US 12,080,908 B2
Top cover assembly, secondary battery and apparatus using battery
Siying Huang, Fujian (CN); Quankun Li, Fujian (CN); Shiyao Zhang, Fujian (CN); Jinmei Xu, Fujian (CN); Fenggang Zhao, Fujian (CN); and Peng Wang, Fujian (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Fujian (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Fujian (CN)
Filed on Dec. 28, 2021, as Appl. No. 17/564,108.
Application 17/564,108 is a continuation of application No. PCT/CN2020/099503, filed on Jun. 30, 2020.
Claims priority of application No. 201921183823.7 (CN), filed on Jul. 25, 2019.
Prior Publication US 2022/0123417 A1, Apr. 21, 2022
Int. Cl. H01M 50/271 (2021.01); H01M 50/143 (2021.01)
CPC H01M 50/271 (2021.01) [H01M 50/143 (2021.01)] 12 Claims
OG exemplary drawing
 
1. A top cover assembly of a secondary battery, the top cover assembly comprising:
a top cover sheet provided with an explosion-proof hole;
an explosion-proof sheet, a position of the explosion-proof sheet corresponding to the explosion-proof hole; and
a fixing member, at least part of the fixing member being located between the top cover sheet and the explosion-proof sheet and connecting the top cover sheet and the explosion-proof sheet,
wherein one of the explosion-proof hole and the fixing member is provided with a protrusion and the other is provided with a first groove,
the protrusion and the first groove are fixed,
the protrusion is arranged on one side of an inner wall of the explosion-proof hole facing towards a central axis of the explosion-proof hole, the first groove is arranged on one side of the fixing member facing towards the top cover sheet, a second groove is arranged on one side of the fixing member facing towards the explosion-proof sheet, the explosion-proof sheet comprises a main body and a stretching-into portion located on an end part of the main body, and the stretching-into portion stretches into the second groove to be fixed;
the protrusion is located at a center of the inner wall of the explosion-proof hole along a height direction of the top cover assembly; and
a center line of the protrusion coincides with a center line of the stretching-into portion along a length direction of the top cover assembly.