Fuel cell with polymer electrolyte

Details Fuel cell with polymer electrolyte Fuel cell with polymer electrolyte

H - Electricity

01

M

H01M 8/24 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2370104

A fuel cell (1) is provided with a central polymer membrane (2) that is provided with diffusion layers (3, 4) covering both sides and having plane electrodes (5, 6) supporting the back surface of said layers. The electrodes (5, 6) are provided with openings (15, 16) and rear covers (7, 8) with gas supplies (9, 10) for at least one of the plane electrodes (5, 6). At least two parallel extending gas flow channels (11, 12; 13, 14) sealed against each other are configured between at least one plane electrode (5, 6) and the cover (7, 8) pertaining thereto. Openings (15) in the plane electrode (6) extend from one gas flow channel (13) into the adjacent diffusion layer (4) and from the diffusion layer (4) into the other gas flow channel (14). The fuel cell (1) is provided with a greater dimension lengthwise in the main extension direction of the gas flow channels (11, 13) than vertical thereto.

Pile (1) à combustible qui comporte une membrane polymère centrale (2), des couches de diffusion (3, 4) couvrant la membrane polymère (2) des deux côtés, des électrodes plates (5, 6) soutenant la surface arrière des couches de diffusion (3, 4) et dotées d'orifices (15, 16), ainsi que des éléments arrière de couverture (7, 8) dotés de raccords (9, 10) pour arrivée de gaz pour au moins une des électrodes plates (5, 6). Entre l'électrode plate (5, 6) et l'élément de couverture (7, 8) associé sont formés au moins deux canaux (11, 12; 13, 14) d'acheminement de gaz parallèles et séparés de manière étanche, les orifices (15) ménagés dans l'électrode plate menant d'un canal (13) d'acheminement de gaz dans la couche de diffusion adjacente (4) et de ladite couche de diffusion (4) dans l'autre canal (14) d'acheminement de gaz. La présente pile (1) à combustible possède une plus grande dimension dans le sens principal d'extension des canaux (11, 13) que perpendiculairement à ces canaux.

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