Patent ID: 8771886

Claim:
A fuel cell system, comprising: a fuel gas supply line that supplies fuel gas from a fuel gas supply source to the fuel cell; pressure-regulating means provided on the fuel gas supply line and configured to regulate a pressure of the fuel gas supplied from the fuel gas supply source; a circulation route configured to return the fuel gas discharged from the fuel cell to the fuel gas supply line; a fuel gas pump configured to circulate the fuel gas in the circulation route; and a control unit configured to control the system, wherein the circulation route is connected to the fuel gas supply line such that the fuel gas is returned to the fuel gas supply line upstream of the pressure-regulating means, the control unit is configured to output a control signal to the fuel gas pump to control the fuel gas that is circulated in the circulation route, and the pressure-regulating means is configured such that a pressure of the fuel gas downstream of the pressure-regulating means eases pressure fluctuation of the fuel gas upstream of the pressure-regulating means.