Integrated thermal management system of pure electric vehicle and pure electric vehicle

Abstract

The invention provides an integrated thermal management system of a pure electric vehicle and the vehicle. The system comprises a controller, a two-position four-way control valve, a passenger compartment thermal management loop, a battery thermal management loop, an electric drive system thermal management loop and a heat dissipation loop, wherein the electric drive system thermal management loop and the heat dissipation loop are communicated. A three-way control valve group connected with the controller is arranged in the passenger compartment thermal management loop so as to change the flowing direction of a refrigerating medium in the passenger compartment thermal management loop; a refrigerating medium channel of the battery thermal management loop is communicated with the passenger compartment thermal management loop through a group of three-way proportional control valves, and a cooling liquid channel of the battery thermal management loop is communicated with the electric driving system thermal management loop through the two-position four-way electromagnetic valve; the controller achieves cooling or heating management of a passenger compartment, cooling or heating management of a battery pack and cooling of an electric drive system by controlling the three-way control valve set, the two-position four-way control valve and the first three-way proportional valve set.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and relates to an integrated heat management system of a pure electric vehicle and the pure electric vehicle. Background technique [0002] The development of electric vehicles puts forward higher requirements for performance such as safety, cruising range and energy saving. Integrating the battery thermal management system with high-efficiency HVAC systems and applying vehicle thermal management technology can effectively improve the above performance. At present, there are three main ways to improve energy utilization efficiency by applying vehicle thermal management systems, namely reducing heat load, improving heat transfer efficiency and reusing available waste heat. Utilizing on-board energy to realize energy collaborative management among battery thermal management system, air-conditioning thermal management system, electric drive thermal management system and energy storage sys...

AI Technical Summary

Problems solved by technology

[0005] The current problem with heat pump air conditioners is that in the heating mode, the external heat exchanger is used as an evaporator, and its surface temperature may be lower than 0°C, which will cause frost or ice on the surface of the heat exchanger, thus making the heat exchanger The performance of the heater has dropped sharply leading to a sharp drop in the efficiency of the heat pump system

The study also found that unevaporated water on the surface of the exterior heat exchanger is prone to secondary freezing, which in turn reduces system performance

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