Method of operating a fuel cell system, and fuel cell system...

H - Electricity – 01 – M

Patent

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Details

H01M 8/04 (2006.01) H01M 4/86 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2376083

For simplifying cooling of a fuel cell system which may be a single cell (1), a stack (15) or a similar configuration and which comprises at least one active membrane (2) sandwiched between an anode layer (4) and a cathode layer (3) and comprising a catalyst, a fuel supply having access to the anode layer and an air supply (17, 18) having access to the cathode layer, while at the same time keeping the effectivity of the system with reference to energy conversion, volume and weight favourable, the fuel cell system is to be operated such that the air which is supplied by the air supply, is introduced by pressure into the fuel cell system, passes along the cathode layer and then leaves the fuel cell system, is used for both oxidant and coolant. For this purpose, the air is introduced into the fuel cell system (1, 15) with a rate resulting in a stoichiometric rate in the range between 25 and 140.

L'invention concerne un procédé permettant de simplifier le refroidissement d'un système de pile à combustible constitué d'une seule cellule (1), d'une pile (15), ou d'une configuration similaire. Ce système comprend au moins une membrane active (2) prise en sandwich entre une couche cathode (4) et une couche anode (3); un catalyseur; une alimentation de combustible ayant accès à la couche anode; et une alimentation d'air (17, 18) ayant accès à la couche cathode. Ledit système conserve son efficacité en ce qui concerne la conversion d'énergie, son volume et son poids. Le système fonctionne de sorte que l'air fourni par l'alimentation d'air est introduit par pression dans le système de pile à combustible, passe le long de la couche cathode, puis quitte le dit système, cet air étant utilisé à la fois comme oxydant et comme réfrigérant. De ce fait, l'air est introduit dans le système (1, 15) de pile à combustible à une vitesse produisant une vitesse stoechiométrique située entre 25 et 140.

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