Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1989-09-08
1991-04-23
Walton, Donald L.
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
429 35, H01M 802, H01M 824
Patent
active
050099680
ABSTRACT:
The end plates (16) of a fuel cell stack (12) are formed of a thin membrane. Pressure plates (20) exert compressive load through insulation layers (22, 26) to the membrane. Electrical contact between the end plates (16) and electrodes (50, 58) is maintained without deleterious making and breaking of electrical contacts during thermal transients. The thin end plate (16) under compressive load will not distort with a temperature difference across its thickness. Pressure plate (20) experiences a low thermal transient because it is insulated from the cell. The impact on the end plate of any slight deflection created in the pressure plate by temperature difference is minimized by the resilient pressure pad, in the form of insulation, therebetween.
REFERENCES:
patent: 3442714 (1969-05-01), Matsuno
patent: 3779811 (1973-12-01), Bushnell et al.
patent: 4719157 (1988-01-01), Tsutsumi et al.
Guthrie Robin J.
Katz Murray
Schroll Craig R.
International Fuel Cells Corporation
Kochey Jr. Edward L.
Walton Donald L.
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