Fuel cell system and method for stopping operation of fuel...

H - Electricity – 01 – M

Patent

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Details

H01M 8/04 (2006.01) H01M 8/06 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2518416

Durability of a fuel cell sometimes decreases due to deterioration of the catalyst when the fuel cell is stored for a long time. Disclosed is a fuel cell system comprising a stack (38) for generating electric power from a fuel gas and an oxidant, a fuel gas supplying means, an oxidant gas supplying means, a raw material gas supplying means including a raw material gas piping (33), a bypass pipe (55) and distributors (56, 60) for supplying a raw material of the fuel gas to a fuel cell, and a control unit (44). After power output of the fuel cell is turned off, the fuel gas supplying means stops supplying the fuel gas to the anode side of the fuel cell and the oxidant gas supplying means stops supplying the oxidant to the cathode side of the fuel cell, while the raw material gas supplying means supplies the raw material from the input side of the cathode of the fuel cell, thereby purging the cathode side of the fuel fell.

La durabilité d'une pile à combustible diminue parfois à cause de la détérioration du catalyseur, lorsque la pile à combustible est entreposée pendant une longue durée. On décrit une pile à combustible qui comprend une pile (38) destinée à générer de l'énergie électrique à partir d'un gaz combustible et d'un gaz comburant; un moyen d'alimentation en gaz combustible; un moyen d'alimentation en gaz comburant; un moyen d'alimentation en gaz matière première comprenant une conduite de gaz matière première (33); une conduite de dérivation (55) et des distributeurs (56, 60) pour alimenter une pile à combustible en comburant matière première; et une unité de commande (44). Une fois la puissance utile de la pile à combustible mise hors tension, le moyen d'alimentation en gaz combustible cesse d'alimenter en gaz combustible le côté anode de la pile à combustible, et le moyen d'alimentation en gaz comburant cesse d'alimenter en comburant le côté cathode de la pile à combustible, tandis que le moyen d'alimentation en gaz matière première achemine la matière première depuis le côté admission de la cathode de la pile à combustible, purgeant ainsi le côté cathode de la pile à combustible.

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