As electric vehicles become increasingly common, the need to ensure their safety and reliability is more important than ever. The most serious electrical issue during the EV life is the loss of isolation between HV bus and the chassis of the vehicle. For this reason, the isolation value must be checked at all times. Such a check is performed by the so-called IMD (isolation monitoring device). On trucks, due to the large number of components, these values are not always stable and coherent. Therefore, a novel filtering algorithm is proposed.

• Current state of IMD technology
• Particular IMD challenges
• A new approach to reduce process IMD signals