Fuel cell system with liquid cooling device

A fuel cell system comprising:

• a fuel cell stack;
• an air supply system supplying an air flow to the fuel cell stack, comprising a blower for driving the air to the fuel cell stack and an air humidifier for humidifying the air supplied to the fuel cell stack;
• a hydrogen supply system supplying hydrogen to the fuel cell stack, comprising a hydrogen storage in which hydrogen is stored and from which a hydrogen flow is supplied to the fuel cell stack, and a pressure regulating device for regulating the hydrogen flow, a hydrogen recirculator for receiving excessive hydrogen from the fuel cell stack and forcing the hydrogen back into the fuel cell stack in order to induce a hydrogen flow inside the fuel cell stack;
• and
• a coolant circulation system supplying a low temperature coolant to the fuel cell stack for absorbing heat from the fuel cell stack and becoming high temperature coolant, comprising a coolant reservoir in which the coolant is stored, a pump driving the circulation of the coolant, a radiator for removing heat from the high temperature coolant and converting the high temperature coolant into the low temperature coolant, the coolant reservoir comprising a ventilation device for removing air bubbles from the coolant, the coolant circulation system further comprising a heat exchanger for transferring heat from the high temperature coolant to the hydrogen storage, the radiator comprising a fan for generating an air flow therethrough to removing heat from the coolant;
• and
• a control circuit electrically controlling the flow and pressure regulating device, the blower, the pump and the fan.