Channel measurement and modeling of high-voltage power line communication in a hybrid vehicle

Recently, as hybrid vehicles (HVs) and electric vehicles (EVs) have become widespread, a large number of electronic devices have been incorporated into the vehicles. Thus, there is concern regarding the increasing number of lines and connectors. In HVs and EVs, a high-voltage (200 V) battery is employed. We have studied power line communication (PLC) that uses a high-voltage power line to address this concern. This line comprises two parallel wires (a positive (P) wire and a negative (N) wire) and a shielded sheath. Therefore, noise emission and noise immunity, which are significant problems for vehicle PLC using a 12 V power supply line, can be improved by using this high-voltage power line. In this paper, we clarify the transmission channel between a power control unit (PCU) and the high-voltage battery in a commercial HV through experiment and simulation. We also clarify the carrier frequency band that is suitable for high-voltage PLC.