Composition of fuel cell stack
The fuel cell stack is mainly composed of catalyst, proton exchange membrane, gas diffusion layer, bipolar plates, and other structural parts such as seals, end plates and collector plates. The membrane electrode and the bipolar plates on both sides of the membrane electrode form the basic unit of the fuel cell.
Bipolar plates as the core structural component
As the core structural component of fuel cell stack, bipolar plate plays the roles of supporting mechanical structure, evenly distributing gas, draining water, thermal conductivity and electrical conductivity, and its performance will directly affect the volume, output power and life of the stack. Bipolar plate can be divided into graphite bipolar plate, metal bipolar plate and composite bipolar plate. 2021 period, the domestic mainstream bipolar plate enterprises shipments have a very large amount of growth, its metal bipolar plate field has appeared a single enterprise single customer shipments up to 1 million pieces of the phenomenon.
At present, the ultra-thin stainless steel strip products have been used in hydrogen fuel cell bipolar plate, leading in the hydrogen fuel cell metal bipolar plate localization process, and domestic mainstream bipolar plate enterprises to cooperate in the development.