Battery thermal management system for electric automobile heat pump

Abstract

The invention relates to a battery thermal management system for an electric automobile heat pump. The system comprises an air conditioning management system and a battery management system connectedwith the air conditioning management system; the air conditioning system comprises an air conditioning box, and an external heat exchanger, a gas-liquid separator and a compressor are arranged outsidethe air conditioning box; the battery management system comprises a battery cooler, a first branch and a second branch, the first branch and the second branch are connected with the battery cooler, the first branch comprises a first water pump, a second high-voltage PTC and a battery pack, and the second branch comprises a second water pump, an electric controller, a motor and a low-temperature water tank. A three-way valve is communicated between one side of the external heat exchanger and an internal heat exchanger, and the other side is respectively communicated with liquid inlets of ab evaporator and a battery cooler; the battery cooler can be used for absorbing waste heat emitted by the motor and the electric controller and waste heat emitted by the battery when the air conditioningsystem conducts heating, heat in air is absorbed through the low-temperature RAD, and therefore the heating performance of the air conditioning system is improved.

Description

technical field [0001] The invention belongs to the field of electric vehicles, in particular to the structural field of electric vehicle heat pumps and battery thermal management systems. Background technique [0002] The electric vehicle industry is developing rapidly, but due to the characteristics of batteries and the diversity of electric vehicle application environments, it is currently difficult for electric vehicles to be widely used in severe cold areas and hot areas, or to run over long distances; if the humidity outside the vehicle is high, it will cause the vehicle to The external heat exchanger is frosted or even frozen, which seriously hinders the heat exchange of the external heat exchanger, causing the heating performance of the heat pump air conditioner to rapidly and greatly attenuate, significantly affecting the heating effect, and even causing the air conditioner compressor to fail; The traditional electric vehicle air conditioning system generally adopts...

AI Technical Summary

Problems solved by technology

[0002] The electric vehicle industry is developing rapidly, but due to the characteristics of batteries and the diversity of electric vehicle application environments, it is currently difficult for electric vehicles to be widely used in severe cold areas and hot areas, or to run over long distances; if the humidity outside the vehicle is high, it will cause the vehicle to The external heat exchanger is frosted or even frozen, which seriously hinders the heat exchange of the external heat exchanger, causing the heating performance of the heat pump air conditioner to rapidly and greatly attenuate, significantly affecting the heating effect, and even causing the air conditioner compressor to fail; The traditional electric vehicle air conditioning system generally adopts air conditioning refrigeration + auxiliary PTC method to realize the cooling and heating of the passenger compartment. This system structure heating method has low energy efficiency and has a great impact on the cruising range of the vehicle.

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