Improvement of flow distribution characteristics of fuel cell

H - Electricity – 01 – M

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Details

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

Patent

CA 2587673

A fuel cell has single cells and gas manifolds that communicate between the single cells. The single cells each have electrodes and separators. The separators each have, in their insides, a gas communication flow path for communicating a gas passage, present in the surfaces of the electrode, and the gas manifolds. The gas communication flow paths each have at least one gas communication hole opened on that surface side of the separator which faces an electrode. The gas communication hole provided for each of the gas communication flow paths includes a first communication hole group disposed at a position separated a small distance from the gas manifolds and a second communication hole group disposed at a position separated a greater distance from the gas manifolds than the first communication hole group.

L~invention concerne une pile à combustible comportant des piles individuelles et des collecteurs de gaz qui assurent la communication entre lesdites piles. Celles-ci comportent chacune des électrodes et des séparateurs. A l~intérieur de chacun des séparateurs se trouve un chemin d~écoulement de communication du gaz permettant de faire communiquer un passage pour le gaz présent dans les surfaces de l~électrode et les collecteurs de gaz. Les passages d~écoulement de communication du gaz présentent chacun au moins un trou de communication du gaz ouvert sur le côté de surface du séparateur qui est orienté vers une électrode. Ce trou prévu pour chacun des chemins d~écoulement de communication du gaz comprend un premier groupe de trous de communication placé au niveau d~une position séparée par une petite distance des collecteurs de gaz et un second groupe de trous de communication placés au niveau d~une position séparée par une plus grande distance des collecteurs de gaz que le premier groupe.

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