Whole vehicle thermal management system of pure electric vehicle and management method

Abstract

The invention discloses a whole vehicle thermal management system of a pure electric vehicle and a management method. A heat pump type air conditioner system, a battery pack thermal management systemand an electronic control cooling system are arranged on the pure electric vehicle. The system comprises a heat pump type air conditioner refrigerant liquid circulating loop, a coolant liquid circulating loop of the battery pack thermal management system and the electronic control cooling system, and an ECU control center. The two liquid circulating loops are coupled on a first evaporator and a second evaporator, two liquid inlet and outlet internal pipelines of the first evaporator and the second evaporator are independent, and liquid flow directions are designed in a convection mode. Heat among the three sub-systems can be utilized under the condition of guaranteeing driving and riding comfort, an external cold source and sub-system heat sources are fully utilized, and the energy consumption of the whole vehicle thermal management system is reduced.

Description

technical field [0001] The invention belongs to the field of thermal management of a pure electric vehicle, and in particular relates to a thermal management system and a management method of a pure electric vehicle, which are suitable for the thermal management of a pure electric vehicle during operation. Background technique [0002] The thermal management system of a pure electric vehicle consists of three major thermal management systems: the air conditioning system, the battery thermal management system and the electronically controlled cooling system. At present, many technologies on pure electric vehicles are not yet mature, and the three major thermal management systems in pure electric vehicle models are often isolated. Pure electric vehicles only use battery packs as energy sources. During independent operation, many potential low-grade energy in the three major thermal management systems are wasted, thereby wasting a large amount of battery power. [0003] As the...

AI Technical Summary

Problems solved by technology

[0004] At present, the more common battery pack cooling method is to blow hot or cold air into the battery pack to heat or cool the battery by adjusting the fan speed and the size of the damper; The cooling effect of the cells in different areas of the battery pack is different, and the consistency of the cells is poor

In addition, the layout of fans and air ducts takes up a lot of space, which increases the layout pressure of the whole vehicle

[0005] The ambient temperature range of the electronically controlled cooling system is relatively large, but too high a temperature will shorten the service life of the motor rotor, so it needs to be forced to dissipate heat when operating in a high temperature environment; the performance of the air conditioning system directly affects the comfort of the drivers and passengers. And pure electric vehicle air conditioning operation needs to consume a lot of battery power

[0006] At present, most of the cockpit and battery pack heating systems are PTC electric heating, which has low power conversion efficiency and serious waste of power

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