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:
Mar. 22, 2005
Filed:
Dec. 27, 2002
Kazuhito Hatoh, Daito, JP;
Eiichi Yasumoto, Katano, JP;
Kazufumi Nishida, Moriguchi, JP;
Hisaaki Gyoten, Shijonawate, JP;
Teruhisa Kanbara, Ikeda, JP;
Hideo Ohara, Kadoma, JP;
Makoto Uchida, Hirakata, JP;
Yasushi Sugawara, Neyagawa, JP;
Toshihiro Matsumoto, Ibaraki, JP;
Kazuhito Hatoh, Daito, JP;
Eiichi Yasumoto, Katano, JP;
Kazufumi Nishida, Moriguchi, JP;
Hisaaki Gyoten, Shijonawate, JP;
Teruhisa Kanbara, Ikeda, JP;
Hideo Ohara, Kadoma, JP;
Makoto Uchida, Hirakata, JP;
Yasushi Sugawara, Neyagawa, JP;
Toshihiro Matsumoto, Ibaraki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A polymer electrolyte fuel cell stack that includes a cell laminate having a plurality of unit cells, which are laid one upon another and each of which includes a polymer electrolyte membrane, a pair of electrodes arranged across the polymer electrolyte membrane and having respective catalytic reaction layers, a separator having means for feeding a supply of fuel gas containing hydrogen gas to one of the electrodes, another separator having means for feeding a supply of oxidant gas to the other of the electrodes, and a manifold for feeding the supply of fuel gas or the supply of oxidant gas to the respective electrode and disposed on a side face of each unit cell. In the polymer electrolyte fuel cell stack, a sealing portion is disposed at least in the vicinity of each electrode. The polymer electrolyte fuel cell stack has excellent durability and productivity. Gasket sealing portions, a sealing portion for cooling water, and sealing portions for water and gas in an internal humidifying unit are composed of a polymer compound that has polyisobutylene as the backbone structure. This arrangement ensures high reliability.