Graphite composite material bipolar plate of flow battery and preparation method and device

The invention discloses a flow battery graphite composite material bipolar plate and a preparation method and device thereof, and the method comprises the following steps: uniformly mixing worm graphite powder, short carbon fiber and a resin solution to obtain a slurry-shaped mixture; rolling the mixed material body to obtain a prefabricated graphite composite material plate; and heating and softening the prefabricated graphite composite material plate, and rolling to obtain the graphite composite material bipolar plate with runners on two surfaces. According to the preparation method provided by the invention, the worm graphite powder and the short carbon fibers are mainly adopted as base materials and are uniformly mixed with the resin solution, the prefabricated graphite composite material plate is obtained through rolling, and the bipolar plate is obtained through heating and rolling, so that the mechanical properties of the worm graphite powder and the short carbon fibers are fully utilized; the resin is