Single-/Three-Phase Bidirectional EV On-Board Charger Featuring Full Power/Voltage Range and Cost-Effective Implementation

On-board chargers (OBC) are required to operate under a wide range of operating conditions in terms of input voltage, phase number, and output battery voltage. Accordingly, achieving a high-performance, efficient and cost-effective implementation poses special challenges. In this paper, a novel OBC architecture is considered which is able to operate both in three-phase and single-phase configuration with full output power range without requiring additional power components or degrading performance. The proposed solution provides a universal-charging single-power-processing block that features a high power density and cost-effective implementation. In this paper, a bidirectional 11-kW 800-V battery voltage prototype of the system is designed and constructed for a 400V (line-to-line) mains supply.