Patent ID: 6872485
Filing Date: 2005-03-29
Classification: H01M,Y02E

Abstract:
1. A sealing structure for a fuel cell comprising: a pair of separators including gas passages; a membrane electrode assembly held by the pair of separators and having a polymerized electrolytic membrane and an electrode layer so as to form a fuel cell; wherein the sealing structure seals a sealing portion between the pair of the separators and the polymerized electrolytic membrane; a sealing groove is provided to the sealing portion of one of the separators, and a first seal has a thickness greater than the depth of the sealing groove and the first seal having a first end disposed in the sealing groove and having a first width, and a second end distal from the sealing groove and having a second width that is narrower than the first width, wherein a portion of the first seal is gradually narrowed toward the second end; a protrusion is provided to the sealing portion of the other separator, and a second seal having constant width is provided to the front surface of the protrusion; and the polymerized electrolytic membrane is held by the first and second seal.