With the rapid development of new energy power battery technology, the country has high hopes for high-density, high-power, fast charging and discharging new energy vehicles. However, in this process, the original air-cooled cooling technology has been unable to meet the heat dissipation needs of new batteries, and the liquid cooling system is gradually becoming the inevitable trend of new energy vehicle thermal management because of its excellent performance advantages.

　　The liquid cooling system has shown broad application prospects in the field of new energy vehicles with its characteristics of fast cooling speed, uniform temperature distribution, precise and simple fluid temperature and flow control. Especially in extreme weather conditions, the effectiveness of the liquid cooling system is particularly outstanding. In the low temperature environment, the liquid cooling system can reach the low temperature starting standard of -40℃, ensuring that the preheating and thermal protection function of the battery pack before starting can be realized. When the battery temperature exceeds 30℃ after the car is driven, the liquid cooling system can quickly control the battery temperature within the ideal range of 10℃-30℃ to ensure the efficient and safe operation of the battery.

　　It is worth mentioning that with the change of the temperature of the car coolant, in order to ensure the stability of the flow of the battery coolant, the pressure of the liquid cooling system also needs to be adjusted accordingly. In this process, precise flow and pressure control is the key to ensuring a stable battery temperature.

　　In hot weather, the temperature of the coolant and battery pack may soar to more than 50 ° C. At this time, the charge and discharge performance of the battery pack will be severely tested. Through the precise regulation of the liquid cooling system, the cooling capacity of the vehicle refrigeration system (including the air conditioning, battery pack, electric drive, engine liquid cooling system, etc.) can be reasonably distributed to ensure the rapid balance of the vehicle thermal management system, so that the vehicle performance is maintained within a reasonable range.

　　In order to realize the precise control and efficient operation of the liquid cooling system, the liquid cooling thermal test platform plays an indispensable role. The platform can provide accurate data of the operation of the battery pack liquid cooling system, and provide strong support for new energy vehicle manufacturers when designing vehicle liquid cooling systems.

　　With the continuous expansion of the new energy vehicle market and the increasing requirements of consumers for vehicle performance, the application of liquid cooling system in the thermal management of new energy vehicles will be more and more extensive. This will not only help to improve the safety and stability of new energy vehicles, but also further promote the high-quality development of the new energy vehicle industry.