Electric Vehicle Thermal Management System

Abstract

The invention discloses a heat management system for an electric vehicle, which belongs to the field of electric vehicles. The electric vehicle thermal management system includes an electric drive cooling circuit, an air-conditioning circuit and a battery thermal management circuit, and the heat exchangers are respectively connected to the main branch of the battery thermal management circuit and the heat exchange branch in the air-conditioning circuit, so that the air-conditioning circuit and the The battery thermal management circuit can realize heat exchange, and can distribute the heat in the system no matter when the vehicle is running or charging, and realize the unified thermal management of the electric drive device, air conditioner and battery device. At the same time, the system reduces The water valve, tee and other components are eliminated, the structure is simple, and complex control logic and diagnosis are avoided, making later maintenance and management more convenient.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a heat management system for electric vehicles. Background technique [0002] In order to avoid damage caused by overheating of components caused by the accumulation of heat energy in the electric vehicle, and to provide a comfortable temperature in the cabin, it is necessary to dissipate heat from the operating components and transfer the heat energy of the vehicle air conditioner. Therefore, how to manage the heat energy distribution of electric vehicles is the current vehicle research. one of the directions. [0003] The electric vehicle thermal management system in the prior art includes a power cooling unit, a heating and cooling air-conditioning unit, a heat exchange unit and a control unit. The heat exchange path is controlled and adjusted by the control unit to adjust the flow rate of the coolant in the power cooling unit, so that the heat dissipation capacity of the pow...

AI Technical Summary

Problems solved by technology

[0005] The electric vehicle thermal management system in the prior art is mainly applicable to the heat distribution when the vehicle is running, and does not include the heat distribution during charging; due to the strict requirements on the battery operating temperature and the temperature in the vehicle interior, the thermal management design of the vehicle is relatively difficult. Complex; and when the vehicle is running, the existing system control strategy is complex and has low reliability

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