BATTERY SEPARATOR AND COATING PROCESS AND COATING SYSTEM THEREFOR, AND BATTERY

WIPO Patent Application WO/2022/089065

A1

The present invention relates to the field of lithium battery separators, and the purpose of the present invention is to provide a battery separator and a coating process and coating system therefor, and a battery. The coating process comprises: carrying out preliminary heat setting of a polyolefin film, on-line coating of the polyolefin film and heat setting of a coated film. The coating system comprises a plurality of ovens arranged in a travel path of the heat setting of a polyolefin film, and a coating device for coating the polyolefin film with a coating slurry arranged in spacing between adjacent ovens. The on-line coating process is arranged at the stage before the end of the heat setting of the polyolefin film, the polyolefin-based film and the coating slurry are dried by fully utilizing a polyolefin film heat setting oven temperature, and the coating is in close contact with the polyolefin-based film, such that the heat resistance of the coated film is effectively improved, and the water content of the coated film is reduced. Compared with an existing process flow, the process is simplified, and the slitting pass rate is also significantly improved.

CHENG YUE (CN)
LIAO CHENBO (CN)
CHEN YONGLE (CN)
ZHUANG ZHI (CN)
SHAN HUAJING (CN)
LIU QIANQIAN (CN)

PCT/CN2021/118234

May 05, 2022

September 14, 2021

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SHANGHAI ENERGY NEW MAT TECH CO LTD (CN)

H01M8/0271

CN105702899A	2016-06-22
CN113054319A	2021-06-29
CN109285981A	2019-01-29
TW201819198A	2018-06-01

SHANGHAI YUANTONG LAW FIRM (CN)

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