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:
Dec. 09, 2025
Filed:
Jun. 10, 2020
Nippon Steel Corporation, Tokyo, JP;
Akinobu Kobayashi, Tokyo, JP;
Koichi Nose, Tokyo, JP;
Yasuto Goto, Tokyo, JP;
Takehiro Takahashi, Tokyo, JP;
Tatsuo Nagata, Tokyo, JP;
Masaharu Ibaragi, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A battery case and method of production of the same realizing smaller size, higher mountability, longer service life, and lower cost than in the past, that is, a battery case comprising a container body and a container cover, in which battery case, one or both of the container body and the container cover are made from a laminated steel sheet comprised of a plated steel sheet on which a film having a polyolefin-based resin as a main constituent is laminated, a joined part of the container body and the container cover has a welded part of the plated steel sheet, a melt bonded part of the film, and a gap part between the welded part and the melt bonded part, where a length of gap part/thickness of plated steel sheet ≤10.0 and a length of gap part/length of joined part <0.50, and at least part of the inside surface of the battery case is covered by the film, and a method of production of the same.