Thermal management system of power battery pack and electric automobile with system

Abstract

The invention discloses a thermal management system of a power battery pack and an electric automobile with the system. The thermal management system comprises the power battery pack, a heat exchangecirculating pipeline, an air conditioning system of the electric automobile and a first PTC heater, wherein the power battery pack is provided with a main water inlet and a main water outlet; the twoends of the heat exchange circulating pipeline are connected with the main water inlet and the main water outlet respectively; the air conditioning system of the electric automobile comprises a refrigerating system and a warm air system, the refrigerating system comprises a compressor, a condenser and an evaporator, the evaporator comprises a first heat exchange channel and a second heat exchangechannel which are in heat exchange with each other, the first heat exchange channel is connected between the compressor and the condenser in series, and the second heat exchange channel is part of theheat exchange circulating pipeline; the warm air system comprises a warm air pipeline, and the warm air pipeline is selectively communicated with the heat exchange circulating channel; the first PTCheater is used for selectively heating heat exchange liquid in the heat exchange circulating channel. According to the thermal management system, heating and cooling of the power battery pack are uniform, the structure is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of power battery thermal management, in particular to a thermal management system for a power battery pack and an electric vehicle having the thermal management system. Background technique [0002] In the related art, the thermal management system of the power battery pack heats or cools the power battery pack by blowing cold or warm air from the air conditioning system of the vehicle into the air duct inside the power battery pack to exchange heat with the power battery pack. This kind of thermal management system, the heat of the power battery pack is uneven, the temperature difference between the multiple power battery modules in the power battery pack is large, and the airflow is used for heating or cooling, it is necessary to add a lot of fans and motors that drive the fans, increasing the electric power The power consumption of automobiles, and the high requirements for air duct design, the large occu...

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Problems solved by technology

[0002] In related technologies, the thermal management system of the power battery pack heats or cools the power battery pack by blowing the cold or warm air from the vehicle's air conditioning system into the air duct inside the power battery pack to exchange heat with the power battery pack. With this type of thermal management system, the heat of the power battery pack is not uniform, and the temperature difference between the multiple power battery modules in the power battery pack is large, and the airflow is used for heating or cooling, so it is necessary to add a lot of fans and motors that drive the fans, which increases the power consumption of the power battery pack. The power consumption of the car, and the air duct design requirements are high, the occupation volume is large, the cost is high, and there is a need for improvement

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