US 12,142,795 B2
Top pressing plate, secondary battery and method for manufacturing secondary battery
Baojian Zhu, Ningde (CN); Lei Chen, Ningde (CN); Shoujiang Xu, Ningde (CN); and Chunyan Feng, Ningde (CN)
Assigned to Contemporary Amperex Technology (HONG KONG) Limited, Hong Kong (CN)
Appl. No. 16/964,318
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
PCT Filed Oct. 15, 2019, PCT No. PCT/CN2019/111200
§ 371(c)(1), (2) Date Jul. 23, 2020,
PCT Pub. No. WO2020/088239, PCT Pub. Date May 7, 2020.
Claims priority of application No. 201811278761.8 (CN), filed on Oct. 30, 2018.
Prior Publication US 2021/0043912 A1, Feb. 11, 2021
Int. Cl. H01M 50/54 (2021.01); H01M 10/0585 (2010.01); H01M 50/176 (2021.01); H01M 50/383 (2021.01); H01M 50/579 (2021.01); H01M 50/147 (2021.01)
CPC H01M 50/54 (2021.01) [H01M 10/0585 (2013.01); H01M 50/176 (2021.01); H01M 50/383 (2021.01); H01M 50/579 (2021.01); H01M 50/147 (2021.01)] 16 Claims
OG exemplary drawing
 
1. A top pressing plate, which is used for a secondary battery, the secondary battery comprising a top cover sheet, an insulating separator connected to the top cover sheet, and an electrode assembly, the electrode assembly comprising a main body portion and electrode tabs connected to the main body portion, the electrode tabs each comprising a welding end portion, wherein the top pressing plate comprises:
a first surface and a second surface provided oppositely in a thickness direction of the top pressing plate and an accommodating groove recessed from the second surface toward the first surface,
the top pressing plate can be provided between the insulating separator and the main body portion, the first surface faces the main body portion, the second surface faces the insulating separator, and the accommodating groove is disposed to accommodate the welding end portion,
the top pressing plate comprises a first boss, the insulating separator comprises a first insulator and a second insulator, the first insulator and the second insulator are spaced apart in a length direction of the top pressing plate so as to form an avoiding gap, the first boss is arranged corresponding to the avoiding gap,
each of the first insulator and the second insulator has an accommodating recess recessed away from the main body portion and a second boss protruding toward the main body portion, the accommodating recess comprises a bottom away from the main body portion, the top pressing plate and the welded end portion are both accommodated in the accommodating recess, and the second surface of the top pressing plate abuts the bottom of the accommodating recess away from the main body portion and the second boss of each of the first insulator and the second insulator abuts against the bottom of the accommodating groove at the middle position of the top pressing plate so that there is no gap for moving between the top pressing plate and the insulating separator.