Fuel cell system shunt regulator method and apparatus

H - Electricity – 01 – M

Patent

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Details

H01M 8/04 (2006.01) B60L 11/18 (2006.01) G05F 1/46 (2006.01) G05F 3/08 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2469412

A fuel cell system for powering a work load includes a fuel cell stack and a shunt regulator having a threshold detection; transistorized power switching element, and a dump load. The threshold detection element identifies when an abnormally high voltage rises. The power switching element routes power from the high voltage buss to the dump load. The dump load acts as an electrical energy sink, and may provide dissipated energy to the fuel cell stack in the form of heat. The switching element can also shunt power to the dump load when a digital control signal is set, for example at startup or during cold start conditions.

Système de pile à combustible destiné à alimenter une charge de travail, qui comprend une batterie de piles à combustibles et un régulateur de dérivation possédant une capacité de détection de seuil, un élément de commutation d'alimentation à transistors, et une charge de vidage. L'élément de détection de seuil identifie automatiquement les hausses de tension anormales. L'élément de commutation d'alimentation dirige l'alimentation du bus haute tension vers la charge de vidage. La charge de vidage agit comme un puits d'énergie électrique et peut alimenter la batterie de piles électriques en énergie dissipée sous forme de chaleur. L'élément de commutation peut aussi dériver la puissance vers la charge lorsqu'un signal de commande électrique est réglé, par exemple, au démarrage ou lors d'un démarrage à froid.

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