ELECTRONIC DEVICE AND METHOD FOR CONTROLLING RECHARGE OF BATTERY

• US 20200136421A1
• Filed: 10/25/2019
• Published: 04/30/2020
• Est. Priority Date: 10/26/2018
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Kyoungwon, Kim, Yusu, Lee, Kisun, Park, Minjung, Park, Seho, Choi, Hangseok, Yun, Yongsang, Cho, Chihyun
• Granted Patent: US 11,177,681 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00308 Overvoltage protection
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034

Abstract

An electronic device according to various embodiments may include: a coil configured to receive a signal for wirelessly obtaining power from an external electronic device; a wireless power circuit (MFC) configured to output the signal received by the coil as a DC signal; a first capacitive voltage divider circuit configured to adjust the voltage of, and to output, power according to a first voltage division ratio; a second capacitive voltage divider circuit configured to adjust the voltage of, and to output, power according to a second voltage division ratio; a controller configured to control the electronic device to provide the DC signal to at least one capacitive voltage divider circuit among the first capacitive voltage divider circuit and the second capacitive voltage divider circuit, based on a voltage value of the signal received through the coil; and a battery configured to receive another signal output from the at least one capacitive voltage divider circuit, based on the provided DC signal, thereby obtaining power.

Claims

1. An electronic device comprising:

a battery;

a coil configured to receive a signal for wirelessly obtaining power from an external electronic device;

a rectifier circuit configured to output the signal received by the coil as a DC signal;

a first capacitive voltage divider circuit configured to adjust the voltage of, and to output, a signal according to a first voltage division ratio;

a second capacitive voltage divider circuit configured to adjust the voltage of, and to output, a signal according to a second voltage division ratio; and

a controller operatively connected to the battery, the rectifier circuit, the first capacitive voltage divider circuit, and the second capacitive voltage divider circuit,

wherein the controller is configured to control the electronic device to;

provide the DC signal to at least one capacitive voltage divider circuit among the first capacitive voltage divider circuit and the second capacitive voltage divider circuit, based on a voltage value of the signal received through the coil, and

wherein the battery is configured to receive another signal output from the at least one capacitive voltage divider circuit, based on the provided DC signal.

2. The electronic device of claim 1, wherein, the DC signal is provided to the first capacitive voltage divider circuit based on the voltage value of the signal received through the coil falling within a reference voltage range.

3. The electronic device of claim 2, further comprising:

a bypass circuit for the second capacitive voltage divider circuit; and

a switch connected to the first capacitive voltage divider circuit and configured to selectively connect one of the second capacitive voltage divider circuit and the bypass circuit,

wherein the rectifier circuit is connected to the switch through the first capacitive voltage divider circuit,

wherein, the controller is configured to control the electronic device to connect the first capacitive voltage divider circuit to the bypass circuit through the switch such that the battery obtains another signal output from the first capacitive voltage divider circuit based on the output voltage of the rectifier circuit falling within another reference voltage range, and

wherein, the controller is configured to control the electronic device to connect the first capacitive voltage divider circuit to the second capacitive voltage divider circuit through the switch such that the battery obtains another signal output from the second capacitive voltage divider circuit based on the output voltage of the rectifier circuit falling outside of another reference voltage range.

4. The electronic device of claim 2, further comprising:

a bypass circuit for the second capacitive voltage divider circuit; and

a switch connected to the rectifier circuit and configured to selectively connect one of the second capacitive voltage divider circuit and the bypass circuit,

wherein the first capacitive voltage divider circuit is connected to the second capacitive voltage divider circuit and the bypass circuit,

wherein, the controller is configured to control the electronic device to connect the rectifier circuit to the bypass circuit through the switch such that the DC signal is provided to the first capacitive voltage divider circuit through the bypass circuit based on the output voltage of the rectifier circuit falling within another reference voltage range, and

wherein, the controller is configured to control the electronic device to connect the second capacitive voltage divider circuit to the bypass circuit through the switch such that the DC signal is provided to the first capacitive voltage divider circuit through the second capacitive voltage divider circuit based on the output voltage of the rectifier circuit falling outside of another reference voltage range.

5. The electronic device of claim 1, wherein the controller is configured control the electronic device to:

provide the DC signal to the first capacitive voltage divider circuit and provide a signal output from the first capacitive voltage divider circuit to the second capacitive voltage divider circuit based on the output voltage of the rectifier circuit falling within another reference voltage range, and

wherein the battery is configured to receive another signal output from the second capacitive voltage divider circuit.

6. The electronic device of claim 1, wherein the controller is configured to control the electronic device to:

produce data for configuring a signal for wirelessly obtaining power transmitted by the external electronic device, based on at least one of a battery voltage of the battery and a temperature of the rectifier circuit; and

transmit the produced data to the external electronic device.

7. The electronic device of claim 1, wherein the controller is configured to control the electronic device to:

produce data for configuring a signal for wirelessly obtaining power, based on a temperature of the at least one capacitive voltage divider circuit provided with the DC signal; and

transmit the produced data to the external electronic device.

8. The electronic device of claim 1, wherein the controller is configured to control the electronic device to provide the DC signal to the other capacitive voltage divider circuit based on a temperature of the at least one capacitive voltage divider circuit provided with the DC signal falling outside of a reference temperature range.

9. An electronic device comprising:

a battery;

a coil configured to transmit and receive a signal for wirelessly obtaining power from and providing power to an external electronic device;

a wireless charging circuit configured to output the signal for wirelessly obtaining power received by the coil from the external electronic device as a DC signal;

a capacitive voltage divider circuit electrically connected to the wireless charging circuit and the battery and configured to adjust the voltage of, and to output, a signal according to a voltage division ratio;

a power management integrated circuit electrically connected to the wireless charging circuit and the battery and configured to adjust the voltage of, and to output, a signal, based on power output information configured in the battery; and

a controller operatively connected to the wireless charging circuit, the capacitive voltage divider circuit, and the power management integrated circuit,

wherein the controller is configured to control the electronic device to provide the DC signal to at least one circuit of the capacitive voltage divider circuit or the power management integrated circuit (PMIC), based on a voltage value of the signal received through the coil, and

wherein the battery is configured to receive another signal output from the at least one circuit, based on the provided DC signal.

10. The electronic device of claim 9, wherein the controller is configured to control the electronic device to provide the DC signal to the capacitive voltage divider circuit based on the voltage value of the signal received through the coil falling within a reference voltage range.

11. The electronic device of claim 9, wherein the controller is configured to control the electronic device to provide the DC signal to the power management integrated circuit (PMIC) based on the voltage value of the signal received through the coil falling within a reference voltage range.

12. The electronic device of claim 9, wherein the controller is configured to control the electronic device to provide the DC signal to the capacitive voltage divider circuit and the power management integrated circuit (PMIC) based on the voltage value of the signal received through the coil falling within a reference voltage range.

13. The electronic device of claim 9, wherein the controller is configured to control the electronic device to:

produce data for configuring a signal for wirelessly obtaining power transmitted by the external electronic device based on a temperature of the circuit provided with the DC signal, among the capacitive voltage divider circuit and the power management integrated circuit (PMIC); and

transmit the produced data to the external electronic device.

14. The electronic device of claim 9, wherein the controller is configured to control the electronic device to provide the DC signal to the other circuit that is not provided with the DC signal, among the capacitive voltage divider circuit and the power management integrated circuit (PMIC), based on a temperature of the circuit provided with the DC signal, among the capacitive voltage divider circuit and the power management integrated circuit (PMIC), falling outside of a reference temperature range.

15. The electronic device of claim 9, further comprising a power interface comprising power interface circuitry configured to transmit and receive a signal for obtaining power in a wired manner from another external electronic device and configured to be connected to the capacitive voltage divider circuit and the power management integrated circuit,

wherein the controller is configured to control the electronic device to provide a signal for obtaining power in a wired manner from the another external electronic device to the other circuit that is not provided with the DC signal, among the capacitive voltage divider circuit and the power management integrated circuit (PMIC).

16. The electronic device of claim 15, wherein the controller is configured to control the electronic apparatus to:

produce data for configuring a signal for obtaining power in a wired manner, transmitted by the another external electronic device, based on a temperature of the power interface; and

transmit the produced data to the another external electronic device.

17. The electronic device of claim 15, wherein the controller is configured to control the electronic device to receive a signal for obtaining power from one external electronic device, among the external electronic device or the another external electronic device, and transmit a signal for obtaining power to a remaining external electronic device.

18. The electronic device of claim 17, wherein the one external electronic device includes the external electronic device, and the remaining external electronic device includes the another external electronic device.

19. The electronic device of claim 17, wherein the one external electronic device includes the another external electronic device, and the remaining external electronic device includes the external electronic device.

20. An electronic device comprising:

a coil configured to receive a wireless power signal from an external electronic device;

a wireless power reception circuit electrically connected to the coil;

a first voltage divider circuit electrically connected to the wireless power reception circuit;

a second voltage divider circuit electrically connected to the first voltage divider circuit and a battery;

a charging circuit configured to supply wireless power input from the wireless power reception circuit to the battery; and

a controller,

wherein the control is configured to control the electronic device to;

receive identification information of the external electronic device;

provide the received wireless power to the battery using at least one of the first voltage divider circuit or the second voltage divider circuit based on the identification information satisfying a specified condition, and compare a voltage rectified by the power reception circuit with a battery voltage, thereby transmitting configuration or response data for the wireless power signal to the external electronic device; and

charge the battery with the received wireless power using the charging circuit based on the identification information not satisfying a specified condition.