US 12,482,898 B2
Separator having coating containing ethylene carbonate, secondary battery, battery module, battery pack, and power consumption apparatus
Yuqun Zeng, Fujian (CN); Chuying Ouyang, Fujian (CN); Chengdong Sun, Fujian (CN); Yi Zheng, Fujian (CN); and Haiyang Kang, Fujian (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 May 26, 2023, as Appl. No. 18/202,361.
Application 18/202,361 is a continuation of application No. PCT/CN2021/123237, filed on Oct. 12, 2021.
Prior Publication US 2023/0299419 A1, Sep. 21, 2023
Int. Cl. H01M 50/449 (2021.01); H01M 10/0525 (2010.01); H01M 50/403 (2021.01); H01M 50/446 (2021.01)
CPC H01M 50/449 (2021.01) [H01M 10/0525 (2013.01); H01M 50/403 (2021.01); H01M 50/446 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A separator, comprising a porous base film and a bonding layer coated on one or both faces of the porous base film, the bonding layer consists essentially of ethylene carbonate and a nucleating agent,
wherein the nucleating agent is an inorganic nucleating agent,
the inorganic nucleating agent is one or more of a metal or non-metal oxide, a hydroxide, a fluoride, a sulfate, a silica, a phosphate, a carbonate, or carbon black, and
an amount of the nucleating agent added is greater than or equal to 0.5° and less than or equal to 10% and a mass percentage of the ethylene carbonate is equal to or greater than 90% and less than 100% with respect to a total weight of the bonding layer.