Device and method for performing wireless power transfer on basis of heterogeneous communication

Patent metadata

Field	Value
Publication number	US-12095524-B2
Application number	US-201917296186-A
Country	US
Kind code	B2
Filing date	Aug 6, 2019
Priority date	Dec 18, 2018
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

The present invention relates to a device and a method for performing wireless power transfer on the basis of heterogeneous communication. Disclosed in the present specification is a wireless power receiving device comprising: a power pickup unit configured to receive wireless power from a wireless power transfer device by magnetically coupling with the wireless power transfer device at an operating frequency, and convert an alternating current signal generated by the wireless power into a direct current signal; a communication/control unit configured to receive the direct current signal from the power pickup unit, and perform an in-band communication using the operating frequency and/or an out-band communication using a frequency other than the operating frequency; and a load configured to receive the direct current signal from the power pickup unit. Configuration information, control information and management information related to wireless power transfer, and procedures related to the exchange thereof are defined as an out-band communication protocol, and thus various applications of wireless power can be supported.

First claim

What is claimed is:

1. A wireless power receiving device supporting heterogeneous communication, comprising:
a power pick-up unit configured to receive wireless power from a wireless power transmitting device by magnetic coupling with the wireless power transmitting device at an operating frequency and convert an alternating current signal generated by the wireless power into a direct current signal;
a communication and control unit configured to receive the direct current signal from the power pick-up unit and perform in-band communication using the operating frequency and/or out-band communication using a frequency other than the operating frequency; and
a load configured to receive the direct current signal from the power pick-up unit,
wherein the communication and control unit is configured to perform a procedure of handover from the in-band communication to the out-band communication, after the wireless power receiving device is detected by the wireless power transmitting device, based on the in-band communication,
wherein the communication and control unit performs a handover procedure, based on a connection establishment procedure between devices of Bluetooth low energy (BLE),
wherein, upon completion of the connection establishment procedure between the devices of BLE, the communication and control unit is configured to transmit characteristic information on the wireless power receiving device to the wireless power transmitting device, based on a generic attribute profile (GATT), or receive characteristic information on the wireless power transmitting device from the wireless power transmitting device,
wherein the characteristic information on the wireless power receiving device is transmitted in at least one phase among an identification and configuration phase, a negotiation phase, a calibration phase, a power transfer phase, and a renegotiation phase,
wherein the communication and control unit includes an out-band communication module performing the out-band communication and an in-band communication module performing the in-band communication,
wherein the out-band communication module is configured to transmit a first phase change indicator to the in-band communication module based on changing of the phase, and
wherein the in-band communication module is configured to transmit a second phase change indicator to the out-band communication module based on changing of the phase.

2. The wireless power receiving device of claim 1 , wherein the connection establishment procedure between the devices uses a fast advertising or directed advertising packet, and a connection request packet.

3. The wireless power receiving device of claim 2 , wherein the communication and control unit is configured to perform operations of receiving the fast advertising packet or the directed advertising packet from the wireless power transmitting device through scanning, and transmitting the connection request packet to the wireless power transmitting device in response to the fast advertising packet or the directed advertising packet.

4. The wireless power receiving device of claim 2 , wherein the communication and control unit is configured to perform operations of transmitting the fast advertising packet or the directed advertising packet to the wireless power transmitting device, and receiving the connection request packet from the wireless power transmitting device in response to the fast advertising packet or the directed advertising packet.

5. The wireless power receiving device of claim 1 , wherein the characteristic information on the wireless power receiving device is transmitted by being included in a write request message based on the GATT.

6. The wireless power receiving device of claim 1 , wherein the characteristic information on the wireless power receiving device is transmitted by being included in an indication message or notification message based on the GATT.

7. The wireless power receiving device of claim 1 , wherein the communication and control unit is configured to perform a procedure for negotiating a maximum transmission unit (MTU) which is a transmittable maximum data size with the wireless power transmitting device, and perform transmission or reception of data generated based on the MTU upon completion of the negotiation for the MTU.

8. The wireless power receiving device of claim 7 , wherein the generated data is authentication-related data.

9. The wireless power receiving device of claim 1 , wherein the communication and control unit is configured to perform transmission or reception of data generated based on a Logical Link Control and Adaptation Protocol (L2CAP).

10. The wireless power receiving device of claim 1 , wherein the characteristic information on the wireless power receiving device and the characteristic information on the wireless power transmitting device are defined by a wireless power transfer (WPT) service provided by a WPT dedicated Bluetooth profile.

11. The wireless power receiving device of claim 1 , wherein the characteristic information on the wireless power receiving device and the characteristic information on the wireless power transmitting device are defined by a WPT service provided by other Bluetooth profiles.

12. A wireless power transmitting device supporting heterogeneous communication, comprising:
a power conversion unit configured to transmit wireless power to a wireless power receiving device by magnetic coupling with the wireless power receiving device at an operating frequency; and
a communication and control unit configured to perform in-band communication using the operating frequency and/or out-band communication using a frequency other than the operating frequency,
wherein the communication and control unit is configured to perform a procedure of handover from the in-band communication to the out-band communication, after the wireless power receiving device is detected based on the in-band communication,
wherein the communication and control unit performs a handover procedure, based on a connection establishment procedure between devices of Bluetooth low energy (BLE),
wherein, upon completion of the connection establishment procedure between the devices of BLE, the communication and control unit is configured to receive characteristic information on the wireless power receiving device from the wireless power receiving device, based on a generic attribute profile (GATT), or transmit characteristic information on the wireless power transmitting device to the wireless power receiving device,
wherein the characteristic information on the wireless power receiving device is received in at least one phase among an identification and configuration phase, a negotiation phase, a calibration phase, a power transfer phase, and a renegotiation phase,
wherein the communication and control unit includes an out-band communication module performing the out-band communication and an in-band communication module performing the in-band communication,
wherein the out-band communication module is configured to transmit a first phase change indicator to the in-band communication module based on changing of the phase, and
wherein the in-band communication module is configured to transmit a second phase change indicator to the out-band communication module based on changing of the phase.

Assignees

• Lg Electronics Inc

Inventors

• Choi Jingu
• Park Joonho
• Lim Jinkwon
• Park Yongcheol

Classifications

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H04B5/266

  One coil at each side, e.g. with primary and secondary coils · CPC title

• H04B5/45

  Transponders · CPC title

• H04B5/263

  Multiple coils at either side · CPC title

• H04W36/00

  Hand-off or reselection arrangements · CPC title