JOINING METHOD OF FUEL CELL STACK, WHICH CAN PERFORM THE JOINING IN THE CENTER AS WELL AS THE OUTSIDE

摘要

PURPOSE: A joining method of a fuel cell stack is provided, which can perform the joining in the center as well as the outside, therefore disperses excessive force to the outside equally, prevents a channel plate and a header from being bended, and reduces a contact resistance between an electrolyte-electrode assembly and the channel plate. CONSTITUTION: The joining method of the fuel cell stack is performed by forming sections(18), on which gas channels(12) are not formed, in the center or the outside of the channel plate; forming a central joining hole(15) and a plurality of outside joining holes(14) in the sections(18) to insert joining sticks(17) therein; inserting the joining sticks(17); and then fastening by headers on the both sides of the stack. Manifolds(13) for gas or liquid are formed between the outside joining holes(14).