Compared with traditional fuel vehicles, the main difference of new energy vehicles is that the fuel engine system is replaced by three electrical components (battery, motor, electronic control), and the corresponding engine cooling system becomes the power battery thermal management and motor electronically controlled cooling system. Although some automobile air conditioning systems are retained, they have lost the original energy source engine, so their main components have also undergone major changes. The thermal management system of new energy vehicles consists of three parts: cabin thermal management (heating and cooling), battery system thermal management (heating and cooling), and motor electronically controlled cooling system.

Chiller is a kind of heat exchanger, which combines the functions of evaporator and heat exchanger. It is a key component that couples the liquid cooling circuit of the battery and the air conditioning circuit of the cockpit. One of the incremental components of the management system.

In terms of working principle, the internal main body of Chiller is composed of a stack of plate heat exchange fins, which are divided into a refrigerant circuit (evaporator) and a cooling liquid circuit (heat exchanger). Internal flow. In the main body of the heat exchanger, the cooling liquid and refrigerant compartments are spaced apart and form a sandwich structure with each other. During the convection process, heat is transferred from the cooling liquid to the refrigerant to achieve heat exchange. The efficiency of battery cooling is determined by the power of the Chiller, the power of the water pump, the flow rate of the coolant, and the flow rate of the refrigerant. 

The compressor is the "heart" of the air-conditioning system. Its function is to inhale and compress the low-temperature and low-pressure gaseous refrigerant from the low-pressure side to increase its temperature and pressure, and then pump it into the high-pressure side to become a high-temperature and high-pressure gaseous refrigerant. The key to the low pressure side and high pressure side of the air conditioning circuit.

Compressors on fuel vehicles are generally driven by the engine belt. At present, the product technology of electric compressors is relatively mature, which can be divided into rotary (rotary vane, scroll and rotor type) and reciprocating piston type (swash plate type and crank-connected type). Rod type) two categories, commonly used in traditional fuel-driven passenger cars are swash plate type, scroll type and rotary vane type, among which swash plate compressor is the leading product of reciprocating compressor, which has been developed for many years. The technology is relatively mature, mainly used in large-displacement passenger cars, but the energy consumption is high.

New energy vehicles are driven by electricity, so only electric compressors can be used. Compared with belt-driven compressors, electric compressors require an additional motor and controller, so their value is significantly improved compared to traditional compressors.

From the perspective of technology and market trends, considering that new energy vehicles have higher energy consumption and noise requirements than traditional vehicles, especially heat pump air conditioning systems require compressors with high compression performance, so their technical barriers are high, and the current global market The pattern is still dominated by mainstream compressor manufacturers, such as Denso, Japan's Sanden, and Hanon (three companies account for more than 80%). Among the domestic manufacturers, Autoga has a relatively high share of its own brands, and household air conditioner giants such as Gree have also begun to enter the field of vehicle heat pump air conditioners with the help of powerful electric compressor technology. At present, the main electric compressors adopt scroll-type solutions with the advantages of high efficiency, low noise, stable operation, and small size. flow rate, thereby improving the heating performance of the heat pump air conditioner.