US 11,757,157 B2
Cap assembly and secondary battery
Huasheng Su, Ningde (CN); Shoujun Huang, Ningde (CN); Xinxiang Chen, Ningde (CN); Yulian Zheng, Ningde (CN); and Peng Wang, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed by Contemporary Amperex Technology Co., Limited, Fujian (CN)
Filed on Sep. 18, 2021, as Appl. No. 17/478,888.
Application 17/478,888 is a continuation of application No. PCT/CN2020/080428, filed on Mar. 20, 2020.
Claims priority of application No. 201920426787.6 (CN), filed on Apr. 1, 2019.
Prior Publication US 2022/0006145 A1, Jan. 6, 2022
Int. Cl. H01M 50/528 (2021.01); H01M 50/591 (2021.01); H01M 50/147 (2021.01); H01M 50/562 (2021.01); H01M 50/176 (2021.01); H01M 50/553 (2021.01); H01M 50/55 (2021.01)
CPC H01M 50/528 (2021.01) [H01M 50/147 (2021.01); H01M 50/562 (2021.01); H01M 50/591 (2021.01); H01M 50/176 (2021.01); H01M 50/55 (2021.01); H01M 50/553 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A cap assembly for a secondary battery, comprising:
a cap plate, wherein the cap plate comprises an electrode lead-out hole;
an electrode terminal, wherein the electrode terminal comprises a terminal board, the terminal board is located at a side of the cap plate and covers the electrode lead-out hole;
a fixing member, wherein the fixing member at least partially surrounds the terminal board to fix the terminal board to the fixing member;
a connection member, wherein the connection member is separated from the electrode terminal by the fixing member, and the connection member is connected with the cap plate; the connection member comprises a main body, the main body is provided with a first groove formed downwardly along a top of the main body;
wherein a part of the fixing member is located in the first groove;
wherein the main body comprises a cylinder-like base portion and a ring-like first flange;
the first flange extends from the base portion in a direction toward the terminal board;
the first groove penetrates the first flange.