Wireless power transmission and charging system and method thereof

• US 9,391,671 B2
• Filed: 04/27/2012
• Issued: 07/12/2016
• Est. Priority Date: 05/06/2011
• Status: Expired due to Fees

• Current Assignee: Lclink Co., Ltd., Samsung Electronics Co. Ltd.
• Original Assignee: Lclink Co., Ltd., Samsung Electronics Co. Ltd.
• Inventors: Kim, Nam Yun, Lee, Chang Ho, Kwon, Sang Wook, Park, Yun Kwon, Hong, Young Tack
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): Aung, Sai
• Application Number:
  US13/457,597
• Publication Number:
  US 20120281547A1
• Time in Patent Office: 1,537 Days
• Field of Search: 370242-245, 370/311, 370/375, 370/338, 370/349, 370/352, 320/108, 455/226.3, 455/343.1
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• 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 50/80 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary 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
• 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 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A wireless power transmission and charging system is provided. The wireless power transmission and charging system may include a source device to wirelessly transmit a power, and a target device to wirelessly receive the power. A communication error may be reduced, and a power transmission efficiency may be increased, by performing communication between the source device and the target device using a shortened packet generated by converting, for example, a packet of a byte scale to a packet of a bit scale.

Claims

1. A communication method of a wireless power transmission and charging system, the communication method comprising:

transmitting a first message to a target device for performing communication with the target device through an in-band communication using a resonance frequency or an out-band communication;

receiving, from the target device, information concerned with the target device in response to the first message;

transmitting, to the target device, a second message to control a power supply of the target device,

wherein the second message comprises a command to control the target device to provide a power to a load, or suspend a power supply to the load;

generating power to be used by the target device by converting a direct current (DC) voltage to an alternating current (AC) voltage using the resonance frequency; and

transmitting the power to the target device through magnetic coupling.

2. The communication method of claim 1, wherein at least one of the first message and the information concerned with the target device corresponds to a shortened packet that is generated by converting a packet of a byte scale into a packet of a bit scale.

3. The communication method of claim 2, wherein the shortened packet comprises a field to indicate a start of a packet, a field to indicate an identifier of the target device, a field to indicate a command to be transferred to the target device, and a field to check an error of the shortened packet.

4. The communication method of claim 2, wherein the shortened packet comprises a field to be added in order to prevent packet loss in a wireless environment, a field to indicate a start of a packet, a field to indicate a command to be transferred to a source device, a field to indicate data associated with the command, and a field to check an error of the shortened packet.

5. The communication method of claim 1, wherein the information concerned with the target device comprises at least one of a product type, manufacturer information, a product model name, a battery type, a charging scheme, an impedance value of a load, information about a characteristic of a target resonator, information about a used frequency band, an amount of a power to be used, an intrinsic identifier, and product version information or standards information.

6. The communication method of claim 1 further comprising:

assigning, to the target device, a virtual identifier to be used during charging.

7. The communication method of claim 1, wherein the second message comprises at least one of:

a reset command to request a reset of the target device, in response to an error occurring in an operation of the target device,

a command to request an input voltage value and an input current value of a target device,

a command to request a direct current to direct current (DC/DC) output voltage value and a DC/DC output current value of the target device,

a command to request state information about the target device,

a command to stop the power supply to the load,

a command to transfer communication regulations,

a command to request registration information about the target device,

a command to control the target resonator to be powered ON and OFF, and

a command to request a change of a message format.

8. A communication method of a wireless power transmission and charging system, the communication method comprising:

transmitting, to a target device, a request message or an information message to direct a predetermined operation;

receiving, from the target device, a response message corresponding to the request message or the information message;

generating power to be used by the target device, by converting a direct current (DC) voltage to an alternating current (AC) voltage using the resonance frequency; and

transmitting the power to the target device through magnetic coupling,

wherein at least one of the request message or the information message comprises a field to indicate a command to be transferred to the target device,

wherein the field to indicate the command comprises a command to control the target device to provide a power to a load or suspend a power supply to the load, and

wherein the transmitting the request message or the information message comprises;

transmitting, to a target device, the request message or the information message through an in-band communication using a resonance frequency or an out-band communication.

9. The communication method of claim 8, wherein at least one of the request message or the information message comprises a field to indicate a start of the request message or the information message, a field to indicate an identifier of the target device, and a check field to check an error of the request message or the information message, and each of the fields is of a bit scale.

10. The communication method of claim 9, wherein the field to indicate the command comprises at least one of:

a reset command to request a reset of the target device, in response to an error occurring in an operation of the target device,

a command to request an input voltage value and an input current value of a target device,

a command to request a DC/DC output voltage value and a DC/DC output current value of the target device,

a command to request state information about the target device,

a command to stop the power supply to the load,

a command to transfer communication regulations,

a command to request registration information about the target device,

a command to control the target resonator to be powered ON and OFF, and

a command to request a change of a message format.

11. A communication method of a wireless power transmission and charging system, the communication method comprising:

receiving a first message from a source device for performing communication with the source device through an in-band communication using a resonance frequency or an out-band communication; and

transmitting, to the source device, information concerned with a target device in response to the first message;

receiving, from the source device, a second message including a predetermined command;

performing an operation in accordance with the predetermined command; and

transmitting, to the source device, a response message corresponding to the second message,

wherein the second message comprises a command to control the target device to provide a power to a load, or suspend a power supply to the load.

12. The communication method of claim 11, wherein the transmitting information concerned with the target device comprises:

transmitting, to the source device, the information concerned with the target device, using a shortened packet generated by converting a packet of a byte scale to a packet of a bit scale.

13. The communication method of claim 11, further comprising receiving, through magnetic coupling with the source device, power that is to be used for communication.

14. The communication method of claim 11, wherein the information concerned with the target device comprises at least one of a product type, manufacturer information, a product model name, a battery type, a charging scheme, an impedance value of a load, information about a characteristic of a target resonator, information about a used frequency band, an amount of a power to be used, an intrinsic identifier, and product version information or standards information.

15. The communication method of claim 11, wherein the response message comprises a field to be added in order to prevent packet loss in a wireless environment, a field to indicate a start of a packet, a field to indicate a command to be transferred to a source device, a field to indicate data associated with the command, and a field to check an error of a shortened packet generated by converting a packet of a byte scale to a packet of a bit scale.

16. The communication method of claim 15, wherein the field to indicate the command comprises at least one of:

a command to indicate a response message in response to a request for an input voltage value and an input current value of a target device,

a command to indicate a response to a request for a DC-to-DC (DC/DC) output voltage value and a DC/DC output current value of the target device,

a command to indicate a response to a request for state information about the target device, and

a command to indicate a response to a request for registration information about the target device.

17. The communication method of claim 16 wherein the field to indicate the data associated with the command comprises at least one of an input voltage value and an input current value of a target device, a DC/DC output voltage value and a DC/DC output current value of the target device, state information about the target device, and registration information about the target device.

18. The communication method of claim 17, wherein the registration information about the target device comprises at least one of a product type, manufacturer information, a product model name, a battery type, a charging scheme, an impedance value of a load, information about a characteristic of a target resonator, information about a used frequency band, an amount of a power to be used, an intrinsic identifier, and product version information or standards information.

19. A wireless power transmitter comprising:

a transmitter configured to transmit a first message to a target device through an in-band communication using a resonance frequency for performing communication with the target device or an out-band communication;

a receiver configured to receive, from the target device, information concerned with the target device in response to the first message;

transmitting, to the target device, a second message to control a power supply of the target device,

wherein the second message comprises a command to control the target device to provide a power to a load, or suspend a power supply to the load;

a power converter configured to generate power to be used by the target device by converting a direct current (DC) voltage to an alternating current (AC) voltage using the resonance frequency; and

a source resonator configured to transmit the power to the target device through magnetic coupling,

wherein at least one of the first message and the information concerned with the target device corresponds to a shortened packet generated by converting a packet of a byte scale to a packet of a bit scale.

20. The wireless power transmitter of claim 19, wherein the transmitter is further configured to transmit wireless power for charging and/or powering a device using the resonance frequency.

21. A wireless power transmitter comprising:

a processor comprising;

a transmitter configured to transmit, to the target device, a first message and transmit a second message to control a power supply of the target device;

a receiver configured to receive, from the target device, a first response message corresponding to the first message and a second response message corresponding to the second message,

a power converter configured to generate power to be used by the target device, by converting a direct current (DC) voltage to an alternating current (AC) voltage using the resonance frequency; and

a source resonator configured to transmit the power to the target device through magnetic coupling,

wherein the second message comprises afield to indicate a command to be transferred to the target device,

wherein the field to indicate the command comprises a command to control the target device to provide a power to a load or suspend a power supply to the load, and

wherein the transmitter configured to transmit the second message comprises transmitting the second message through an in-band communication using a resonance frequency or an out-band communication.

22. The wireless power transmitter of claim 21, wherein the second message comprises a field to indicate a start of the request message or the information message, a field to indicate an identifier of the target device, and a check field to check an error of the request message or the information message, and each of the fields is of a bit scale.

24. The wireless power transmitter of claim 21, wherein the transmitter is further configured to transmit wireless power for charging and/or powering a device using the resonance frequency.

23. A wireless power receiver comprising:

a processor comprising;

a controller configured to demodulate a first message and second message received from a source device, and to transmit, to the source device, a first response message corresponding to the first message received from the source device and a second response message corresponding to the second message received from the source device,

wherein the second message received from the source device is received through an in-band communication using a resonance frequency or an out-band communication, and

wherein the first response message and second response message comprises a shortened packet generated by converting a packet of a byte scale to a packet of a bit scale.

25. A wireless power transmitter comprising:

a transmitter configured to transmit data on a channel through an in-band communication using a resonance frequency or an out-band communication;

a power converter configured to generate power to be used by a target device, by converting a direct current (DC) voltage to an alternating current (AC) voltage using the resonance frequency; and

a source resonator configured to transmit the power to the target device through magnetic coupling,

wherein the channel is utilized to transmit and receive wireless power for charging and/or powering a receiving device,

wherein the channel is utilized to transmit a second message comprising a field to indicate a command to be transferred to the target device,

wherein the field to indicate the command comprises a command to control the target device to provide a power to a load, or suspend a power supply to the load; and

a power supply configured to supply the power that is to be transmitted as the wireless power for charging and/or powering the device, wherein the data transmitted by the transmitter comprises a shortened packet that is generated by converting a packet of a byte scale into a packet of a bit scale.