Patent ID: 7635532
Filing Date: 2009-12-22
Classification: H01M,Y02E

Abstract:
1. A polymer electrolyte fuel cell comprising: a cell stack in which a plurality of unit cells each comprising a polymer electrolyte membrane and an anode and a cathode sandwiching said electrolyte membrane are stacked with a plurality of conductive separator plates located on either side of each unit cell; a pair of current collector plates and a pair of end plates, both of which sandwich said cell stack; wherein the plurality of conductive separator plates includes at least one conductive separator plate located between at least one of the end plates and the unit cell located closest to said one of the end plates; supply and discharge manifolds for a fuel gas and an oxidant gas, through which the fuel gas and the oxidant gas are supplied and discharged to and from the anode and the cathode of the cell stack, respectively wherein said current collector plates have a mist discharge groove in fluid communication with said supply and discharge manifolds for the fuel gas or oxidant gas in their surfaces contacting the conductive separator plates, and wherein the conductive separator plate between at least one of the end plates and the unit cell located closest to said one of the end plates has no coolant flow channel therein.