PROBLEM TO BE SOLVED: To provide a vehicular power supply system capable of securing the reliability of the system and further improving the fuel economy of a vehicle.SOLUTION: A power supply system includes: first and second batteries parallel connected to an alternator and an auxiliary-equipment load; a relay disposed between the auxiliary-equipment load and the first battery; a DC-DC converter disposed between the auxiliary-equipment load and the second battery; and a control device. Further, the control device performs: closing the relay, controlling a voltage generated by the alternator so that the charge ratio of the first battery does not decrease to or lower than a third threshold being lower than the first threshold, and controlling the DC-DC converter so as to charge the second battery, in the case of a charge ratio of the first battery being equal to or higher than the first threshold and that of the second battery being lower than a second threshold; and opening the relay, setting a voltage generated by the alternator at a second voltage being lower than a first voltage, and controlling the DC-DC converter so as to discharge the second battery, in the case of a charge ratio of the first battery being equal to or higher than the first threshold and that of the second battery being equal to or higher than the second threshold.SELECTED DRAWING: Figure 2

    【課題】システムの信頼性を確保し且つ車両燃費の更なる向上を図ることが可能な車両用電源システムを提供。【解決手段】オルタネータ及び補機負荷と並列接続される第1及び第2蓄電装置と、補機負荷と第1蓄電装置との間に設けられるリレーと、補機負荷と第2蓄電装置との間に設けられるDC−DCコンバータと、第1蓄電装置の充電率が第1閾値以上且つ第2蓄電装置の充電率が第2閾値より低い時リレーを閉成し、オルタネータの発電電圧を第1蓄電装置の充電率が第1閾値より低い第3閾値以下に低下しないように制御すると共に、第2蓄電装置が充電されるように、DC−DCコンバータを制御し、第1蓄電装置の充電率が第1閾値以上且つ第2蓄電装置の充電率が第2閾値以上の時リレーを開放し、オルタネータの発電電圧を第1電圧より低い第2電圧に設定すると共に、第2蓄電装置を放電させるように、DC−DCコンバータを制御する。【選択図】図2


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    Titel :

    VEHICULAR POWER SUPPLY SYSTEM


    Weitere Titelangaben:

    車両用電源システム


    Beteiligte:
    SHONO SHOICHI (Autor:in)

    Erscheinungsdatum :

    2017-06-22


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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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