WIRELESS CHARGING DEVICE AND SYSTEM WITH SUPPRESSED ELECTROMAGNETIC WAVE DIVERGENCE AND ENHANCED CHARGING EFFICIENCY

摘要

A wireless charging device (3, 3a, 3b, 3c, 3d) includes a casing (30), a transmitter coil assembly (31, 31a, 31b) and a shielding structure (34). The casing (30) includes a main body (301) with an accommodation space (303) and an entrance (304). At least one power-receiving device (4, 4') is accommodated within the accommodation space (303). The transmitter coil assembly (31, 31a, 31b) is disposed within the main body (301), and emits an electromagnetic wave with at least one specified frequency for wirelessly charging the at least one power-receiving device (4, 4'). Each transmitter coil assembly (31, 31a, 31b) includes at least one antenna (312, 313) for receiving an AC signal so as to emit the electromagnetic wave. The shielding structure (34) is attached on an outer surface of the main body (301) or disposed within the main body (301). The shielding structure (34) at least shields the antenna (312, 313) of the transmitter coil assembly (31, 31a, 31b) so as to block divergence of the electromagnetic wave.