Effects of pulse and DC charging on lithium iron phosphate (LiFePO4) batteries

Resonant converters which use a small DC bus capacitor to achieve high power factor are desirable for low cost Inductive Power Transfer (IPT) applications but produce amplitude modulated waveforms which are then present on any coupled load. The modulated coupled voltage produces pulse currents which could be used for battery charging purposes. In order to understand the effects of such pulse charging, two Lithium Iron Phosphate (LiFePO4) batteries underwent 2000 cycles of charge and discharging cycling utilizing both pulse and DC charging profiles. The cycling results show that such pulse charging is comparable to conventional DC charging and may be suitable for low cost battery charging applications without impacting battery life.

[1]  P. Kohl,et al.  The effects of pulse charging on cycling characteristics of commercial lithium-ion batteries , 2001 .

[2]  M. Heuer,et al.  Experimental analysis of lithium iron phosphate battery performances , 2010, 2010 IEEE International Symposium on Industrial Electronics.

[3]  S. Bala,et al.  The effect of low frequency current ripple on the performance of a Lithium Iron Phosphate (LFP) battery energy storage system , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[4]  P. Kohl,et al.  Studies on the cycle life of commercial lithium ion batteries during rapid charge–discharge cycling , 2001 .

[5]  John Boys,et al.  A practical 1.2kW Inductive Power Transfer lighting system using AC processing controllers , 2011, 2011 6th IEEE Conference on Industrial Electronics and Applications.

[6]  Wu-Shun Jwo,et al.  Design and Implementation of a Charge Equalization Using Positive/Negative Pulse Charger , 2007, 2007 IEEE Industry Applications Annual Meeting.

[7]  A. Chih-Chiang Hua,et al.  Charge and discharge characteristics of lead-acid battery and LiFePO4 battery , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[8]  Grant A. Covic,et al.  The design of a contact-less energy transfer system for a people mover system , 2000, PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409).

[9]  C.-Y. Huang,et al.  Single-phase unity power-factor inductive power transfer system , 2008, 2008 IEEE Power Electronics Specialists Conference.

[10]  G.A. Covic,et al.  Regulator capacitor selection for series compensated IPT pickups , 2008, 2008 34th Annual Conference of IEEE Industrial Electronics.

[11]  Zechang Sun,et al.  Performance and characteristic research in LiFePO4 battery for electric vehicle applications , 2009, 2009 IEEE Vehicle Power and Propulsion Conference.

[12]  John T. Boys,et al.  Stability and control of inductively coupled power transfer systems , 2000 .

[13]  Grant A. Covic,et al.  Practical considerations for designing IPT system for EV battery charging , 2009, 2009 IEEE Vehicle Power and Propulsion Conference.

[14]  J. Lopez,et al.  Fast-charge in lithium-ion batteries for portable applications , 2004, INTELEC 2004. 26th Annual International Telecommunications Energy Conference.

[15]  Pascal Venet,et al.  Impact of Periodic Current Pulses on Li-Ion Battery Performance , 2012, IEEE Transactions on Industrial Electronics.

[16]  Liang-Rui Chen,et al.  Design of Duty-Varied Voltage Pulse Charger for Improving Li-Ion Battery-Charging Response , 2009, IEEE Trans. Ind. Electron..