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:
Mar. 01, 2022
Filed:
Dec. 11, 2017
Sanyo Electric Co., Ltd., Daito, JP;
Junichi Sugaya, Osaka, JP;
Atsushi Mizawa, Osaka, JP;
Yuji Yamagami, Osaka, JP;
Tomomichi Ueda, Osaka, JP;
Masahiro Nakamura, Osaka, JP;
SANYO Electric Co., Ltd., Daito, JP;
Abstract
A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes: a wound electrode assembly () formed by spirally winding, via a separator (), a positive electrode () and a negative electrode () in which a negative electrode mixture layer is formed on a negative electrode core, where: the negative electrode () includes a non-opposing portion () that is wound 1.25 turns or more from an inner edge in a winding direction of the wound electrode assembly () without facing the positive electrode via the separator (); the non-opposing portion () includes a negative electrode mixture layer-formed portion () in which the negative electrode mixture layer is formed on at least either side continuously in an inward winding direction from an outer edge in the winding direction; and the negative electrode mixture layer-formed portion () is wound 0.75 turns or more.