Metal working – Method of mechanical manufacture – Electrical device making
Patent
1979-11-06
1982-07-06
Crane, Daniel C.
Metal working
Method of mechanical manufacture
Electrical device making
277 22, H01M 208, H01M 800
Patent
active
043375715
ABSTRACT:
A manifold-to-stack seal and sealing method for fuel cell stacks. This seal system solves the problem of maintaining a low leak rate manifold seal as the fuel cell stack undergoes compressive creep. The seal system eliminates the problem of the manifold-to-stack seal sliding against the rough stack surface as the stack becomes shorter because of cell creep, which relative motion destroys the seal. The seal system described herein utilizes a polymer seal frame firmly clamped between the manifold and the stack such that the seal frame moves with the stack. Thus, as the stack creeps, the seal frame creeps with it, and there is no sliding at the rough, tough to seal, stack-to-seal frame interface. Here the sliding is on a smooth easy to seal location between the seal frame and the manifold.
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Grevstad Paul E.
Johnson Carl K.
Mientek Anthony P.
Besha Richard G.
Carnahan L. E.
Crane Daniel C.
Denny James E.
The United States of America as represented by the United States
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