Adaptive state-of-charge indication system for a Li-ion battery-powered devices

V. Pop, D. Danilov, H.J. Bergveld, P.H.L. Notten, P.P.L. Regtien

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)
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Samenvatting

Accurate State-of-Charge (SoC) and remammg run-time indication for portable devices is important for the user convenience and to prolong the lifetime of batteries. So far, no one succeeded in coming up with a SoC system that is accurate enough under all realistic user conditions. An algorithm that combines adaptive system with Electro-Motive-Force (EMF) measurements during equilibrium and current measurement and integration during charge and discharge states has been developed and implemented in a real-time SoC evaluation system. During the discharge state, apart from simple coulomb counting, also the effect of the overpotential is considered. Mathematical models describing the EMF and the overpotential functions for a Li-ion battery have been developed. The overpotential model includes a variety of parameters that are changing during cycling of the battery. Adaptive methods for the battery maximum capacity and for the overpotential model parameters used in the system with the aging effects are presented in this paper. The final aim is to predict the SoC and the remaining run-time of aLi-ion battery within 1% inaccuracy under all realistic user conditions. As mobile phones are most challenging with respect to a wide variety of load currents and a wide temperature range, the developed system will focus on this application. The achieved results show the effectiveness of the novel approach for improving the SoC indication accuracy and the system capability to cope with the aging effects.
Originele taal-2Engels
TitelProceedings of the 22nd International Battery, Hybrid and Fuel-cell Electric Vehicle Symposium (EVS22), 23-28 October, 2006, Yokohama, Japan
Pagina's865-876
StatusGepubliceerd - 2006
Evenement22nd International Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exposition (EVS 2006) - Pacifico Yokohama, Yokohama, Japan
Duur: 23 okt 200628 okt 2006
Congresnummer: 22
http://www.evs22.org/

Congres

Congres22nd International Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exposition (EVS 2006)
Verkorte titelEVS 2006
LandJapan
StadYokohama
Periode23/10/0628/10/06
Ander22nd Int. Battery, Hybrid and Fuel-cell Electric Vehicle Symposium (EVS22)
Internet adres

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