Pure electric vehicles have short driving range and long charging times, which have seriously constrained the rapid development of the industry. Installing an extender composed of an engine, generator, rectifier, and controller on pure electric vehicles can effectively solve this problem.

Before the fundamental problems of pure electric vehicles are solved, reasonable power parameter matching is crucial. The three-step design method is used for structural configuration and parameter matching; a parameter matching method that combines engineering analysis and simulation results is proposed; research shows that the control strategy is a bridge between the driver's intent and vehicle performance communication. A good control strategy can compensate for deficiencies in parameter matching, enable each vehicle component to operate within a reasonable range, and improve service life.

Conventional range-extended electric vehicles are mostly used in buses. Buses can propose energy allocation solutions that meet their characteristics according to specific urban cycling conditions. The extender makes greater use of the city's grid electricity to achieve pure electric driving, operates in the most reasonable range of the engine, and reduces fuel consumption and air pollution.