Heat management system for electric vehicle

Abstract

The invention provides a heat management system for an electric vehicle and a vehicle. The heat management system includes a heat pump air conditioning assembly and an auxiliary heating assembly, wherein the heat pump air conditioning assembly includes a compressor (1), a first heat exchanger (11), a first electronic expansion valve (12), a second heat exchanger (13) and a gas-liquid separator (10), the heat pump air conditioning assembly forms a first refrigerant loop, the auxiliary heating module includes a first water pump (23), a fuel heater (24), a shunt (25), the first heat exchanger (11) and a warm air core (26), the auxiliary heating module forms a first coolant fluid loop, and the first refrigerant loop and the first coolant fluid loop are coupled through the first heat exchanger(11) to form a heating loop of a passenger compartment of the vehicle.

Description

technical field [0001] The invention relates to the field of vehicle thermal management, in particular to a thermal management system for electric vehicles. Background technique [0002] The role of the thermal management system of electric vehicles is to provide air-conditioning and cooling or warm air heating for passengers in the passenger compartment, and to control systems such as battery packs and drive motors to work within a reasonable temperature range. [0003] At present, the thermal management system of electric vehicles mainly conducts independent thermal management on the motor cooling system circuit, the battery pack cooling system circuit, and the passenger compartment thermal management system. When the battery pack needs to be heated, the water heating PTC heater is generally used to heat the battery pack alone. The water heating PTC heater will consume battery energy, thereby increasing the energy consumption of thermal management during driving and reduci...

AI Technical Summary

Problems solved by technology

[0005] 1. When the ambient temperature outside the vehicle is low and the humidity is high, the heat exchanger outside the vehicle will be frosted or even frozen when the heat pump is heating, which will seriously affect the heat exchange efficiency of the heat exchanger outside the vehicle, and it is necessary to remove it in time. frost treatment

[0006] 2. When the heat exchanger outside the car is frosted, the traditional heat pump air-conditioning system must first defrost it. When defrosting, it is in the cooling mode and cannot heat the inside of the car. In the cold winter, the heat exchanger outside the car The defrosting time is long, and the heat dissipation in the car through the car body is relatively severe, and the temperature in the car will be greatly reduced, which seriously affects the comfort of the car.

[0007] 3. In the case of ultra-low temperature (-15℃~-30℃), the air source heat pump air conditioning system can hardly perform heating

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