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公开(公告)号：US11923696B2
公开(公告)日：2024-03-05
申请号：US17274548
申请日：2020-02-12
Applicant: Google LLC
Inventor： Liang Jia , Srenik Suresh Mehta , Srikanth Lakshmikanthan
CPC classification number: H02J50/50 , H02J7/00047 , H02J50/12 , H02J2310/22
Abstract: This document describes a passive adapter for wireless charging of an electronic device and associated methods and systems. The described passive adapter includes two coils connected by a capacitor and separated by a core material that prevents mutual coupling between the coils. These two coils may have differing sizes, such that one coil can size-match to a transmitter coil of an existing wireless charger and the second coil can size-match to a smaller (or larger) receiver coil in a wireless-power receiver to charge a battery of the wireless-power receiver. In aspects, these two coils may be separated by a distance that enables the passive adapter to act as a passive repeater by bridging a space between the transmitter coil and the receiver coil.
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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：US20230179010A1
公开(公告)日：2023-06-08
申请号：US17997782
申请日：2020-05-04
Applicant: Google LLC
Inventor： Chao Fei , Douglas Osterhout , Srikanth Lakshmikanthan
CPC classification number: H02J7/342 , H02J7/0019 , H02J7/0063 , H02J2207/20 , G06F1/1652
Abstract: In general, techniques are described that are directed to a device having a first power storage device and a second power storage device connected in series. A first power converter may generate, using electrical energy sourced from the first power storage device and the second power storage device, a first power signal to power a first set of components. A second power converter may generate, using electrical energy sourced from the first power storage device and not the second power storage device, a second power signal to power a second set of components.
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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：US20190069246A1
公开(公告)日：2019-02-28
申请号：US15692546
申请日：2017-08-31
Applicant: Google LLC
Inventor： Enrique Romero Pintado , Liang Jia , Srikanth Lakshmikanthan , Eklavya Singh
Abstract: Methods, systems, and devices, including machine-readable media, for dynamic battery power management are disclosed. In some implementations, an electronic device that is powered by a battery senses a voltage provided by the battery and an electric current provided by the battery. The electronic device determines a present state of the battery. The electronic device determines a current limit for the electronic device based on the sensed voltage and electric current and the determined present state of the battery. The electronic device manages power use of the electronic device to maintain electric current draw from the battery at or below the electric current limit.
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Patent Agency Ranking
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：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：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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