PROBLEM TO BE SOLVED: To more surely estimate charging volume differences in a power storage element.SOLUTION: A state estimation device comprises a control part 60 that estimates charging volume differences at least two secondary batteries 31 of a plurality of secondary batteries 31. At a reference time T0 during a constant current charging for the plurality of secondary batteries 31, the secondary battery 31 in which a voltage is relatively low in two secondary batteries 31 is set to a secondary battery 31D. When the secondary battery 31 in which the voltage is relatively high is set to a secondary battery 31A, The control part 60 executes: a specific voltage setting processing for setting the voltage of the secondary battery 31D at the reference time T0 to a specific voltage V0; a time acquisition processing for acquiring a time that the voltage of the secondary battery 31A becomes the specific voltage V0; and a charging volume differences estimation processing for estimating the charging volume differences of at least two secondary batteries 31A and 31D on the basis of the reference time T0, the time acquired in the time acquisition processing, and the current flowing to the plurality of secondary batteries 31 at the constant current charging.SELECTED DRAWING: Figure 4

    【課題】蓄電素子の充電量差をより確実に推定すること【解決手段】複数の二次電池31のうち少なくとも2つの二次電池31の充電量差を推定する制御部60を備え、複数の二次電池31に対する定電流充電中の基準時刻T0において、2つの二次電池31のうち相対的に電圧が低い二次電池31を二次電池31Dとし、相対的に電圧が高い二次電池31を二次電池31Aとした場合において、制御部60は、基準時刻T0における二次電池31Dの電圧を特定電圧V0として設定する特定電圧設定処理と、二次電池31Aの電圧が特定電圧V0となる時刻を取得する時刻取得処理と、基準時刻T0と、時刻取得処理で取得した時刻と、定電流充電時に複数の二次電池31に流れる電流と、に基づいて、少なくとも2つの二次電池31A,31Dの充電量差を推定する充電量差推定処理と、を実行する構成とした。【選択図】図4


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    Titel :

    STATE ESTIMATION DEVICE, POWER STORAGE ELEMENT MODULE, VEHICLE, AND STATE ESTIMATION METHOD


    Weitere Titelangaben:

    状態推定装置、蓄電素子モジュール、車両、及び状態推定方法


    Beteiligte:
    SEJIMA KENICHI (Autor:in)

    Erscheinungsdatum :

    03.08.2017


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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