Thermal management system and thermal control method of high-power fuel cell commercial vehicle

Abstract

The invention discloses a thermal management system and a thermal control method of a high-power fuel cell commercial vehicle. The thermal management system comprises a fuel cell module, wherein a water outlet of the fuel cell module is connected with a water outlet of an electric control reversing valve through a water outlet temperature sensor; a first outlet of the electric control reversing valve is connected with a heating module, and a second outlet is connected with a heat dissipating device; the heating module and the water outlet connected with the heat dissipating device are both connected with a water inlet of a medium-high pressure electronic water pump; and an outlet of the medium-high pressure electronic water pump is connected with a water inlet of a fuel cell module througha water inlet temperature sensor. According to the thermal management system and the thermal control method, the heat dissipating device is adopted to match the technical route of a large-diameter mechanical fan plus a medium-high voltage speed regulating drive motor and a small-cycle series heating module through large circulation of cooling liquid; under the control of a controller, the fuel cell is always in an optimal working temperature range by using the medium-high voltage speed regulating medium-high voltage electronic water pump, an electric control reversing valve, a power converter, a fuel cell inlet and outlet water temperature sensor and the like; and the heat dissipation capacity of the whole vehicle is greatly improved and the market demand is met.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of fuel cell cooling systems, and relates to a thermal management system and a thermal control method of a high-power fuel cell commercial vehicle. [0003] 【Background technique】 [0004] Fuel cells have the advantages of zero emission and zero pollution. Various OEMs have successively carried out the development of fuel cell commercial vehicles, and put forward higher requirements for the heat dissipation capacity and control accuracy of the cooling system. At present, a modular design scheme in which a single radiator is matched with multiple low-voltage electronic fans is adopted. Due to the small diameter, low static pressure, and small air volume of the low-voltage electronic fan, the radiator is often large, but the heat dissipation power is generally small; the flow rate of the matching low-voltage, medium-high and high-voltage electronic water pump is also low; this affects the cooling power...

AI Technical Summary

Problems solved by technology

Due to the small diameter, low static pressure, and small air volume of the low-voltage electronic fan, the radiator is often large, but the heat dissipation power is generally small; the flow rate of the matching low-voltage, medium-high and high-voltage electronic water pump is also low; this affects the cooling power of the cooling module.

[0005] With the increasing demand for high-power fuel cells in the market, the feasibility of matching multiple cooling modules is getting lower and lower due to the limitation of the vehicle layout. Increasing heat dissipation requirements

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