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

Abstract

The invention relates to an integrated thermal management system of an electric vehicle based on a mixed phase change material, and belongs to the technical field of thermal management systems of automobiles. The integrated thermal management system includes a first solenoid valve, a pump, a gas-liquid separator, a compressor, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, an air conditioning pipe group, a fifth solenoid valve, and a first throttle valve , a first condenser, a second condenser, a sixth solenoid valve, a seventh solenoid valve, a second throttle valve and a battery cooling mechanism. The first solenoid valve and the second solenoid valve are two-position two-way electromagnetic reversing valves; the third solenoid valve is a two-position four-way electromagnetic reversing valve; the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the seventh solenoid valve The solenoid valve is a two-position six-way electromagnetic reversing valve; the pump is a hydraulic pump; the working fluid of the system is a mixed phase change material; according to the working position of the third solenoid valve, the system is divided into two modes, single working fluid working mode and mixed working mode. The quality working mode is suitable for different working temperature ranges of batteries and air conditioners.

Description

technical field [0001] The invention belongs to the technical field of thermal management systems of automobiles, and in particular relates to an air-conditioning battery integrated thermal management system based on mixed phase change materials for pure electric vehicles and hybrid electric 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,...

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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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