A switched-capacitor balancing and characterization method and system

Ivan Jørgensen (Inventor), Pere Llimós Muntal (Inventor), Dennis Larsen (Inventor), Thomas Souvignet (Inventor), Guifré Pausas (Inventor)

    Research output: Patent

    34 Downloads (Pure)

    Abstract

    The present disclosure relates to a switched-capacitor balancing and characterization system for balancing and characterization of a plurality of stacked battery cells. The system comprises at least one capacitor (C1, C2, C3) connectable to a plurality of battery cells (106) via switches (104), configured to connect or disconnect the at least one capacitor to the battery cells, a processing unit (103) configured to control the plurality of switches, and a characterizing unit (109) configured to characterize the AC impedance of the battery cells. The processing unit is configured to control the plurality of switches by applying true random or pseudo-random control signals to the plurality of switches, so that the lengths of the switching periods have a random component. The random component provides a noise signal to each battery cell for determining the AC characteristics without generating electromagnetic interference (EMI).

    Original languageEnglish
    IPCH02J 7/ 00 A I
    Patent numberWO2022136220
    Filing date23/12/2020
    Country/TerritoryInternational Bureau of the World Intellectual Property Organization (WIPO)
    Priority date23/12/2020
    Priority numberEP20200216994
    Publication statusPublished - 30 Jun 2022

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