Patent ID: 6428921
Filing Date: 2002-08-06
Classification: H01M,Y02E

Abstract:
An electro-chemical fuel cell stack comprising an upper end plate assembly, a lower end plate assembly, at least one electrochemical fuel cell assembly interposed between the upper and lower end plate assemblies, and clamp means operative to compressively clamp the stack, characterized in that at least one of said upper and lower end plate assemblies comprises:an end plate confronting the fuel cell assembly and pressed against the fuel cell assembly by the clamp means; a plurality of screws threaded through the end plate and bearing at a free end thereof against a confronting face of the fuel cell assembly, each of the screws being selectively moveable relative to the end plate in an axial direction generally transverse to the general plane of the end plate to an axial position and operative to maintain the axial position, whereby by a uniform compressive loading across a surface area of the fuel cell assembly is provided.