The difference with non-plug-in hybrid electric vehicles

At present, the state has given a clear definition of new energy vehicles, that is, new energy vehicles include plug-in hybrid electric vehicles, pure electric vehicles and fuel cell vehicles. Due to the low energy density of traditional hybrid electric vehicles (power battery capacity is generally less than 1.5 kWh), there is no need for external charging, only by the recovery of kinetic energy during braking to charge the power battery or by using the excess power of the engine when the vehicle is driving at low speed through the generator (motor reversal) to charge the power battery. Plug-in hybrid cars can run in pure electric mode. It can also be driven in hybrid mode where the engine and drive electric motor work together. When driving in hybrid mode, the working principle is no different from that of ordinary hybrid vehicles. The driving motor, as an auxiliary driving mechanism, mainly plays the role of "peak cutting and valley filling" to help the engine work in a relatively stable state, thus reducing the fuel consumption and emissions of the vehicle; When driving in pure electric mode, only the power battery pack supplies energy, so as to achieve pure electric drive and zero emissions, so it needs external charging after the power battery pack is exhausted, so it is called plug-in hybrid electric vehicle.