WIRELESS POWER TRANSMISSION APPARATUS AND WIRELESS POWER TRANSMISSION METHOD

• US 20160241087A1
• Filed: 02/16/2016
• Published: 08/18/2016
• Est. Priority Date: 02/16/2015
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: BAE, Su Ho
• Granted Patent: US 9,559,553 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

The embodiment relates to a wireless power transmission apparatus and a wireless power transmission method. The wireless power transmission apparatus includes a first power converting unit to generate high-frequency AC signals; a second power converting unit to generate low-frequency AC signals; a first coil receiving the high-frequency AC signals and transmitting a wireless power through a first power transmission scheme; a second coil receiving the low-frequency AC signals and transmitting the wireless power through a second power transmission scheme; and a control unit to control the first and second coils, wherein the control unit is configured to transmit a detection signal for the first power transmission scheme to a wireless power reception apparatus through the first coil, detect a reception of a first response signal corresponding to the first detection signal during a first predetermined time, determine a power transmission scheme of the wireless power reception apparatus as the first power transmission scheme in response to a detection of the first response signal, and deactivate the first power converting unit in response to no detection of the first response signal.

Claims

1. A wireless power transmission apparatus comprising:

a first power converting unit to generate high-frequency AC signals;

a second power converting unit to generate low-frequency AC signals;

a first coil receiving the high-frequency AC signals and transmitting a wireless power through a first power transmission scheme;

a second coil receiving the low-frequency AC signals and transmitting the wireless power through a second power transmission scheme; and

a control unit to control the first and second coils,

wherein the control unit is configured to transmit a detection signal for the first power transmission scheme to a wireless power reception apparatus through the first coil, detect a reception of a first response signal corresponding to the first detection signal during a first predetermined time, determine a power transmission scheme of the wireless power reception apparatus as the first power transmission scheme in response to a detection of the first response signal, and deactivate the first power converting unit in response to no detection of the first response signal.

2. The wireless power transmission apparatus of claim 1, wherein the control unit activates the second power converting unit in response to no detection of the first response signal, transmits a second detection signal to the wireless power reception apparatus through the second coil, detects a reception of a second response signal corresponding to the second detection signal during a second predetermined time, and determines the power transmission scheme of the wireless power reception apparatus as a second power transmission scheme in response to a detection of the second response signal.

3. The wireless power transmission apparatus of claim 2, wherein the control unit switches the first coil or the second coil according to the determined first power transmission scheme or second power transmission scheme, and transmits a power to the wireless power reception apparatus through the switched coil.

4. The wireless power transmission apparatus of claim 1, wherein the first response signal includes information about an amount of charge in the wireless power reception apparatus and a power is transmitted through the first power transmission scheme based on the information about the amount of charge.

5. The wireless power transmission apparatus of claim 1, wherein the first response signal includes information about a charging scheme of the wireless power reception apparatus.

6. The wireless power transmission apparatus of claim 1, wherein the first coil includes a resonance coil and the second coil includes an induction coil.

7. The wireless power transmission apparatus of claim 3, further comprising:

a power supply unit; and

a transforming unit to transform a power supplied from the power supply unit into a DC power,

wherein the first power converting unit and the second power converting unit receiving the DC power from the transforming unit.

8. The wireless power transmission apparatus of claim 7, further comprising a switch unit which selectively applies the power of the transforming unit to the power converting units according to the first power transmission scheme and the second power transmission scheme determined by the control unit.

9. The wireless power transmission apparatus of claim 7, wherein the transforming unit includes one of a buck converter, a boost converter and a buck-boost converter.

10. The wireless power transmission apparatus of claim 1, wherein the control unit includes a Bluetooth controller.

11. A wireless power transmission method of a wireless power transmission apparatus having a plurality of power transmission schemes, comprising:

activating a first transmission control unit that detects a first power transmission scheme;

transmitting a detection signal for the first power transmission scheme to a wireless power reception apparatus;

detecting a reception of a first response signal corresponding to the first detection signal during a first predetermined time;

determining a power transmission scheme of the wireless power reception apparatus as the first power transmission scheme in response to a detection of the first response signal; and

deactivating the first transmission control unit in response to no detection of the first response signal.

12. The wireless power transmission method of claim 11, further comprising:

activating a second transmission control unit in response to no detection of the first response signal;

transmitting a second detection signal to the wireless power reception apparatus;

detecting a reception of a second response signal corresponding to the second detection signal during a second predetermined time; and

determining the power transmission scheme of the wireless power reception apparatus as a second power transmission scheme in response to a detection of the second response signal.

13. The wireless power transmission method of claim 12, further comprising:

transmitting a power to the wireless power reception apparatus through the determined first power transmission scheme or second power transmission scheme.

14. The wireless power transmission method of claim 12, wherein the second response signal corresponding to the second detection signal includes information about an amount of charge in the wireless power reception apparatus and a power is transmitted through the second power transmission scheme based on the information about the amount of charge.

15. The wireless power transmission method of claim 12, wherein the second response signal corresponding to the second detection signal includes information about a charging scheme of the wireless power reception apparatus.

16. The wireless power transmission method of claim 11, wherein the first response signal corresponding to the first detection signal includes information about an amount of charge in the wireless power reception apparatus and a power is transmitted through the first power transmission scheme based on the information about the amount of charge.

17. The wireless power transmission method of claim 12, wherein the first response signal corresponding to the first detection signal includes information about a charging scheme of the wireless power reception apparatus.

18. The wireless power transmission method of claim 11, wherein the first power transmission scheme includes an electromagnetic resonance scheme and the second power transmissions scheme includes an electromagnetic induction scheme.