PROBLEM TO BE SOLVED: To detect the contact welding of a contactor by a simple structure, concerning an electric leakage detection circuit of a vehicle.SOLUTION: Contactors 4 and 19 are interposed on charging lines 1 and 16 connecting charging connectors 3 and 17 to which a power line from an external power supply on the outside of a vehicle is connected, and a battery 2. Grounding lines 5 and 20 are branched off from between the charging connectors 3 and 17 and the contactors 4 and 19 on the charging lines 1 and 16, and connected to a ground 6. Capacitors 7 and 21 are interposed on the grounding line 5 and 20. Furthermore, alternating current signals are applied on the charging lines 1 and 16 by an electric leakage sensor 9, and the welding of the contactors 4 and 19 is determined on the basis of response signals to the alternating current signals.
【課題】車両の漏電検出回路に関し、簡素な構成でコンタクタの接点溶着を検出する。【解決手段】車両外部の外部電源からの電力線が接続される充電コネクタ3,17とバッテリ2とを結ぶ充電ライン1,16上に、コンタクタ4,19を介装する。また、充電ライン1,16上における充電コネクタ3,17とコンタクタ4,19との間から接地ライン5,20を分岐させ、グラウンド6に接続する。接地ライン5,20上には、コンデンサ7,21を介装する。さらに、漏電センサ9で充電ライン1,16に交流信号を印加し、交流信号に対する応答信号に基づいて、コンタクタ4,19の溶着を判定する。【選択図】図2
ELECTRIC LEAKAGE DETECTION CIRCUIT OF VEHICLE
車両の漏電検出回路
2015-08-24
Patent
Electronic Resource
Japanese
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