Uncertainty analysis in a real-time state-of-charge evaluation system for lithium-ion batteries

V. Pop, P.P.L. Regtien, H.J. Bergveld, P.H.L. Notten, J.H.G. Op het Veld

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    Abstract

    Lithium-ion (Li-ion) is the most commonly used battery chemistry in portable applications nowadays. Accurate State-of-Charge (SoC) and remaining run-time (tr) calculation for portable devices is important for the user convenience and to prolong the lifetime of batteries. A new SoC algorithm for Li-ion batteries that combines adaptivity with direct measurement and book-keeping systems has been developed and implemented in a real-time evaluation system. In this paper the error sources in the real-time SoC evaluation system with possible calibration solutions are described. The goal of the SoC system is to predict the remaining run-time of a Li-ion battery with an uncertainty of 1 minute or better under all realistic user conditions, including a wide variety of load currents and a wide temperature range.

    Original languageEnglish
    Title of host publication18th IMEKO World Congress 2006
    Subtitle of host publicationMetrology for a Sustainable Development
    PublisherCurran Associates Inc.
    Pages876-881
    Number of pages6
    Volume2
    ISBN (Print)9781622766468
    Publication statusPublished - 1 Dec 2006
    Event18th IMEKO World Congress 2006: Metrology for a Sustainable Development - Rio de Janeiro, Brazil
    Duration: 17 Sep 200622 Sep 2006
    Conference number: 18

    Conference

    Conference18th IMEKO World Congress 2006
    CountryBrazil
    CityRio de Janeiro
    Period17/09/0622/09/06

    Keywords

    • Error
    • Li-ion batteries
    • Portable energy
    • State-of-Charge

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