A battery power bank of serial battery power modules with buck-boost converters

The operation of a battery power bank with buck-boost battery power modules (BPMs) connected in series is studied. With serial configuration, the output currents of all BPMs are the same as the load current. However, the currents from batteries can be scheduled in accordance with the state-of-charges (SOCs) by adjusting the duty-ratios of the associated power converters for balanced discharging. With such a configuration, in addition to discharge equalization capability, those BPMs with completely exhausted or damaged batteries can be isolated from the battery power bank without interrupting the system operation.

[1]  Bojin Qi,et al.  A Li-ion battery management system based on CAN-bus for electric vehicle , 2008, 2008 3rd IEEE Conference on Industrial Electronics and Applications.

[2]  Gun-Woo Moon,et al.  A modularized two-stage charge equalization converter for series connected lithium-ion battery strings in an HEV , 2008, 2008 IEEE Power Electronics Specialists Conference.

[3]  Chin-Sien Moo,et al.  Operation of battery power modules with series output , 2009, 2009 IEEE International Conference on Industrial Technology.

[4]  T. Stuart,et al.  Sensitivity of a ramp equalizer for series batteries , 1998 .

[5]  Chin-Sien Moo,et al.  Charge equalization of battery power modules in series , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[6]  Wenxiang Chen,et al.  Charge equalization for series connected lithium-ion batteries , 2009, 2009 9th International Conference on Electronic Measurement & Instruments.

[7]  Chris Mi,et al.  Fast battery equalization with isolated bidirectional DC-DC converter for PHEV applications , 2009, 2009 IEEE Vehicle Power and Propulsion Conference.

[8]  Zhang Weige,et al.  Research on the charge mode of series-connected batteries , 2008, 2008 IEEE Vehicle Power and Propulsion Conference.

[9]  Dong-Seok Hyun,et al.  A three-port bidirectional modular circuit for Li-Ion battery strings charge/discharge equalization applications , 2008, 2008 IEEE Power Electronics Specialists Conference.

[10]  F. Gustin,et al.  Energy management strategy for coupling supercapacitors and batteries with DC-DC converters for hybrid vehicle applications , 2008, 2008 13th International Power Electronics and Motion Control Conference.

[11]  Gun-Woo Moon,et al.  A Modularized Charge Equalizer for an HEV Lithium-Ion Battery String , 2009, IEEE Transactions on Industrial Electronics.