WIRELESS POWER TRANSMISSION METHOD

• US 20110177787A1
• Filed: 12/16/2010
• Published: 07/21/2011
• Est. Priority Date: 01/15/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: HONG, Young Tack, KWON, Sang Wook, PARK, Eun Seok, HWANG, Chan Soo
• Granted Patent: US 8,571,609 B2
• Time in Patent Office: Days
• US Class Current: 455/67.11
• CPC Class Codes: H02J 13/00024 by means of mobile telephony
• 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: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 40/126 using wireless data transmission

Abstract

A wireless power transmission method is provided. The method includes exchanging information for wireless power transmission between a wireless power transmission device and a terminal, in order to determine a communication protocol.

Claims

1. A method of a wireless power transmission device for wirelessly transmitting power to a terminal, the method comprising:

transmitting a Broadcast Message (BM) while the wireless power transmission device is in an idle state;

receiving a connection request message from the terminal, and in response, transitioning from the idle state to a plug-in state;

establishing a connection with the terminal, and in response, transitioning from the plug-in state to a power transmission state where the power is wirelessly transmitted to the terminal; and

transitioning from the power transmission state to a plug-out state in which the connection to the terminal is terminated, when a charging completion message is received from the connected terminal.

2. The method of claim 1, wherein the establishing comprises:

authenticating the terminal;

performing a matching operation with the terminal when the authentication of the terminal is successful; and

wirelessly transmitting a test power to the terminal.

3. The method of claim 2, wherein the authenticating comprises:

receiving an authentication request message from the terminal;

performing the authentication of the terminal in response to the authentication request message; and

transmitting an authentication success message to the terminal, when the authentication of the terminal is successful.

4. The method of claim 3, wherein the transitioning to the plug-in state comprises transitioning from the idle state to the plug-in state when the authentication request message is received from the terminal.

5. The method of claim 3, wherein the transitioning to the power transmission state comprises transitioning from the plug-in state to the power transmission state, when the authentication of the terminal is successful.

6. The method of claim 2, wherein the matching operation comprises:

receiving a terminal information message from the terminal;

transmitting a transmission information message to the terminal; and

controlling a transmission parameter in response to the terminal information message.

7. The method of claim 2, wherein the wireless transmitting comprises:

receiving an efficiency information message from the terminal that includes information about a transmission efficiency of the test power which is wirelessly transmitted to the terminal; and

transmitting a plug-in completion message to the terminal when the transmission efficiency is equal to or greater than a reference value.

8. The method of claim 7, wherein the transitioning to the power transmission state comprises transitioning from the plug-in state to the power transmission state, when the plug-in completion message is transmitted to the terminal.

9. The method of claim 1, wherein, in the power transmission state, the following operations are performed:

transmitting a transmission check message to the terminal at each check interval; and

receiving, from the terminal, a state information message corresponding to the transmission check message.

10. The method of claim 1, wherein, while the wireless power transmission device is in the plug-out state, the method further comprises:

transmitting a transmission report message to the terminal; and

receiving an acknowledgement message in response to the transmission report message from the terminal.

11. The method of claim 1, further comprising:

transitioning from the plug-out state to the idle state when the broadcast period elapses after the connection to the terminal is terminated.

12. The method of claim 2, wherein, while the wireless power transmission device is in the plug-in state, the method further comprises:

transitioning to the idle state when the authentication of the terminal fails.

13. The method of claim 7, wherein the wireless transmitting further comprises:

transitioning to the idle state when the transmission efficiency is less than the reference value.

14. The method of claim 1, further comprising:

transitioning to the idle state when a terminal interrupt message is received from the terminal in one of the plug-in state, the power transmission state, and the plug-out state.

15. The method of claim 1, further comprising:

transmitting a source interrupt message to the terminal when an interrupt the wirelessly transmitting of the power occurs in one of the plug-in state, the power transmission state, and the plug-out state; and

transitioning to the idle state.

16. The method of claim 1, further comprising:

transitioning to the idle state when a time-out occurs in one of the plug-in state, the power transmission state, and the plug-out state.

17. A method of wirelessly transmitting a power, the method comprising:

transmitting a Broadcast Message (BM) at each broadcast period;

authenticating a terminal that receives the BM; and

wirelessly transmitting power to the terminal when the authentication of the terminal is successful.

18. The method of claim 17, further comprising:

transmitting a transmission check message to the terminal at each check interval; and

receiving, from the terminal, a state information message corresponding to the transmission check message.

19. The method of claim 17, further comprising:

interrupting the wireless transmitting of the power when a charging completion message is received from the terminal.

20. The method of claim 17, further comprising:

performing a matching operation with the terminal when the authentication of the terminal is successful.