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. 22, 2014
Filed:
Jun. 11, 2008
Shinji Hamada, Toyohashi, JP;
Hideki Kasahara, Ikeda, JP;
Shinichiro Ito, Kosai, JP;
Hideki Ando, Toyohashi, JP;
Toyohiko Eto, Toyota, JP;
Shinji Hamada, Toyohashi, JP;
Hideki Kasahara, Ikeda, JP;
Shinichiro Ito, Kosai, JP;
Hideki Ando, Toyohashi, JP;
Toyohiko Eto, Toyota, JP;
Panasonic EV Energy Co., Ltd., Kosai, JP;
Abstract
A nickel-metal hydride secondary battery includes: a plurality of power generating elements each having a negative plate containing hydrogen absorbing alloy; a battery case provided with partition walls and a plurality of compartments arranged adjacently on both sides of each partition wall, each of the compartments accommodating each power generating element, and the compartments allowing gas intercommunication between compartments through communication holes formed in the partition walls; and at least one of safety valves placed on the battery case, the safety valves being less in number than the number of the compartments; wherein each of the communication holes has a hole sectional area per battery module capacity in a range 0.03 to 0.30 mm/Ah.