CPC H01M 8/0263 (2013.01) [H01M 8/0265 (2013.01); H01M 8/0267 (2013.01); H01M 8/04029 (2013.01); H01M 8/04156 (2013.01); H01M 8/04701 (2013.01); H01M 8/1004 (2013.01); H01M 2008/1095 (2013.01); H01M 2250/20 (2013.01)] | 9 Claims |
1. Bipolar conductive plate suitable for being inserted into a fuel cell structure, said plate comprising:
a first sheet, including grooves formed therein and having a front face forming a first outer face of the bipolar conductive plate, the grooves of the first sheet forming a first array of one or more fluid circulation channels, for circulation of a fluid therethrough, said one or more fluid circulation channels being formed on the first outer face, wherein said one or more fluid circulation channels are arranged in parallel and each having a path in the form of a succession of undulations on either side of an axis parallel with a longitudinal axis of the bipolar conducting plate, the undulations creating a succession of peaks and troughs,
a second sheet, including grooves formed therein and having a front face forming a second outer face of the bipolar conductive plate, the grooves of the second sheet forming, on the second outer face, a second array of one or more fluid circulation channels arranged in parallel,
wherein the first sheet has a rear face, opposite to the front face and to said one or more fluid circulation channels of the first sheet and the second sheet has a rear face, opposite to said one or more fluid circulation channels of the second sheet, the rear face of the first sheet being in contact with the rear face of the second sheet at contact zones of the bipolar conductive plate, and
wherein said one or more fluid circulation channels of the first sheet include, for the circulation of the fluid, main portions and portions of contracted cross-section, which have a cross section at least divided by two compared to the cross-section of the main portions,
wherein said portions of contracted cross-section are distributed at the peaks or troughs of the undulations of the channels.
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