Patent ID: 7687170
Filing Date: 2010-03-30
Classification: H01M,Y02E

Abstract:
1. A fuel cell system comprising: a fuel cell for generating electricity by chemical reaction between fuel gas and oxidant gas; a supply channel for flowing said fuel gas supplied from fuel supply device to said fuel cell; a circulation channel which is connected to said supply channel and which is for circulating exhaust gas, discharged from a fuel electrode of said fuel cell, to said fuel cell; and an exhaust gas recovery channel which divides from said circulation channel and is connected to said circulation channel or said supply channel, wherein said exhaust gas recovery channel comprises a first control valve controlled by a control device, a first exhaust gas storage unit connected to a downstream side of said first control valve, and a pressure adjusting unit for setting said first exhaust gas storage unit to a negative pressure, wherein said control device determines a flooding state so as to control opening and closing of said first control valve.