Operating concept for direct methanol fuel cells

Details Operating concept for direct methanol fuel cells Operating concept for direct methanol fuel cells

H - Electricity

01

M

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

Patent

CA 2371521

The inventive operating concept is provided for effecting the cold start of direct methanol fuel cells. According to the invention, the air is ousted from the cathodes by the residual gas located in the anodes after disconnecting the load (during the preceding operating phase). In addition, cathodic hydrogen is produced by feeding electric energy and is stored. For the start up, air is fed to the cathodes and hydrogen is fed to the anodes during the short-circuit operation. The operation is switched to methanol operation once the operating temperature is reached.

L'invention concerne un procédé pour faire fonctionner des piles à combustible directes au méthanol, notamment pour leur démarrage à froid. Selon ce procédé, après coupure de la charge (lors de la phase de fonctionnement précédente), l'air est expulsé des cathodes par le gaz résiduel présent au niveau des anodes, et de l'hydrogène est formé cathodiquement par apport d'énergie électrique, avant d'être stocké. Pour la mise en marche, de l'air est acheminé aux cathodes et de l'hydrogène aux anodes, en court-circuit, puis, une fois la température de service atteinte, le passage au mode de fonctionnement au méthanol est effectué.

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