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. 27, 2008
Filed:
Mar. 21, 2003
Nobuhiro Hase, Mino, JP;
Hiroki Kusakabe, Sakai, JP;
Hideo Ohara, Katano, JP;
Shinsuke Takeguchi, Kadoma, JP;
Yoshiaki Yamamoto, Katano, JP;
Masayo Sugou, Legal Representative, Tokyo, JP;
Nobuhiro Hase, Mino, JP;
Hiroki Kusakabe, Sakai, JP;
Hideo Ohara, Katano, JP;
Shinsuke Takeguchi, Kadoma, JP;
Yoshiaki Yamamoto, Katano, JP;
Masayo Sugou, legal representative, Tokyo, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A decrease in voltage in a polymer electrolyte fuel cell comprising stack of unit cells caused by the temperature difference between the cells located at the ends and the other cells due to a differential in heat dissipation from end plates is prevented by controlling the cooling temperature of the cells closest to the end plates of the fuel cell without affecting the output voltage of the cells in the middle by not including a coolant flow channel in the conductive separator plate between at least one of the end plates and the unit cell located closest to the one of the end plates.