Fuel cell thermal management system

Abstract

The invention relates to a fuel cell thermal management system, which comprises a fuel cell stack thermal management system, a fuel cell stack air inlet related part cooling system, a fuel cell stack system ion concentration reducing system, a passenger compartment thermal management system and an electrically driven thermal management system. Loop switching of large / small circulation heat dissipation of the fuel cell stack system is achieved through the variable flow four-way valve assembly, and function switching of recovering waste heat of the fuel cell stack to reduce ion concentration of a passenger compartment / PTC independent heating passenger compartment / fuel cell stack system is achieved through the three-way valve assembly. According to the invention, the functions of heat dissipation of the fuel cell stack system, cold start preheating of the ultra-low-temperature fuel cell stack system, reduction of ion concentration of the fuel cell stack system, cooling of parts of a fuel cell stack air inlet system, refrigeration and heating of a passenger compartment, cooling of an electric driving system and defrosting and demisting in winter can be realized; and meanwhile, all function control is integrated on one controller for control, so that the control efficiency and the system reliability are improved.

Description

technical field [0001] The invention relates to a fuel cell thermal management control technology, and belongs to the technical field of fuel cell thermal management. Background technique [0002] With the introduction of the national double-point policy, carbon emission regulations and other policies, the emission requirements for traditional fuel vehicles are getting higher and higher, which also promotes the development of the automobile industry in the direction of new energy vehicles. [0003] New energy vehicles such as pure electric vehicles, hybrid vehicles, and fuel cell vehicles have become the research directions of major OEMs. However, fuel cell vehicles have green emissions, no pollution and high comprehensive efficiency. my country has a good foundation for developing hydrogen energy, a wide range of sources, and a variety of hydrogen production methods. The development of hydrogen energy can optimize the energy structure and is conducive to national energy sec...

AI Technical Summary

Problems solved by technology

[0005] However, there are several major problems in the thermal management system of fuel cell vehicles: ①The thermal efficiency of the fuel cell stack system is only about 50%, and the other 50% almost needs to be dissipated through the cooling system. ±5°C, and the temperature difference between inlet and outlet water is required to be less than 10°C, which is very demanding for the cooling system of the fuel cell stack; Mileage anxiety; ③The fuel cell stack system requires the system to have a low ion concentration, and there is a deionizer in the system circuit to reduce the ion concentration, but the cost of the deionizer is high and the service life is short

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