US 12,469,926 B2
Battery cell, cover assembly, battery, electric apparatus, method, and device
Wanqiu Meng, Ningde (CN); Qian Liu, Ningde (CN); Yonghuang Ye, Ningde (CN); Yulian Zheng, Ningde (CN); Longfei Xue, Ningde (CN); Xiaoxi Zhang, Ningde (CN); and Peng Wang, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Dec. 13, 2022, as Appl. No. 18/064,933.
Application 18/064,933 is a continuation of application No. PCT/CN2021/121387, filed on Sep. 28, 2021.
Prior Publication US 2023/0114679 A1, Apr. 13, 2023
Int. Cl. H01M 50/147 (2021.01); H01M 50/30 (2021.01)
CPC H01M 50/394 (2021.01) [H01M 50/147 (2021.01)] 19 Claims
OG exemplary drawing
 
1. A battery cell, comprising:
an electrode assembly;
a housing, configured to accommodate the electrode assembly, wherein a wall portion of the housing comprises a body portion and a fastener, the fastener is provided with a recess communicating with an outside, and the recess is arranged on an inner surface of the fastener facing the electrode assembly and recessed in a direction leaving the electrode assembly; and
an air-permeable member covering the recess, wherein the air-permeable member is configured to allow gas to be discharged to the outside of the housing through the recess when a gas pressure inside the housing reaches a threshold;
wherein a bottom wall of the recess is provided with a protruding portion extending toward the electrode assembly, and the protruding portion is configured to be attached to the air-permeable member, so as to limit deformation of the air-permeable member in a thickness direction of the wall portion,
an accommodating cavity communicating with the outside is formed between an outer peripheral wall of the protruding portion and an inner peripheral wall of the recess, the bottom wall of the recess is provided with a first through hole, and the first through hole is configured to allow gas circulation with an inner space of the battery cell through the accommodating cavity.