Polymer electrolyte membrane fuel cell system comprising a...

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01) H01M 2/02 (2006.01) H01M 8/04 (2006.01) H01M 8/10 (2006.01) H01M 8/22 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2420158

The invention relates to a fuel cell system comprising a number of polymer electrolyte membrane individual fuel cells (2), which are arranged one above the other to form a stack (3). According to the invention, an intermediate space (10) for accommodating a cooling medium is provided between adjacent individual fuel cells (2) or adjacent individual fuel cells (2) are delimited by bipolar plates (7), which comprise passages (12) for receiving a cooling medium. In addition, cooling medium distribution spaces (15) and cooling medium collection spaces (18) are arranged on the lateral surfaces (23) of the stack. In order to cool the fuel cell system (1), cooling medium flows into a cooling medium distribution space (15) through the intermediate spaces situated between the individual fuel cells or through the passages located in the bipolar plates and, finally, the cooling medium flows into the cooling medium collection space from which it leaves the fuel cell system.

L'invention concerne un système de piles à combustible comportant une pluralité de piles à combustible individuelles à membrane électrolytique polymère (2), superposées sous forme d'empilement (3). Il est prévu dans chaque cas entre des piles à combustible individuelles (2) adjacentes, un espace intermédiaire (10) pour recevoir un agent réfrigérant ou bien des piles à combustible individuelles (2) adjacentes sont délimitées par des plaques bipolaires (7) qui présentent des passages (12) pour recevoir un agent réfrigérant. Des espaces de répartition d'agent réfrigérant (15) et des espaces collecteurs d'agent réfrigérant (18) sont disposés sur les faces latérales (23) de l'empilement. Pour refroidir le système de piles à combustible (1), un agent réfrigérant s'écoule dans un espace de répartition d'agent réfrigérant (15) à travers les espaces intermédiaires entre les piles à combustible individuelles ou les passages dans les plaques bipolaires et pour finir, dans un espace collecteur d'agent réfrigérant d'où il sort à nouveau du système de piles à combustible.

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