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:
Nov. 15, 2022
Filed:
Sep. 25, 2018
Applicant:
Sanyo Electric Co., Ltd., Daito, JP;
Inventor:
Hidekazu Tamai, Kyoto, JP;
Assignee:
SANYO Electric Co., Ltd., Daito, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 50/449 (2021.01); H01M 10/058 (2010.01); H01M 10/42 (2006.01); H01M 50/411 (2021.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 50/449 (2021.01); H01M 10/058 (2013.01); H01M 10/4235 (2013.01); H01M 50/411 (2021.01); H01M 10/0525 (2013.01);
Abstract
A nonaqueous electrolyte secondary battery includes an electrode assembly including a positive electrode, a negative electrode, and a separator and a nonaqueous electrolyte. The separator includes a porous resin sheet having at least a three-layer structure consisting of an A-layer, a B-layer, and a C-layer stacked in that order. The average thermal expansion coefficient of each of the A-layer and the C-layer at a temperature of 0° C. to 50° C. is 100 ppm/K or more less than the average thermal expansion coefficient of the B-layer at a temperature of 0° C. to 50° C.