초록 ▼

An electrochemical 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 a clamp mechanism operative to compressively clamp the stack. A plurality of screws

An electrochemical 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 a clamp mechanism operative to compressively clamp the stack. A plurality of screws threaded through threaded bores in the upper end plate at spaced locations in the upper end plate and bearing at their lower ends on an upper face of a distributor plate are selectively tightened to provide a substantially uniform torque in each screw whereby to assure uniform compressive loading across the area of the distributor plate and thereby across the area of the fuel cell assembly.

대표청구항 ▼

1. 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

1. 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.