Title:
HIGH-PRESSURE-RESISTANCE SEPARATOR FOR LITHIUM ION BATTERY AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/024588
Kind Code:
A1
Abstract:
The present application relates to the field of lithium battery separator manufacturing, and in particular to a high-pressure-resistance separator for a lithium ion battery and a preparation method therefor. In the present application, in a preparation process of a separator, stretching processes in a length direction and a width direction of the separator are set, and a stretching process perpendicular to a separator surface direction, i.e., a thickness direction, is also added, such that the separator is stretched in the length direction, the width direction, and the thickness direction, crystal chain growth in the thickness direction is increased, and the separator having excellent compression resistance is finally obtained and can adapt to a cold pressing or hot pressing process in a production process, thereby reducing the deformation of the separator, and delaying an aging process of the separator in use.
Inventors:
ZHUANG ZHI (CN)
PENG KUN (CN)
YANG HONGBIAO (CN)
CAI YUHONG (CN)
YE CHENGLIANG (CN)
CHENG YUE (CN)
PENG KUN (CN)
YANG HONGBIAO (CN)
CAI YUHONG (CN)
YE CHENGLIANG (CN)
CHENG YUE (CN)
Application Number:
PCT/CN2022/092789
Publication Date:
March 02, 2023
Filing Date:
May 13, 2022
Export Citation:
Assignee:
JIANGXI TONRY NEW ENERGY TECH DEVELOPMENT CO LTD (CN)
International Classes:
H01M50/403; B29D7/01; C08J5/18
Foreign References:
| CN113871791A | 2021-12-31 | |||
| CN113601879A | 2021-11-05 | |||
| JP2007119713A | 2007-05-17 | |||
| CN211404607U | 2020-09-01 | |||
| CN1926180A | 2007-03-07 | |||
| CN110239172A | 2019-09-17 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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