Vehicle fuel cell cooling system

摘要

A system includes a radiator side flow path for supplying a coolant which has cooled a fuel cell stack to a radiator, a bypass flow path for allowing the coolant which has cooled the fuel cell stack to bypass the radiator, a thermostat valve for increasing a flow rate of the coolant flowing through the radiator side flow path in a case where the temperature of the coolant is high as compared to a case where the temperature of the coolant is low, and an electric heater for warming up the coolant. The electric heater is controlled based on an outside atmospheric pressure and on the temperature of the coolant such that the temperature of the coolant flowing into the fuel cell stack is raised in a case where the outside atmospheric pressure is high as compared to a case where the outside atmospheric pressure is low.

主权项

1. 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 first 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 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.