US 12,476,321 B2
Battery cell, battery, and electrical device
Kai Wu, Ningde (CN); Xiaobo Chen, Ningde (CN); Sike Liu, Ningde (CN); Mingguang Gu, Ningde (CN); and Jingfeng Bai, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on May 22, 2025, as Appl. No. 19/216,009.
Application 19/216,009 is a continuation of application No. PCT/CN2023/111081, filed on Aug. 3, 2023.
Claims priority of application No. 202310636914.6 (CN), filed on May 31, 2023.
Prior Publication US 2025/0286206 A1, Sep. 11, 2025
Int. Cl. H01M 50/107 (2021.01); H01M 50/103 (2021.01); H01M 50/342 (2021.01); B60L 50/64 (2019.01)
CPC H01M 50/3425 (2021.01) [H01M 50/103 (2021.01); H01M 50/107 (2021.01); B60L 50/64 (2019.02); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A battery cell, comprising:
a shell having a wall portion, wherein the wall portion comprises a weak portion, the weak portion is configured to be destroyed when the battery cell releases internal pressure, and an outer surface of the wall portion has a center point; and
a maximum distance between a projection of the weak portion on the outer surface of the wall portion and the center point is a, the minimum radial dimension of the outer surface of the wall portion is A, a and A satisfy: a≤0.4A, and the radial direction refers to a direction passing through the center point.