The e-vehicle family
Electric vehicles cover a spectrum – from those that are mainly mechanically driven to those that are exclusively electrically driven:
Mild Hybrid (mHEV).
Mild Hybrids are powered by a combustion engine, enhanced by an compact electric motor (<20kW) as additional booster, e.g. 48 Volt recuperating system. It supports the combustion engine to lower fuel consumption and providing improved low-end torque. Mild Hybrids do not have an exclusively electrical means of transportation.
Full / Strong Hybrid (sHEV).
A vehicle with a combustion engine and a battery-powered engine. It is powered by the combustion engine, but at slow speeds (up to 50kph) and short distances (ca. 3km), also pure electric propulsion is possible. The electricity needed to operate the electric engine is produced by the combustion engine.
Plug-in Hybrid Electric Vehicle (PHEV).
Like a Full Hybrid, but PHEVs can drive higher speeds (up to 130kph) and longer distances (ca. 40km) on electric power only. The combustion engine recharges the battery, if power is insufficient. The battery can be charged by an external power supply.
Range Extender Vehicle (E-REV).
A battery electric vehicle that includes a small auxiliary combustion engine solely for the purpose of recharging the battery. In contrast to the Plug-in Hybrid, the range extender is not able to run the vehicle mechanically.
Battery Electric Vehicle (BEV).
Runs exclusively on an electric engine powered by a battery, no fossil fuel is therefore needed. The battery is charged by external power supplies. Locally 100% free of emissions.
Fuel Cell Electric Vehicles (FCEV).
The FCEV runs solely on an electric engine, too, but in contrast to the BEV the electricity is generated by hydrogen fuel cells instead of batteries. Hydrogen fuel cells generate electricity by combining hydrogen with oxygen. Like the BEV, the FCEV is locally 100% free of emissions.