Internally gas regulated fuel cell

H - Electricity – 01 – M

Patent

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Details

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

Patent

CA 2492923

The active cell surface (bipolar plate) of a fuel cell is divided up into fields (1, 2), whereby at least one anode and cathode gas distributor structure is provided in each field. An inlet port (3a, 4a) enables the fresh anode gas or cathode gas to enter a first field (1), is then partially depleted by the fuel cell process occurring therein and is conducted to the outlet port (3b, 4b) of the field (1). After the fresh gas has been mixed, the depleted gas is conducted into the subsequent field (2) and is partially re- depleted by the fuel cell process occurring therein. Downstream fields can be re-enriched with fresh gas in the above-mentioned manner.

L'invention concerne une pile à combustible dans laquelle la surface de pile active (plaque bipolaire) est subdivisée en champs (1, 2) dont chacun comprend au moins une structure de répartition de gaz côté anode et côté cathode. Le gaz frais de l'anode ou de la cathode entre par une ouverture d'entrée (3a, 4a) dans un premier champ (1), y est partiellement appauvri par le processus de pile à combustible qui s'y déroule, puis est conduit à l'ouverture de sortie (3b, 4b) du champ (1). Le gaz appauvri est introduit dans la structure de conduit du champ suivant (2), éventuellement après ajout de gaz frais, et y est à nouveau partiellement appauvri par le processus de pile à combustible qui s'y déroule. Un nouvel enrichissement en gaz frais peut alors avoir lieu individuellement pour les champs situés en aval comme décrit ci-dessus.

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