公开(公告)号：US20220085667A1

公开(公告)日：2022-03-17

申请号：US17423844

申请日：2019-11-12

Applicant: LG ELECTRONICS INC.

Inventor： Joonho PARK ,  Jinkwon LIM ,  Jingu CHOI ,  Yongchepol PARK

IPC: H02J50/80 ,  H02J50/10 ,  H02J7/00

Abstract: The present specification relates to a device and method for supporting heterogeneous communication in a wireless power transfer system. The present specification discloses a wireless power reception device comprising: a power pickup circuit configured to receive, from a wireless power transfer device, wireless power generated on the basis of magnetic coupling in a power transfer phase; and a communication and control circuit configured to transmit, to the wireless power transfer device, a first random address packet including a random address of the wireless power reception device or receive, from the wireless power transfer device, a second random address packet including a random address of the wireless power transfer device via in-band communication. By performing a handover using a random address, cross reference can be prevented and security can be enhanced, and thus a BLE connection in a wireless charging system can be more safely performed.

公开(公告)号：US20220069631A1

公开(公告)日：2022-03-03

申请号：US17310110

申请日：2019-10-02

Applicant: LG ELECTRONICS INC.

Inventor： Jingu CHOI ,  Jinkwon LIM ,  Taeyoung SONG ,  Yongcheol PARK ,  Joonho PARK

IPC: H02J50/40 ,  H02J50/12 ,  H02J7/02 ,  H02J50/80 ,  H04B5/00

Abstract: The present disclosure relates to a device and method for wireless power transfer to multiple devices using a multi-coil. The device disclosed in the specification comprises: a power pickup unit configured to receive wireless power from a wireless power transfer device having a plurality of primary coils at an operation frequency by magnetic coupling to the wireless power transfer device and convert an alternating current signal generated by the wireless power into a direct current signal; a communication/control unit including an in-band communication module configured to be supplied with the direct current signal from the power pickup unit and perform communication with the wireless power transfer device by using the operating frequency, and an out-band communication module configured to perform communication with the wireless power transfer device by using a frequency other than the operating frequency; and a load configured to be supplied with the direct current signal from the power pickup unit. In a one-to-multiple wireless power transfer system using a multi-coil, various applications of wireless power can be efficiently supported by defining configuration information, control information, management information, and procedures for the exchanges thereof as an out-band communication protocol.

公开(公告)号：US20220014234A1

公开(公告)日：2022-01-13

申请号：US17296186

申请日：2019-08-06

Applicant: LG ELECTRONICS INC.

Inventor： Jingu CHOI ,  Joonho PARK ,  Jinkwon LIM ,  Yongcheol PARK

IPC: H04B5/00 ,  H04W76/10 ,  H02J50/12 ,  H02J50/80 ,  H02J50/40

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.

公开(公告)号：US20210066973A1

公开(公告)日：2021-03-04

申请号：US16961554

申请日：2019-01-08

Applicant: LG ELECTRONICS INC.

Inventor： Yongcheol PARK ,  Joonho PARK ,  Gyunghwan YOOK

IPC: H02J50/80 ,  H02J50/12 ,  H02J50/40

Abstract: The present invention relates to an apparatus and a method for performing power calibration in a wireless power transmission system. The present specification provides a wireless power transmission apparatus comprising: a power conversion unit configured to transmit, in a power transfer phase, wireless power generated on the basis of magnetic coupling to a wireless power receiving device; and a communication/control unit configured to perform an initial calibration for a power parameter prior to the power transfer phase, receive a first received power packet from the wireless power receiving device indicating the power received by the wireless power receiving device during the power transfer phase, and detect foreign matter by using the received power and a first power loss determined on the basis of the initial calibration. It is possible to adaptively respond to a newly changed wireless charging environment to calibrate transmission power and reception power, and it is possible to detect foreign matter more precisely by detecting a power loss on the basis of the calibrated transmission and reception power.

公开(公告)号：US20200227951A1

公开(公告)日：2020-07-16

申请号：US16741908

申请日：2020-01-14

Applicant: LG Electronics Inc.

Inventor： Joonho PARK ,  Seonghun LEE ,  Bongsik KWAK ,  Jihyun LEE ,  Sungkyu KIM

IPC: H02J50/60 ,  H02J50/12 ,  H01F38/14 ,  H02J7/00 ,  H02J50/40

Abstract: The present invention relates to a wireless power transfer apparatus. The wireless power transfer apparatus includes: a resonant circuit unit including a plurality of coils and a plurality of capacitor elements respectively connected to the plurality of coils; and a controller configured to calculate individual quality factor of each of the plurality of coils and a total quality factor of the plurality of coils, at a resonant frequency, and calculate whether foreign matter exists on a charging surface, based on the total quality factor and the individual quality factor, at the resonance frequency. Accordingly, foreign matter on the charging surface can be detected more easily.

公开(公告)号：US20200227932A1

公开(公告)日：2020-07-16

申请号：US16742374

申请日：2020-01-14

Applicant: LG ELECTRONICS INC.

Inventor： Sungkyu KIM ,  Seonghun LEE ,  Bongsik KWAK ,  Jihyun LEE ,  Joonho PARK

IPC: H02J7/00 ,  H02J50/80 ,  H02J50/40 ,  H02J50/12

Abstract: The present invention relates to a wireless power transmitting device. The wireless power transmitting device comprises a transmitter coil section with a plurality of partially overlapping transmitter coils; a fan for cooling heat generated by the transmitter coil section; and a controller for sending out a detection signal through the transmitter coil section, calculating the number of operating coils based on the strength of a response signal to the detection signal, and controlling the fan based on the calculated number of operating coils. Accordingly, heat generated by the transmitter coils can be reduced more efficiently.