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:
Aug. 04, 2015
Filed:
Dec. 26, 2008
Masato Komatsuki, Gifu-ken, JP;
Takashi Nakazawa, Toyota, JP;
Kaoru Yugahara, Toyota, JP;
Hiroya Kondou, Toyohashi, JP;
Takato Fujiki, Suzuka, JP;
Masato Komatsuki, Gifu-ken, JP;
Takashi Nakazawa, Toyota, JP;
Kaoru Yugahara, Toyota, JP;
Hiroya Kondou, Toyohashi, JP;
Takato Fujiki, Suzuka, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
A cell assembly () is formed by arranging an electrode body and electrolyte in an external case () having a through hole (). A laser is applied to an annular portion (formed by Al or Al-based alloy) surrounding an opening end (A) of the through hole () toward outside the case so as to form a welded base (). A sealing film () is welded to the surface of the welded base directly or via a base film () welded in advance, so as to temporarily seal the through hole (). The cell assembly () in the temporarily sealed state is subjected to initial charge and then a hole is opened through the film () so as to form a gas discharge passage for communication between inside and outside of the case (), thereby discharging an excessive gas from the case () outside.