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:
May. 22, 2012
Filed:
Dec. 04, 2008
Applicants:
Takashi Asahina, Toyohashi, JP;
Shinji Hamada, Toyohashi, JP;
Toyohiko Eto, Toyota, JP;
Inventors:
Assignee:
Panasonic EV Energy Co., Ltd., Shizuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A secondary battery comprises a power generating element, a battery case including a gas release hole, and a valve safety device configured to close the gas release hole and release gas out of the battery case when inner pressure in the battery case exceeds a predetermined value. The safety valve device comprises a valve member and a holding member. The valve member includes a sealing portion hermetically making contact with a sealed surface around the gas release hole, and the holding member is fixed to the battery case to elastically press the sealing portion by its elastic deformation.