Fuel cell system

A fuel cell system, comprising a fuel cell stack configured to generate power according to a load, a fuel tank configured to store fuel gas, a pressure regulating valve configured to regulate a pressure of the fuel gas supplied from the fuel tank to the fuel cell stack, a purge valve configured to purge the fuel gas discharged from the fuel cell stack, and a controller configured to control the system, wherein:

• the controller includes:
• a pulsating unit configured to cause a fuel gas pressure of the fuel cell stack to pulsate;
• and
• a pressure increasing rate setting unit configured to set a pressure increasing rate of pulsation of the fuel gas pressure, such that the pressure increasing rate of pulsation is higher in a high-load operation of the fuel cell system than the pressure increasing rate of pulsation is in a low-load operation of the fuel cell system,
• wherein the high-load operation of the fuel cell system is a state where the load requested by the fuel cell stack is high and the lower limit of the fuel gas pressure is high, and the low-load operation of the fuel cell system is a state where the load requested by the fuel cell stack is low and the lower limit of the fuel gas pressure is low, and
• wherein the controller is configured to:
• perform at least one of the low-load operation or the high-load operation in response to the requested load.