Patent ID: 9490652
Filing Date: 2016-11-08
CPC Classification: H02J

Claim Text:
1. A wireless charger including an auxiliary power supply, the wireless charger comprising: a power input unit which is connected to an external power supply; a wireless power transmission unit which wirelessly transmits electrical power to an electronic device through a magnetic field; and an auxiliary power unit which charges a battery provided therein with electrical power supplied from the power input unit, or charges the battery and, at the same time, provides the electrical power to the wireless power transmission unit, and provides the electrical power of the battery provided therein to the wireless power transmission unit when the power supply from the power input unit is stopped, wherein the auxiliary power unit comprises: the battery; a charge/discharge module which charges the battery with the electrical power supplied from the power input unit and outputs the electrical power stored in the battery when the power supply from the power input unit is stopped; and a boost converter which boosts the voltage of the electrical power output from the charge/discharge module and provides the boosted voltage to the wireless power transmission unit.