US 12,266,806 B2
Battery cell, battery, electrical device, and manufacturing method and device for battery cell
Huasheng Su, Ningde (CN); Chengyou Xing, Ningde (CN); Quankun Li, Ningde (CN); Jing Zhang, Ningde (CN); and Haizu Jin, 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 Oct. 31, 2022, as Appl. No. 17/976,882.
Application 17/976,882 is a continuation of application No. PCT/CN2021/109912, filed on Jul. 30, 2021.
Prior Publication US 2023/0048125 A1, Feb. 16, 2023
Int. Cl. H01M 50/152 (2021.01); H01M 50/536 (2021.01); H01M 50/636 (2021.01)
CPC H01M 50/152 (2021.01) [H01M 50/536 (2021.01); H01M 50/636 (2021.01); H01M 2220/20 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A battery cell, comprising:
an electrode assembly, having a first tab;
a housing, having an opening, with the housing configured to receive the electrode assembly; and
an end cap, configured to connect with the housing and covering the opening, wherein the end cap has an abutting surface and a welding groove, the abutting surface is configured to abut against the first tab, the welding groove is recessed from one side of the end cap away from the electrode assembly towards the abutting surface, the end cap forms a connector between the abutting surface and a bottom surface of the welding groove, and the connector is welded with the first tab,
wherein the end cap is provided with a reinforcing structure, the reinforcing structure is protruded from the bottom surface of the welding groove, and the reinforcing structure enhances strength of the connector; and
the connector is welded with the first tab to form a weld mark, the weld mark comprises a first part and a second part that are continuously arranged, and the first part is formed at the reinforcing structure, and the second part is formed on the connector.