Inductive power transmission technology for Li-ion battery charger

This paper proposes an inductive power transmission technology applied to Li-ion battery charger, and the feature of the system is no metal connections. The proposed system adopts the magnetic coupling structure for inductive charging to promote the safety and the convenience of charging systems. The EER ferrite cores are used to transfer power, and the capacitors are compensated to primary side and secondary sided for improving transform efficiency. The Li-ion battery charger uses CC-CV charging and has the temperature protection. Finally, the proposed system is implemented to verify the performance on a 3.7V/3000mAh Li-ion battery.