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公开(公告)号：US11916478B2
公开(公告)日：2024-02-27
申请号：US17425375
申请日：2020-08-31
Applicant: Google LLC
Inventor： Chao Fei , Douglas Osterhout , Srikanth Lakshmikanthan , Liang Jia , Li Wang
CPC classification number: H02M3/156 , H02J7/00308 , H02J7/00716 , H02J7/342
Abstract: In general, techniques are described that are directed to a device that includes a power storage device, an electrical load, and a first regulated power converter including components configured to generate, during a first time period and using electrical energy received from a power source external to the device, a first power signal to charge the power storage device. A second regulated power converter includes components configured to determine a charging current at which to charge the power storage device, determine a total amount of current flowing to the power storage device that includes current sourced by the second power converter less current sinked by the electrical load, and generate, during a second time period that is non-overlapping with the first time period, using electrical energy from the power source and based on determined the total amount of current, a second power signal to charge the power storage device.
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公开(公告)号：US20220302734A1
公开(公告)日：2022-09-22
申请号：US17425375
申请日：2020-08-31
Applicant: Google LLC
Inventor： Chao Fei , Douglas Osterhout , Srikanth Lakshmikanthan , Liang Jia , Li Wang
Abstract: In general, techniques are described that are directed to a device that includes a power storage device, an electrical load, and a first regulated power converter including components configured to generate, during a first time period and using electrical energy received from a power source external to the device, a first power signal to charge the power storage device. A second regulated power converter includes components configured to determine a charging current at which to charge the power storage device, determine a total amount of current flowing to the power storage device that includes current sourced by the second power converter less current sinked by the electrical load, and generate, during a second time period that is non-overlapping with the first time period, using electrical energy from the power source and based on determined the total amount of current, a second power signal to charge the power storage device.
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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：US20240235262A9
公开(公告)日：2024-07-11
申请号：US18546120
申请日：2021-02-23
Applicant: Google LLC
CPC classification number: H02J50/10 , H02J50/402 , H02M7/219
Abstract: An example device (204) includes a wireless charging receive coil (222) configured to transduce, into an alternating current—AC—power signal, a magnetic field generated by a wireless charging transmit coil (218) of an external device (202); an active rectifier (224) configured to convert the AC signal into a direct current—DC—power signal; and circuitry (226) configured to: obtain a target level of the DC power signal; and control the active rectifier (224) to output the DC power signal with the target level.
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Patent Agency Ranking
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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公开(公告)号：US20240223012A1
公开(公告)日：2024-07-04
申请号：US17996736
申请日：2021-08-10
Applicant: Google LLC
Inventor： Li Wang , Liang Jia , Liyu Yang , Stefano Saggini
CPC classification number: H02J50/12 , H02J50/402
Abstract: An example device includes a plurality of capacitor and wireless charging coil series pairs that are collectively in parallel; and one or both of: a driver circuit configured to drive the plurality of capacitor and wireless charging coil series pairs with a first common signal; or a sink circuit configured to receive a second common signal from the plurality of capacitor and wireless charging coil series pairs.
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公开(公告)号：US20240136857A1
公开(公告)日：2024-04-25
申请号：US18546120
申请日：2021-02-23
Applicant: Google LLC
CPC classification number: H02J50/10 , H02J50/402 , H02M7/219
Abstract: An example device (204) includes a wireless charging receive coil (222) configured to transduce, into an alternating current—AC—power signal, a magnetic field generated by a wireless charging transmit coil (218) of an external device (202); an active rectifier (224) configured to convert the AC signal into a direct current—DC—power signal; and circuitry (226) configured to: obtain a target level of the DC power signal; and control the active rectifier (224) to output the DC power signal with the target level.
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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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公开(公告)号：US20210367342A1
公开(公告)日：2021-11-25
申请号：US17397167
申请日：2021-08-09
Applicant: Google LLC
Inventor： Hung-Chi Chiu , Wei-Yang Wu , Che-Ting Yeh , Li Wang
Abstract: An optimized near-field communication (NFC) antenna structure for reduced coupling with a wireless charging (WLC) coil of a computing device includes the WLC coil and an NFC coil that at least partially overlaps the WLC coil. The NFC coil of the optimized structure may include two sections that partially overlap the WLC coil and meet, over the WLC coil, at an angle to reduce coupling between the WLC coil and the NFC coil. The angled shape of the NFC coil may be implemented in various shapes resulting in one or more angles such that the first and second sections of the NFC coil are angled with respect to one another over the WLC coil. The combination or shape of the angles of the NFC coil, as well as NFC coil position relative to the WLC coil, may be optimized to reduce coupling between the NFC coil and the WLC coil.
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