Electric vehicle thermal management system

Abstract

The invention discloses an electric vehicle thermal management system, and belongs to the field of electric vehicles. The electric vehicle thermal management system comprises an electrically-driven cooling circuit, an air conditioning circuit and a battery thermal management circuit. A heat exchanger is connected to a main branch of the battery thermal management circuit and a heat exchanging branch in the air conditioning circuit so that the air conditioning circuit and the battery thermal management circuit can achieve heat exchanging; whether a vehicle is driven or charged, heat in the electric vehicle thermal management system can be distributed, and unified thermal management of an electric driving device, an air conditioner and a battery device is achieved; and meanwhile the electric vehicle thermal management system reduces the components of a water valve, a tee joint and the like, the structure is simple, complex control logic and diagnosis are avoided, and therefore the later maintenance and management are 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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