Sealing structure for fuel cell

Details Sealing structure for fuel cell Sealing structure for fuel cell

2005-03-29

2005-03-29

Alejandro, Raymond (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C429S006000

Reexamination Certificate

active

06872485

ABSTRACT:
A sealing structure in a fuel cell comprises a pair of separators including gas passages and a membrane electrode assembly held by the pair of separators and having a polymerized electrolytic membrane and a electrode layer so as to form a fuel cell. 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 a portion which is gradually narrowed toward an end thereof. A protrusion is provided to the sealing portion of the other separator, and a second seal having a constant width is provided to the front surface of the protrusion. The polymerized electrolytic membrane is held by the first seal and the second seal.

REFERENCES:
patent: 6057054 (2000-05-01), Barton et al.
patent: 6080503 (2000-06-01), Schmid et al.
patent: 6242124 (2001-06-01), Saito et al.
patent: 6348279 (2002-02-01), Saito et al.

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