Thermal management control method and system and fuel cell vehicle

Abstract

The invention relates to the field of fuel cell vehicles, in particular to a thermal management control method and system and a fuel cell vehicle. The method comprises the steps: adjusting the heat exchange between a cooling circulation loop and a warm air circulation loop through a heat exchange loop, wherein heat exchange is conducted between the heat exchange loop and the cooling circulation loop through a heat exchanger; controlling the heat exchange loop to be communicated with the warm air circulation loop through a three-way valve; controlling the opening degree of the three-way valve according to the temperature parameter relation of the cooling circulation loop and the warm air circulation loop, and adjusting the liquid flow in the pipeline of the heat exchange loop and the warm air circulation loop. According to the embodiment of the invention, the heat dissipated when the fuel cell works is transferred to the warm air circulation loop, and the opening degree of the three-way valve in the warm air circulation loop is adjusted according to the temperature parameters of different loops, so that the temperature in a whole vehicle cabin and the temperature of the fuel cell can be accurately controlled under the condition of high-power operation of the fuel cell; moreover, the efficient utilization of waste heat can be ensured under the conditions that the fuel cell runs at low power and the available waste heat quantity is smaller.

Description

Technical field [0001] The present invention relates to the field of fuel cell vehicles, and more particularly to a thermal management control method, a system, and a fuel cell vehicle. Background technique [0002] In the field of new energy vehicles, the fuel cell system has the advantages of non-polluting, short hydrogenation time, long renewal mumens, and strong environmental adaptability, and has broad application scenarios. However, as the vehicle's power demand is getting bigger, high-power fuel cell engine is gradually applied to new energy vehicles; the fuel cell engine system is high power output, and fuel cell vehicles face a big challenge in thermal management and battery life. Fuel battery vehicles have no traditional engine heat, requires simple use of PTC heaters, consumes a lot of electricity in winter, such as a 12-meter bus for the PTC power consumption of 10 hours to 15 ~ 20KWh; while fuel cell About 50% of the heat is scattered by a cooling fan, such as the he...

AI Technical Summary

Problems solved by technology

Among them, the temperature rise of the coolant in the vehicle heating system depends entirely on the PTC heater, which consumes a lot of energy; while the high-power fuel cell has high power output, the working temperature can be as high as 70-80°C, and the temperature difference between the engine inlet and outlet must be maintained at 10°C Within the limit, this part of the heat is dissipated through the radiator and is not used in the vehicle heating system, resulting in waste of heat and low energy utilization; in addition, when the cooling system of the hydrogen fuel cell engine is working, the cooling fan has a large workload, consumes a lot of energy, and makes noise larger

At present, although attempts have been made to develop a technical solution for heating the whole vehicle by using the waste heat of fuel cells, based on the current supply status of domestic fuel cell engines and vehicle manufacturers, there is no practical and compatible thermal management control method and system

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