Fuel cell vehicle cooling system and control method thereof

Abstract

The invention relates to a fuel cell vehicle cooling system. A first temperature sensor and a second temperature sensor are respectively arranged at an inlet and an outlet of a fuel cell stack; signaloutput ends of the first temperature sensor and the second temperature sensor are respectively connected with the fuel cell controller; the input end of the water pump is connected with a fuel cell stack outlet; the output end of the water pump is connected with the input end of the first temperature control valve; a first output end of the first temperature control valve is connected with a cooling liquid inlet of the fuel cell stack; the second output end of the first temperature control valve is connected with the input end of a second temperature control valve, the first output end of thesecond temperature control valve is connected with a cooling liquid inlet of the fuel cell stack through a heat dissipation device, and the second output end of the second temperature control valve is connected with a cooling liquid inlet of the fuel cell stack through a heater. According to the invention, the temperature of the cooling liquid flowing into the galvanic pile can be maintained within a set range in different external environments, so that the chemical reaction in the galvanic pile is ensured to be normally carried out, and power energy is provided for the whole vehicle.

Description

technical field [0001] The invention relates to the technical field of hydrogen fuel cells, in particular to a fuel cell vehicle cooling system and a control method thereof. Background technique [0002] As a big automobile country, my country has a huge automobile market, which brings economic benefits, but also brings huge energy consumption and environmental pollution. With the increasingly fierce competition in the automotive field, various enterprises and universities have begun to engage in research on hydrogen fuel cell vehicles. At present, the key technologies of fuel cell vehicles have been basically broken through, but further improvement and promotion of fuel cell industrialization technology is needed to make the industrialization technology mature. As a part of the entire fuel-fired power system, the cooling system keeps the stack at a suitable reaction temperature and ensures the normal progress of the reaction. The existing fuel cell cooling system usually ...

AI Technical Summary

Problems solved by technology

In the current cooling system, when the temperature is between A and B, the coolant still flows into the small circuit. Because there is an external heater in the small circuit, the flow resistance of the coolant is increased, the flow rate of the coolant is reduced, and the heat dissipation of the stack is not timely. , reduced work efficiency

And when the temperature is between A and B, the external heater still has a high temperature after it is turned off, and the temperature rises when the coolant flows through the external heater, which affects the stack reaction

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