Wireless charging device, method and system for negotiating power class by using short range wireless communication

Patent metadata

Field	Value
Publication number	US-12237697-B2
Application number	US-202017607973-A
Country	US
Kind code	B2
Filing date	Mar 5, 2020
Priority date	Apr 30, 2019
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

The present specification relates to: a wireless power receiving device, which can receive information about a power class on the basis of out-band communications at a short distance before the wireless power receiving device is positioned at the charging position of a wireless power transmitting device, and negotiate power class; the wireless power transmitting device; a wireless power transmitting method; a wireless power receiving method; and a wireless power transmitting system. According to the present specification, whether power of the wireless power transmitting device (or a charger) is suitable for the wireless power receiving device (or a device to be charged) is quickly identified remotely or at a short distance prior to a wireless power transmission (or wireless charging), appropriate charging power is set through negotiation, and then wireless charging can be safely performed.

First claim

What is claimed is:

1. A wireless power receiver comprising:
a power pick-up configured to:
receive, from a wireless power transmitter, an advertising packet including power class information for the wireless power transmitter; and

a communicator/controller configured to:
perform an in-band communication with the wireless power transmitter,

wherein the communicator/controller is further configured to:
perform a ping phase related to receiving a digital ping from the wireless power transmitter and transmitting a signal strength data packet via the in-band communication, after receiving the advertising packet,
perform a configuration phase related to transmitting a configuration data packet to the wireless power transmitter via the in-band communication, after performing the ping phase, and
perform a negotiation for a power class with the wireless power transmitter based on the power class information, after performing the configuration phase,

wherein the power class information includes power state information, mode information, and power class state information for each of coils among a plurality of coils supported by the wireless power transmitter, and
wherein the wireless power receiver is configured to, in a coverage on which (i) the in-band communication between the wireless power receiver and the wireless power transmitter is not available and (ii) an out-band communication between the wireless power receiver and the wireless power transmitter is available, receive the advertising packet including the power class information from the wireless power transmitter via the out-band communication, periodically.

2. The wireless power receiver of claim 1 , wherein the wireless power receiver establishes the out-band communication based on the advertising packet.

Assignees

• Lg Electronics Inc

Inventors

• Lee Minsoo
• Lim Jinkwon
• Choi Jingu

Classifications

• H02J13/1335

  involving a local wireless network, e.g. Wi-Fi®, ZigBee® or Bluetooth® · CPC title

• H02J7/42

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

• H02J50/402

  the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas · CPC title

• H02J50/60

  responsive to the presence of foreign objects, e.g. detection of living beings · CPC title

• H02J50/12

  of the resonant type · CPC title