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LiFePO4 batteries are suitable for high power applications because of their advantages of large discharge current and high efficiency. Owing to the characteristics of LiFePO4 batteries, it may cause overcharge/over-discharge and reduce the cycle life of the battery when series-connected batteries are used. This study proposes a charge equaliser based on an interleaved active clamp flyback converter. The interleaved topology reduces the output ripple current. Therefore the rectifier diode conduction loss can be reduced. With a clamp capacitor and leakage inductance, the switches are turned on with zero-voltage switching while the voltage stress of switch is reduced. Furthermore, a constant switching frequency and duty ratio are designed to achieve a simple control for the proposed system. The simulations and experimental results are provided to verify the performance of the proposed charge equaliser.
References
-
-
1)
-
21. Kim, H.-S., Park, K.-B., Seong, H.-W., Moon, G.-W., Youn, M.-J.: ‘Flyback battery equalizer with voltage doubler rectifier’. Eighth Int. Conf. on Power Electronics, 2011, pp. 291–295.
-
2)
-
34. Chen, W.L., Cheng, S.R.: ‘Optimal charge equalization control for series-connected batteries’, IET Gener. Transm. Distrib., 2013, 7, (8), pp. 843–854 (doi: 10.1049/iet-gtd.2013.0075).
-
3)
-
A.C. Baughman ,
M. Ferdowsi
.
Double-tiered switched-capacitor battery charge equalization technique.
IEEE Trans. Ind. Electron.
,
6 ,
2277 -
2285
-
4)
-
14. Wai, R.J., Jhung, S.J.: ‘Design of energy-saving adaptive fast-charging control strategy for Li-FePO4 battery module’, IET Power Electron., 2012, 5, (9), pp. 1684–1693 (doi: 10.1049/iet-pel.2012.0172).
-
5)
-
17. Xu, A., Xie, S., Liu, X.: ‘Dynamic voltage equalization for series-connected ultra-capacitors in EV/HEV applications’, IEEE Trans. Veh. Technol., 2009, 58, (8), pp. 3981–3987 (doi: 10.1109/TVT.2009.2020990).
-
6)
-
M. Uno ,
K. Tanaka
.
Influence of high-frequency charge–discharge cycling induced by cell voltage equalizers on the life performance of lithium-ion cells.
IEEE Trans. Veh. Technol.
,
4 ,
1505 -
1515
-
7)
-
7. Huang, S.J., Huang, B.G., Pai, F.S.: ‘An approach to measurements of electrical characteristics of lithium-ion battery with open-circuit voltage function’, IET Power Electron., 2012, 5, (9), pp. 1968–1975 (doi: 10.1049/iet-pel.2012.0070).
-
8)
-
25. Moo, C.-S., Ng, K.S., Hsieh, Y.-C.: ‘Parallel operation of battery power modules’, IEEE Trans. Energy Convers., 2008, 23, (2), pp. 701–707 (doi: 10.1109/TEC.2007.914310).
-
9)
-
O. Caumont ,
P. Le Moigne ,
C. Rombaut ,
X. Muneret ,
P. Lenain
.
Energy gauge for lead-acid batteries in electric vehicles.
IEEE Trans. Energy Convers.
,
3 ,
354 -
360
-
10)
-
N.H. Kutkut ,
H.L.N. Wiegman ,
D.M. Divan ,
D.W. Novotny
.
Design considerations for charge equalization of an electric vehicle battery system.
IEEE Trans. Ind. Appl.
,
1 ,
28 -
35
-
11)
-
36. Imai, T., Yamaguchi, H.: ‘Dynamic battery charging voltage optimization for the longer battery runtime and lifespan’. Second IEEE Global Conf. on Consumer Electronics, 2013, pp. 219–223.
-
12)
-
13. Kim, C.-H., Kim, M.-Y., Moon, G.-W.: ‘A modularized charge equalizer using a battery monitoring IC for series-connected li-ion battery strings in electric vehicles’, IEEE Trans. Power Electron., 2013, 28, (8), pp. 3779–3787 (doi: 10.1109/TPEL.2012.2227810).
-
13)
-
22. Kim, H.-S., Park, K.-B., Park, S.-H., Moon, G.-W., Youn, M.-J.: ‘A new two-switch flyback battery equalizer with low voltage stress on the switches’. First IEEE Energy Conversion Congress and Exposition, 2009, pp. 511–516.
-
14)
-
10. Kim, C.-H., Kim, M.-Y., Park, H.-S., Moon, G.-W.: ‘A modularized two-stage charge equalizer with cell selection switches for series-connected lithium-ion battery string in an HEV’, IEEE Trans. Power Electron., 2012, 27, (8), pp. 3764–3774 (doi: 10.1109/TPEL.2012.2185248).
-
15)
-
9. Chen, Z., Fu, Y., Mi, C.C.: ‘State of charge estimation of lithium-ion batteries in electric drive vehicles using extended Kalman filtering’, IEEE Trans. Veh. Technol., 2013, 62, (3), pp. 1020–1030 (doi: 10.1109/TVT.2012.2235474).
-
16)
-
14. Liu, Y.H., Hsieh, C.H., Luo, Y.F.: ‘Search for an optimal five-step charging pattern for li-ion batteries using consecutive orthogonal arrays’, IEEE Trans. Energy Convers., 2011, 26, (2), pp. 654–661 (doi: 10.1109/TEC.2010.2103077).
-
17)
-
7. Gholizade-Narm, H., Charkhgard, M.: ‘Lithium-ion battery state of charge estimation based on square-root unscented Kalman filter’, IET Power Electron., 2013, 6, (9), pp. 1833–1841 (doi: 10.1049/iet-pel.2012.0706).
-
18)
-
13. Jiayuan, W., Zechang, S., Xuezhe, W.: ‘Performance and characteristic research in LiFePO4 battery for electric vehicle applications’. Fifth IEEE Vehicle Power and Propulsion Conf., 2009, pp. 1657–1661.
-
19)
-
31. Kutkut, N.H.: ‘Non-dissipative current diverter using a centralized multi-winding transformer’. 28th Annual IEEE Power Electronics Specialists Conf., 1997, pp. 648–654.
-
20)
-
W. Ying ,
G. Hongwei
.
Optimization of fuel cell and supercapacitor for fuel-cell electric vehicles.
IEEE Trans. Veh. Technol.
,
1748 -
1755
-
21)
-
1. Micea, M.V., Ungurean, L., Cârstoiu, G.N., Groza, V.: ‘Online state-of-health assessment for battery management systems’, IEEE Trans. Instrum. Meas., 2011, 60, (6), pp. 1997–2006 (doi: 10.1109/TIM.2011.2115630).
-
22)
-
20. Kutkut, N.H., Divan, D.M.: ‘Dynamic equalization techniques for series battery stacks’. Proc. IEEE Telecommunication Energy Conf., 1996, pp. 514–521.
-
23)
-
21. Song, H.-S., Kim, T.-H., Jeong, J.-B., et al: ‘Verification of battery system model for environmentally friendly vehicles using a battery hardware-in-the-loop simulation’, IET Power Electron., 2013, 6, (2), pp. 417–424 (doi: 10.1049/iet-pel.2012.0293).
-
24)
-
12. Hua, C.-C., Syue, Z.-W.: ‘Charge and discharge characteristics of lead-acid battery and LiFePO4 battery’. 2010 Int. Power Electronics Conf., 2010, pp. 1478–1483.
-
25)
-
30. Kutkut, N.H., Divan, D.M., Donald, W.: ‘Charge equalization for series connected battery strings’, IEEE Trans. Ind. Appl., 1995, 31, (3), pp. 562–568 (doi: 10.1109/28.382117).
-
26)
-
33. Elgammal, A.A.A., Sharaf, A.M.: ‘Self-regulating particle swarm optimized controller for (photovoltaic-fuel cell) battery charging of hybrid electric vehicles’, IET Electr. Syst. Transp., 2012, 2, (2), pp. 77–89 (doi: 10.1049/iet-est.2011.0021).
-
27)
-
3. Andrew, M.G., Weinlein, C.E.: ‘The lead-acid battery – demonstrating the systems design approach to a practical electric vehicle power source’, IEEE Trans. Veh. Technol., 1983, VT-32, (1), pp. 21–25 (doi: 10.1109/T-VT.1983.23940).
-
28)
-
23. Lu, X., Qian, W., Peng, F.Z.: ‘Modularized buck-boost + Cuk converter for high voltage series connected battery cells’. 2012 27th Annual IEEE Applied Power Electronics Conf. and Exposition, 2012, pp. 2272–2278.
-
29)
-
24. Hou, C.-H., Yen, C.-T., Wu, T.-H., Moo, C.-S.: ‘A battery power bank of serial battery power modules with buck-boost converters’. Tenth IEEE Int. Conf. on Power Electronics and Drive Systems, 2013, pp. 211–216.
-
30)
-
19. Park, H.-S., Kim, C.-H., Park, K.-B., Moon, G.-W., Lee, J.-H.: ‘Design of a charge equalizer based on battery modularization’, IEEE Trans. Veh. Technol., 2009, 58, (7), pp. 3216–3223 (doi: 10.1109/TVT.2009.2015331).
-
31)
-
18. Steiner, M., Scholten, J.: ‘Energy storage on board of DC fed railway vehicles’. Proc. 35th Annual lEEE Power Electron. Spec. Conf., Aachen, Germany, 2004, pp. 666–671.
-
32)
-
2. Dogger, J.D., Roossien, B., Nieuwenhout, F.D.J.: ‘Characterization of Li-ion batteries for intelligent management of distributed grid-connected storage’, IEEE Trans. Energy Convers., 2011, 26, (1), pp. 256–263 (doi: 10.1109/TEC.2009.2032579).
-
33)
-
26. Shu, Z., Zhu, H., He, X., Ding, N., Jing, Y.: ‘One-inductor-based auxiliary circuit for dc-link capacitor voltage equalisation of diode-clamped multilevel converter’, IET Power Electron., 2013, 6, (7), pp. 1339–1349 (doi: 10.1049/iet-pel.2012.0242).
-
34)
-
15. Lin, F.-J., Huang, M.-S., Hung, Y.-C., Kuan, C.-H., Wang, S.-L., Lee, Y.-D.: ‘Takagi–Sugeno–Kang type probabilistic fuzzy neural network control for grid-connected LiFePO4 battery storage system’, IET Power Electron., 2013, 6, (6), pp. 1029–1040 (doi: 10.1049/iet-pel.2012.0327).
-
35)
-
H.S. Park ,
C.E. Kim ,
C.H. Kim ,
G.W. Moon ,
J.H. Lee
.
A modularized charge equalizer for an HEV lithium-ion battery string.
IEEE Trans. Ind. Electron.
,
5 ,
1464 -
1476
-
36)
-
32. Hsieh, Y.C., Wu, J.L., Chen, X.H.: ‘Class-E-based charge-equalization circuit for battery cells’, IET Power Electron., 2012, 5, (7), pp. 978–983 (doi: 10.1049/iet-pel.2012.0073).
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