WIRELESS POWER TRANSMITTER AND RECEIVER, AND METHOD FOR TRANSMITTING EMERGENCY INFORMATION IN A WIRELESS CHARGING NETWORK

• US 20140111018A1
• Filed: 10/21/2013
• Published: 04/24/2014
• Est. Priority Date: 10/19/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Hyuk-Choon, Lee, Kyung-Woo, Byun, Kang-Ho, Jung, Hee-Won
• Granted Patent: US 9,979,439 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/007192 in response to temperature
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

An apparatus and a method are provided for efficiently transmitting emergency information in a wireless charging network. The method includes receiving wireless charging power from a wireless power transmitter; detecting an occurrence of an emergency situation; generating an emergency signal including information of the emergency situation; and transmitting the generated emergency signal to the wireless power transmitter.

Claims

1. A method for transmitting emergency information by a wireless power receiver, the method comprising:

receiving wireless charging power from a wireless power transmitter;

detecting an occurrence of an emergency situation;

generating an emergency signal including information of the emergency situation; and

transmitting the generated emergency signal to the wireless power transmitter.

2. The method of claim 1, wherein the emergency situation comprises at least one of an over voltage, an over current, an over temperature, and a system error.

3. The method of claim 1, wherein the emergency signal comprises a wireless power receiver dynamic signal.

4. The method of claim 1, further comprising entering an initial mode state after transmitting the emergency signal.

5. The method of claim 1, further comprising setting a new communication link with the wireless power transmitter, after transmitting the emergency signal, when the wireless power transmitter attempts to power off.

6. The method of claim 1, further comprising:

changing to a broadcast mode after transmitting the emergency signal; and

transmitting an advertisement packet including a target address and the information of the emergency situation.

7. A method for processing emergency information by a wireless power transmitter that transmits wireless charging power to wireless power receivers included in a wireless charging network of the wireless power transmitter, the method comprising:

receiving the emergency information from a first wireless power receiver included in the wireless charging network;

stopping transmission of the wireless charging power supplied to the first wireless power receiver, according to the received emergency information; and

transmitting the emergency information to a second wireless power receiver included in the wireless charging network.

8. The method of claim 7, further comprising entering a reset mode.

9. The method of claim of 7, further comprising:

turning off a power module of the wireless power transmitter; and

entering a transmission error mode.

10. The method of claim 7, further comprising entering a latch fault mode when over voltage information is included in the emergency information.

11. The method of claim 7, further comprising lowering a transmission power of the wireless power transmitter when over voltage information is not included in the emergency information.

12. A wireless power receiver, comprising:

a power reception unit that receives wireless charging power from a wireless power transmitter;

a controller that detects an occurrence of an emergency situation, and generates an emergency signal including information of the emergency situation; and

a communication unit that transmits the generated emergency signal to the wireless power transmitter.

13. The wireless power receiver of claim 12, wherein the emergency situation comprises at least one of:

an over voltage;

an over current;

an over temperature; and

a system error.

14. The wireless power receiver of claim 12, wherein the emergency signal comprises a wireless power receiver dynamic signal.

15. The wireless power receiver of claim 12, wherein the controller enters an initial mode state after the emergency signal is transmitted.

16. The wireless power receiver of claim 12, wherein the controller controls sets a new communication link with the wireless power transmitter, after the emergency signal is transmitted, when the wireless power transmitter attempts to power off.

17. The wireless power receiver of claim 12, wherein the controller changes to a broadcast mode, after the emergency signal is transmitted, and

wherein the communication unit transmits an advertisement packet including a target address and the information of the emergency situation.

18. A wireless power transmitter that transmits wireless charging power to wireless power receivers included in a wireless charging network of the wireless power transmitter, the wireless power transmitter comprising:

a power transmission unit that transmits the charging power to a first wireless power receiver included in the wireless charging network;

a communication unit that receives emergency information from the first wireless power receiver; and

a controller that stops transmission of the wireless charging power to of the first wireless power receiver, based on the received emergency information, and transfers the emergency information to a second wireless power receiver included in the wireless charging network.

19. The wireless power transmitter of claim 18, wherein the controller enters into a latch fault mode, when over voltage information is included in the emergency information.

20. The wireless power transmitter of claim 18, wherein the controller lowers a transmission power of the power transmission unit, when over voltage information is not included in the emergency information.