Vehicle air-conditioner system with battery heat management function

Abstract

A vehicle air-conditioner system with a battery heat management function comprises a compressor, a condenser, a first expansion valve and an evaporator. The compressor, the condenser, the first expansion valve and the evaporator are connected in the first flowing direction of a refrigerant to form an air-conditioner refrigeration circulation loop. The vehicle air-conditioner system further comprises a plate heat exchanger, a second expansion valve, an air-water heat exchanger, a fan, a water pump, an electric heater and a battery pack built-in heat exchanger. The fan is arranged on the air inlet side of the air-water heat exchanger. The compressor, the condenser, the second expansion valve and the plate heat exchanger are connected in the second flowing direction of the refrigerant to form a battery cooling low-temperature medium circulation loop. The battery pack built-in heat exchanger, the water pump, the plate heat exchanger, the air-water heat exchanger and the electric heater are connected in the water circulation direction to form a battery temperature adjusting medium circulation loop. According to the vehicle air-conditioner system, uniform management of the temperature inside a vehicle and the temperature of a battery is achieved, a battery pack is in the better temperature environment all the time during working, and it is ensured that the good refrigeration effect is achieved inside the vehicle.

Description

technical field [0001] The invention belongs to a vehicle air-conditioning system, in particular to a vehicle heat pump air-conditioning system with a battery thermal management function. Background technique [0002] In the field of automobiles, pure electric vehicles or electric hybrid vehicles do not produce harmful substances or produce less harmful substances than traditional fuel vehicles, so they have better development prospects. For pure electric vehicles or electric hybrid vehicles, since batteries are used as power sources, they are currently mainly equipped with a separate thermal management system for cooling the batteries. At present, the thermal management system for cooling the battery generally adopts the air-water heat exchange method to cool down. The heat exchange efficiency of this cooling method is not high. Cooling needs, but when the ambient temperature is high, such as in a high temperature environment in summer, this heat exchange method cannot ful...

AI Technical Summary

Problems solved by technology

At present, the thermal management system for cooling the battery generally uses air-water heat exchange to cool down. The heat exchange efficiency of this cooling method is not high. Therefore, when the ambient temperature is not too high, it can basically meet the needs of the battery. Cooling needs, but when the ambient temperature is high, such as in the high temperature environment in summer, this heat exchange method cannot fully meet the cooling needs of the battery, which will adversely affect the service life of the battery

In addition, when the external ambient temperature is low, usually lower than 10°C, the charging and discharging of the battery, especially charging, will also have an adverse effect. When the ambient temperature is lower than 0°C, it is difficult to achieve charging. up

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