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:
Apr. 13, 2021
Filed:
Oct. 10, 2019
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventor:
Kosuke Kurakane, Osaka, JP;
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 4/13 (2010.01); H01M 10/0525 (2010.01); H01M 50/44 (2021.01); H01M 50/411 (2021.01); H01M 50/449 (2021.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 50/44 (2021.01); H01M 4/13 (2013.01); H01M 10/0525 (2013.01); H01M 50/411 (2021.01); H01M 50/449 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01);
Abstract
An embodiment of the present invention provides, as a nonaqueous electrolyte secondary battery separator excellent in cycle characteristic, a nonaqueous electrolyte secondary battery separator including a polyolefin porous film, wherein a ratio of a displacement amount of the nonaqueous electrolyte secondary battery separator at a 10th loading-unloading cycle to a displacement amount of the nonaqueous electrolyte secondary battery separator at a 50th loading-unloading cycle is in a range of 100% to 130%.