公开(公告)号：US11796709B2

公开(公告)日：2023-10-24

申请号：US17096054

申请日：2020-11-12

申请人： Huawei Technologies Co., Ltd.

发明人： Mou He ,  Wei Chen ,  Yongfa Zhu

IPC分类号： G01V3/10 ,  H02J50/80 ,  H02J50/10 ,  H02J50/60 ,  G01V3/08 ,  G01V3/38

CPC分类号： G01V3/104 ,  G01V3/081 ,  G01V3/38 ,  H02J50/10 ,  H02J50/60 ,  H02J50/80

摘要： A detection coil includes a first group of coils, a second group of coils, and a third group of coils that are continuously wound and coaxial, and the second group of coils is located between the first group of coils and the third group of coils. A coil that generates the first magnetic field is coaxial with the first group of coils, the second group of coils, and the third group of coils. A sum of the induced electromotive forces of the first group of coils, the second group of coils, and the third group of coils is zero. When a metal foreign matter exists, a sum of the induced electromotive forces of the first group of coils, the second group of coils, and the third group of coils is not zero.

公开(公告)号：US11770029B2

公开(公告)日：2023-09-26

申请号：US17282654

申请日：2019-10-04

申请人： LG ELECTRONICS INC.

发明人： Joonho Park ,  Bongsik Kwak ,  Sungkyu Kim ,  Seonghun Lee ,  Jihyun Lee

IPC分类号： H02J50/40 ,  H02J50/80 ,  H02J50/10 ,  H02J50/60 ,  H04B5/00

CPC分类号： H02J50/402 ,  H02J50/10 ,  H02J50/60 ,  H02J50/80 ,  H04B5/0087

摘要： The present disclosure relates to a wireless power transmission device. A wireless power transmission device according to an embodiment of the present disclosure includes: a coil part including a plurality of partially overlapping coils; a coil combination generator configured to generate coil combinations including at least one of the plurality of coils; and a controller configured to transmit a coil selection signal through the coil combinations and to select an operating coil combination from the coil combinations based on a response intensity of a response signal for the coil selection signal and charging efficiency of a wireless power reception device. Accordingly, a high-efficiency charging area can be extended in partially overlapping multiple coils.

公开(公告)号：US11731521B2

公开(公告)日：2023-08-22

申请号：US17265243

申请日：2019-08-19

申请人： IHI Corporation

发明人： Eiichi Urushibata ,  Kenji Nishimura ,  Hideki Nagano

IPC分类号： H02J50/60 ,  H02J50/10 ,  B60L53/124 ,  B60L53/30

CPC分类号： B60L53/124 ,  H02J50/10 ,  H02J50/60 ,  B60L53/30 ,  H02J2310/48

摘要： A foreign object detection device detects, during wireless power transfer from a power transmission unit of a power transmission device to a power reception unit of a power reception device, a foreign object on the power transmission unit, and comprises: a temperature sensitive body that is disposed at the power transmission unit and changes a color with temperature; and a detection unit that detects the foreign object by detecting a change in the color.

公开(公告)号：US20230253827A1

公开(公告)日：2023-08-10

申请号：US18299793

申请日：2023-04-13

申请人： LG ELECTRONICS INC.

发明人： Yongcheol PARK

IPC分类号： H02J50/10 ,  H02J50/80 ,  H02J50/60 ,  H04B5/00 ,  H04L9/40 ,  H02J50/12

CPC分类号： H02J50/10 ,  H02J50/12 ,  H02J50/60 ,  H02J50/80 ,  H04B5/0037 ,  H04L9/40

摘要： A method for transferring, by a wireless power transmitter, wireless power, the method including performing digital ping in a ping phase; receiving a configuration packet of a wireless power receiver in a configuration phase after the ping phase; performing a negotiation of a power transfer contract in a negotiation phase after the configuration phase; and transferring the wireless power to the power receiver based on the power transfer contract in a power transfer phase after the negotiation phase, wherein the configuration packet includes a negotiation field, wherein the negotiation field related to whether the negotiation phase is supported is composed of 1 bit, wherein the configuration packet includes a out-of-band field, wherein the out-of-band field is composed of 1 bit, and wherein, based on the out-of-band field having a value of 1, the out-of-band field indicates that the wireless power receiver supports out-of-band communication, and based on the out-of-band field having a value of 0, the out-of-band field indicates that the wireless power receiver does not support the out-of-band communication.

公开(公告)号：US20230246489A1

公开(公告)日：2023-08-03

申请号：US18162886

申请日：2023-02-01

申请人： WiTricity Corporation

发明人： Hans Peter Widmer ,  Marcel Fischer ,  Ning Liu

IPC分类号： H02J50/60 ,  H02J50/12 ,  G06F3/044 ,  B60L53/124 ,  G01V3/10

CPC分类号： H02J50/60 ,  H02J50/12 ,  G06F3/044 ,  B60L53/124 ,  G01V3/101

摘要： In aspects, techniques for detecting and discriminating foreign objects near an inductive wireless power transfer system is disclosed. The method is based on hybrid inductive and capacitive sensing. The apparatus includes a sensing system, a measurement circuit, and a controller. The sensing system senses the object based on at least one of an inductive or a capacitive effect. The sensing system includes an inductive sense element, which has an electrical characteristic that changes in a presence of the object based on the inductive effect. The sensing system further includes a capacitive sense element, which has an electrical characteristic that changes in the presence of the object based on the capacitive effect. The measurement circuit measures the electrical characteristics in the inductive and capacitive sense circuits. The controller determines the presence of the object, and discriminates between metallic and non-metallic objects based on the change in the measured electrical characteristics.

公开(公告)号：US20230238837A1

公开(公告)日：2023-07-27

申请号：US18127880

申请日：2023-03-29

申请人： Stryker Corporation

发明人： Kevin M. Patmore ,  Christopher Ryan Sweeney ,  Chad Conway Souke ,  Daniel V. Brosnan ,  Kurosh Nahavandi ,  Annie Désaulniers ,  Alexey Titov ,  Jeffrey S. Dunfee, II ,  Aaron D. Furman ,  Krishna S. Bhimavarapu

IPC分类号： H02J50/90 ,  A61G7/08 ,  A61G12/00 ,  A61G7/05 ,  H02S40/22 ,  H02J50/10 ,  H02J50/60 ,  H02J50/40 ,  H02J7/00

CPC分类号： H02J50/90 ,  A61G7/08 ,  A61G12/007 ,  A61G7/0509 ,  H02S40/22 ,  A61G7/05 ,  A61G7/0514 ,  A61G7/0524 ,  A61G12/005 ,  H02J50/10 ,  H02J50/60 ,  H02J50/402 ,  H02J7/0044 ,  H02J50/12

摘要： A power transfer system comprises a patient transport apparatus and a power transfer device. The power transfer system provides convenience and ease of connection between a power source and the patient transport apparatus to provide power to one or more electrically powered devices on the patient transport apparatus or to provide energy for an energy storage device on the patient transport apparatus.

公开(公告)号：US11697351B2

公开(公告)日：2023-07-11

申请号：US17494411

申请日：2021-10-05

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Hiroyuki Matsuo ,  Tetsuro Sawai

IPC分类号： H02J7/00 ,  B60L53/124 ,  H02J50/10 ,  H02J50/60 ,  B60L50/50 ,  H02J50/12 ,  B60M7/00 ,  H02J50/90 ,  H02J50/80

CPC分类号： B60L53/124 ,  B60L50/50 ,  B60M7/00 ,  H02J7/00 ,  H02J50/10 ,  H02J50/12 ,  H02J50/60 ,  H02J50/90 ,  H02J50/80 ,  Y02T10/70

摘要： A power transmitting device includes a power transmitting coil for providing output power to a power receiving coil, a thermal sensor that detects a temperature around the power transmitting coil, and a power transmission control circuit that controls the power transmitting device. The power transmission control circuit causes the power transmitting coil to provide first output power, the power transmitting coil to provide second output power to the power receiving coil for charging a battery connected to the power receiving coil, the thermal sensor to detect the temperature around the power transmitting coil, and, if the detected temperature is equal to or higher than a threshold because of existing a metal foreign object, the power transmitting coil to reduce a level of the output power or stop the output power. The level of the first output power is lower than the level of the second output power

公开(公告)号：US11689064B2

公开(公告)日：2023-06-27

申请号：US17711758

申请日：2022-04-01

申请人： LG ELECTRONICS INC.

发明人： Yongcheol Park

IPC分类号： H02J50/60 ,  H02J50/80 ,  H02J50/12 ,  G06K19/07 ,  H04B1/02 ,  H04B5/00

CPC分类号： H02J50/60 ,  G06K19/07 ,  H02J50/12 ,  H02J50/80 ,  H04B1/02 ,  H04B5/0031 ,  H04B5/0037

摘要： The present invention relates to a wireless power transmitter and method for detecting a RFID/NFC card. Disclosed in the present application is a wireless power receiver comprising: a power pickup unit configured to receive, in a power transfer phase, wireless power generated by magnetic coupling from a wireless power transmitter; and a communications/control unit configured to transfer, in a negotiation phase, a first end-of-power-transfer (EPT) packet to the wireless power transmitter for detecting an RFID/NFC card, and to detect the RFID/NFC card during a re-ping time secured on the basis of the first EPT packet, wherein the first EPT packet instructs requesting the removal of a power signal for a predetermined time. As the process for detecting communication cards, such as RFID or NFC, between the wireless power transmitter and receiver is clearly defined, such RFID/NFC cards can be protected against getting destroyed by the wireless power, and a stable wireless power transfer can be achieved.

公开(公告)号：US11689058B2

公开(公告)日：2023-06-27

申请号：US17195949

申请日：2021-03-09

申请人： NuVolta Technologies (Hefei) Co., Ltd.

发明人： Zhijun Luo ,  Yingying Yang

IPC分类号： H02J50/12 ,  H02J50/60

CPC分类号： H02J50/12 ,  H02J50/60

摘要： A method includes applying an excitation including a voltage step to a resonant tank comprising a first coil and a capacitor, comparing a damped sinusoidal waveform having a resonant attenuation envelope with a predetermined threshold voltage and detecting a last time instant at which a value of the damped sinusoidal waveform is equal to the predetermined threshold voltage, calculating a quality factor of the resonant tank based on a plurality of parameters derived from the last time instant, and determining whether a foreign object is magnetically coupled to the first coil based on the quality factor.

公开(公告)号：US20230198314A1

公开(公告)日：2023-06-22

申请号：US17852249

申请日：2022-06-28

申请人： TOSHIBA TEC KABUSHIKI KAISHA

发明人： Masakazu KATO

IPC分类号： H02J50/60 ,  H02J50/12 ,  H02J50/80 ,  H02J50/00

CPC分类号： H02J50/60 ,  H02J50/005 ,  H02J50/12 ,  H02J50/80

摘要： A non-contact power transmission device includes a power transmission circuit connected to a power transmission coil and configured to transmit power to a power reception coil through the power transmission coil in a non-contact manner, and a control circuit configured to perform first power transmission by which power at a first level is transmitted from the power transmission coil. The control circuit is further configured to perform a foreign object detection by which a foreign object between the power transmission coil and the power reception coil can be detected, and the first power transmission is performed after the foreign object detection if the foreign object is not detected.