In the past two years, the utilization rate and penetration rate of new energy vehicles have continued to increase. Both foreign and domestic brands have increased the speed of R&D and listing of new vehicles. Statistics show that the overall sales growth rate of the automobile industry in 2020 will be -1.9%, and the sales of new energy vehicles will increase by 10.9%, of which the sales of pure electric vehicles will increase by 11.6%, the sales of plug-in hybrid vehicles will increase by 8.4%, and the sales of new energy vehicles and their All segments outperformed the automotive industry as a whole.

For the popularization of pure electric vehicles, the biggest constraint is the cruising range, which largely determines consumers’ willingness to buy. The cruising range is mainly determined by two factors, one is the capacity of the battery, and the other is the power consumption of the electric vehicle. Relatively speaking, the cruising range is often determined by the factory-rated power, which is also related to the driver’s driving habits. Of course, the most important thing is related to power consumption, where the use of air conditioners is the biggest power consumption point.

It is understood that the air conditioners of electric vehicles are no different from ordinary fuel vehicles. In the cooling mode, they mainly rely on a separate refrigeration compressor to work. The power consumption is mainly concentrated on the compressor’s work. Relatively speaking, the energy consumption of fuel vehicles is more small. When heating in winter, fuel vehicles can recycle the high-temperature cycle generated by the engine’s work to increase the temperature in the vehicle. During this process, the compressor will not be started, so there is almost no energy consumption. Although the various components and systems of electric vehicles also generate a certain amount of heat during operation, the power battery generates the most heat, but this heat cannot meet the needs of air conditioning. Therefore, traditional electric vehicles do not use this heat as The “source” of air conditioning and heating, so in order to provide a heat source, electric vehicles will additionally add heat source components PTC. PTC refers to a positive temperature coefficient thermistor, this kind of resistance is positively correlated with temperature. That is, when the ambient temperature decreases, the resistance of the PTC also decreases, so that after the power is turned on, the current will increase under a constant voltage, and the heat generated by the power will increase.

By Haadi