However, the current shortage of oil resources and the worsening environment have led automobile companies in various countries to consider transforming from traditional internal combustion engine vehicles to new energy electric vehicles, which has also brought development opportunities to the Chinese automobile industry. Vigorously developing new energy electric vehicles and mastering their key technologies will enable Chinese automobile companies to take the lead in future global competition and occupy a leading position in the automobile industry.

Electric vehicles refer to vehicles that use all or part of the electric energy to drive the motor as a power system. At present, according to the driving equipment, electric vehicles are mainly divided into three categories: pure electric vehicles (PEV), hybrid electric vehicles (HEV) and fuel cell vehicles (FCEV). Electric vehicles have significant advantages such as high efficiency, energy saving, low noise, and zero emissions, and have incomparable advantages in environmental protection and energy saving.

Due to the current limited battery energy storage, electric vehicles have the problem of short driving range. Consider using a range extender (Range-Extender) on electric vehicles to increase the driving range of electric vehicles.

The range extender (Range-Extender) is an additional energy storage component installed on electric vehicles to increase the driving range of electric vehicles. Usually, users can choose to install or not install it according to their mileage requirements when traveling (reducing vehicle weight can reduce energy consumption).

Main performance of the range extender:

(1) The system is reliable and can immediately enter the working state after a long standby period.

(2) Due to the single working condition, the working point can be better optimized to reduce system cost and improve efficiency.