Zusammenfassung
Aktiver Ladungsausgleich ist eine typische Methode, um die nutzbare Energie in einer Batterie, bestehend aus in Serie geschalteten Einzelzellen mit unterschiedlichen Kapazitäten, zu erhöhen. In diesem Artikel wird daher eine Möglichkeit des aktiven Ladungsausgleichs mit einem DC/DC-Konverter aufbauend auf einem multiplen Transformator beschrieben. Die Vorteile werden anhand eines Prototyps mit zwölf Lithium-Ionen-Zellen dargestellt. Weiters wird der Einfluss der Kapazitäten der Einzelzellen und des Ausgleichstroms auf die nutzbare Energie in der Batterie untersucht.
Summary
Active charge balancing is a commonly used method to increase the usable energy of a battery stack with serially connected battery cells with different cell capacities. In this article an active charge balancing method with a multiple winding transformer DC/DC converter is described. The advantage of active charge balancing is shown using a prototype with twelve serially connected Lithium ion battery cells. Moreover, the influence of the cell capacity variance and the influence of the balancing current on the discharging energy is investigated.
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References
Atmel. Active Cell Balancing Methods for Li-Ion Battery Management ICs using the ATA6870. Application Note, 2010
Bentley, W. Cell balancing considerations for lithium-ion battery systems. Proceedings of the 12th Annual Battery Conference on Applications and Advances, pp. 223–226, 1997
Bonfiglio, C., Roessler, W. A cost optimized battery management system with active cell balancing for lithium ion battery stacks. Proceedings of the 5th IEEE Vehicle Power and Propulsion Conference (VPPC), pp. 304–309, 7–10, 2009
Cadar, D., Petreus, D., Patarau, T. An energy converter method for battery cell balancing. 33rd Int. Spring Seminar on Electronics Technology, pp. 290–293, 2010
Dellantoni, N., Harjung, J., Meschik, M., Pohl, A. Energiespeicheranordnung und Verfahren zum Betrieb einer derartigen Anordnung. AT Patent 08P006 pending, 2008
Einhorn, M., Fleig, J. Improving of active cell balancing by equalizing the cell energy instead of the cell voltage. Proceedings of the 25th International Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exposition (EVS25), 2010
Einhorn, M., Conte, V., Kral, C., Niklas, C., Popp, H., Fleig, J. A modelica library for simulation of elecric energy storages. Proceedings of the 8th International Modelica Conference, 2011a
Einhorn, M., Guertlschmid, W., Blochberger, T., Kampusch, R., Permann, R., Conte, F. V., Fleig, J. A current equalization method for serially connected battery cells using a single power converter for each cell. IEEE Transactions on Vehicular Technology, vol. 60, pp. 4227–4237, 2011b
Einhorn, M., Permann, R., Guertlschmid, W., Blochberger, T., Fleig, J. A current equalization method for serially connected battery cells. Proceedings of the 7th IEEE International Vehicle, Power and Propulsion Conference (VPPC), 2011c
Einhorn, M., Roessler, W., Fleig, J. Improved performance of serially connected li-ion batteries with active cell balancing in electric vehicles. IEEE Transactions on Vehicular Technology, vol. 60, pp. 2448–2457, 2011d
FTP72 Urban Dynamometer Driving Schedule (UDDS). U.S. Environmental Protection Agency, 1996
Guerin, J., Liu, W. Cell balancing algorithm verification through a simulation model for lithium ion energy storage systems. SAE International, 2010
Hopkins, D., Mosling, C., Hung, S. Dynamic equalization during charging of serial energy storage elements. IEEE Transactions on Industry Applications, vol. 29, no. 2, pp. 363–368, mar/apr 1993
Hsie, Y. C., Chou, S. P., Moo, C. S. Balance discharging for series-connected batteries. Proceedings of the 35th Annual IEEE Power Electronics Specialist Conference, pp. 2697–2702, 2004
Hung, S., Hopkins, D., Mosling, C. Extension of battery life via charge equalization control. IEEE Transactions on Industrial Electronics, vol. 40, no. 1, pp. 96–104, feb 1993
Iwasawa, K., Inoue, T., Koizumi, H. Novel voltage equalizer using series/parallel switching capacitors. Proceedings of the 2nd IEEE International Conference on Sustainable Energy Technologies (ICSET), 2010
Jian Cao, N. S., Emadi, A. Battery balancing methods: A comprehensive review. Proceedings of the 4th IEEE Vehicle Power and Propulsion Conference (VPPC), 2008
Kimball, J. W., Kuhn, B. T., Krein, P. T. Increase performance of battery packs by active equalization. Proceedings of the 3rd IEEE Vehicle Power and Propulsion Conference (VPPC), pp. 323–327, 2007
Kultgen, M. Managing high-voltage lithium-ion batteries in hevs. EDN: Information, News, and Business Strategy for Electronics Design Engineers, April 2009
Kutkut, N., Divan, D. Dynamic equalization techniques for series battery stacks. Proceedings of the 18th IEEE International Telecommunications Energy Conference (INTELEC), pp. 514–521, 6–10 1996
Linear Technology. LTC6802-1 Multicell Battery Stack Monitor, 02 2009
Lukic, S. M., Emadi, A. Charging ahead. IEEE Industrial Electronics Magazine, December 2008
Maxwell Technologies. Maxwell Active Cell Voltage Management Electronics, 1st ed., 2007
Mochel, C. Aktives Balancing fuer Lithium-Ionen Zellen – Mehr Reichweite durch aktiven Ladungsausgleich!" Automotive, vol. 9, pp. 12–15, 2010
Mohan, N., Undeland, T. M., Robbins, W. P. Power Electronics – Converters, Applications, and Design, 2nd ed. John Wiley and Sons, 1995
Moore, S. W., Schneider, P. J. A review of cell equalization methods for lithium ion and lithium polymer battery systems. Society of Automotive Engineers, January 2001
Moore, S. W., Stevens, P. An investigation of cell balancing and equalization for lithium-ion battery packs. Proceedings of the 21st Annual Electric Vehicle Symposium EVS21, 2005
Moran, J. PowerPump Balancing. Texas Instruments Application Report, 2009
Nishijima, K., Sakamoto, H., Harada, K. A pwm controlled simple and high performance battery balancing system. Proceedings of the 31st IEEE Annual Power Electronics Specialists Conference (PESC), vol. 1, pp. 517 –520, 2000
Roessler, W. Aktiver Ladungsausgleich fuer Lithium-Ionen Batterien. ATZelektronik, vol. 3, February 2008a
Roessler, W., Infineon Technologies. Boost battery performance with active charge-balancing. EE Times-India, July 2008b
Shin, J.-W., Seo, G.-S., Chun, C.-Y., Cho, B.-H. Selective flyback balancing circuit with improved balancing speed for series connected lithium-ion batteries. Proceedings of the International Power Electronics Conference (IPEC), pp. 1180–1184, 2010
Tikonov, V. Battery Optimization System and Method of Use. US Patent 7 489 106B1, 2009
Wen, S., Texas Instruments. Cell balancing buys extra run time and battery life. Analog Applications Journal, 1Q 2009
Wei, X., Zhao, X., Haifeng, D. The application of flyback dc/dc converter in li-ion batteries active balancing. Proceedings of the 5th IEEE Vehicle Power and Propulsion Conference (VPPC), pp. 1654 –1656, 7-10 2009a
Wei, X., Zhu, B. The research of vehicle power li-ion battery pack balancing method. Proceedings of the 9th IEEE International Conference on Electronic Measurement and Instruments, August 2009b
Zach, F. Leistungselektronik: Ein Handbuch, 4th ed. Springer, 2009, vol. 1
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Einhorn, M., Rößler, W., Conte, F. et al. Charge balancing of serially connected lithium-ion battery cells in electric vehicles. Elektrotech. Inftech. 129, 167–173 (2012). https://doi.org/10.1007/s00502-012-0097-x
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DOI: https://doi.org/10.1007/s00502-012-0097-x