Method for starting a fuel cell system, as well as a fuel...

B - Operations – Transporting – 60 – L

Patent

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Details

B60L 11/18 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2328779

The invention relates to a method for starting a mobile fuel cell system, in particular for a vehicle, in which the air which is to be supplied to the system is conveyed during starting and operation of the system by a motor-powered compressor (2), in order to ensure the necessary operating pressure and, if required, additional humidifying of the air. The motor drive for the compressor (2) has an electric motor (4, 20) which is supplied from a mobile starter battery (5) during the starting phase. The output voltage of the starter battery (5) is different to the operating voltage at the output of the fuel cell stack (1) of the fuel cell system, with a control device (10) being provided between the output of the starter battery (5) or of the fuel cell stack (1) and the motor input (8), which control device (10) interrupts the starting voltage supplied from the output (6) of the starter battery (5) and switches over to the output voltage of the fuel cell stack (1) when the output operating voltage of the fuel cell stack (1) reaches an adequate level.

L'invention concerne un procédé qui permet de faire démarrer un dispositif mobile à cellules électrochimiques, notamment un véhicule. Selon le procédé, l'air est amené audit dispositif, lors du démarrage et durant le fonctionnement, par un compresseur (2) entraîné par un moteur de façon à fournir la pression de fonctionnement nécessaire et éventuellement à assurer une humidification supplémentaire de l'air. L'entraînement motorisé du compresseur (2) comporte un moteur électrique (4, 20), qui est alimenté durant la phase de démarrage par une batterie de démarrage (5) mobile. La tension de sortie de ladite batterie (5) est différente de la tension de fonctionnement à la sortie de la pile (1) de cellules électrochimiques du dispositif. Un dispositif de commande (10), placé entre la sortie de la batterie de démarrage (5) ou de la pile (1) et l'entrée (8) du moteur, interrompt la tension de démarrage amenée depuis la sortie (6) de ladite batterie (5) lorsqu'une tension de fonctionnement suffisante a été atteinte à la sortie de la pile (1) et commute sur la tension de sortie de cette dernière.

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