Fuel cell system and method for production thereof

Details Fuel cell system and method for production thereof Fuel cell system and method for production thereof

H - Electricity

01

M

H01M 8/02 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2700938

High-power density (HPD) fuel cells are known from the prior art, wherein such cells can be constructed from cohesive, triangular-shaped and coated hollow structures (.DELTA.-cells). To form a group (bundle) of one complete fuel cell array, the individual HPD fuel cells must be electrically contacted together, wherein the contacting must absorb mechanical forces and thermal stresses. According to the invention, the contact consists of at least one hollow cord (11, 11'; 12, 12'; …, 80) which each has at least three contact surfaces with the .DELTA.- cell, of which two contact surfaces connect neighboring anode surfaces and the third contact surface connects the interconnector of the next HPD fuel cell.

On connaît, dans l'état de la technique, des piles à combustible à haute densité d'énergie (HPD - High Power Density), de telles piles pouvant être réalisées à partir de structures creuses contiguës, enduites et en forme de triangle ("cellules ?"). Pour former un groupe constitué d'un assemblage de piles à combustible complet, les piles à combustible HPD individuelles doivent être mises en contact électrique, cette mise en contact devant absorber des efforts mécaniques et des contraintes thermiques. Selon l'invention, le système de contact est composé d'au moins un cordon creux (11, 11'; 12, 12';..., 80) pourvu d'au moins trois surfaces de contact avec la cellule ?, deux de ces surfaces reliant des surfaces d'anode adjacentes et la troisième reliant l'interconnecteur de la pile à combustible HPD suivante.

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