To calculate the amount of electricity stored in a battery pack even when the amount of electricity stored in cell batteries is difficult to be calculated based on the voltage of the cell batteries.SOLUTION: A battery monitoring device 96 monitors a battery pack 93 having a series connection body of a plurality of cell batteries B. An impedance detection unit 31 of the battery monitoring device 96 detects the impedance Z of the plurality of cell batteries B in a pack electricity storage amount change period in which the amount of electricity Q stored in the battery pack 93 changes with the lapse of time. A cell electricity storage amount calculation unit 33 of the battery monitoring device 96 calculates the amount of electricity Q stored in the cell batteries B based on a change Zdd in the tendency in change Zd of the detected impedance Z. A pack electricity storage amount calculation unit 34 of the battery monitoring device 96 calculates the amount of electricity ΣQ stored in the battery pack 93 based on the calculated amount of electricity Q stored in the cell batteries B.SELECTED DRAWING: Figure 1

    【課題】セル電池の電圧に基づいてセル電池の蓄電量を演算するのが難しい状況下においても、電池パックの蓄電量を演算できるようにする。【解決手段】電池監視装置96は、複数のセル電池Bの直列接続体を有する電池パック93を監視する。電池監視装置96のインピーダンス検出部31は、電池パック93の蓄電量Qが時間経過に伴い変化するパック蓄電量変化時において、複数のセル電池BのインピーダンスZを検出する。電池監視装置96のセル蓄電量演算部33は、検出されたインピーダンスZの変化傾向Zdの変化Zddに基づいて、セル電池Bの蓄電量Qを演算する。電池監視装置96のパック蓄電量演算部34は、演算されたセル電池Bの蓄電量Qに基づいて、電池パック93の蓄電量ΣQを演算する。【選択図】 図1


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    Title :

    BATTERY MONITORING DEVICE AND ELECTRIC VEHICLE HAVING THE SAME MOUNTED THEREON


    Additional title:

    電池監視装置及びそれが搭載された電動車両


    Contributors:

    Publication date :

    2022-11-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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