Patent ID: 6660422
Filing Date: 2003-12-09
Classification: H01M,Y02E,Y10T

Abstract:
A proton exchange membrane fuel cell assembly having a plurality of fuel cell component elements extending under compressive pressure between a pair of end plates, and having a reactant gas manifold, said elements having mutually uneven surfaces at ends thereof to which said manifold is to be sealed, comprising:one or more first seal parts applied to said mutually uneven surfaces and extending from one of said end plates to the other of said end plates at one or more corresponding regions of said mutually uneven surfaces to which said manifold is to be sealed, said first seal parts each having a surface facing said manifold which is relatively smooth and substantially coplanar with sealing surfaces of said end plates to which said manifold is to be sealed, said first seal parts consisting of silicone rubber of at least one type; and a second seal part comprising an elastomer disposed adjacent the entire contact perimeter surface of said manifold, said elastomer having a low compression set and a low compression modulus.