Patent ID: 7833670
Filing Date: 2010-11-16
Classification: H01M,Y02E

Abstract:
1. A fuel cell system comprising: a fuel cell comprising a cathode and an anode; an oxidant-containing gas supply path along which an oxidant-containing gas is supplied to said cathode; a reformer producing a hydrogen-containing gas from a raw fuel and supplying said hydrogen-containing gas to said anode; a power converter comprising an output terminal connected to an external load, and comprising a function of converting an output of said fuel cell to power according to an application as well as a constant-current operating function; a first switch connected in series to said power converter; a short-circuit resistor; a second switch connected in series to said short-circuit resistor; and a current-value control section configured to control a current value output from said fuel cell, wherein a pair of said power converter and said first switch is connected between said cathode and said anode, a pair of said short-circuit resistor and said second switch is also connected between said cathode and anode, when stopping electricity production by said fuel cell, said current-value control section a first voltage detector outputting a first signal when an input voltage from said power converter falls below an operable lower limit voltage value of said power converter which corresponds to said constant threshold value, and a second voltage detector detecting said output voltage of said fuel cell and outputting the result of detection as a second signal.