US 12,148,949 B2
Battery, battery module, battery pack and electric device
Yuping Huang, Ningde (CN); Mingfeng Lin, Ningde (CN); Yunjian Ma, Ningde (CN); Honggang Yu, Ningde (CN); Yanhui Li, Ningde (CN); Jianping Zhang, ningde (CN); Yu Dai, Ningde (CN); and Yidong Shen, 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. 3, 2022, as Appl. No. 17/937,768.
Application 17/937,768 is a continuation of application No. PCT/CN2021/108971, filed on Jul. 28, 2021.
Prior Publication US 2023/0117614 A1, Apr. 20, 2023
Int. Cl. H01M 50/414 (2021.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/583 (2010.01); H01M 50/457 (2021.01)
CPC H01M 50/414 (2021.01) [H01M 4/364 (2013.01); H01M 4/386 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/583 (2013.01); H01M 50/457 (2021.01)] 16 Claims
OG exemplary drawing
 
1. A battery, comprising:
a positive electrode, a separator and a negative electrode, wherein the separator comprises a base film, a first coating provided on a first surface of the base film, and a second coating provided on a second surface of the base film, the positive electrode comprises a positive film layer, the negative electrode comprises a negative film layer, wherein
the first coating comprises a first polar substance, the first polar substance comprises polyethylene oxide and polyacrylamide, and hydrogen bonds are formed between the first polar substance and a positive binder of the positive film layer; and
the second coating comprises a second polar substance, the second polar substance comprises polyethylene imine and polyethylene oxide, and hydrogen bonds are formed between the second polar substance and a negative binder and/or a negative active component of the negative film layer,
wherein a peeling force between the first coating and the positive electrode is not lower than 0.075N; a peeling force between the second coating and the negative electrode is not lower than 0.075N;
the first polar substance has a mass content w1 of 80%-90% in the first coating, and the positive binder has a mass content m1 of 0.9%-1.2% in the positive film layer; and
the second polar substance has a mass content w2 of 80%-90% in the second coating, and the negative binder has a mass content m2 of 2%-3% in the negative film layer.