Coolant flow field plate for electrochemical fuel cells

Details Coolant flow field plate for electrochemical fuel cells Coolant flow field plate for electrochemical fuel cells

1991-09-26

1993-07-27

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 34, H01M 804

Patent

active

052309665

ABSTRACT:
A coolant flow field plate for use in association with a solid polymer fuel cell comprises, in a major surface, a coolant inlet, a coolant outlet, at least one coolant distribution channel in fluid communication with the coolant inlet and disposed near the perimeter of the plate. At least one central exhaust channel extends along a diagonal of the coolant flow field plate. The central exhaust channel is proximate to the center of the plate and in fluid communication with the coolant outlet. A plurality of coolant flow channels extend from the coolant distribution channels to the central exhaust channel. In the preferred embodiment, the coolant flow channels form a rib-cage pattern with the central exhaust channel. The coolant flow field plate is designed to increase the lifetime of solid polymer fuel cells by imposing lower temperatures near the periphery of the cell plates, and thereby protect the integrity of the seal where the reactant gases are sealed against external leakage.

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"Crossed-Linked Polyolefin Foams", William M. Allen Jan./Feb. 1984, pp. 70-71.
"Trocellen Cross-Linked Polyethylene Foam", The New Fashio in Foams for the 1980's.

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