Patent ID: 8216729

Claim:
A fuel cell system comprising: a determination device configured to consume a fuel gas present at a gas leak detection portion of a fuel gas supply system at an anode of a fuel cell, and to perform a gas leak determination on the basis of a pressure variation state of the fuel gas present at the gas leak detection portion; a discharge device configured to reduce a pressure at the gas leak detection portion by purging fuel gas present at an anode off-gas flow passage to the outside of the fuel gas supply system before performing the gas leak determination; and a purge control device for controlling the discharge device, wherein the purge control device is programmed to control the discharge device so as to perform purging when a differential pressure between a detection pressure at the gas leak detection portion and a target pressure is greater than a predetermined value, and wherein the determination device is programmed to perform a gas leak determination when the detected pressure at the gas leak detection portion is equal to or smaller than the target pressure.