2Pascual C, Krein P T. Switched Capacitor System for Automatic Series Battery Equalization[ C ]. Proc. 12th Annual Applied Power Electronics Conference and Exposition, Vol. 2, Atlanta, GA, Feb. 1997:848-854.
3West S, Krein P T. Equalization of Valve-regulated Lead-acid Bat- teries: Issues and Life Test Results[ C]. Proc. 22"d International Telecommunications Energy Conference, Dresden, Germany, Sept. 2000:439-446.
4Kimball J W, Krein P T. Analysis and Design of Switched Capaci- tor Converters[ C ]. Proc. 20th Annual IEEE Applied Power Elec- tronics Conference and Exposition, Vol. 3, Mar: 2005:1473 - 1477.
5Isaacson M J, Hoolandsworth R P, Giampaoli P J. Advanced Lith- ium Ion Battery Chargel[ C]. Proc. 25th Annual Battery Confer- ence on Applications and Advances, Jan. 2000:193-198.
6Nishijima K, Sakamoto H, Harada K. A PWM Controlled Simple and High Performance Battery Balancing System[ C]. Proc. IEEE 31 st Annual Power Electronics Specialists Conference, 2000 : 517 - 520.
7Lee Yuang-Shung, Cheng Mingwang. Intelligent Control Battery E- qualization for Series Connected Lithium-lon Battery Strings [ J ]. IEEE Transactions on Industrial Electronics, 2005,52 ( 5 ) : 1297 - 1307.
8Wang Liye, Wang Lifang, Liao Chenglin. Based on Energy Trans- ferring for Battery Packs Applied on Electric Vehicle [ C ]. 2010 International Conference on Computer and Communication Tech- nologies in Agriculture Engineering,2010:271-274.
9Markus Einhom, Wemer Roessler, Juergen Fleig. improved Per- formanee of Serially Connected Li-Ion Batteries with Active Cell Balancing in Electric Vehicles[ J]. IEEE Transactions on Vehicu- lar Technology,2011,60 (6) :2448-2457.