V2X Operation of Integrated Single-Phase Bidirectional Electric Vehicle Charger

The higher cost of electric vehicles (EVs) compared to combustion vehicles is a roadblock to the adoption of EVs. As the higher cost is mainly due to the battery pack, it cannot be significantly reduced, however it can be made a better value if the EV can provide additional functionalities. Vehicle-to-everything (V2X) operation can allow the EV to operate as a mobile power source, eliminating the need for separate backup/portable generators and standalone power inverters. This paper presents the V2X operation of an integrated single phase charger based on the dual-inverter drive. As this integrated charger re-uses the existing high-power traction inverter and motor, this saves additional costs over previously presented V2X capable discrete on-board chargers, while offering a higher power output. This paper describes the principle of operation and control, along with experimental results using a full-scale 110 kWpk dual-inverter drive consisting of a liquid cooled EV motor. Real world functionality is demonstrated by powering resistive loads and non-linear loads, as well as a jigsaw power tool. Finally, efficiency measurments are provided, with a peak efficiency of 96%.