Cascade-type fuel cell stack unified with humidifiers

摘要

PURPOSE: A humidifier-combined multi-stage type fuel cell stack is provided to diversify designs of a manifold, to reduce production cost, and to optimize flow of gas while reducing a volume of a stack by integrating a humidifier. CONSTITUTION: A humidifier-combined multi-stage type fuel cell stack comprises one unit cell formed by overlapping a separator to both sides around a membrane electrode assembly in order to generate electricity through a chemical reaction of oxygen and hydrogen. The unit cells are stacked to multi layers to form a stack. In the middle of the stack, at least one or more intermediate gas supply plates(121,122) in which current flows through a center part and having external gas channel to outside the stack is formed. To at least one end of the stack, a humidifier is combined around a side gas supply plate(123,124) which has an external gas channel to outside the stack. [Reference numerals] (AA) Fuel gas in(H2); (BB, FF) Moisturizing water out; (CC) Fuel gas(H2) out; (DD) Oxidation gas(O2) in; (EE) Moisturizing water in; (GG) Oxidation gas(O2) out