Thermal management system for new energy vehicle power battery

Abstract

The invention discloses a thermal management system for a new energy vehicle power battery. The thermal management system comprises a refrigerant circulating loop and a cooling liquid circulating loop, wherein the refrigerant circulating loop comprises a compressor, a condenser, a throttle valve, an evaporator and a gas-liquid separator which are sequentially connected through a pipeline; the gas-liquid separator is connected back to the compressor; the cooling liquid circulating loop comprises a circulating pipe; the circulating pipe is sequentially connected with a water tank, a circulating pipe heat exchange part, a water pump, a water inlet / outlet and a heater; the circulating pipe heat exchange part is wound on the evaporator; the heater is connected back to the water tank; and the circulating pipe is provided with a first connecting pipe, a first three-way valve, a second connecting pipe and a second three-way valve. The thermal management system has the advantages of a good cooling effect and high heating efficiency on the new energy vehicle power battery; the new energy vehicle power battery can be cooled; and the new energy vehicle power battery can also be heated.

Description

Technical field [0001] The invention belongs to the technical field of temperature control devices, and specifically relates to a thermal management system for a power battery of a new energy vehicle. Background technique [0002] The new energy vehicle power battery is an essential part of the car. It has the characteristics of clean, high efficiency and environmental protection, but the new energy vehicle power battery generates heat during the charging and discharging operation cycle. Overheating of the power battery unit of the new energy vehicle will affect the normal operation of the power battery of the new energy vehicle. Therefore, the cooling system is usually used in combination with the power battery of new energy vehicles. Most of the cooling methods used in the prior art are air-cooled. The power battery of new energy vehicles is blown with cold wind to cool the power battery of new energy vehicles. However, this cooling method has a significant problem, that is, c...

AI Technical Summary

Problems solved by technology

The cooling method used in the existing technology is mostly air cooling, and the power battery of the new energy vehicle is cooled by cold wind blowing on the power battery of the new energy vehicle. However, this cooling method has a significant problem, that is, the cold wind can only blow to the new energy vehicle. One side of the power battery cannot be blown to the other sides, resulting in poor cooling effect

In addition, in the northern part of China, the weather is cold in winter, and the low temperature makes the power battery of the new energy vehicle unable to work, so that the vehicle cannot be started normally.

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