US 12,249,724 B2
Battery cell, battery, method and device for preparing a battery cell
Ningsheng Wu, Ningde (CN); Chengyou Xing, Ningde (CN); Peng Wang, Ningde (CN); Chengdu Liang, Ningde (CN); Quankun Li, Ningde (CN); Wenlong Kang, Ningde (CN); Lingyan Jiang, Ningde (CN); and Weigan Xie, 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. 29, 2020, as Appl. No. 17/137,312.
Application 17/137,312 is a continuation of application No. PCT/CN2020/109654, filed on Aug. 17, 2020.
Prior Publication US 2022/0052404 A1, Feb. 17, 2022
Int. Cl. H01M 50/166 (2021.01); H01M 50/148 (2021.01); H01M 50/204 (2021.01); H01M 50/271 (2021.01)
CPC H01M 50/148 (2021.01) [H01M 50/166 (2021.01); H01M 50/204 (2021.01); H01M 50/271 (2021.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A battery cell characterized by comprising:
a housing being hollow and comprising an opening,
an end cover assembly comprising an end cover and an insulator, a periphery of the end cover being directly combined with a frame at the opening of the housing so that the end cover covers the housing and is connected to the opening of the housing and at least a part of the end cover being inserted into the housing, the housing and the end cover being both metallic, the end cover being welded to the opening of the housing, the part of the end cover inserted into the housing comprising an end surface and a first side surface, wherein the end surface is substantially perpendicular to an insertion direction of the end cover, the first side surface is distributed along a periphery of the end surface and faces an inner wall surface of the housing, and wherein the inner wall surface is substantially parallel to the insertion direction of the end cover, and the end surface and the first side surface intersect to form a first edge, and
an electrode assembly contained in the housing, the end surface of the end cover facing the electrode assembly,
wherein the insulator is connected to the end surface and is located, in its entirety, at a side of the end cover where the end surface is located, the insulator extends beyond the first edge toward the inner wall surface in a first direction, an clearance exists between the insulator and the inner wall surface in the first direction, and the first direction is a direction perpendicular to the insertion direction of the end cover and towards the inner wall surface.