Fuel cell system

H - Electricity – 01 – M

Patent

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Details

H01M 8/04 (2006.01) H01M 16/00 (2006.01)

Patent

CA 2555951

A fuel cell system and a related operating method are disclosed. The system includes a fuel cell body 1 having an anode electrode supplied with fuel gas containing hydrogen and a cathode electrode supplied with oxidizer gas, a catalyst degradation-suppressing means operative to interrupt supplying oxidizer gas to the cathode electrode after disconnecting the external load from the fuel cell body 1 and allow a load current, generated by the fuel cell body 1, to be extracted by an internal load 26 while supplying fuel gas to the anode electrode, a hydrogen supply stop means operative to interrupt a supply of fuel gas to the anode electrode during a period in which the load current is extracted by the internal load, and load current control means controlling a taget load current such that after the supply of fuel gas to the anode electrode is stopped, a pressure inside the anode electrode is maintained at a target pressure.

Un systEme de pile A combustible et une mEthode de fonctionnement correspondante sont décrits. Le systEme comprend: un corps (1) de pile A combustible possédant une anode alimentEe en gaz combustible contenant de l'hydrogEne et une cathode alimentEe en gaz oxydant; un moyen de suppression de dégradation du catalyseur, conçu pour interrompre l'alimentation en gaz oxydant de la cathode après déconnexion de la charge externe du corps (1) de la pile A combustible et pour permettre l'extraction par une charge interne (26), du courant de charge produit par le corps (1) de la pile A combustible, alors que l'anode est alimentée en gaz combustible; un moyen d'arrEt de l'alimentation en hydrogEne conçu pour interrompre l'alimentation en gaz combustible de l'anode pendant une pEriode au cours de laquelle le courant de charge est extrait par la charge interne; et un moyen de régulation du courant de charge cible régulant le courant de charge, de sorte qu'après l'arrêt de l'alimentation en gaz combustible de l'anode, la pression A l'intErieur de l'anode soit maintenue A un niveau de pression cible.

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