Factors affecting electric vehicle energy consumption
- 28 June 2011
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Sustainable Engineering
- Vol. 4 (3), 192-201
- https://doi.org/10.1080/19397038.2011.592956
Abstract
Internal combustion (IC) engines waste a majority of the energy they consume, with only 20% actually going into moving the vehicle. The drivetrains of electric vehicles (EVs) can operate at over 80% efficiency which shows that they have great potential in reducing the transportation energy demand. This paper initially quantifies the energy needed to run an EV, having similar dimensions and performance to modern IC vehicles. Simple range and cost calculations were used to establish the advancements needed in battery technology to match the ranges of IC vehicles. Factors affecting EV energy consumption are then addressed, with the aid of MATLAB® simulations, to ascertain what variations can be expected in real-world situations and the benefits of optimising vehicle parameters. The results are then compared with conventional and hybrid IC vehicles. It is shown that an optimised EV can achieve a 63% ‘tank-to-wheels’ energy reduction over the best conventional IC vehicles available, and 60% over hybrids. The effects of either a badly optimised EV, hard acceleration during the driving cycle, or constant large accessory power draws, such as heaters and demisters, are each shown to increase the EVs energy consumption by 70%/km. To achieve the performance and practicalities comparable with modern IC vehicles, new battery technologies with specific energies of >300 Wh/kg are required.Keywords
This publication has 16 references indexed in Scilit:
- Modeling the prospects of plug-in hybrid electric vehicles to reduce CO2 emissionsApplied Energy, 2011
- Energy analysis of electric vehicles using batteries or fuel cells through well-to-wheel driving cycle simulationsJournal of Power Sources, 2009
- Energy recovery for battery electric vehiclesProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2008
- Environmentally Conscious TransportationPublished by Wiley ,2008
- Toward Real-Time Simulation of Physics Based Lithium-Ion Battery ModelsElectrochemical and Solid-State Letters, 2007
- Modelling the acceleration and braking characteristics of a fuel-cell electric sports vehicle equipped with an ultracapacitorProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2007
- Economic and environmental comparison of conventional, hybrid, electric and hydrogen fuel cell vehiclesJournal of Power Sources, 2006
- Real-world fuel economy and emission levels of a typical EURO-IV passenger vehicleProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2005
- Effect of Porosity on the Capacity Fade of a Lithium-Ion BatteryJournal of the Electrochemical Society, 2004
- ADVISOR 2.1: a user-friendly advanced powertrain simulation using a combined backward/forward approachIEEE Transactions on Vehicular Technology, 1999