Integrated thermal management system for electric vehicles based on phase change materials

Abstract

The invention relates to an integrated thermal management system of an electric vehicle based on a phase change material, and belongs to the technical field of thermal management systems of vehicles. The system includes a first solenoid valve, a second solenoid valve, a gas-liquid separator, a compressor, a third solenoid valve, a fourth solenoid valve, a condenser, an air conditioning pipeline, a fifth reversing valve, a throttle valve, an evaporation device, sixth reversing valve, fan, motor liquid cooling pipeline, battery liquid cooling pipeline; the first solenoid valve, the third solenoid valve and the fourth solenoid valve are all two-position six-way electromagnetic reversing valves, and the second The solenoid valve, the fifth solenoid valve and the sixth solenoid valve are all two-position three-way solenoid reversing valves; the working fluid in the system is set to be perfluorohexanone with a boiling point of 53°C. The invention has four working conditions. While satisfying the basic performance of battery heating and cooling, the cooling and heating of the auxiliary air conditioner fully utilizes the residual heat of the motor; the invention is suitable for both pure electric vehicles and hybrid electric vehicles.

Description

technical field [0001] The invention belongs to the technical field of thermal management systems for automobiles, and in particular relates to an integrated thermal management system for pure electric vehicles or hybrid vehicles. Background technique [0002] In a low temperature environment, too low temperature will affect the battery discharge performance, which may lead to insufficient power output of the electric vehicle; in a normal temperature environment, the battery pack will frequently perform charging and discharging activities during the driving of the electric vehicle, and the battery will continue to generate heat during this process , leading to a rise in battery temperature and affecting the working efficiency of the battery; in a high-temperature environment, if the battery cannot dissipate heat in a timely and effective manner, the battery may be in danger of thermal runaway. Therefore, in order to improve the working efficiency of the battery and ensure th...

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Problems solved by technology

However, most of these research results are thermal management systems designed with solid-liquid phase change materials, and have not comprehensively considered the waste heat of the motor and liquid-gas phase change materials to optimize the design of the electric vehicle motor battery thermal management system.

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