Fuel cell stack

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2428317

The invention relates to a fuel cell stack with gaseous fuel, comprising a membrane electrode unit (8) and a distribution sheet (1), comprising a channel region (2) with gas channels (3) for the distribution of the anode or cathode gases the membrane electrode unit (8) and a port region (4) for introduction of the anode and cathode gas into the channel region (2). According to the invention, additional connection channels (6) from the port regions (4) open out along the gas channels (3) such that unused anode or cathode gas from the port regions (4) may be locally dosed into the gas channels (3) by means of said connection channels (6).

L'invention concerne un empilement de piles à combustible, à combustible gazeux, comprenant un groupe d'électrodes à membrane (8) et une plaque distributrice (1) comportant une zone de conduits (2), à savoir des conduits de gaz (3) pour la répartition du gaz anodique ou cathodique dans le groupe d'électrodes à membrane (8), et une zone d'accès (4) pour l'amenée du gaz anodique et cathodique dans ladite zone de conduits (2). L'invention est caractérisée en ce que des conduits de liaison supplémentaires (6) provenant des zones d'accès (4) débouchent le long des canaux de gaz (3), de telle façon qu'au moyen de ces conduits de liaison (6), le gaz anodique ou cathodique inutilisé provenant des zones d'accès soit localement envoyé en quantités dosées dans les conduits de gaz (3).

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