Patent ID: 8519666

Claim:
A charging system, comprising: a charging pad that includes a power supply coil; and a device housing an internal battery and containing an induction coil that magnetically couples with the power supply coil, wherein power transmitted from the power supply coil to the induction coil is used to charge the internal battery contained in the device, the device housing the internal battery also comprises: a rectifying circuit that rectifies AC power induced in the induction coil; a charging circuit that charges the internal battery contained in the device with output from the rectifying circuit; a shorting circuit that short circuits the terminals of the induction coil; and a control circuit that controls the shorting circuit ON when a charging abnormality is detected, and the control circuit detects a charging abnormality during power transmission from the charging pad power supply coil to the induction coil of the device housing the internal battery, and controls the shorting circuit ON to form a closed circuit that short-circuits the terminals of the induction coil so that the supply of power from the induction coil to the rectifying circuit is cut off.