| 摘要 |
A repeating unit (10) for a fuel cell stack comprises a gas conducting region (8) for conducting a first gas (12) to and along an active surface (14). A barrier (16) is located in the gas conducting region. The gas conducting region comprises, at least over the active surface, a plurality of channels (20, 22, 24, 26, 28, 30, 32, 34) for conducting the first gas along the active surface. At least a first channel (26) among the plurality of channels defines a first flow direction at a first point (46) located closest to the barrier and a second flow direction at a second point (48), wherein a first straight line (50) which extends through the first point (46) and is parallel to the first flow direction misses the barrier (16) while a second straight line (52) which extends through the second point (48) and is parallel to the second flow direction intersects the barrier. The barrier (16) can he located upstream or downstream of the active surface (14). |
