The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2021
Filed:
Feb. 08, 2017
Applicant:
Shanghai Energy New Materials Technology Co., Ltd., Shanghai, CN;
Inventors:
Alex Cheng, Shanghai, CN;
Xiaoming Su, Shanghai, CN;
Weiqiang Wang, Shanghai, CN;
Fangbo He, Shanghai, CN;
Yongle Chen, Shanghai, CN;
Assignee:
SHANGHAI ENERGY NEW MATERIALS TECHNOLOGY CO., LTD., Shanghai, CN;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 55/16 (2006.01); H01M 50/403 (2021.01); B29C 41/00 (2006.01); B29C 55/00 (2006.01); B29C 67/20 (2006.01); B29C 71/02 (2006.01); H01M 10/0525 (2010.01); H01M 50/411 (2021.01); B29L 31/34 (2006.01);
U.S. Cl.
CPC ...
H01M 50/403 (2021.01); B29C 41/003 (2013.01); B29C 55/005 (2013.01); B29C 55/16 (2013.01); B29C 67/202 (2013.01); B29C 71/02 (2013.01); H01M 10/0525 (2013.01); H01M 50/411 (2021.01); B29K 2023/06 (2013.01); B29L 2031/3468 (2013.01);
Abstract
A method for preparing a lithium-ion battery separator is disclosed. The method comprises: cooling and shaping a liquid-phase stabilization system containing polyethylene, stretching to enlarge pores, extracting with a solvent, and heat-setting to obtain a lithium-ion battery separator, wherein the stretching includes pre-stretching and synchronous bidirectional stretching, and the pre-stretching is completed before the synchronous bidirectional stretching.