METHOD FOR ISOLATION MONITORING

摘要

A method for monitoring electrical isolation in an electrical system (1) of a vehicle comprising a high-voltage battery (2) having a positive battery pole (4) and a negative battery pole (5) where the two battery poles are separated from the vehicle chassis (8), where the vehicle comprises a control unit (10) adapted to obtain values that represent the electrical isolation between at least one battery pole and the chassis, comprising the steps of repeatedly obtaining a value that represents the isolation resistance, and saving the value that represents the isolation resistance in a classification table having a plurality of different classification groups. The advantage of the invention is that intermittent faults in a high-voltage system can be detected by using a regular, low speed measurement system.