Water management in fuel cells

H - Electricity – 01 – M

Patent

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

Patent

CA 2551674

An electrochemical fuel cell having an anode, an ion transfer membrane and a cathode has liquid water delivered to the fluid flow channels within the cathode so as to maintain a relative humidity of 100 % throughout the fluid flow channels. A calibration method and apparatus is described for determining an optimum quantity or range of quantities of liquid water to be delivered to the cathode fluid flow channels under varying operating conditions. An operating method and apparatus is described that ensures an optimum quantity of liquid water is delivered to the cathode fluid flow channels under varying operating conditions.

L'invention concerne une pile à combustible électrochimique comprenant une anode, une membrane à transfert d'ions et une cathode, de l'eau liquide étant distribuée dans les canaux d'écoulement de fluide de la cathode de manière à maintenir une humidité relative de 100 % dans les canaux d'écoulement de fluide. L'invention concerne également un procédé et un appareil de calibrage destinés à déterminer une quantité optimale ou une gamme de quantités d'eau liquide destinée à être distribuée dans les canaux d'écoulement de fluide de la cathode dans diverses conditions d'exploitation. L'invention concerne, en outre, un procédé et un appareil d'exploitation garantissant qu'une quantité optimale d'eau liquide est distribuée dans les canaux d'écoulement de fluide de la cathode dans diverses conditions d'exploitation.

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