Charge-depleting or EV mode refers to a mode of vehicle operation that is dependent on the energy from the

battery pack A battery pack is a set of any number of (preferably) identical batteries or individual battery cells. They may be configured in a series, parallel or a mixture of both to deliver the desired voltage, capacity, or power density. The term battery ...

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 exclusively uses chemical energy stored in rechargeable battery packs, wi ...

s operate solely in this mode. Most

plug-in hybrid A plug-in hybrid electric vehicle (PHEV) is a hybrid electric vehicle whose battery pack can be recharged by plugging a charging cable into an external electric power source, in addition to internally by its on-board internal combustion engin ...

s operate in charge-depleting mode at startup, and switch to

charge-sustaining A hybrid electric vehicle (HEV) is a type of hybrid vehicle that combines a conventional internal combustion engine (ICE) system with an electric propulsion system (hybrid vehicle drivetrain). The presence of the electric powertrain is intended ...

mode after the battery has reached its minimum state of charge (SOC) threshold, exhausting the vehicle's all-electric range (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, 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 (

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

* ttp://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

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