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. 11, 2003
Filed:
Feb. 02, 2000
Kazuhito Hatoh, Daito, JP;
Eiichi Yasumoto, Kantano, 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-fu, JP;
Abstract
The present invention provides 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 that are arranged across the polymer electrolyte membrane and respectively have a catalytic reaction layer, a separator having means for feeding a supply of fuel gas containing hydrogen gas to one of the electrodes, and another separator having means for feeding a supply of oxidant gas to the other of the electrodes. 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 of the present invention 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 constituted by a polymer compound that has polyisobutylene as the backbone structure. This arrangement ensures the high reliability.