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:
Jul. 07, 2026
Filed:
Nov. 17, 2020
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Masao Ootsuka, Osaka, JP;
Tadayoshi Takahashi, Osaka, JP;
Abstract
A sealed battery includes a battery can with a bottomed cylindrical shape having an opening, an electrode body accommodated in the battery can, and a sealing plate closing the opening of the battery can. The sealing plate has a first main surface facing an outside of the battery can and a second main surface opposite to the first main surface. The first main surface has a first groove therein with an arc shape. The second main surface has a second groove therein with an arc shape disposed to correspond to the first groove. The first groove has a central angle A1 smaller than a central angle A2 of the second groove. The first groove intersects a symmetry axis of the second groove on the second groove when viewed in a normal direction of the first main surface.