Wireless power transmission method for preventing frequency interference

• US 9,276,641 B2
• Filed: 12/01/2011
• Issued: 03/01/2016
• Est. Priority Date: 05/04/2011
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Corp., UIF Yonsei University
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Inventors: Hur, Namwoong, Kim, Singu
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Dhillon, Jagdeep
• Application Number:
  US13/308,988
• Publication Number:
  US 20120280574A1
• Time in Patent Office: 1,552 Days
• Field of Search: 307/104, 307/10.1, 307/9.1, 307/82, 307/39, 370/329, 370/328, 370/252, 375/260, 455/67.11, 455/509
• US Class Current: 1/1
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60R 25/406 Power supply in the remote key
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• 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: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

The present invention relates to a wireless power transmission method for preventing frequency interference, and more particularly, to a wireless power transmitter and a wireless power transmission method for preventing frequency interference that flexibly controls an operation of the wireless power transmitter in order to avoid signal interference and collision between different apparatuses using frequencies adjacent to a frequency band of a power signal transmitted from the wireless power transmitter.

Claims

1. A wireless power transmission method for preventing frequency interference in a wireless power system including a wireless power charger and an adjacent-frequency-using apparatus, the method comprising:

generating, by the vehicle wireless charger, a power signal, which is a low frequency signal;

transmitting, by the vehicle wireless charger, the power signal through a first antenna while the vehicle wireless charger is operating;

generating, by the adjacent-frequency-using apparatus, a power transmission restriction signal to cause the vehicle wireless charger to temporarily stop operating;

transmitting, by the adjacent-frequency-using apparatus, the power transmission restriction signal; and

searching, by the adjacent-frequency-using apparatus, the low frequency signal using a second antenna, without signal interference, while the operation of the vehicle wireless charger is temporarily stopped.

2. The wireless power transmission method of claim 1, wherein the adjacent-frequency-using apparatus includes a smart key unit.

3. The wireless power transmission method of claim 1, wherein the transmitting of the power signal, by the vehicle wireless charger, includes:

interrupting the searching of the low frequency signal of the adjacent-frequency-using apparatus using a frequency adjacent to a frequency band used by the power signal.

4. The wireless power transmission method of claim 1, wherein the transmitting of the power transmission restriction signal, by the adjacent-frequency-using apparatus, includes:

transmitting the power signal to the vehicle wireless charger.

5. The wireless power transmission method of claim 1, further comprising:

stopping the transmission of the power transmission restriction signal of the adjacent-frequency-using apparatus to the vehicle wireless charger to cause the vehicle wireless charger to operate again, when the searching of the low frequency signal is terminated.

6. The wireless power transmission method of claim 1, wherein the transmitting of the power transmission restriction signal to the vehicle wireless charger includes:

consistently transmitting, by the adjacent-frequency-using apparatus, the power transmission restriction signal while the adjacent-frequency-using apparatus is operating, thereby causing the vehicle wireless charger to not operate while the adjacent-frequency-using apparatus operates.

7. The wireless power transmission method of claim 1, wherein the transmitting of the power transmission restriction signal to the vehicle wireless charger includes:

operating the adjacent-frequency-using apparatus after a predetermined time after transmitting the power transmission restriction signal.

8. The wireless power transmission method of claim 6, wherein the transmitting of the power transmission restriction signal to the vehicle wireless charger includes:

operating the adjacent-frequency-using apparatus after a predetermined time after transmitting the power transmission restriction signal.