To reduce the possibility of erroneous diagnosis of whether there is a failure or not in a second switch circuit which electrically connects and disconnects a second power supply path connecting an auxiliary power supply with a load.SOLUTION: A first switch circuit 26 electrically connects and disconnects a first power supply path L1 connecting a first auxiliary power supply 22 and a load 5. A second switch circuit 27 electrically connects and disconnects a second power supply path L2 connecting a second auxiliary power supply 3 having a capacity smaller than that of the first auxiliary power supply 22 and the load 5. A diagnosis unit 211 diagnoses the presence or absence of an open failure of the second switch circuit 27 with a voltage exceeding a determination threshold value for determining the presence/absence of an open failure of the second switch circuit 27 being applied from the second auxiliary power supply 3 to a point of connection between the second switch circuit 27 and the second auxiliary power supply 3.SELECTED DRAWING: Figure 1

    【課題】補助電源と負荷とを繋ぐ第2給電路を導通及び遮断する第2スイッチ回路の故障の有無を誤診断する可能性を低減すること。【解決手段】第1スイッチ回路26は、第1補助電源22と負荷5とを繋ぐ第1給電路L1を導通及び遮断する。第2スイッチ回路27は、第1補助電源22よりも小容量の第2補助電源3と負荷5とを繋ぐ第2給電路L2を導通及び遮断する。第2スイッチ回路27と第2補助電源3との接続点に、第2スイッチ回路27のオープン故障の有無を判定するための判定閾値を超える電圧が第2補助電源3から印加されている状態で、診断部211は第2スイッチ回路27のオープン故障の有無を診断する。【選択図】図1


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    Title :

    BACKUP POWER SUPPLY SYSTEM, FAILURE DIAGNOSIS METHOD FOR BACKUP POWER SUPPLY SYSTEM, AND PROGRAM


    Additional title:

    バックアップ電源システム、バックアップ電源システムの故障診断方法、及びプログラム


    Contributors:

    Publication date :

    2022-05-17


    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 / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



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