Patent ID: 7297428
Filing Date: 2007-11-20
Classification: H01M,Y02E,Y10T

Abstract:
1. A fuel cell stack assembly, comprising: a plurality of fuel cell assemblies, each of the fuel cell assemblies comprising: a plurality of registration apertures defined in each of the MEA, the first flow field plate, and the second flow field plate, the respective registration apertures situated within non-active areas of the MEA when the first and second flow field plates and the MEA are axially aligned within the stack assembly, the registration apertures having an inner surface; and a plurality of registration posts configured for reception within the plurality of registration apertures, each of the registration posts having an outer surface differing in shape from a shape of the inner surface of the registration apertures, the inner surface of the registration apertures contacting the outer surface of the registration posts at a plurality of discrete press-fit locations, wherein the registration posts comprise a hollow outer member and a solid core member, the hollow outer member configured to receive the solid core member.