Korea Advanced Institute of Science and Technology (KAIST) have unveiled a next-generation wireless charging system tailored specifically for electric bicycles. The innovation marks a step toward eliminating plug-in hassles and enabling seamless charging for urban riders.
Led by Professor Chun T. Rim of the Department of Electrical Engineering, the research team introduced a power supply floor that wirelessly transfers energy to a charging pad mounted underneath the e-bike. The system delivers up to 400 watts of power through magnetic fields generated by a transmitter coil embedded in the floor.
This technology aims to boost charging convenience for city commuters and logistics workers, who often rely on e-bikes for last-mile deliveries. The team believes that this could accelerate the widespread adoption of e-bikes by improving infrastructure and minimizing charging downtime.
Notably, the wireless system achieved a transmission efficiency rate of over 85%, matching or exceeding many traditional plug-in systems. KAIST’s researchers emphasized that the innovation prioritizes both performance and safety, integrating shielding to minimize electromagnetic interference and ensuring compatibility with existing e-bike systems.
The system is designed for easy implementation in smart cities, where wireless infrastructure can be embedded into parking bays, charging stations, or logistics hubs. With minimal user intervention required, the e-bike begins charging as soon as it is parked over the transmitter pad, offering hands-free functionality.
Professor Rim highlighted the potential for widespread deployment, stating that this wireless charger could support sustainable urban transportation goals by simplifying operations for electric micro-mobility. The team plans further testing and commercialization in collaboration with mobility providers and city planners.
