PROBLEM TO BE SOLVED: To provide a new determination criterion about ON-fixed fault of a main relay.SOLUTION: A ground fault detector which is connected to a non-grounded high-voltage battery whose connection state with a load having a terminal resistance with the ground can be switched by a main relay includes: a switch group which switches between a positive pole measurement passage including an insulation resistance between a positive pole of the high-voltage battery and the ground and a negative pole measurement passage including an insulation resistance between a negative pole of the high-voltage battery and the ground; and a control part which compares on time voltage to be charge voltage of a detection capacitor when the main relay is switch controlled to on with off time voltage to be charge voltage of the detection capacitor when the main relay is switch controlled to off, for the positive pole measurement passage and the negative pole measurement passage respectively, and determines that ON-fixed fault has occurred to the main relay in the case that in either of the measurement passages, the off time voltage is larger than the on time voltage.SELECTED DRAWING: Figure 1
【課題】メインリレーのオン固着の新たな判定基準を提供する。【解決手段】接地との間に終端抵抗を有する負荷との接続状態がメインリレーで切り換えられる、非接地の高電圧バッテリと接続する地絡検出装置であって、高電圧バッテリの正極と接地との絶縁抵抗を含んだ正極測定経路と、高電圧バッテリの負極と接地との絶縁抵抗とを含んだ負極測定経路と、を切り換えるスイッチ群と、正極測定経路および負極測定経路のそれぞれについて、メインリレーがオンに切換制御されているときの、検出用コンデンサの充電電圧であるオン時電圧と、メインリレーがオフに切換制御されているときの、検出用コンデンサの充電電圧であるオフ時電圧とを比較し、いずれかの測定経路において、オフ時電圧がオン時電圧よりも大きい場合に、メインリレーでオン固着が発生したと判定する制御部とを備える。【選択図】図1
GROUND FAULT DETECTOR AND POWER SOURCE SYSTEM
地絡検出装置、電源システム
2018-08-16
Patent
Elektronische Ressource
Japanisch
IPC: | 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 / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / 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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