Hydrogen-air fuel cell

Details Hydrogen-air fuel cell Hydrogen-air fuel cell

1997-06-18

1998-07-07

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 34, H01M 804

Patent

active

057766258

ABSTRACT:
A reactant flow system for a proton exchange membrane (PEM), hydrogen-air, fuel cell stack, is described. The flow system includes the use of single-pass or multi-pass, flow channels. A flow channel section having at least one adjacent channel section whose reactant flows in an opposite direction thereto. The system has respective reactant inlets that are effectively adjacent to reactant outlets of the adjacent channel section. Restrictions are used at the reactant inlets to assure substantially uniform reactant flow among all of the flow channels. The PEM fuel cell stack has a mechanism for removing heat therefrom in order to prevent drying out of the electrolyte membrane.

REFERENCES:
patent: 4988583 (1991-01-01), Watkins et al.
patent: 5108849 (1992-04-01), Watkins et al.
patent: 5116696 (1992-05-01), Barp
patent: 5252410 (1993-10-01), Wilkinson et al.
patent: 5300370 (1994-04-01), Washington et al.
patent: 5527363 (1996-06-01), Wilkinson et al.
patent: 5549983 (1996-08-01), Yamanis
patent: 5641586 (1997-06-01), Wilson

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