Bipolar plate having integrated gas-permeable membrane

H - Electricity – 01 – M

Patent

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Details

H01M 8/00 (2006.01) B01D 53/22 (2006.01) H01M 8/02 (2006.01) H01M 8/04 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2478309

The present invention is directed to a novel anode plate forming an anode chamber of a fuel cell. The anode plate includes an anode fuel flow field, a substantially gas permeable membrane, and a channel coupled to an outlet positioned immediately adjacent said membrane. The channel directs gaseous effluents produced in the anode chamber out of the fuel cell via the outlet. This novel anode plate may be used in a single fuel cell, electrically and mechanically coupled to a cathode plate in a multi-fuel cell arrangement, or combined with a cathode plate producing a bi-polar plate for a fuel cell stack. Alternatively, the features of the anode plate and cathode plate may be integrated into a single component, thus improving performance and limiting the size of a stack ad system implementing said stack.

La présente invention concerne une nouvelle plaque d'anode formant une chambre anodique d'une pile à combustible. Cette plaque d'anode comporte un champ anodique d'écoulement du combustible, une membrane sensiblement perméable aux gaz, et un canal couplé à un orifice de sortie venant directement contre cette membrane. Le canal guide hors de la pile à combustible via l'orifice les effluents gazeux produits dans la chambre anodique. Cette nouvelle plaque d'anode peut s'utiliser dans une simple pile à combustible, électriquement et mécaniquement couplée à la plaque de cathode dans un montage de plusieurs piles à combustibles, ou combinée avec une plaque de cathode produisant une plaque bipolaire pour un empilement de piles à combustible. Selon un autre mode de réalisation, les caractéristiques de la plaque d'anode et de la plaque de cathode peuvent être réunies dans un unique composant, ce qui améliore les performances et limite la taille d'un empilement et d'un système mettant en oeuvre un tel empilement.

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