Abstract: The present invention provides a battery monitoring method, which is performed by a battery monitoring device, including: measuring a first voltage drop across both ends of a first shunt resistor of a bus bar electrically connected to a battery and a second voltage drop across both ends of a second shunt resistor, which is in parallel or serial connection with the first shunt resistor; calculating a first current and a second current flowing, respectively, through the first shunt resistor and the second shunt resistor using a first voltage drop value and a second voltage drop value; and determining a state of the battery using a difference between a first current value and a second current value. According to the present invention, it is possible to increase the reliability of monitoring information related to the battery's state by utilizing current values that have undergone linearity compensation and temperature compensation.

Abstract: A reception device for receiving wireless power may include: a power reception circuit configured to wirelessly receive power from a transmission device, rectify the received power, and output the rectified power; a charger configured to process the rectified power received from the power reception circuit and charge a battery of the reception device or output the rectified power to a system of the reception device; and a control circuit configured to, when an event for changing an input current limit of the charger is detected, gradually change the input current limit of the charger by stepping up or stepping down the input current limit to one or more intermediary values until the input current limit reaches a predetermined value.

Abstract: A reception device for receiving wireless power may include: a power reception circuit configured to wirelessly receive power from a transmission device, rectify the received power, and output the rectified power; a charger configured to process the rectified power received from the power reception circuit and charge a battery of the reception device or output the rectified power to a system of the reception device; and a control circuit configured to, when an event for changing an input current limit of the charger is detected, gradually change the input current limit of the charger by stepping up or stepping down the input current limit to one or more intermediary values until the input current limit reaches a predetermined value.