Fluid-cooled fuel cell with distribution ducts

Details Fluid-cooled fuel cell with distribution ducts Fluid-cooled fuel cell with distribution ducts

H - Electricity

01

M

H01M 8/02 (2006.01) H01M 8/24 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2243703

The invention concerns a fluid-cooled fuel cell in which the cell surfaces are supplied with reaction media via axial supply (54, 55, 56) and radial distribution ducts (54a, 55a, 56a). The distribution ducts lie in the cell surface and extend along the cell surface edge with the open side facing the active surface. According to the invention, the supply and distribution ducts are disposed in a fuel cell stack such that distribution ducts in the edge region of the cell surfaces are stacked and staggered such that the flow of medium onto the cell surface does not occur at given points along a distribution duct but such that the entire cell surface is supplied uniformly with medium.

L'invention concerne une cellule électrochimique refroidie par liquide, dans laquelle les surfaces sont alimentées en substances de réaction par l'intermédiaire de canaux axiaux d'alimentation (54, 55, 56) et de canaux radiaux de répartition (54a, 55a, 56a). Les canaux de répartition se situent dans la surface de la cellule et le long de l'arête de la surface de ladite cellule, la face ouverte étant dirigée vers la surface active. Selon l'invention, les canaux d'alimentation et de répartition sont disposés en une pile de cellules électrochimiques, de manière que les canaux de répartition soient empilés et échelonnés dans la zone marginale des surfaces des cellules, afin que, par endroits, l'arrivée de la substance sur la surface des cellules ne s'effectue pas le long d'un canal de distribution et que l'ensemble de la surface des cellules soit alimentée de manière homogène en substance.

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