Charge-depleting or EV mode refers to an operation mode of an

electric vehicle An electric vehicle (EV) is a motor vehicle whose propulsion is powered fully or mostly by electricity. EVs encompass a wide range of transportation modes, including road vehicle, road and rail vehicles, electric boats and Submersible, submer ...

powertrain In a motor vehicle, the powertrain comprises the main components that generate engine power, power and deliver that power to the road surface, water, or air. This includes the internal combustion engine, engine, transmission (mechanics), trans ...

that is chiefly dependent on the

energy storage Energy storage is the capture of energy produced at one time for use at a later time to reduce imbalances between energy demand and energy production. A device that stores energy is generally called an Accumulator (energy), accumulator or Batte ...

from the on-board battery pack.

Battery electric vehicle A battery electric vehicle (BEV), pure electric vehicle, only-electric vehicle, fully electric vehicle or all-electric vehicle is a type of electric vehicle (EV) that uses electrical energy exclusively from an electric vehicle battery, on-boa ...

s operate solely in charge-depleting mode, and most

plug-in hybrid A plug-in hybrid electric vehicle (PHEV) or simply plug-in hybrid is a type of hybrid electric vehicle equipped with a rechargeable battery pack that can be directly replenished via a charging cable plugged into an external electric power so ...

s operate in this mode at startup and switch to

charge-sustaining A hybrid electric vehicle (HEV) is a type of hybrid vehicle that couples a conventional internal combustion engine (ICE) with one or more electric engines into a hybrid vehicle drivetrain, combined propulsion system. The presence of the electri ...

mode after the battery has reached its minimum

state of charge State of charge (SOC) quantifies the remaining capacity available in a battery at a given time and in relation to a given state of ageing. It is usually expressed as percentage (0% = empty; 100% = full). An alternative form of the same measure i ...

(SOC) threshold, exhausting the vehicle's

all-electric range All-electric range (AER) is the maximum driving range of an electric vehicle using only power from its on-board battery pack to traverse a given driving cycle. In the case of a Battery electric vehicle (BEV), it means the maximum range per rech ...

(AER). Although there is no technically mandated minimum all-electric range, future state and/or federal legislation may address this for policy purposes. Another charge-depleting strategy is called

blended mode Blended mode is a charge-depleting mode of operation for plug-in hybrid electric vehicles (PHEVs) in which most of the motive energy is supplied by the battery pack but supplemented by the internal combustion engine (ICE). In contrast, all-elec ...

, in which the engine supplements the battery during medium to heavy loads. Although this strategy does not include a purely all-electric mode, early

NREL The National Renewable Energy Laboratory (NREL) in the US specializes in the research and development of renewable energy, energy efficiency, energy systems integration, and sustainable transportation. NREL is a federally funded research and ...

(

National Renewable Energy Laboratory The National Renewable Energy Laboratory (NREL) in the US specializes in the research and development of renewable energy, energy efficiency, energy systems integration, and sustainable transportation. NREL is a federally funded research and ...

) simulations indicate that similar fuel savings as compared to conventional plug-in hybrid battery discharge and charge strategies. One advantage of a blended mode is that it may afford the vehicle designer the opportunity to use a smaller and less costly battery pack and traction motor.

References

External links

Battery Lifetime Analysis and Simulation Tools Suite

Enova Hybrid Drive Installed in First Production Hybrid School Buses

* ttps://www.greencarcongress.com/2006/09/enova_offering_.html Enova Offering its Hybrid Drive Systems for OEM or Retrofit Applications with Plug-In Option
Plug-ins Progress

Enova Systems Confirms Recent Awards Will Utilize Its Unique

Automotive technologies {{automotive-tech-stub