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:
Sep. 17, 2024
Filed:
Jun. 18, 2019
Sanyo Electric Co., Ltd., Daito, JP;
Akira Takano, Osaka, JP;
Oose Okutani, Hyogo, JP;
PANASONIC ENERGY CO., LTD., Osaka, JP;
Abstract
A nonaqueous electrolyte secondary battery which includes a metal foil collector of one of a positive electrode plate and a negative electrode plate which is exposed at at least part of the outermost circumferential surface of the electrode group in a rolling direction, and the collector is in contact with the inner surface of a case main body. When a region of the inner surface of the case main body from the opening-portion-side edge to the position in contact with the bottom-portion-side edge of the gasket is denoted as a first region Sand a region of the inner surface of the case main body opposing the outermost circumferential surface of the electrode group is denoted as a second region S, the arithmetic mean roughness Raof the first region Sand the arithmetic mean roughness Raof the second region Ssatisfy Ra<Ra