FUEL CELL SYSTEM, CONTROL APPARATUS, AND CONTROL METHOD

A fuel cell system includes a fuel cell, a circuit, a pump, a pressure regulating valve, and a control apparatus. The fuel cell includes a plurality of membrane electrode assemblies and a separator. The separator has a gas channel and a coolant channel. The circuit is coupled to the coolant channel and allows a coolant to circulate therethrough. The pump delivers the coolant toward the coolant channel. The pressure regulating valve adjusts a pressure of the coolant in the coolant channel. The control apparatus controls a flow rate of the coolant in the coolant channel by controlling a rotational speed of the pump on the basis of a temperature of the fuel cell, and controls the pressure of the coolant in the coolant channel by controlling a position of the pressure regulating valve on the basis of a pressure of gas in the gas channel.