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:
Feb. 04, 2020
Filed:
May. 12, 2017
Sumitomo Chemical Company, Limited, Tokyo, JP;
Kosuke Kurakane, Osaka, JP;
Chikara Murakami, Osaka, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
A nonaqueous electrolyte secondary battery insulating porous layer usable as a member of a nonaqueous electrolyte secondary battery having an excellent cycle characteristic is provided. A nonaqueous electrolyte secondary battery insulating porous layer includes a thermoplastic resin, porosity of the nonaqueous electrolyte secondary battery insulating porous layer being not less than 25% and not more than 80%, and a ratio of a displacement amount of the nonaqueous electrolyte secondary battery insulating porous layer at tenth loading-unloading cycle to a displacement amount of the nonaqueous electrolyte secondary battery insulating porous layer at fiftieth loading-unloading cycle being not less than 100% and less than 115%.