Three-Stage Precise Converter in EV Charging-Discharging-Storage Integration Station

Abstract:

Converter in EV (electric vehicle) charging-discharging-storage integration station must satisfy the correlation objects. These include: lower harmonic and higher energy conversion efficiency, benefits to battery life, adaption to different batteries, and adjustable charging current. In this paper, we propose a three-stage circuit topology, based on precise charging control, which is able to accomplish these goals on a lithium ion polymer battery pack. It is expected that the converter will also work well on other battery chemistries. In order to use three-stage converter to charge precisely, we need to first design each stage circuit and control strategy. The final strategy can accurately capture the voltage of each DC bus and the charging current of a cell. We also give the analysis of factors affecting battery life and energy conversion efficiency, whereby the three-stage converter is in practice. Comparing with charging simulations of batteries in conventional converter, those in three-stage converter are conducted. Results are presented that that it is possible to achieve more precise charging in integrality of battery charging and extension of battery life than the conventional converter expected in an implementation.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 1650-1658
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.1650
• Online since: September 2013
• Authors: Yu Jian Jia*, Da Xie, Xin Yu Fang, Jun Qi Feng
• Keywords: Battery Life, Charging-Discharging-Storage Integration Station, EV, Precise Charging, Three-Stage Circuit

References

[1] WANG Xiangqin. Existing Bottleneck Problems and Counter measures in China's Electric Vehicle Development[J]. Electric Power Technologic Economics, 2011, 23(3): 1-5+10(in Chinese).

[2] ZHANG Wenliang, WU Bin, LI Wufeng, et al. Discussion on development trend of battery electric vehicles in China and its energy supply mode [J]. Power System Technology, 2009, 33(4): 1-5(in Chinese).

[3] YAO Jianxin, WANG Mei, LUO Weiming. Construction and application of charging systems for electric mobiles [J]. East China Electric Power, 2008, 36(8): 107-110(in Chinese).

[4] HU Zechun, SONG Yonghua, LUO Zhiwei, et al. Impacts and Utilization of Electric Vehicles Integration Into Power Systems [J]. Proceedings of the CSEE, 2012, 32(4): 1-10(in Chinese).

[5] Fernandez L P ， Roman T G S ， Cossent R ． Assessment of the impact of plug-in electric vehicles on distribution networks[J]．IEEE Trans. On Power System，2011，26(1)：206-213.

DOI: 10.1109/tpwrs.2010.2049133

[6] Clement-Nyns K，Haesen E，Driesen J．The impact of charging plug-in hybrid electric vehicles on a residential distribution grid[J]．IEEE Trans. on Power Systems，2010, 25(1)：371-380.

DOI: 10.1109/tpwrs.2009.2036481

[7] Hubner M，Zhao L，Mirbach T，et al．Impact of large-scale electric vehicle application on the power supply [C]. Electrical Power & Energy Conference．Montreal：IEEE，2009：1-6.

DOI: 10.1109/epec.2009.5420866

[8] WU Tiezhou, CHEN Xueguang, ZHANG Jie, et al. Hybrid equalization of series HEV Lithium-ion batteries [J]. J. Huazhong Univ. of Sci. & Tech. (Natural Science Edition), 2011, 39(2): 102-104+119(in Chinese).

[9] HUANG Kun. Research on the factors affecting cycle life of lithium-ion battery [J]. Chinese Battery Industry, 2001 6(1): 29-31(in Chinese).

[10] LI Na, HUANG Mei. Analysis on Harmonics Caused by Connecting Different Types of Electric Vehicle Chargers With Power Network [J]. Power System Technology, 2011, 35(1): 170-174(in Chinese).

[11] Ouyang Qian, Wu Guoliang, Qian Zhaoming. Optimal Design Consider ations of the LLC Resonant Full-Bridge DC/DC Conver ter [J]. Power Electronics, 2007, 41(1): 15-16+19(in Chinese).

DOI: 10.1109/tpel.2005.869748

[12] Lv Zhaorui, Zhang Junhong, ZhaoJinghong. Analysis and design of a zero-voltage zero-current-switching full-bridge PWM converter [J]. Power Electronics, 2003, 37(5). 36-38(in Chinese).

DOI: 10.1109/apec.2003.1179352

[13] Xue Yali, Li Bin, Ruan Xinbo. Buck three-level mconverter [J]. Transactions of China Electrotechnical Society, 2003, 18(3): 29-35(in Chinese).

[14] ZHAO Biao, YU Qingguang, WANG Liwen, et al. Bi-directional Extensible Converter and Its Distributed Control Strategy for Battery Energy Storage Grid-connected System[J]. Proceedings of the CSEE, 2011, 31(Supplyment): 244-251.

[15] CHEN Lezhu, LIU Yanfei. Digital control algorithms for DC/DC converters based on capacitor charge balance [J]. TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY, 2009, 24(5): 80-85(in Chinese).

[16] A. Di Fillipi, S. Stockar, S. Onori, et al. Model-Based Life Estimation of Li-ion Batteries in PHEVs Using Large Scale Vehicle Simulations: An Introductory Study[C]. Vehicle Power and Propulsion Conference. 2010: 1-6.

DOI: 10.1109/vppc.2010.5729020

[17] MIN CHEN and RINCON-MORA, G.A., Accurate Electrical Battery Model Capable of PredictingRuntime and I–V Performance, IEEE Transactions on Energy Convertion, vol. 21, pp.504-511, June (2006).

DOI: 10.1109/tec.2006.874229