Patent ID: 6528196
Filing Date: 2003-03-04
Classification: F28F,H01M,Y02E

Abstract:
A fuel cell stack comprising:a plurality of fuel cell units each composed of an electrolyte interposed between an anode electrode and a cathode electrode, said plurality of fuel cell units being stacked with separators intervening therebetween, a plurality of flow passage grooves provided in a surface of said separator, for allowing a fluid including at least any one of a fuel gas to be supplied to said anode electrode and an oxygen-containing gas to be supplied to said cathode electrode to flow therethrough, wherein said flow passage grooves have a bent section in said surface of said separator, and communication passages are provided at said bent section are discrete and extend non-linearly, which allow said fluid to flow between mutual adjoining flow passage grooves, and wherein said flow passage grooves are disposed independently from each other at said bent section, thereby enabling gas flow into and past said communication passages.