Patent ID: 9461500
Filing Date: 2016-10-04
CPC Classification: H02J

Claim Text:
1. A wireless charging receiving device, comprising: a body; a metal housing coupled to the body to form an accommodating space, wherein the metal housing comprises an aperture and at least one slit, and the slit interconnects the aperture and an edge of the metal housing; a receiving coil disposed between the metal housing and the body, wherein the receiving coil defines a through hole by a looped configuration, wherein the through hole overlaps at least part of the aperture of the metal housing; a power storage device disposed within the accommodating space and electrically connected to the receiving coil, wherein electromagnetic waves are capable of passing through the aperture of the metal housing and magnetically coupling to the receiving coil, such that the receiving coil transfers an energy of the electromagnetic waves to the power storage device; and a tunable capacitor electrically coupled to the receiving coil to synchronously adjust a resonant frequency of the receiving coil to match an emitting frequency of a wireless charging transmitting device.