Patent ID: 6936369

Claim:
A fuel cell stack comprising a plurality of fuel cell units and a plurality of separators interposed between each fuel cell unit, each fuel cell unit composed of a solid polymer ion exchange membrane interposed between an anode electrode and a cathode electrode, and a pair of separators supporting each of said fuel cell units, said fuel cell units and said separators being stacked in a horizontal direction, said fuel cell stack including: an inlet side communication hole which is provided to penetrate through said separators, for supplying a reaction gas containing a fuel gas or an oxygen-containing gas; an outlet side communication hole for discharging a reacted gas corresponding to said reaction gas; an additional plate disposed adjacent to an end of the fuel cell units and separators in a stacking direction; and a discharge hole provided in the additional plate and in communication with a deep portion of the outlet side communication hole opposite a discharge port, for supplying reaction gas to the outlet side communication hole.