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. 23, 2025
Filed:
Dec. 19, 2019
Sanyo Electric Co., Ltd., Daito, JP;
Panasonic Corporation, Kadoma, JP;
PANASONIC ENERGY CO., LTD., Osaka, JP;
PANASONIC HOLDINGS CORPORATION, Osaka, JP;
Abstract
A cylindrical battery wherein a central part of a sealing plate, fixed by swaging to an opening of an external packaging can, is configured to be warped toward the inner part of the battery. One embodiment is provided with: an electrode body in which a positive electrode plate and a negative electrode plate are rolled with a separator being disposed therebetween; an electrolytic solution; an external packaging can which has a bottomed cylindrical shape and which houses the electrode body and the electrolytic solution; and a sealing plate which is fixed by swaging to an opening of the external packaging can with a gasket therebetween. In the sealing plate, prior to the swage fixing, an outer peripheral edge to be fixed by swaging to the external packaging can is formed inclined so as to be directed to the inner part of the battery, toward radially outward.