State-of-Charge Indication in Portable Applications

V. Pop, H.J. Bergveld, P.H.L. Notten, Paulus P.L. Regtien

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    21 Citations (Scopus)
    165 Downloads (Pure)


    The known methods of state-of-charge (SoC) indication in portable applications are not accurate enough under all practical conditions. The method presented in this paper aims at designing and testing an SoC indication system capable of predicting the remaining capacity of the battery and the remaining run-time with an accuracy of 1 minute or better under all realistic user conditions, including a wide variety of load currents and a wide temperature range. The basis of the proposed algorithm is current measurement and integration during charge and discharge state and voltage measurement during equilibrium state. One of the main problems in designing an accurate SoC indication system is aging of the battery. A simple method of adapting the maximum battery capacity used in the system with the aging effects is presented in this paper. A first set of experimental results shows the effectiveness of our novel approach for improving the accuracy of the SoC indication.
    Original languageEnglish
    Title of host publicationIEEE International Symposium on Industrial Electronics (ISIE 2005)
    Place of PublicationUSA
    PublisherIEEE Industrial Electronics Society
    Number of pages6
    ISBN (Print)0-7803-8738-4
    Publication statusPublished - 15 Nov 2005
    EventIEEE International Symposium on Industrial Electronics 2005 - Dubrovnik, Croatia
    Duration: 20 Jun 200523 Jun 2005


    ConferenceIEEE International Symposium on Industrial Electronics 2005
    Abbreviated titleISIE 2005


    • METIS-229036
    • Battery management systems
    • IR-73684
    • secondary cells
    • Indicators
    • portable instruments
    • EWI-18590
    • Lithium


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