 12,095,111 B2
Battery cell, battery, electrical device, manufacturing method, and manufacturing device
Jianxiong Yang, Jiangsu (CN); Siying Huang, Jiangsu (CN); and Zhijun Guo, Jiangsu (CN)
Assigned to JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED, Changzhou (CN)
Filed by JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED, Jiangsu (CN)
Filed on Oct. 14, 2022, as Appl. No. 18/046,509.
Application 18/046,509 is a continuation of application No. PCT/CN2021/083193, filed on Mar. 26, 2021.
Prior Publication US 2023/0114279 A1, Apr. 13, 2023
Int. Cl. H01M 50/342 (2021.01); H01M 50/147 (2021.01); H01M 50/204 (2021.01); H01M 50/233 (2021.01)
CPC H01M 50/342 (2021.01) [H01M 50/147 (2021.01); H01M 50/233 (2021.01); H01M 50/3425 (2021.01); H01M 50/204 (2021.01); H01M 2220/20 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A battery cell, comprising:
a shell, wherein the shell comprises a wall; and
a pressure relief mechanism disposed on the wall, wherein the pressure relief mechanism comprises
a body portion and a fragile portion connected to the body portion, wherein the body portion is configured to connect to the wall, and the pressure relief mechanism is configured to break the fragile portion when an internal pressure or temperature of the battery cell reaches a threshold, so as to release the pressure; and
a reinforcement portion disposed in the body portion in a thickness direction of the body portion, wherein the reinforcement portion is configured to reduce deformation of the body portion;
the fragile portion is formed by making a groove on the pressure relief mechanism, and a thickness of the fragile portion is less than a thickness of the body portion;
the region enclosed by the groove possesses an axis, the reinforcement portion comprises two end regions, and a thickness of the end regions gradually decreases in a direction from the end regions to the axis.