In order to suppress an increase in leakage current that may occur in a coupling capacitor in an electrical fault detection device, in first coupling capacitor (Cc1), a first terminal is connected to a first connection point on a current path of power storage (20) in a state of being insulated from a ground. Second coupling capacitor (Cc2) has a second terminal connected to a second connection point that is on a current path of power storage (20) and is lower in potential than the first connection point, and second coupling capacitor (Cc2) has a first terminal connected to a second terminal of first coupling capacitor (Cc1). AC output unit (13a) applies a predetermined AC voltage via impedance element (Ra) to third connection point (A) between the second terminal of first coupling capacitor (Cc1) and the first terminal of second coupling capacitor (Cc2). Voltage measurement unit (13b) measures a voltage at third connection point (A). Determination unit (13c) determines the presence or absence of an electrical fault on the basis of the voltage measured by voltage measurement unit (13b).
ELECTRICAL FAULT DETECTION DEVICE AND VEHICLE POWER SUPPLY SYSTEM
VORRICHTUNG ZUR ERKENNUNG ELEKTRISCHER FEHLER UND SYSTEM ZUR STROMVERSORGUNG EINES FAHRZEUGS
DISPOSITIF DE DÉTECTION DE DÉFAILLANCE ÉLECTRIQUE ET SYSTÈME D'ALIMENTATION ÉLECTRIQUE DE VÉHICULE
2022-04-13
Patent
Electronic Resource
English
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