Fuel cell stack electrically insulated fluid connector

摘要

An electrically insulated joint is provided between two fluid conduits, one of which is connected to a fuel cell stack, and the other of which is connected to a source of the fluid being circulated through the stack. The two conduits are both preferably formed from stainless steel, one of the conduits being larger than the other. An intermediate dielectric insulating sleeve is fitted onto the outside of the smaller conduit and extends beyond a free end thereof. The free end of the smaller conduit and a portion of the dielectric sleeve are expanded to the size of the larger conduit's bore and telescoped into the larger conduit's bore. The free end of the larger conduit is then shrunk down onto the outside surface of the unexpanded part of the dielectric sleeve and the smaller conduit. The resultant point has terminal cylindrical portions and an intermediate tapered portion.