WIRELESS POWER TRANSMISSION AND CHARGING SYSTEM AND METHOD THEREOF

• US 20120281547A1
• Filed: 04/27/2012
• Published: 11/08/2012
• Est. Priority Date: 05/06/2011
• Status: Active Grant

• Current Assignee: Lclink Co., Ltd., Samsung Electronics Co. Ltd.
• Original Assignee: Lclink Co., Ltd., Samsung Electronics Co. Ltd.
• Inventors: KIM, Nam Yun, KWON, Sang Wook, PARK, Yun Kwon, HONG, Young Tack, LEE, Chang Ho
• Granted Patent: US 9,391,671 B2
• Time in Patent Office: Days
• US Class Current: 370/242
• 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 wake-up request message to a target device through an in-band communication scheme or an out-band communication scheme in which data is transmitted and received using a resonance frequency; and

receiving, from the target device, an acknowledgement (ACK) message in response to the wake-up request message,

wherein at least one of the wake-up request message and the ACK message corresponds to a shortened packet that is generated by converting a packet of a byte scale into a packet of a bit scale.

2. The communication method of claim 1, further comprising:

generating power to be used by the target device for communication 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.

3. The communication method of claim 1, 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 1, 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 ACK message 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, further comprising:

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

8. The communication method of claim 7, wherein the request message or the information 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 direct a power supply to a load,

a command to request suspension of the power supply to the load,

a command to request state information about the target device,

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.

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

transmitting a request message or an information message to a target device, through an in-band communication scheme in which data is transmitted and received using a resonance frequency or an out-band communication scheme; and

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

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, a field to indicate a command to be transferred to 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.

11. 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 direct a power supply to a load,

a command to request suspension of the power supply to the load,

a command to request state information about the target device,

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.

10. The communication method of claim 10, further comprising:

generating power to be used by the target device for communication, 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.

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

receiving a wake-up request message from a source device; and

transmitting, to the source device, an acknowledgement (ACK) message in response to the wake-up request message, 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 12, further comprising receiving, through magnetic coupling with the source device, power that is to be used for communication.

14. The communication method of claim 12, wherein the ACK message 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 12, further comprising:

receiving, from the source device, a request message or an information 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 request message or the information message.

16. The communication method of claim 15, 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 the shortened packet.

17. The communication method of claim 16, 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.

18. The communication method of claim 15, 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.

19. The communication method of claim 18, 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.

20. A wireless power transmitter comprising:

a communication unit configured to transmit a wake-up request message to the target device through an in-band communication scheme in which data is transmitted and received using the resonance frequency or an out-band communication scheme; and

a receiver configured to receive, from the target device, an acknowledgement (ACK) message in response to the wake-up request message,

wherein at least one of the wake-up request message and the ACK message corresponds to a shortened packet generated by converting a packet of a byte scale to a packet of a bit scale.

21. The wireless power transmitter of claim 20, further comprising:

a power converting unit configured to generate power to be used by the target device for communication 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.

22. A wireless power transmitter comprising:

a control and communication unit configured to transmit a request message or an information message to the target device through an in-band communication scheme in which data is transmitted and received using a resonance frequency or an out-band communication scheme,

wherein 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, a field to indicate a command to be transferred to 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.

23. The wireless power transmitter of claim 22, further comprising:

a power converting unit configured to generate power to be used by the target device for communication, 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.

24. A wireless power receiver comprising:

a control and communication unit configured to demodulate a message received from the source device, and to transmit, to the source device, a response message corresponding to the message received from the source device,

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

25. The wireless power receiver of claim 24, further comprising:

a target resonator configured to receive, through magnetic coupling with the source device, power that is to be used for communication.