A system for purging non-fuel material from fuel cell anodes

H - Electricity – 01 – M

Patent

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Details

H01M 8/04 (2006.01) H01M 8/22 (2006.01) H01M 8/24 (2006.01) H01M 16/00 (2006.01)

Patent

CA 2713022

A fuel cell gas purge system is provided that includes at least one fuel cell, such as a fuel cell stack or a fuel cell array, a fuel supply, and an adjustable fuel cell current load. The system further includes at least one passive purge valve disposed to purge accumulated non-fuel matter in the fuel cell, and operates according to a pressure differential across the valve. The valve can be a passive bi-directional valve, such as a dome valve, or a passive unidirectional valve. Further included is a purge management module that has a purge request module to determine when to increase the pressure of the hydrogen fuel to initiate the purge, and a purge complete module to determine when to adjust the pressure of the hydrogen fuel to complete the purge. The non-fuel matter can include non-fuel gases or condensed water.

L'invention concerne un système de purge de gaz combustible. Ce système comprend au moins une pile à combustible, notamment un empilement de piles à combustible ou un réseau de piles à combustible, une réserve de combustible, et une charge de courant de pile à combustible réglable. Le système comprend également au moins une soupape de purge passive placée de manière à purger la matière non combustible accumulée dans la pile à combustible, et fonctionne selon un différentiel de pression généré au niveau de la soupape. La soupape peut être une soupape bidirectionnelle passive, une soupape à boisseau ou une soupape unidirectionnelle passive. L'invention concerne également un module de gestion de purge présentant un module de demande de purge servant à déterminer le moment où augmenter la pression du combustible hydrogène pour lancer la purge, et un module de terminaison de purge servant à déterminer le moment où réguler la pression du combustible hydrogène pour terminer la purge. La matière non combustible peut comprendre des gaz non combustibles ou de l'eau condensée.

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