Plug-in Hybrid Electric Vehicles (PHEVs) and Range-Extended Electric Vehicles (REEVs) both represent approaches to electrification in transportation, but differ fundamentally in their powertrain architecture. A PHEV incorporates both an internal combustion engine (ICE) and an electric motor, connected to a battery that can be charged from an external power source. The vehicle can operate solely on electric power for a limited range, after which the ICE engages to provide propulsion. An example is a vehicle that can travel 30 miles on electric power before the gasoline engine activates.
The divergence arises with REEVs. While also possessing an ICE and electric motor, the primary function of the ICE is to act as a generator, solely recharging the battery. The wheels are exclusively driven by the electric motor. The engine does not directly contribute to propelling the vehicle. This architecture offers the potential for greater efficiency in certain driving conditions and allows for extended range compared to purely electric vehicles while minimizing reliance on charging infrastructure. These alternative designs address range anxiety concerns and offer practical options for individuals seeking to reduce their carbon footprint.
