Fuel cell manifold sealing system

Details Fuel cell manifold sealing system Fuel cell manifold sealing system

1979-04-06

1980-07-15

LeFevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429185, H01M 208

Patent

active

042129290

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.

REFERENCES:
patent: 3206332 (1965-09-01), Juda
patent: 3235407 (1966-02-01), Nicholson et al.
patent: 3436272 (1969-04-01), Gelting
patent: 3442714 (1969-05-01), Matsuno
patent: 3575719 (1971-04-01), Nelson et al.
patent: 3589941 (1971-06-01), Eaton et al.
patent: 3615838 (1971-10-01), Erickson

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