| 摘要 |
A wireless power transmission device for wirelessly transmitting power to a wireless power reception device, according to one embodiment of the present invention, comprises: a first transmission coil for transmitting power to the wireless power reception device through a magnetic field; and a second transmission coil for transmitting power to the wireless power reception device through a magnetic field and arranged on the inner side of the first transmission coil, wherein the wireless power transmission device transmits power to the wireless power reception device through one coil between the first transmission coil and the second transmission coil on the basis of a coupling state between the wireless power transmission device and the wireless power reception device. |
