New energy vehicles refer to the use of unconventional vehicle fuels as the power source (or the use of conventional vehicle fuels, the use of new vehicle power units), the integration of advanced technologies in vehicle power control and driving, and the formation of advanced technical principles. New technology, new structure of the car.
New energy vehicles include four major types of hybrid electric vehicles (HEV), pure electric vehicles (BEV, including solar vehicles), fuel cell electric vehicles (FCEV), and other new energy vehicles (such as super capacitors, flywheels and other high-efficiency energy storage) vehicles Wait.
Hybrid Electric Vehicle (HEV)
Hybrid powertrains are those that use conventional fuels with an electric motor/engine to improve low-speed power output and fuel consumption. According to whether external charging is possible, it can be divided into plug-in hybrid electric vehicles (PHEV) and non-plug-in hybrid electric vehicles (MHEV).
Advantages of MHEV: The maximum power of the internal combustion engine can be determined according to the average required power, and the fuel consumption is low and pollution is low. When the power of the high-power internal combustion engine is insufficient, it is supplemented by the battery; when the load is small, the surplus power can generate electricity to charge the battery. Since the internal combustion engine can continue to work, the battery can be continuously charged, so its journey is the same as that of an ordinary car; because of the battery , It can easily recover the energy during braking, downhill, and idling; in prosperous urban areas, the internal combustion engine can be shut down and driven by the battery alone to achieve “zero” emissions; It can keep the battery in a good working condition without overcharging and overdischarging, prolong its service life and reduce costs.
Disadvantages: Long-distance high-speed driving basically does not save fuel.
PHEV advantages: Contains all the advantages of the above non-plug-in hybrid vehicles; usually has a much longer pure electric range than non-plug-in hybrid vehicles, and daily commuting can be completely electric.