Method for localising a gas leak in a fuel cell system

Details Method for localising a gas leak in a fuel cell system Method for localising a gas leak in a fuel cell system

H - Electricity

01

M

H01M 8/04 (2006.01)

Patent

CA 2456089

Undetected gas leaks in a fuel cell can lead to a fire inside the fuel cell and thus to the destruction of said fuel cell. The invention relates to a method for localising a gas leak inside a fuel cell system (1) comprising a number of fuel cells. After supplying (21) the fuel cells with the fuel gases, the fuel gas supply to at least one of the two gas chambers of the fuel cells is interrupted (25), the gas chamber which is separated from the fuel gas supply is rinsed with an inert gas (29), the fuel cells are brought into electrical contact (31) with a discharging resistor (13) or are already in contact therewith, and the cell voltage of the fuel cells is monitored.

Les fuites de gaz non décelées dans une cellule électrochimique peuvent provoquer un incendie dans la cellule électrochimique, entraînant ainsi la destruction de cette cellule électrochimique. L'invention concerne un procédé permettant de localiser une fuite de gaz dans un système de cellules électrochimiques (1) comportant un certain nombre de cellules électrochimiques. Après alimentation (21) des cellules électrochimiques en gaz de combustion, l'apport en gaz de combustion dans au moins un des deux compartiments de gaz des cellules électrochimiques est interrompu (25), le compartiment de gaz de la cellule électrochimique séparé de l'alimentation en gaz est rincé par un gaz inerte (29) puis les cellules électrochimiques sont mises en contact électrique (31) par une résistance de décharge (13) ou bien sont prêtes et la tension des cellules électrochimiques est surveillée.

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