Revista Eletrônica de Potência (Brazilian Journal of Power Electronics)

Keywords: Battery Charger, Impedance Measurement, Lead-Acid Battery, Stage-of-Health

Abstract

This paper reports a theoretical and experimental study on a proposal for a lead–acid battery charger applied in UPS, which has an integrated on-line test system to determine the state-of-health (SoH) of the batteries. The charger control structure is designed to ensure an appropriate charge for every battery in the pack. The battery evaluation system is based on historical analysis of the periodic measurements, such as internal impedance, DC voltage and operation temperature, performed for each battery. The periodic monitoring of these parameters provided by the integration of systems eliminates the disadvantages of online tests and thus allows the user to analyze the batteries adequately. The structure was experimentally verified on a prototype, where the battery SoH diagnosis system was integrated with a 1.5 kW battery charger. The system was designed for a bank of sixteen batteries associated in series.

[1] “IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead- Acid (VRLA) Batteries for Stationary Applications,” IEEE Std 1188-2005 (Revision of IEEE Std 1188-1996), pp. 0_1-34, 2006. [2] J. M. Hawkins and L. O. Barling, “Some aspects of battery impedance characteristics,” in Proc. of INTELEC ’95, pp. 271-276, 1995. [3] J. M. Hawkins, “Some field experience with battery impedance measurement as a useful maintenance tool,” in Proc. of INTELEC ’94, pp. 263-269, 1994. [3] J. M. Hawkins, “Some field experience with battery impedance measurement as a useful maintenance tool,” in Proc. of INTELEC ’94, pp. 263-269, 1994. [4] I. Damlund, “Analysis and interpretation of ACmeasurements on batteries used to assess state-of-health and capacity-condition,” in Proc. of INTELEC ’95, pp. 828-833, 1995. [5] M. Coleman, et al., “State-of-Charge Determination From EMF Voltage Estimation: Using Impedance, Terminal Voltage, and Current for Lead-Acid and Lithium-Ion Batteries,” IEEE Transactions on Industrial Electronics, vol. 54, pp. 2550-2557, 2007. [6] G. Lodi, et al., “The use of impedance measurement as an effective method of validating the integrity of VRLA battery production,” in Proc. of INTELEC 2004, pp. 605-610, 2004. [7] F. J. Vaccaro and P. Casson, “Internal Resistance: Harbinger of Capacity Loss in Starved Electrolyte Sealed Lead Acid Batteries,” in Proc. of INTELEC ’87, pp. 128-131, 1987. [8] M. S. Sudhan, et al., “Use of AC impedance/conductance and DC resistance for determining the reliability of VRLA battery systems,” in Proc. of INTELEC ’93, pp. 384-391 vol.2, 1993. [9] G. J. Markle, “AC impedance testing for valve regulated cells,” in Proc. of INTELEC ’92, pp. 212-217, 1992. [10] M. Fatima, et al., “Failure detection of stationary leadacid batteries in service in various regions of Brazil,” in Proc. of INTELEC 2002, pp. 204-213, 2002. [11] A. R. Waters, et al., “Monitoring the state of health of VRLA batteries through ohmic measurements,” in Proc. of INTELEC 97, pp. 675-680, 1997. [12] M. Kiel, et al., “Validation of single frequency Z measurement for standby battery state of health determination,” in Proc. of INTELEC 2008, pp. 1-7, 2008. [13] K. Kutluay, et al., “A new online state-of-charge estimation and monitoring system for sealed lead-acid batteries in Telecommunication power supplies,” IEEE Transactions on Industrial Electronics, vol. 52, pp. 1315-1327, 2005. [14] M. Coleman, et al., “An Improved Battery Characterization Method Using a Two-Pulse Load Test,” IEEE Transactions on Energy Conversion, vol. 23, pp. 708-713, 2008. [15] M. Cugnet, et al., “On Lead-Acid-Battery Resistance and Cranking-Capability Estimation,” IEEE Transactions on Industrial Electronics, vol. 57, pp. 909-917, 2010. [16] C. R. Gould, et al., “New Battery Model and State-of- Health Determination Through Subspace Parameter Estimation and State-Observer Techniques,” IEEE Transactions on Vehicular Technology, vol. 58, pp. 3905-3916, 2009. [17] D. Dinh Vinh, et al., “Impedance Observer for a Li-Ion Battery Using Kalman Filter,” IEEE Transactions on Vehicular Technology, vol. 58, pp. 3930-3937, 2009. [18] M. Charkhgard and M. Farrokhi, “State-of-Charge Estimation for Lithium-Ion Batteries Using Neural Networks and EKF,” IEEE Transactions on Industrial Electronics, vol. 57, pp. 4178-4187, 2010. [19] C. Ying-Chun, “High-Efficiency ZCS Buck Converter for Rechargeable Batteries,” IEEE Transactions on Industrial Electronics, vol. 57, pp. 2463-2472, 2010. [20] E. Sanchis, et al., “High-Power Battery Discharge Regulator for Space Applications,” IEEE Transactions on Industrial Electronics, vol. 57, pp. 3935-3943, 2010. [21] M. J. Hlavac, et al., “Field and laboratory studies to assess the state of health of valve-regulated lead acid and other battery technologies using conductance testing,” in Proc. of INTELEC ’93, pp. 375-383 vol.2, 1993. [22] W. H. Edwards, et al., “Conductance measurements in relation to battery state of charge,” in Proc. of INTELEC ’99, p. 7 pp, 1999.