Vehicle fuel cell cooling system

A vehicle fuel cell cooling system configured to circulate and supply a coolant to a fuel cell installed in a vehicle and to perform temperature control of the fuel cell, the system comprising:

• a temperature sensing means for detecting a temperature of the coolant;
• an outside atmospheric pressure sensing means for detecting an outside atmospheric pressure;
• a radiator configured to discharge heat from the coolant to outside air;
• a first coolant flow path configured to supply the coolant which has cooled the fuel cell to the radiator;
• a second coolant flow path configured to allow the coolant which has cooled the fuel cell to bypass the radiator;
• a thermostat valve configured to switch between the first coolant flow path and the second coolant flow path in accordance with the temperature of the coolant, wherein an operating temperature of the thermostat valve is preset such that the temperature of the coolant to be supplied to the fuel cell becomes a temperature for maintaining a moisture condition of a membrane of the fuel cell within a predetermined range when the outside atmospheric pressure is at a predetermined first pressure;
• a warming means for warming up the coolant;
• and
• controlling means programmed to control the warming means based on the temperature of the coolant and the outside atmospheric pressure, and to raise the temperature of the coolant flowing into the fuel cell in a case where the outside atmospheric pressure is higher than the predetermined first pressure.

A vehicle fuel cell cooling system configured to circulate and supply a coolant to a fuel cell installed in a vehicle and to perform temperature control of the fuel cell, the system comprising:

• a temperature sensor configured to detect a temperature of the coolant;
• an outside atmospheric pressure sensor configured to detect an outside atmospheric pressure;
• a radiator configured to discharge heat from the coolant to outside air;
• a first coolant flow path configured to supply the coolant which has cooled the fuel cell to the radiator;
• a second coolant flow path configured to allow the coolant which has cooled the fuel cell to bypass the radiator;
• a thermostat valve configured to switch between the first coolant flow path and the second coolant flow path in accordance with the temperature of the coolant, wherein an operating temperature of the thermostat valve is preset such that the temperature of the coolant to be supplied to the fuel cell becomes a temperature for maintaining a moisture condition of a membrane of the fuel cell within a predetermined range when the outside atmospheric pressure is at a predetermined second pressure;
• a warming device configured to warm up the coolant;
• and
• a controller programmed to control the warming device based on the temperature of the coolant and the outside atmospheric pressure, and to lower the temperature of the coolant flowing into the fuel cell in a case where the outside atmospheric pressure is lower than the predetermined second pressure.

A vehicle fuel cell cooling system configured to circulate and supply a coolant to a fuel cell installed in a vehicle and to perform temperature control of the fuel cell, the system comprising:

• a temperature sensing means for detecting a temperature of the coolant;
• an outside atmospheric pressure sensing means for detecting an outside atmospheric pressure;
• a radiator configured to discharge heat from the coolant to outside air;
• a first coolant flow path configured to supply the coolant which has cooled the fuel cell to the radiator;
• a second coolant flow path configured to allow the coolant which has cooled the fuel cell to bypass the radiator;
• a thermostat valve configured to switch between the first coolant flow path and the second coolant flow path in accordance with the temperature of the coolant, wherein an operating temperature of the thermostat valve is preset such that the temperature of the coolant to be supplied to the fuel cell becomes a temperature for maintaining a moisture condition of a membrane of the fuel cell within a predetermined range when the outside atmospheric pressure is at a predetermined second pressure;
• a warming means for warming up the coolant;
• and
• controlling means programmed to control the warming means based on the temperature of the coolant and the outside atmospheric pressure, and to lower the temperature of the coolant flowing into the fuel cell in a case where the outside atmospheric pressure is lower than the predetermined second pressure.