Wireless power receiver and control method thereof

• US 10,355,529 B2
• Filed: 11/08/2016
• Issued: 07/16/2019
• Est. Priority Date: 09/08/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Kyung-Woo, Won, Eun-Tae, Lee, Young-Min, Park, Se-Ho, Kang, Noh-Gyoung, Byun, Kang-Ho
• Primary Examiner(s): Barnie, Rexford N
• Assistant Examiner(s): Ortiz, Elim
• Application Number:
  US15/346,338
• Publication Number:
  US 20170054331A1
• Time in Patent Office: 980 Days
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• 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
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

Methods and apparatus are provided for controlling a wireless power receiver for wirelessly receiving power. A drive power for driving the wireless power receiver is received from a wireless power transmitter. A communication network is established with the wireless power transmitter. A wireless power network that is controlled by the wireless power transmitter is joined. A charge power is received from the wireless power transmitter.

Claims

1. A method of controlling a wireless power receiver, the method comprising:

receiving, from a wireless power transmitter, a first power for initiating a communication unit through a power reception unit of the wireless power receiver;

after initiating the communication unit, establishing a communication connection with the wireless power transmitter while receiving the first power, through the communication unit of the wireless power receiver;

joining, through the communication unit, a wireless power network corresponding to the wireless power transmitter while receiving the first power;

receiving, through the communication unit, a command signal indicating a charge start command from the wireless power transmitter; and

based on receiving the command signal, starting charging a battery of the wireless power receiver, by using a second power which is received through the power reception unit from the wireless power transmitter.

2. The method as claimed in claim 1, wherein establishing the communication connection includes:

transmitting, through the communication unit, a first signal to the wireless power transmitter; and

receiving, through the communication unit, a second signal corresponding to the first signal from the wireless power transmitter.

3. The method as claimed in claim 2, wherein the first signal comprises information of impedance regarding the wireless power receiver.

4. The method as claimed in claim 1, wherein joining the wireless power network includes:

transmitting, through the communication unit, a third signal to the wireless power transmitter; and

receiving, through the communication unit, a fourth signal corresponding to the third signal from the wireless power transmitter.

5. The method as claimed in claim 4,

wherein the third signal comprises at least one of information regarding a Product ID of the wireless power receiver, information regarding a minimum voltage value applied to an input stage of a DC/DC conversion unit of the wireless power receiver and information regarding a maximum voltage value applied to the input stage of the DC/DC conversion unit of the wireless power receiver, and

wherein the fourth signal comprises at least one of manufacturer information of the wireless power transmitter, information regarding a protocol version of the wireless power transmitter, information regarding a hardware version of the wireless power transmitter, and information regarding power capacity of the wireless power transmitter.

6. The method as claimed in claim 1, wherein receiving the second power for charging the wireless power receiver includes starting to receive the second power for charging the wireless power receiver after receiving the command signal.

7. A wireless power receiver comprising:

a battery;

a communication unit;

a power reception unit configured to receive, from a wireless power transmitter, a first power for initiating the communication unit; and

a controller configured to

after initiating the communication unit establish, by using the communication unit, a communication connection with the wireless power transmitter while receiving the first power,

join, by using the communication unit, a wireless power network corresponding to the wireless power transmitter while receiving the first power,

receive, by using the communication unit, a command signal indicating a charge start command from the wireless power transmitter, and

based on receiving the command signal, control the wireless power receiver to start charging the battery by using a second power which is received through the power reception unit from the wireless power transmitter.

8. The wireless power receiver as claimed in claim 7, wherein the controller is further configured to transmit, by using the communication unit, a first signal to the wireless power transmitter and receive a second signal corresponding to the first signal from the wireless power transmitter.

9. The wireless power receiver as claimed in claim 8, wherein the first signal comprises information of impedance regarding the wireless power receiver.

10. The wireless power receiver as claimed in claim 7, wherein the controller is further configured to, by using the communication unit, transmit a third signal to the wireless power transmitter and receive a fourth signal corresponding to the third signal from the wireless power transmitter.

11. The wireless power receiver as claimed in claim 10,

wherein the third signal comprises at least one of information regarding a Product ID of the wireless power receiver, information regarding a minimum voltage value applied to an input stage of a DC/DC conversion unit of the wireless power receiver and information regarding a maximum voltage value applied to the input stage of the DC/DC conversion unit of the wireless power receiver, and

wherein the fourth signal comprises at least one of manufacturer information of the wireless power transmitter, information regarding a protocol version of the wireless power transmitter, information regarding a hardware version of the wireless power transmitter, and information regarding power capacity of the wireless power transmitter.

12. The wireless power receiver as claimed in claim 10, wherein the power reception unit is further configured to start to receive the second power for charging the wireless power receiver after receiving the command signal.

13. A method of controlling a wireless power transmitter, the method comprising:

transmitting a first power for initiating a communication unit of a wireless power receiver through a power reception unit of the wireless power receiver;

establishing, through the communication unit of the wireless power receiver, a communication connection with the wireless power receiver while transmitting the first power;

registering, by using the communication unit, the wireless power receiver to a wireless power network corresponding to the wireless power transmitter while transmitting the first power;

transmitting, through the communication unit, a command signal indicating a charge start command to the wireless power receiver; and

after transmitting the command signal, transmitting a second power for charging the wireless power receiver through the power reception unit, wherein the wireless power receiver starts to charge a battery of the wireless power receiver by using the second power, based on receiving the command signal.

14. The method as claimed in claim 13, wherein establishing the communication connection includes:

receiving, through the communication unit, a first signal from the wireless power receiver; and

transmitting, through the communication unit, a second signal corresponding to the first signal to the wireless power receiver.

15. The method as claimed in claim 14, wherein the first signal comprises information of impedance regarding the wireless power receiver.

16. The method as claimed in claim 13, wherein registering the wireless power receiver to the wireless power network includes:

receiving, through the communication unit, a third signal from the wireless power receiver; and

transmitting, through the communication unit, a fourth signal corresponding to the third signal to the wireless power receiver.

17. The method as claimed in claim 16,

wherein the third signal comprises at least one of information regarding a Product ID of the wireless power receiver, information regarding a minimum voltage value applied to an input stage of a DC/DC conversion unit of the wireless power receiver and information regarding a maximum voltage value applied to the input stage of the DC/DC conversion unit of the wireless power receiver, and

wherein the fourth signal comprises at least one of manufacturer information of the wireless power transmitter, information regarding a protocol version of the wireless power transmitter, information regarding a hardware version of the wireless power transmitter, and information regarding power capacity of the wireless power transmitter.

18. A wireless power transmitter comprising:

a power transmission unit;

a communication unit; and

a controller configured to

transmit, by using the power transmission unit, a first power for initiating the communication unit of a wireless power receiver,

establish, by using the communication unit, a communication connection with the wireless power receiver while transmitting the first power,

register, by using the communication unit, the wireless power receiver to a wireless power network corresponding to the wireless power transmitter while transmitting the first power,

transmit, by using the communication unit, a command signal indicating a charge start command to the wireless power receiver, and

transmit, by using the power transmission unit, a second power for charging the wireless power receiver, after transmitting the command signal,

wherein the wireless power receiver starts to charge a battery of the wireless power receiver by using the second power, based on receiving the command signal.

19. The wireless power transmitter as claimed in claim 18, wherein the controller is further configured to receive, by using the communication unit, a first signal from the wireless power receiver and transmit a second signal corresponding to the first signal to the wireless power receiver.

20. The wireless power transmitter as claimed in claim 19, wherein the first signal comprises information of impedance regarding the wireless power receiver.

21. The wireless power transmitter as claimed in claim 18, wherein the controller is further configured to receive, by using the communication unit, a third signal from the wireless power receiver and transmit a fourth signal corresponding to the third signal to the wireless power receiver.

22. The wireless power transmitter as claimed in claim 21,

wherein the third signal comprises at least one of information regarding a Product ID of the wireless power receiver, information regarding a minimum voltage value applied to an input stage of a DC/DC conversion unit of the wireless power receiver and information regarding a maximum voltage value applied to the input stage of the DC/DC conversion unit of the wireless power receiver, and

wherein the fourth signal comprises at least one of manufacturer information of the wireless power transmitter, information regarding a protocol version of the wireless power transmitter, information regarding a hardware version of the wireless power transmitter, and information regarding power capacity of the wireless power transmitter.