Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1985-12-23
1987-02-17
Walton, Donald L.
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
429 34, 429 14, 429 16, H01M 810
Patent
active
046439544
ABSTRACT:
A device for equalizing the molten electrolyte content throughout the height of a fuel cell stack is disclosed. The device includes a passageway for electrolyte return with electrolyte wettable wicking material in the opposite end portions of the passageway. One end portion is disposed near the upper, negative end of the stack where electrolyte flooding occurs. The second end portion is placed near the lower, positive end of the stack where electrolyte is depleted. Heating means are provided at the upper portion of the passageway to increase electrolyte vapor pressure in the upper wicking material. The vapor is condensed in the lower passageway portion and conducted as molten electrolyte in the lower wick to the positive end face of the stack. An inlet is provided to inject a modifying gas into the passageway and thereby control the rate of electrolyte return.
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Final Report, EPRI RP-1085, (1983), At Section 8, Task 5, Development of roved Cell Stack Operating Stability.
Fisher Robert J.
Glenn Hugh W.
Hightower Judson R.
Marquis Steven P.
The United States of America as represented by the Department of
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