Introduction
Automotive IMD (Insulation Damping) devices are primarily used to monitor the DC insulation resistance (i.e., the DC insulation resistance between the battery and the vehicle chassis) of electric vehicle high-voltage battery systems and the isolation resistance of the on-board charger/inverter. In EV high-voltage battery systems, insulation resistance is typically measured on the DC side, often using DC insulation monitoring devices. In OBC (On-Board Chargers), insulation resistance is typically measured on the AC side, often using AC insulation testing. This article will list some automotive insulation monitoring devices currently available on the market to help you find the right product.
Blue Jay — JY1000-EV and BIM- M1000
Blue Jay offers solutions such as the JY1000-EV and BIM-M1000. Both models provide the same high-voltage insulation monitoring functions, including continuous monitoring of positive and negative rails, adjustable alarm thresholds, and CANbus communication for integration with vehicle control units. They share identical performance specifications, including insulation resistance range and fault response time.
The main difference between the two models lies in their physical design and form factor: the JY1000-EV has a compact module shape suitable for embedded installation, while the BIM-M1000 features a different enclosure style designed for flexible mounting in various EV systems.
Bender- Automotive IMDs
Leading global suppliers such as Bender also offer automotive-ready IMDs like the ISOMETER® series, which implement active insulation measurement techniques for unearthed high-voltage systems across both DC and AC networks.
These devices support continuous insulation resistance measurement up to tens of megaohms, integrated self-test diagnostics, and standardized CAN communication protocols for hybrid and commercial EV platforms, ensuring fault detection even when the high-voltage system is at rest.
Sensata — SIM Series IMDs
Sensata SIM200, SIM100MLP and SIM100MOD Module are compact automotive IMDs capable of monitoring HV systems under dynamic voltage conditions. They measure battery terminal voltages relative to chassis and provide isolation resistance status over CAN.
FUEL2 ELECTRIC- Automotive IMD for Cars and Pickup Trucks
Fuel2Electric’s Automotive IMD is a compact insulation monitoring device for cars and pickup trucks, detecting high-voltage leakage, supporting CAN BUS integration, and automatically cutting off the high-voltage system in case of faults to ensure safety. It supports multiple bus voltages up to 850 VDC and provides real-time warning and protection functions.
Conclusion
In summary, IMDs from Blue Jay, Bender, Sensata, and Fuel2Electric provide continuous insulation monitoring and fault protection for EV high-voltage systems, ensuring safety and reliability. Choosing the right IMD depends on system voltage, vehicle type, and integration needs.
