Structure of transmission and reception unit in wireless charging system

• US 9,325,187 B2
• Filed: 10/12/2012
• Issued: 04/26/2016
• Est. Priority Date: 05/21/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Jaesung, Park, Jinmoo, Seo, Jeongkyo, Son, Dohyeon, Lee, JungJoon
• Primary Examiner(s): Rossoshek, Helen
• Application Number:
  US13/651,001
• Publication Number:
  US 20130307468A1
• Time in Patent Office: 1,292 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

The present disclosure provides the structure of a transmission and reception unit in a wireless charging system. To this end, according to an embodiment, there is provided a wireless power receiver configured to receive a wireless power signal from a wireless power transmitter to receive wireless power, and the wireless power receiver may include a receiving coil unit comprising a primary coil and a secondary coil receiving the wireless power signal; and a charger configured to charge power which is a sum of wireless power received by the primary coil and the secondary coil, respectively, based on the wireless power signal.

Claims

1. A wireless power transmitter configured to transfer wireless power to a wireless power receiver, the wireless power transmitter comprising:

a transmitting coil assembly including;

a single transmitting coil configured to generate a wireless power signal and to transmit the wireless power signal to a receiving coil of the wireless power receiver,

wherein the single transmitting coil has an outer diameter and an inner diameter such that the single transmitting coil is configured to form a hollow portion; and

a shielding portion configured to shield a transmission of the wireless power signal in a specific direction, and provided with a recessed structure for accommodating the single transmitting coil,

wherein the shielding portion extends at a first predetermined distance beyond the outer diameter of the single transmitting coil, and the shielding portion is placed a second predetermined distance below the hollow portion.

2. The wireless power transmitter of claim 1, wherein the specific direction is a direction opposite to a direction in which the wireless power signal is transmitted to the receiving coil.

3. The wireless power transmitter of claim 1, further comprising:

an auxiliary interface surface for aligning with the receiving coil of the wireless power receiver.

4. The wireless power transmitter of claim 3, wherein the auxiliary interface surface is at least one of:

a display module configured to illuminate a light emitting diode (LED) to indicate an alignment position,

an audio output module, or

a haptic module.

5. The wireless power transmitter of claim 3, wherein the auxiliary interface surface is a marker or a lighting device marked on the auxiliary interface surface for aligning with the receiving coil of the wireless power receiver.

6. The wireless power transmitter of claim 1, wherein the first predetermined distance is at least 2 mm.

7. The wireless power transmitter of claim 1, wherein the second predetermined distance is 1 mm.

8. A wireless power transmitter configured to transfer wireless power to a wireless power receiver, the wireless power transmitter comprising:

a transmitting coil assembly including;

a single transmitting coil configured to generate a wireless power signal and to transmit the wireless power signal to a receiving coil of the wireless power receiver,

wherein the single transmitting coil has an outer diameter and an inner diameter such that the single transmitting coil is configured to form a hollow portion; and

a shielding portion configured to shield a transmission of the wireless power signal in a specific direction, and provided with a recessed structure for accommodating the single transmitting coil;

an interface surface configured to transfer the wireless power signal from the wireless power transmitter to the wireless power receiver,

wherein the hollow portion is placed between the shielding portion and the interface surface,

wherein the hollow portion is placed a first predetermined distance below the interface surface, and

wherein the hollow portion is placed a second predetermined distance over the shielding portion.

9. The wireless power transmitter of claim 8, wherein the specific direction is a direction opposite to a direction in which the wireless power signal is transmitted to the receiving coil.

10. The wireless power transmitter of claim 8, further comprising:

an auxiliary interface surface for aligning with the receiving coil of the wireless power receiver.

11. The wireless power transmitter of claim 10, wherein the auxiliary interface surface is at least one of:

a display module configured to illuminate a light emitting diode (LED) to indicate an alignment position,

an audio output module, or

a haptic module.

12. The wireless power transmitter of claim 10, wherein the auxiliary interface surface is a marker or a lighting device marked on the auxiliary interface surface for aligning with the receiving coil of the wireless power receiver.

13. The wireless power transmitter of claim 8, wherein the first predetermined distance is at least 1.75 mm.

14. The wireless power transmitter of claim 8, wherein the second predetermined distance is 1 mm.