Fuel cell having coolant channel for cooling the fuel cell

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01) H01M 8/12 (2006.01)

Patent

CA 2547141

A fuel cell is made by laminating an anode channel 2 supplied with hydrogen or a hydrogen-containing gas G H, a cathode channel 3 supplied with oxygen or an oxygen-containing gas G O, and an electrolyte 4 arranged between the cathode channel and the anode channel. The electrolyte 4 is made by laminating a hydrogen separating metal layer for making hydrogen supplied to the anode channel 2 or hydrogen in a hydrogen-containing gas G H supplied to the anode channel 2 permeate; and a proton conductor layer made of ceramics, for establishing the hydrogen having permeated the hydrogen separating metal layer in a proton state and making it reach the cathode channel 3. In addition, the fuel cell has a coolant channel 5 for cooling the fuel cell 1. In the coolant channel 5, a low heat conducting section 55 having a heat conductivity smaller than that at a downstream side of a coolant C is formed at an inlet side of the coolant C.

Cette invention se rapporte à une pile à combustible (1) qui comprend un canal d'anode (2) dans lequel est introduit de l'hydrogène ou un gaz contenant de l'hydrogène (GH), un canal de cathode (3) dans lequel est introduit de l'oxygène ou un gaz contenant de l'oxygène (GO), et un corps d'électrolyte (4) disposé entre ces canaux. Le corps d'électrolyte (4) comporte une couche métallique de séparation d'hydrogène servant à transmettre l'hydrogène ou la teneur en hydrogène du gaz contenant de l'hydrogène (GH) introduit dans le canal d'anode (2) et une couche conductrice de protons composée d'une céramique permettant à l'hydrogène transmis par la couche métallique de séparation d'hydrogène d'atteindre le canal de cathode (3) sous la forme de protons. Cette pile à combustible (1) comprend en outre un canal de réfrigérant (5) servant à refroidir la pile à combustible. Ce canal de réfrigérant (5) comporte une partie à faible conductivité thermique (55) sur le côté entrée d'un réfrigérant (C). La conductivité thermique de cette partie à faible conductivité thermique (5) est inférieure à celle du côté aval du canal de réfrigérant (5).

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