POWER RECEPTION DEVICE, POWER TRANSMISSION DEVICE, POWER SUPPLY SYSTEM, AND POWER RECEPTION METHOD

A power reception device includes a communication circuit for transmitting an information packet that includes a status parameter indicating the status of the battery and a request parameter indicating the amount of transmission power and a transmission time; a power reception circuit for receiving power and charging the battery; and a switching circuit for switching between the communication circuit and the power reception circuit, to connect a power reception coil to one of the communication circuit and the power reception circuit. The communication circuit includes determination circuit for determining the voltage of the battery; and a power reception control circuit for setting values corresponding to the voltage of the battery as the status parameter and the request parameter when the voltage of the battery is equal to or higher than a voltage threshold, and for setting fixed values as the parameters when the voltage of the battery is lower than the threshold.