Flow field

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01)

Patent

CA 2514630

An article bearing a flow field such as a distribution plate for use in a fuel cell is provided. The active portion of the article, i.e., the portion of the article bearing the flow field, comprises at least two subsections; a first central subsection and a second peripheral subsection; wherein channels within the first subsection have a cross-sectional profile that differs from that of channels within the second subsection. Typically, channels of the first subsection have lesser depth, greater draft or greater ratio of draft to depth. In addition, an article bearing a flow field is provided where the flow field comprises at least two channel segments which differ in draft. In addition, an article bearing a flow field is provided where the flow field comprises at least one channel segment comprising first and second channel walls which differ in draft.

L'invention concerne un article porteur d'un champ de courant, tel qu'une plaque distributrice destinée à utilisée sur une pile à combustible. La partie active de l'article, c'est-à-dire, la partie de l'article porteuse du champ de courant, comprend au moins deux sous-sections ; une première sous-section centrale et une seconde sous-section périphérique. Des canaux ménagés dans la première sous-section présentent un profil transversal qui diffère de celui des canaux ménagés dans la seconde sous-section. Généralement, les canaux de la première sous-section présentent une profondeur moindre, un plus grand tirage ou un plus grand rapport tirage-profondeur. L'invention concerne également un article porteur d'un champ de courant dans lequel le champ de courant comprend au moins deux segments de canal qui possèdent un tirage différent. L'invention concerne en outre un article porteur d'un champ de courant dans lequel le champ de courant comprend au moins un segment de canal comportant une première et une seconde parois de canal qui possèdent un tirage différent.

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