PLAQUE BIPOLAIRE POUR AMELIORER LE RENDEMENT D'UNE PILE A COMBUSTIBLE A MEMBRANE ECHANGEUSE DE PROTONS

The invention concerns a bipolar plate (5) for a proton-exchange membrane fuel cell (113), comprising: - an oxidiser inlet manifold and an oxidiser outlet manifold; - oxidiser flow channels (541) of an active area (54); - an inlet homogenisation area (52); - an exhaust homogenisation area; for a Reynolds number of the flow of oxidiser in the exhaust homogenisation area of between 1000 and 2000: - linear head losses through the exhaust homogenisation area make up more than 80% of the head losses dP2 between the active area (54) and the oxidiser outlet manifold; - the value dP2/dP1 is at least equal to 2, dP1 being the head losses between the oxidiser inlet manifold and the active area (54).