Research on Key Factors for Range and Energy Consumption of Electric Vehicles
Published April 2, 2019 by SAE International in United States
Downloadable datasets for this paper availableAnnotation of this paper is available
Investigations were conducted to examine the potential to optimize the energy consumption and drive range of Electric Vehicles (EV). Theoretically, the energy consumption is strongly influenced by: 1) system efficiency, 2) coasting resistance, 3) energy recovery technology. These three factors are studied in detail through both simulation tool and experimental test. Research was performed on a Changan EV sedan to explore the influence of each factor on energy consumption and drive range. The most paramount factor is vehicle coasting resistance, followed by drivetrain system efficiency. To reduce coasting resistance, tires with low resistance coefficient, low friction brake clamps, and the modification of vehicle styling can all be applied. Drivetrain efficiency includes motor efficiency, inverter efficiency, and gearbox efficiency. Interestingly, the impact of energy recovery technology is sensitive to driving conditions. I-pedal technology which can supply deceleration up to 0.2g has little influence over NEDC (New European Drive Cycle) but can extend the range over real-world driving by up to 10%. This is because the regenerating potential is higher in real world driving (higher acceleration and deceleration). In summary, with all feasible approaches applied on the test vehicle, energy consumption was reduced by 11.5%. The predominant factor, coasting resistance, contributed 5.5% to energy consumption reduction and 6.5% to range increase. Improving powertrain system efficiency yielded a 3% reduction in energy consumption and a 3.3% increase in drive range.
- Chen Zhao - Chongqing Changan New Energy Auto Co.Ltd.
- Guan Gong - Chongqing Changan New Energy Auto Co.Ltd.
- Cheng Yu - Chongqing Changan New Energy Auto Co.Ltd.
- Ying Liu - Chongqing Changan New Energy Auto Co.Ltd.
- Shu Zhong - Chongqing Changan New Energy Auto Co.Ltd.
- Yanxing Song - Chongqing Changan New Energy Auto Co.Ltd.
- Chenghao Deng - Chongqing Changan New Energy Auto Co.Ltd.
- Anjian Zhou - Chongqing Changan New Energy Auto Co.Ltd.
- Honglu Ye - Chongqing Changan New Energy Auto Co.Ltd.
CitationZhao, C., Gong, G., Yu, C., Liu, Y. et al., "Research on Key Factors for Range and Energy Consumption of Electric Vehicles," SAE Technical Paper 2019-01-0723, 2019, https://doi.org/10.4271/2019-01-0723.
Data Sets - Support Documents
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- Wikipedia, “List of Countries Banning Fossil Fuel Vehicles,” https://en.wikipedia.org/wiki/List_of_countries_banning_fossil_fuel_vehicles, accessed Oct 2018.
- Changan Automobile, “Changan Announces Mission Shangri-La and Launches Three New Energy Models,” http://www.globalchangan.com/article/news_content_324.html, accessed Oct 2018.
- Xinhua Net, “Subsidies for New Energy Cars Expected to be Cut Again in China,” http://www.xinhuanet.com/english/2018-01/18/c_136904970.htm, accessed Oct 2018.
- Arata, M., Kurihara, Y., Misu, D., and Matsubara, M., “EV and HEV Motor Development in TOSHIBA,” 2014 International Power Electronics Conference, IPEC-Hiroshima-ECCE Asia 2014 4(3):1874-1879, 2014, doi:10.1109/IPEC.2014.6869840.
- Momen, F., Rahman, K.M., Son, Y., and Savagian, P., “Electric Motor Design of General Motors’ Chevrolet Bolt Electric Vehicle,” SAE Int. J. Alt. Power. 5(2):286-293, 2016, doi:10.4271/2016-01-1228.
- Yamaguchi, K., Katsura, K., and Jikumaru, T., “Motor Loss and Temperature Reduction with High Switching Frequency SiC-Based Inverters,” 2017 IEEE 5th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2017 2017-Decem (2017), 2017, 127-31, 10.1109/WiPDA.2017.8170534.
- Zhao, T.Z.T., Wang, J.W.J., Huang, A.Q., and Agarwal, A., “Comparisons of SiC MOSFET and Si IGBT Based Motor Drive Systems,” 2007 IEEE Industry Applications Annual Meeting, 2007, 331-35, 10.1109/07IAS.2007.51.
- Hofman, T. and Dai, C.H., “Energy Efficiency Analysis and Comparison of Transmission Technologies for an Electric Vehicle,” IEEE Vehicle Power and Propulsion Conference (VPPC) 1-6, 2010, doi:10.1109/VPPC.2010.5729082.
- Ren, Q., Crolla, D.A., and Morris, A., “Effect of Transmission Design on Electric Vehicle (EV) Performance,” 5th IEEE Vehicle Power and Propulsion Conference, VPPC ’09, 2009, 1260-65. 10.1109/VPPC.2009.5289707.
- Palin, R., Johnston, V., Johnson, S., D’Hooge, A. et al., “The Aerodynamic Development of the Tesla Model S-Part 1: Overview,” SAE Technical Paper 2012-01-0177, 2012, doi:10.4271/2012-01-0177.
- D’Hooge, A., Palin, R.B., Johnson, S., Duncan, B. et al., “The Aerodynamic Development of the Tesla Model S - Part 2: Wheel Design Optimization,” SAE Technical Paper 2012-01-0178, 2012, doi:10.4271/2012-01-0178.
- Barrand, J. and Bokar, J., “Reducing Tire Rolling Resistance to Save Fuel and Lower Emissions,” SAE Int. J. Passeng. Cars - Mech. Syst. 1(1):9-17, 2009, doi:10.4271/2008-01-0154.
- Technical Committee ISO/TC 60, Gears, Subcommittee SC 2, Gear capacity calculation, “Gears-Thermal Capacity-Part 2: Thermal Load-Carrying Capacity,” ISO/TR 14179-2:2001, Rev. July 2001.