SLUAB09 October 2025 AMC0386-Q1 , TPS61170 , TPS61170-Q1 , TPSI2140-Q1
The OBC must meet a number of insulation monitoring requirements to maintain safety during V2L and V2H operations. The most recent regulation addressing these needs is GB/T?18487.4?2025, Electric Vehicle Conductive Charging and Discharging System – Part?4: Discharging Requirements for Electric Vehicles. Published on 25th?April?2025, the standard is scheduled for implementation on 1st?November?2025. The standard expands the safety?related insulation monitoring rules, previously limited to charging (GB/T?18487.1/2), and now covers vehicle?to?load (V2L), vehicle?to?home (V2H), and vehicle?to?grid (V2X) discharging operations. The following list is a concise debrief of the insulation monitoring requirements on an OBC system:
In addition to the above-mentioned requirements, there are requirements for the DC side IMD that are not explicitly mentioned in the AC side IMD, and requirements that depend on the OEMs of different regions worldwide.
Interaction with other safety devices: Interaction with an RCD circuit in the AC side or interaction with the IMD circuit in a battery management system (BMS) or chargers.