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. 29, 2025
Filed:
Feb. 13, 2020
Applicant:
Teijin Limited, Osaka, JP;
Inventor:
Megumi Sato, Osaka, JP;
Assignee:
TEIJIN LIMITED, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 50/446 (2020.12); H01M 4/62 (2005.12); H01M 50/409 (2020.12); H01M 50/426 (2020.12); H01M 50/489 (2020.12); H01M 50/491 (2020.12);
U.S. Cl.
CPC ...
H01M 50/446 (2020.12); H01M 4/623 (2012.12); H01M 4/626 (2012.12); H01M 50/409 (2020.12); H01M 50/426 (2020.12); H01M 50/491 (2020.12); H01M 50/489 (2020.12);
Abstract
Provided is a separator for a non-aqueous secondary battery containing a porous substrate; and a heat-resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin A that is a polyvinylidene fluoride type resin containing a tetrafluoroethylene unit; a polyvinylidene fluoride type resin B that is a polyvinylidene fluoride type resin other than the polyvinylidene fluoride type resin A; and a filler, in which an average primary particle diameter of the filler contained in the heat-resistant porous layer is from 0.01 μm to 1.0 μm.