Control of electrolyte fill to fuel cell stack

Details Control of electrolyte fill to fuel cell stack Control of electrolyte fill to fuel cell stack

1981-09-21

1982-12-28

Lefevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 72, 429210, H01M 214

Patent

active

043662110

ABSTRACT:
A fuel cell stack which can be operated with cells in a horizontal position so that the fuel cell stack does not have to be taken out of operation when adding an electrolyte such as an acid. Acid is supplied to each matrix in a stack of fuel cells at a uniform, low pressure so that the matrix can either be filled initially or replenished with acid lost in operation of the cell, without exceeding the bubble pressure of the matrix or the flooding pressure of the electrodes on either side of the matrix. Acid control to each cell is achieved by restricting and offsetting the opening of electrolyte fill holes in the matrix relative to openings in the plates which sandwich the matrix and electrodes therebetween.

REFERENCES:
patent: 3615845 (1971-10-01), Gray
patent: 3748179 (1973-07-01), Bushnell
patent: 3814631 (1974-06-01), Warzawski et al.
patent: 3905832 (1975-09-01), Trocciola
patent: 3926676 (1975-12-01), Frie
patent: 4168349 (1979-09-01), Buzzelli

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