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. 25, 2017
Filed:
Mar. 27, 2014
Soode Nagano Co., Ltd., Nagano, JP;
Nippon Light Metal Company, Ltd., Tokyo, JP;
Nikkeikin Aluminium Core Technology Company Ltd., Tokyo, JP;
Keiji Kanamori, Tokyo, JP;
Shinichi Nomura, Tokyo, JP;
Yoshihiko Moriyama, Tokyo, JP;
Takayuki Sode, Nagano, JP;
Yukinori Sugiyama, Nagano, JP;
SOODE NAGANO CO., LTD., Nagano, JP;
NIPPON LIGHT METAL COMPANY, LTD., Tokyo, JP;
NIKKEIKIN ALUMINIUM CORE TECHNOLOGY COMPANY LTD., Tokyo, JP;
Abstract
A battery case provided with a safety valve () in which a breakage groove () is used, wherein in order to stabilize the operation pressure, a lid () of the battery case has formed thereon: a thin plate portion () obtained by thinning a plate part (); and a first recessed part () comprising a curved part () in which the thin plate portion () is indented inward, with respect to the case, in a curved shape. The breakage groove () for the safety valve () is formed at the bottom part () of the curved part (). A first connecting portion () and a second connecting portion () of the plate part (), which connect to the curved part () on both sides flanking the curved part (), are at positions protruding toward the outside of the case from the plate part ().