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公开(公告)号：US11881730B2
公开(公告)日：2024-01-23
申请号：US16975350
申请日：2019-09-06
Applicant: Google LLC
Inventor： Veera Venkata Siva Nagesh Polu , Liang Jia , Srikanth Lakshmikanthan
CPC classification number: H02J50/90 , H02J7/0013 , H02J50/12 , H02J50/40
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for wireless charging using time-division multiplexing. In some implementations, a wireless charger is configured to concurrently charge multiple devices by providing power wirelessly to individual devices in different time periods. The wireless charger can perform time-division multiplexing by selectively directing the output of a single driver circuit to different power transfer coil segments at different times. The wireless charging sessions of multiple devices can be maintained by repeating a pattern of activating different power transfer coil segments one by one in successive time periods.
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公开(公告)号：US11171522B2
公开(公告)日：2021-11-09
申请号：US16393526
申请日：2019-04-24
Applicant: Google LLC
Inventor： Liang Jia , Qi Tian , Liyu Yang , Veera Venkata Siva Nagesh Polu , Srikanth Lakshmikanthan , Rahul Apte , Jae-won Hwang , Srenik Suresh Mehta
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for improving wireless charging. In some implementations, an electronic device determines a power demand of the electronic device. The electronic device includes a wireless power receiver including a wireless power receiving coil configured to receive power through inductive coupling with a wireless charge. The electronic device determines an operating voltage or operating frequency for the wireless charger based on the power demand of the electronic device. The electronic device sends, to the wireless charger, data indicating the operating voltage or operating frequency for the wireless charger.
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公开(公告)号：US20240128805A1
公开(公告)日：2024-04-18
申请号：US18390218
申请日：2023-12-20
Applicant: Google LLC
Inventor： Veera Venkata Siva Nagesh Polu , Liang Jia , Srikanth Lakshmikanthan
CPC classification number: H02J50/90 , H02J7/0013 , H02J50/12 , H02J50/40
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for wireless charging using time-division multiplexing. In some implementations, a wireless charger is configured to concurrently charge multiple devices by providing power wirelessly to individual devices in different time periods. The wireless charger can perform time-division multiplexing by selectively directing the output of a single driver circuit to different power transfer coil segments at different times. The wireless charging sessions of multiple devices can be maintained by repeating a pattern of activating different power transfer coil segments one by one in successive time periods.
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公开(公告)号：US20220139615A1
公开(公告)日：2022-05-05
申请号：US17176685
申请日：2021-02-16
Applicant: Google LLC
Inventor： Liyu Yang , Liang Jia , Srikanth Lakshmikanthan , Li Wang , Qi Tian , YungChih Chen , Veera Venkata Siva Nagesh Polu , Stefano Saggini , Mario Ursino , Ruben Specogna
Abstract: This document describes techniques and apparatuses directed at reducing inductive-charging power loss. In aspects, a mobile device includes a multi-layer flexible printed circuit board (FPCB) coil that forms a receiver coil having a Litz-wire structure. The FPCB coil includes a multi-trace bundle, having traces systematically routed throughout the different layers of the FPCB coil to reduce eddy current losses.
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公开(公告)号：US20240371565A1
公开(公告)日：2024-11-07
申请号：US18742738
申请日：2024-06-13
Applicant: Google LLC
Inventor： Li Wang , Liyu Yang , Stefano Saggini , Liang Jia , Yanchao Li , Zhenxue Xu , Haoquan Zhang , Mauricio Antonio Alvarado Ortega , Giulia Segatti , Pingsheng Wu , Srikanth Lakshmikanthan , Qi Tian , Veera Venkata Siva Nagesh Polu , Yung-Chih Chen , Yi Lin Chen , Wei Chen Tu
Abstract: A wireless charging receiver that includes a first coil, a second coil, and a nanocrystalline sheet is disclosed. The first coil is configured to be located within a recess in the nanocrystalline sheet and is positioned between the second coil and the nanocrystalline sheet. The first coil includes first and second terminals and the second coil includes third and fourth terminals. The first terminal is connected to the third terminal and the second terminal is connected to the fourth terminal to electrically connect the first coil to the second coil. The first coil may be formed of a flexible printed circuit board having a continuous trace or may be formed of litz wire. The first coil may be a hybrid coil with a first portion formed of a flexible printed circuit board having a continuous trace and with a second portion formed of litz wire.
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Patent Agency Ranking
公开(公告)号：US20200343777A1
公开(公告)日：2020-10-29
申请号：US16393526
申请日：2019-04-24
Applicant: Google LLC
Inventor： Liang Jia , Qi Tian , Liyu Yang , Veera Venkata Siva Nagesh Polu , Srikanth Lakshmikanthan , Rahul Apte , Jae-won Hwang , Srenik Suresh Mehta
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for improving wireless charging. In some implementations, an electronic device determines a power demand of the electronic device. The electronic device includes a wireless power receiver including a wireless power receiving coil configured to receive power through inductive coupling with a wireless charge. The electronic device determines an operating voltage or operating frequency for the wireless charger based on the power demand of the electronic device. The electronic device sends, to the wireless charger, data indicating the operating voltage or operating frequency for the wireless charger.
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公开(公告)号：US20200083754A1
公开(公告)日：2020-03-12
申请号：US16125328
申请日：2018-09-07
Applicant: Google LLC
Inventor： Qi Tian , Veera Venkata Siva Nagesh Polu , Liang Jia , Liyu Yang , Jae-won Hwang , Rahul Apte , Srikanth Lakshmikanthan , Srenik Suresh Mehta , Robert Thomas Shone
Abstract: Methods, systems, and techniques for safely controlling wireless charging in the presence of a foreign object are presented. A method includes determining a power difference between a power transmitted by a wireless charger and a power received by an electronic device, determining a level of misalignment of the electronic device with respect to the wireless charger; estimating an amount of power difference due to the level of misalignment of the electronic device with respect to the wireless charger, adjusting a power difference threshold for the wireless charger based on the estimated amount of power difference, and controlling operation of the wireless charger based on the power difference and the adjusted power difference threshold.
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公开(公告)号：US20250103116A1
公开(公告)日：2025-03-27
申请号：US18294508
申请日：2021-11-04
Applicant: Google LLC
Inventor： Michael J. Lombardi , Joe Allore , Jae-Won Hwang , Mark Mienko , Veera Venkata Siva Nagesh Polu
Abstract: An example mobile computing device includes a display; a battery; a wireless charging coil positioned to wirelessly transmit or receive electrical energy through the display; and circuitry configured to charge the battery using electrical energy received via the wireless charging coil.
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公开(公告)号：US20230208191A1
公开(公告)日：2023-06-29
申请号：US17998471
申请日：2020-12-30
Applicant: Google LLC
Inventor： Mojan Sohi , Veera Venkata Siva Nagesh Polu , Igor Markovsky
CPC classification number: H02J50/005 , H02J50/80 , H02J50/70
Abstract: An example mobile computing device includes at least one processor, a battery, and a device enclosure. The device enclosure at least partially encloses the mobile computing device. At least one portion of the device enclosure comprises at least one first element, a region that is at least partially formed in and at least partially surrounded by the at least one first element, at least one insulative element formed in the region, wherein the at least one insulative element includes at least one electrically insulative material, and a wireless charging module included in the region. The wireless charging module is configured to wirelessly communicate with an external charging device to induce a current in the wireless charging unit, and wherein the current is used to charge the battery of the mobile computing device.
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公开(公告)号：US11417461B2
公开(公告)日：2022-08-16
申请号：US17176685
申请日：2021-02-16
Applicant: Google LLC
Inventor： Liyu Yang , Liang Jia , Srikanth Lakshmikanthan , Li Wang , Qi Tian , YungChih Chen , Veera Venkata Siva Nagesh Polu , Stefano Saggini , Mario Ursino , Ruben Specogna
Abstract: This document describes techniques and apparatuses directed at reducing inductive-charging power loss. In aspects, a mobile device includes a multi-layer flexible printed circuit board (FPCB) coil that forms a receiver coil having a Litz-wire structure. The FPCB coil includes a multi-trace bundle, having traces systematically routed throughout the different layers of the FPCB coil to reduce eddy current losses.
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