Fuel cell system method and apparatus

H - Electricity – 01 – M

Patent

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H01M 8/04 (2006.01)

Patent

CA 2583549

A fuel cell system employs at least two fuel cell stacks electrically coupled in parallel to reduce the load turndown ratio of the fuel cell stacks. Fewer than all fuel cell stacks may be operated where the power demand permits. An oxidant supply subsystem may cease supplying oxidant to one of the fuel cell stacks to stop operation (power production) from the fuel cell stack. The fuel cell stacks may take turns at being the non-operating fuel cell stack.

L'invention concerne un système de pile à combustible formé d'au moins deux ensembles pile à combustible électriquement couplés en parallèle pour réduire le rapport de charge des ensembles pile à combustible. Un nombre inférieur au nombre total d'ensembles pile à combustible peut être exploité si la demande électrique le permet. Un sous-système d'alimentation d'oxydant peut arrêter d'alimenter en oxydant un des ensembles pile à combustible pour arrêter le fonctionnement (production de courant) de l'ensemble pile à combustible. Les ensembles pile à combustible peuvent chacun tour à tour être l'ensemble pile à combustible non exploité.

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