Patent ID: 9742221
Date: 2017-08-22
CPC Classifications: H02J,H04B

Claim:
1. A power transmission device that wirelessly supplies power to a power reception device, the power transmission device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the power transmission device to perform operations comprising: a determining, when the power transmission device has been supplying power to a first power reception device and receives a predetermined request from a second power reception device, determine whether a power supply destination is to be changed from the first power reception device to the second power reception device, based on a battery residual capacity of the second power reception device; a controlling, when the determining determines the power supply destination is to be changed from the first power reception device to the second power reception device, the power transmission device to stop power supply to the first power reception device and to start power supply to the second power reception device; and wherein, when the determining determines that the power supply destination is not to be changed from the first power reception device to the second power reception device, the power transmission device transmits to the second power reception device a refusal notification indicating that the power transmission device will not be supplying power to the second power reception device.