At present, the automobile industry is entering the biggest change in more than a hundred years, which can be called the "automobile revolution." New energy vehicles will be the prelude to a new round of automotive revolution, and the green, connected, and intelligent trends of vehicles will fully release the economic potential of future automobiles. Wang Chuanfu, chairman of BYD Auto, believes that "China's new energy vehicles have entered the'fast lane' and are ushering in a larger-scale market'burst period'." Industry experts believe that with the development of new energy vehicle technology, energy conservation and emission reduction policies The guidance of China and the concept of green consumption are gradually gaining popularity, and China’s new energy automobile industry will continue to release new green kinetic energy for China’s economic development. China will be the world's largest new energy vehicle market, and it has huge development potential.

Recently, the "New Energy Automobile Industry Development Plan (2021-2035)" released by the state stated that by 2025, the sales of new energy vehicles and new vehicles will reach about 20% of the total sales of new vehicles. By 2035, pure electric vehicles will become The mainstream of newly sold vehicles. As policy support continues to increase, the domestic new energy automobile industry is gaining momentum, and monthly production and sales in the second half of this year are both higher than the same period last year. According to data from the China Association of Automobile Manufacturers: my country's new energy vehicle market in October sales increased by 104.5% year-on-year, marking the fourth monthly sales record in 2020. There are more and more people buying new energy vehicles, and the market is calling for a perfect fluid solution for the new energy vehicle OEMs' loading and after-sales market maintenance needs.

　　 It can be seen in major automobile forums that many people are paying attention to the difference between the maintenance of electric vehicles and traditional fuel vehicles. The heat dissipation of the power system is a hot topic.

　　Electric vehicles also need high-quality coolant

　　Pure electric vehicles are powered by an on-board power supply, which converts electrical energy into mechanical energy to drive wheels through a motor.

The vehicle power supply and motor will produce certain losses during the working process. These losses are radiated outward in the form of heat. An effective cooling medium and cooling method are required to take away the heat to ensure that the motor is in a stable cooling and heating cycle balance. Operate safely and reliably.

At present, due to the different key technologies adopted by various automakers, the design of electric vehicle power systems and related cooling systems has not yet formed a unified and mature industry technology evaluation system. We can learn about electric vehicle cooling systems through the relevant designs of some mainstream brands. The general structural characteristics of the.

Schematic diagram of a certain brand of electric vehicle driving motor cooling system structure

　　As can be seen from the above figure, the drive system of the brand's electric vehicles adopts a combination of air cooling and liquid cooling to ensure the safe operation of the entire system. The liquid cooling system relies on the cooling water pump to drive the coolant to circulate in the cooling pipeline. Through the process of heat exchange in the radiator, the coolant takes away the heat generated by the motor and the controller.

　　 In the entire cooling system, the coolant plays a very important role. Like fuel vehicles, the power system of electric vehicles also requires the coolant to have triple protection against corrosion, overheating, and frost.