APPARATUS AND METHOD FOR CHARGING CONTROL IN WIRELESS CHARGING SYSTEM

• US 20180006488A1
• Filed: 09/19/2017
• Published: 01/04/2018
• Est. Priority Date: 11/26/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Iucf-hyu Industry-university Cooperation Foundation Hanyang University, Samsung Electronics Co. Ltd.
• Inventors: KIM, Dong Zo, KWON, Sang Wook, KIM, Ki Young, KIM, Nam Yun, MOON, Young Jin, PARK, Yun Kwon, SONG, Keum Su, AHN, Chi Hyung, RYU, Young Ho, YOO, Chang Sik, YOON, Chang Wook, CHOI, Jin Sung
• Granted Patent: US 10,205,353 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode.

Claims

1. An electronic device for charge control, the electronic device comprising:

a resonator configured to receive a power in a receiving mode, and relay an input power in a relay mode;

a direct current-to-direct current (DC/DC) converter configured to step down a voltage level of a direct current (DC) signal output from an alternating current-to-direct current (AC/DC) converter to a voltage level required for a load; and

a controller configured to control the electronic device for charge control to operate in one of the receiving mode, a transmitting mode, and the relay mode,

wherein the controller is further configured to connect the resonator to the AC/DC converter in the receiving mode, and to connect the resonator to an open port in the relay mode.

2. The electronic device of claim 1, wherein the controller is further configured to control the electronic device for charge control to operate in the relay mode when charging of the load is completed.

3. The electronic device of claim 1, wherein the controller is further configured to adjust an input impedance of the resonator to be greater than or equal to a predetermined value in the relay mode.

4. The electronic device of claim 1, wherein the controller is further configured to open the resonator by controlling the DC/DC converter for a supply voltage of “

0”

volts to be supplied to a power amplifier in the relay mode.

5. The electronic device of claim 1, wherein the controller is further configured to disconnect the resonator to the AC/DC converter and connect the resonator to a power amplifier in the transmitting mode.

6. The electronic device of claim 5, wherein the DC/DC converter is further configured to step up a voltage level output from the load to be greater than or equal to a supply voltage level for the power amplifier in the transmitting mode.

7. The electronic device of claim 1, wherein the DC/DC converter comprises:

a first capacitor connected to a power amplifier;

a second capacitor connected to the load; and

an output voltage determining unit configured to determine a voltage applied to the first capacitor to be an output voltage of the DC/DC converter in the transmitting mode, and to determine a voltage applied to the second capacitor to be an output voltage of the DC/DC converter in the receiving mode.

8. An electronic device for charge control, the electronic device comprising:

a resonator configured to transmit a power in a transmitting mode, and relay an input power in a relay mode;

a direct current-to-direct current (DC/DC) converter configured to step up a voltage level output from a load to be greater than or equal to a supply voltage level for a power amplifier in the transmitting mode; and

a controller configured to control the electronic device for charge control to operate in one of a receiving mode, the transmitting mode, and the relay mode,

wherein the controller is further configured to connect the resonator to the power amplifier in the transmitting mode, and to connect the resonator to an open port in the relay mode.

9. The electronic device of claim 8, wherein the controller is further configured to control the electronic device for charge control to operate in the relay mode when charging of the load is completed.

10. The electronic device of claim 8, wherein the controller is further configured to adjust an input impedance of the resonator to be greater than or equal to a predetermined value in the relay mode.

11. The electronic device of claim 8, wherein the controller is further configured to open the resonator by controlling the DC/DC converter for a supply voltage of “

0”

volts to be supplied to the power amplifier in the relay mode.

12. The electronic device of claim 8, wherein the controller is further configured to disconnect the resonator to the power amplifier and to connect the resonator to an alternating current-to-direct current (AC/DC) converter that converts a power received wirelessly into a DC signal in the receiving mode.

13. The electronic device of claim 12, wherein the DC/DC converter is further configured to step down a voltage level of the DC signal output from the AC/DC converter to a voltage level required for the load.

14. The electronic device of claim 8, wherein the DC/DC converter comprises:

a first capacitor connected to the power amplifier;

a second capacitor connected to the load; and

an output voltage determining unit configured to determine a voltage applied to the first capacitor to be an output voltage of the DC/DC converter in the transmitting mode, and to determine a voltage applied to the second capacitor to be an output voltage of the DC/DC converter in the receiving mode.

15. A method for charge control, the method comprising:

controlling an electronic device for charge control to operate in one of a receiving mode, a transmitting mode, and a relay mode;

adjusting an input impedance of the resonator in response to operating in the relay mode; and

relaying an input power based on the adjustment.

16. The method of claim 15, wherein the controlling comprises controlling the electronic device for charge control to operate in the relay mode when charging of the load is completed.

17. The method of claim 15, wherein the adjusting comprises connecting the resonator to an open port.

18. The method of claim 15, wherein the adjusting comprises opening the resonator by controlling direct current-to-direct current (DC/DC) converter for a supply voltage of “

0”

volts to be supplied to a power amplifier in the relay mode.

19. The method of claim 15, wherein the resonator is connected to an alternating current-to-direct current (AC/DC) converter in the receiving mode, connected to a power amplifier in the transmitting mode, and connected to an open port in the relay mode.