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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：US11923706B2
公开(公告)日：2024-03-05
申请号：US17281524
申请日：2019-12-13
Applicant: Google LLC
Inventor： Liang Jia
IPC: H02J7/00
CPC classification number: H02J7/0024 , H02J7/0016 , H02J7/0019 , H02J7/0029
Abstract: This disclosure describes apparatuses and techniques for a switched multi-cell battery system for electronic devices. In some aspects, a switched multi-cell battery system may transfer, via a plurality of power control switches electrical power from a power adapter to components of the electronic device by charging battery cells in series and by discharging the battery cells in parallel or as a single battery cell. As a result, the switched multi-cell battery system may reduce or eliminate a voltage step-down conversion stage to increase a power-transfer efficiency of an electronic device. By doing so, charging times may be reduced or operating times may be increased, thereby improving users' experience with their electronic devices.
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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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Patent Agency Ranking
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：US20240162726A1
公开(公告)日：2024-05-16
申请号：US18420318
申请日：2024-01-23
Applicant: Google LLC
Inventor： Liang Jia
IPC: H02J7/00
CPC classification number: H02J7/0024 , H02J7/0016 , H02J7/0019 , H02J7/0029
Abstract: This disclosure describes apparatuses and techniques for a switched multi-cell battery system for electronic devices. In some aspects, a switched multi-cell battery system may transfer, via a plurality of power control switches electrical power from a power adapter to components of the electronic device by charging battery cells in series and by discharging the battery cells in parallel or as a single battery cell. As a result, the switched multi-cell battery system may reduce or eliminate a voltage step-down conversion stage to increase a power-transfer efficiency of an electronic device. By doing so, charging times may be reduced or operating times may be increased, thereby improving users' experience with their electronic devices.
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公开(公告)号：US11876576B2
公开(公告)日：2024-01-16
申请号：US17746011
申请日：2022-05-17
Applicant: Google LLC
Inventor： Liang Jia , Jae-Won Hwang
CPC classification number: H04B5/0037 , H02J7/00032 , H02J7/02 , H02J50/12 , H02J50/80 , H04B5/0081
Abstract: The technology provides for a wearable device including a body and an accessory adapted to be attached to the body. The body includes a first coil configured to inductively transmit power. The body may further include first power management circuitry configured to control the first coil to transmit power according to a wireless charging standard, and to modulate the power transmitted through the first coil to transmit data according to a wireless communication standard. The accessory may include a second coil configured to inductively receive power. The accessory may further include second power management circuitry configured to control the second coil to receive the power transmitted through the first coil according to the wireless charging standard, and to control the second coil to receive the data transmitted through the first coil according to the wireless communication standard.
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公开(公告)号：US20190281556A1
公开(公告)日：2019-09-12
申请号：US16351639
申请日：2019-03-13
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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公开(公告)号：US10381822B2
公开(公告)日：2019-08-13
申请号：US15375833
申请日：2016-12-12
Applicant: Google LLC
Abstract: A protection circuits for server racks may include an Oring circuit having a first MOSFET, a first diode, and first and second comparators. Each of the first and second comparators supports a maximum voltage difference that is less than an operational voltage of the power supply. The protection circuit also includes a clamping circuit having a second MOSFET and a second diode. Each of the first and second comparators is configured to compare voltage at the first MOSFET with voltage at the second MOSFET. The first comparator is configured to switch the first MOSFET to an off condition using the comparison, and the second comparator is configured to switch the first MOSFET to an on condition using the comparison. The second MOSFET is configured to clamp a node of each of the first and second comparators to below the maximum in the event of a short at the power supply.
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