Research status of bidirectional wireless power transfer technology

With the expansion of the application field of wireless power transmission (WPT) technology, there is an urgent need for bidirectional wireless power transmission technology (BWPT) to realize the energy interaction between wireless charging devices. This paper first analyses the development status of bidirectional capacitive power transfer (BCPT) system and the key issues that need to be addressed, briefly describes the basic operating principle of BWPT system, specifically discuss the main research achievements in terms of typical bidirectional conversion topologies, resonant networks, power control strategies and application scenarios of BWPT system. Finally, prospects for research directions worthy of attention in the future are presented. • State-of-the-art for the bidirectional capacitive power transfer. • Discuss the main research achievements in terms of typical bidirectional conversion topologies, resonant networks, power control strategies, synchronous control strategies and application scenarios in BWPT system. • Prospects for research directions worthy of attention in the future are presented.