An electrical fault detection device (10) installed in a vehicle ensures detection accuracy while avoiding the use of expensive components and suppressing total costs. The vehicle includes a power storage unit (20) that is installed as insulated from a chassis ground of the vehicle, a first switch (MRp) that is inserted into a plus line (Lp), and a second switch (MRm) that is inserted into a minus line (Lm). The electrical fault detection device (10) installed in the vehicle includes a coupling capacitor (Cc), an AC output unit (13a), a first voltage measurement unit (13b), a first determination unit (13c), a voltage-dividing circuit (11), a second voltage measurement unit (12), and a second determination unit (13d). The voltage-dividing circuit (11) connects between the plus line (Lp) that is between the first switch (MRp) and one end of a load (2), and the minus line (Lm) that is between the second switch (MRm) and the other end of the load (2).
为了在搭载于车辆的漏电检测装置(10)中在确保检测精度的同时不使用昂贵的部件来抑制总成本,在搭载于具备以与车辆的底盘地线绝缘的状态搭载的蓄电部(20)、被插入到正极配线(Lp)的第一开关(MRp)、以及被插入到负极配线(Lm)的第二开关(MRm)的车辆的漏电检测装置(10)中具备耦合电容器(Cc)、交流输出部(13a)、第一电压测定部(13b)、第一判定部(13c)、分压电路(11)、第二电压测定部(12)以及第二判定部(13d)。分压电路(11)连接在第一开关(MRp)与负载(2)的一端之间的正极配线(Lp)同第二开关(MRm)与负载(2)的另一端之间的负极配线(Lm)之间。
ELECTRICAL FAULT DETECTION DEVICE AND VEHICLE POWER SUPPLY SYSTEM
漏电检测装置、车辆用电源系统
2021-09-28
Patent
Elektronische Ressource
Chinesisch
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