A power transmitter (101) for a wireless power transfer system comprises a transmitter coil (103) and a driver (201) generates a drive signal) for the transmitter coil (103) employing a repeating time frame with a power transfer time interval and a reduced power time interval during which a power level of the power transfer signal is reduced. A driver (201) generates a drive signal for the transmitter coil (103) to generate the power transfer signal. A communicator (205) receives messages from the power receiver (105) and an adapter (213) adapts a timing property of the reduced power time interval in response to at least a first message received from the power receiver (105). A synchronizer (206) for synchronizing a foreign object detection and the generation of a test signal to occur during the reduced power time interval. The operation may typically be a foreign object detection or communication, and the timing property may e.g. be a duration of the reduced power time interval.

A non-contact power reception apparatus is provided, in which a power reception coil for a charging system and a loop antenna for an electronic settlement system are mounted on a battery pack and a cover case of a portable terminal such that the power reception coil is arranged in the center thereof and the loop antenna is disposed outside the power reception coil, so that a mode of receiving a wireless power signal and a mode of transmitting and receiving data are selectively performed, thereby preventing interference from harmonic components and enabling non-contact charging and electronic settlement using a single portable terminal. A jig for fabricating a core to be mounted to the non-contact power reception apparatus is provided.

This application is directed to a battery protection system including a sense resistor, a comparator, a switching component, and a protection integrated circuit (PIC). The sense resistor is electrically coupled in series with one of a plurality of rechargeable battery cells that are coupled in parallel in a battery. The comparator is coupled to the sense resistor and configured to compare a voltage drop across the sense resistor with a reference voltage to determine whether a subset of the rechargeable battery cells is not charging in the battery. The switching component is coupled to the battery, while the PIC is coupled to the comparator and the switching component. The PIC is configured to control charging and discharging of the battery including disabling the battery from being charged in accordance with a determination that a subset of the rechargeable battery cells is not charging in the battery.

A battery device with a C-rate of 1 C includes a battery cell, a protection chip, and a microcontroller. The protection chip is electrically connected to the battery cell, determines whether to activate the protection mechanism of the battery device according to the state of the battery cell. The microcontroller is electrically connected to the protection chip, detects the RSOC of the battery cell. When an external power supply is electrically coupled to the battery device, and the RSOC of the battery cell is lower than 50%, the microcontroller controls the battery cell to perform a fast charging not over 10 minutes. During the 10 minutes of fast charging, the protection chip activates the protection mechanism, or the microcontroller detects that the battery cell has changed from a CC state to a CV state, the microcontroller stops the fast charging and restores the C-rate of the battery cell to 1 C.

The present disclosure relates to a protection circuit and a battery pack including the same. The protection circuit of the battery pack may include: a discharge control switch positioned on a discharge path of a battery module and configured to block or connect the discharge path; a controller configured to communicate with an external device through a plurality of pack communication terminals and output a control signal of controlling on/off of the discharge control switch; a blocking circuit electrically connected between the plurality of pack communication terminals and the controller and configured to control connection between the plurality of pack communication terminals and the controller; and a blocking control circuit configured to control the blocking circuit to block the connection between the plurality of pack communication terminals and the controller according to the control signal.

An electronic device is provided, belonging to the technical field of power charging. The electronic device includes a wired charging circuit, at least two wireless charging circuits, and a battery. The wired charging circuit and each the wireless charging circuit are connected to the battery. The wired charging circuit is used for receiving input electrical energy by a wired power interface, and charging the battery with the input electrical energy. Each the wireless charging circuit is used for receiving an alternating magnetic field, outputting electrical energy under a driving of the alternating magnetic field, and charging the battery with the output electrical energy. In this situation, charging power during a power charging process is improved to a certain extent.

The present disclosure provides an electronic device. The electronic device includes a battery, a plurality of wireless charging circuits configured to charge the battery, each of the plurality of wireless charging circuits including a wireless receiving circuit; a plurality of wired charging circuits configured to charge the battery based on an output voltage and an output current of a power supply device; and a control circuit configured to control at least one of the plurality of wireless charging circuits and/or at least one of the plurality of wired charging circuits to charge the battery.

In various embodiments, an electronic device may include a battery pack including a charging terminal, a discharging terminal, and at least one battery cell. A first substrate is connected to the charging terminal and a second substrate is connected to the discharging terminal. An external connector is mounted on the first substrate and connected to an external power supply device. A first internal connector is mounted on the first substrate and connected to the charging terminal. A second internal connector is mounted on the second substrate and connected to the discharging terminal. A charging circuit is mounted on the first substrate and configured to receive a first power signal from the power supply device through the external connector, to adjust a current and/or voltage of the received first power signal, and to output the adjusted first power signal to the charging terminal through the first internal connector. A system of the electronic device is mounted on the second substrate. A power management circuit is mounted on the second substrate and configured to receive a second power signal for the system to operate from the discharging terminal through a second internal connector, and to supply the received second power signal to the system.

An electronic unit includes: a power receiving section configured to receive electric power fed from a feed unit by using a magnetic field; and a control section configured to perform, when a receiving current supplied from the power receiving section is less than a predetermined threshold current at a time of a light load, current increasing control to increase the receiving current to the threshold current or more.

Provided is a power supply device in which the reliability of a voltage output is improved, and also provided is a system comprising the power supply device and an electric tool. The power supply device (1) is provided with: a secondary battery cell (2a); an output unit connected to an electric tool and supplying the power of the secondary battery cell (2a) to the electric tool; and switching elements (Q1), (Q2) capable of interrupting a current path from the secondary battery cell (2a) to the electric tool. The switching element (Q1) switches whether or not to interrupt the current path not by being controlled by a control circuit (12) but in accordance with whether the electric tool connected to the output unit has a shorting bar (59) or not.