To suppress excessive increase in voltage of an auxiliary machine line even when a surge current is generated in a vehicular power supply system.SOLUTION: A power supply system 10 includes a first battery 11, a second battery 12, a DCDC converter 13, a discharge circuit 23, a charging circuit 24 and a controller 80. The controller 80 starts voltage reduction processing where a first switching element 32 of the discharge circuit 23 is turned on when the voltage of an auxiliary machine power line 17 to which an auxiliary machine 110 is connected becomes higher than a voltage decision value, and executes protection processing where the first switching element 32 is turned off while repeating on/off of a second switching element 42 of the charging circuit 24 when turning the first switching element 32 off after starting the voltage reduction processing.SELECTED DRAWING: Figure 1

    【課題】車両用電源システム内でサージ電流が発生しても、補機電力ラインの電圧が高くなりすぎることを抑制できるようにすること。【解決手段】電源システム10は、第1バッテリ11、第2バッテリ12、DCDCコンバータ13、放電回路23、充電回路24及び制御装置80を備える。制御装置80は、補機110が接続されている補機電力ライン17の電圧が電圧判定値よりも高くなると、放電回路23の第1スイッチング素子32をオンとする電圧低下処理を開始し、電圧低下処理の開始後において第1スイッチング素子32をオフとするときには、充電回路24の第2スイッチング素子42のオン・オフを繰り返しつつ第1スイッチング素子32をオフとする保護処理を実行する。【選択図】図1


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    Title :

    VEHICULAR POWER SUPPLY SYSTEM


    Additional title:

    車両用電源システム


    Contributors:
    KAKEI JUNPEI (author) / SUGITA MIKI (author) / ANDO YUYA (author) / SUZUKI TAKEAKI (author) / ITO KOJI (author) / TSUTSU TAKEKI (author) / LEE HYANG-HUI (author) / MIYAKE TAKASHI (author) / SUZUKI KENSUKE (author) / TAKAMINE DAICHI (author)

    Publication date :

    2021-12-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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