How many types of hybrid systems are there?

[AshlynLee]

Hybrid vehicles have two structural forms: series and parallel. Classification by degree: Micro hybrid system, whose motor does not provide continuous power for vehicle driving; Mild hybrid system, represented by General Motors' hybrid pickup trucks; Full hybrid system, which uses 272-650V high-voltage starter motors with a higher degree of hybridization. Classification by drive: Series hybrid electric vehicles (HEVs), mainly composed of three major powertrains: engine, generator, and drive motor, forming an HEV power system in series; Parallel hybrid electric vehicles, where both the engine and generator are powertrains, and the power of the two major powertrains can be superimposed or output separately; Hybrid hybrid electric vehicles, mainly composed of three major powertrains: engine, electric generator, and drive motor.