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:
Jul. 03, 2018
Filed:
Nov. 28, 2016
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventors:
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 2/18 (2006.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
H01M 2/1653 (2013.01); H01M 2/1686 (2013.01); H01M 2/18 (2013.01); H01M 10/052 (2013.01);
Abstract
Provided is a nonaqueous electrolyte secondary battery separator including a porous film containing, as a main component, polyolefin having a weight average molecular weight of not less than 500,000, the nonaqueous electrolyte secondary battery separator having an MD orientation ratio of 58% to 80%, a degree of MD orientation of 70% to 80%, and a degree of TD orientation of 65% to 85%, the nonaqueous electrolyte secondary battery separator having a film thickness of not more than 14 μm, and the nonaqueous electrolyte secondary battery separator being excellent in shutdown temperature and puncture strength.