Metal bipolar plate flow field system of proton exchange membrane fuel cell

The utility model discloses a metal bipolar plate flow field system of a proton exchange membrane fuel cell and belongs to the technical field of fuel cells. The bipolar plate is of a three-layer structure formed by connecting an anode monopole plate, a cathode monopole plate and a middle partition plate, and a fuel flow field, an oxidizing agent flow field, a cooling liquid flow field II and a cooling liquid flow field I are formed respectively. According to the metal bipolar plate flow field system of the proton exchange membrane fuel cell, an anode flow field reserves the advantages of small pressure drop of multiple paths of serpentine flow channels and good gas diffusivity of interdigital flow channels; the cathode flow field reserves multiple paths of snake-shaped flow channels for exhausting, so that the pressure is reduced conveniently, and meanwhile, the convex hulls enable an oxidant flowing in the flow channels to be diffused to a diffusion layer to improve the battery power; the two groups of doub