公开(公告)号：US11159065B2

公开(公告)日：2021-10-26

申请号：US16326883

申请日：2017-09-20

Applicant: Apple Inc.

Inventor： Chad A. Bossetti ,  Christopher S. Graham ,  David W. Ritter ,  Todd K. Moyer ,  Steven G. Herbst ,  Shimon Elkayam ,  Nileshbhai J. Shah ,  Stephen C. Terry ,  Zaki Moussaoui

IPC: H02J50/90 ,  H02J50/10 ,  H02J50/12 ,  H02J50/40 ,  G01D5/16 ,  G01D5/20 ,  G01D5/24 ,  H02J7/02 ,  H01L41/113

Abstract: A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation.

公开(公告)号：US11133696B2

公开(公告)日：2021-09-28

申请号：US16424331

申请日：2019-05-28

Applicant: Apple Inc.

Inventor： Narendra S. Mehta ,  Stephen C. Terry ,  Rohan Dayal

IPC: H02J50/10 ,  H02J7/02 ,  H01F38/14 ,  H01M10/42 ,  H02J50/50

Abstract: A battery case has first and second coils on opposing sides of a battery and has switching circuitry that is coupled between the first and second coils. The battery case has a battery that provides supplemental battery power wirelessly to a wireless power receiving device via the second coil when the switching circuitry is in an open state. The case can also receive power wirelessly with the first coil from a wireless charging mat when the switching circuitry is in the open state. In a closed state, the switching circuitry shorts the first and second coils together so that current flowing through the first coil flows through the second coil in series and so that wireless power from the wireless charging mat that is received with the first coil is transmitted wirelessly to the wireless power receiving device using the second coil.

公开(公告)号：US10978921B1

公开(公告)日：2021-04-13

申请号：US16994308

申请日：2020-08-14

Applicant: Apple Inc.

Inventor： Ge Wang ,  Stephen C. Terry ,  Wynand Malan ,  Zachary S. Harris

IPC: H02J50/80 ,  H02J50/10 ,  H04B5/00

Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. During digital ping operations while the transmitting device and receiving device negotiate to establish a power level to use during normal operation, low-power wireless power signals may be transmitted to the receiving device from the wireless power transmitting device. Information gathered during the digital ping may be evaluated using a wireless-power-transmission-efficiency-to-digital-ping-rectifier-output-voltage relationship and using a normal-operation-wireless-power-transmission-efficiency-to-digital-ping-wireless-power-transmission-efficiency relationship to predict a wireless power transmission efficiency that would be experienced if the system were to enter normal operation. Based on this efficiency prediction, the system can issue alerts and can decide whether or not to enter normal operation.

公开(公告)号：US20200328630A1

公开(公告)日：2020-10-15

申请号：US16748467

申请日：2020-01-21

Applicant: Apple Inc.

Inventor： Weiyun Chen ,  Stephen C. Terry

IPC: H02J50/80 ,  H02J7/02 ,  H02J50/12 ,  H04Q9/00

Abstract: A wireless power receiving device has a coil that receives wireless power signals from a wireless power transmitting device and has a rectifier that produces direct-current power across rectifier output terminals using the received wireless power signals. A load in the wireless power receiving device receives a direct-current output voltage from the rectifier output terminals. In-band communications are supported in which an amplitude-shift keying communications scheme or other communications scheme is used by a data transmitter in the wireless power receiving device to transmit in-band data through the coil. In-band data is transmitted by modulating one or more transistors that are coupled to the coil and other wireless power receiving circuitry in series with one or more capacitors and is transmitted by modulating current flow through a ballast transistor or other adjustable load that is coupled across the rectifier output terminals.

公开(公告)号：US20190074764A1

公开(公告)日：2019-03-07

申请号：US16121205

申请日：2018-09-04

Applicant: Apple Inc.

Inventor： Yongxuan Hu ,  Weiyun Chen ,  Stephen C. Terry ,  Chi Kin Ho ,  Norah E. Nakibuuka

IPC: H02M3/158 ,  H03G3/20

Abstract: This disclosure describes a system and a method to limit (i.e., regulate) the input power of a power converter as a function of the voltage and/or loading condition of a power-limited source such as a battery. In some embodiments, the power converter may comprise a transconductance amplifier that may produce a sink current to a current mirror, which in turn that may provide an adjusted current limit threshold to the power converter. The power converter may utilize the current limit threshold to perform cycle-by-cycle current limiting, thus regulating the input power drawn from the battery.

公开(公告)号：US12230980B1

公开(公告)日：2025-02-18

申请号：US17448155

申请日：2021-09-20

Applicant: Apple Inc.

Inventor： Ye Li ,  Gianpaolo Lisi ,  Bingyao Sun ,  Liang Chen ,  Gaurav Kalra ,  Rohan Dayal ,  Stephen C. Terry

IPC: H02J50/80 ,  H02J50/12

Abstract: A wireless power system can include a wireless power transmitter and a wireless power receiver. The transmitter can include a transmit coil, an inverter, and inverter control circuitry that can operate one or more switching devices of the inverter to communicate information to the receiver by controlling a delay between receipt of the burst request pulse and initiating operation of the inverter and/or controlling a polarity of a first pulse of the inverter. The receiver can include a receive coil magnetically coupled to the transmit coil, a rectifier, and rectifier control circuitry that initiates a burst request pulse to initiate operation of a transmitter. The rectifier control circuitry can operate one or more switching devices of the rectifier to communicate information to the transmitter by at least one of short circuiting an LC tank including the receive coil or controlling a polarity of the burst request pulse.

公开(公告)号：US20240283303A1

公开(公告)日：2024-08-22

申请号：US18638216

申请日：2024-04-17

Applicant: Apple Inc.

Inventor： Chad A. Bossetti ,  Christopher S. Graham ,  David W. Ritter ,  Todd K. Moyer ,  Steven G. Herbst ,  Shimon Elkayam ,  Nileshbhai J. Shah ,  Stephen C. Terry ,  Zaki Moussaoui

IPC: H02J50/90 ,  G01D5/16 ,  G01D5/20 ,  G01D5/24 ,  H02J50/10 ,  H02J50/12 ,  H10N30/30

CPC classification number: H02J50/90 ,  G01D5/16 ,  G01D5/20 ,  G01D5/24 ,  H02J50/10 ,  H02J50/12 ,  H10N30/302

Abstract: A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation.

公开(公告)号：US20240266886A1

公开(公告)日：2024-08-08

申请号：US18638123

申请日：2024-04-17

Applicant: Apple Inc.

Inventor： Adam L. Schwartz ,  Alireza Safaee ,  Stephen C. Terry ,  Zhiyuan Hu

IPC: H02J50/70 ,  H01F27/36 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12 ,  H02J50/60

CPC classification number: H02J50/70 ,  H01F27/36 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12 ,  H02J50/60

Abstract: A wireless charging system having a power transmitter may wirelessly transfer power to a power receiver. Shield saturation, such as saturation of a ferrite structure, in the wireless power receiver may occur under some operating conditions. Saturation can lead to disruptive oscillations in power transfer. The power transmitting may include control circuitry for detecting and mitigating saturation.

公开(公告)号：US11756719B2

公开(公告)日：2023-09-12

申请号：US17484954

申请日：2021-09-24

Applicant: Apple Inc.

Inventor： Narendra S. Mehta ,  Stephen C. Terry ,  Rohan Dayal

IPC: H02J50/10 ,  H02J50/12 ,  H01F27/28 ,  H01F38/14 ,  H01M10/42 ,  H02J50/00 ,  H02J50/50 ,  H02J50/40

CPC classification number: H01F27/28 ,  H01F38/14 ,  H01M10/425 ,  H02J50/005 ,  H02J50/10 ,  H02J50/12 ,  H02J50/502 ,  H02J50/40

Abstract: A battery case has first and second coils on opposing sides of a battery and has switching circuitry that is coupled between the first and second coils. The battery case has a battery that provides supplemental battery power wirelessly to a wireless power receiving device via the second coil when the switching circuitry is in an open state. The case can also receive power wirelessly with the first coil from a wireless charging mat when the switching circuitry is in the open state. In a closed state, the switching circuitry shorts the first and second coils together so that current flowing through the first coil flows through the second coil in series and so that wireless power from the wireless charging mat that is received with the first coil is transmitted wirelessly to the wireless power receiving device using the second coil.

公开(公告)号：US11677255B1

公开(公告)日：2023-06-13

申请号：US17644005

申请日：2021-12-13

Applicant: Apple Inc.

Inventor： Ye Li ,  Antoin J. Russell ,  Stephen C. Terry ,  Adam L. Schwartz ,  Sumant Ranganathan ,  Gianpaolo Lisi

IPC: H02J7/00 ,  H02J50/70 ,  H02J50/80 ,  H02J50/12

CPC classification number: H02J7/00711 ,  H02J50/12 ,  H02J50/70 ,  H02J50/80

Abstract: A wireless power transmitter can include a coil, an inverter coupled to the coil, and control circuitry coupled to the inverter that, responsive to receiving a burst request pulse from a wireless power receiver, initiates inverter operation, driving the coil and powering the receiver. The control circuitry can operate inverter switches so bandwidth of the wireless power transfer signal falls within a specified range by: (a) extending a minimum on time of the switches, (b) modifying pulse width modulation (PWM) drive signals supplied to the switches to shape a coil current burst envelope, and/or (c) modifying PWM signal amplitude supplied to the switches. Modifying the PWM drive signals can include using a symmetrical PWM scheme in which the positive and negative pulses are symmetrical in width on a cycle-by-cycle basis or using a complementary PWM scheme in which the positive and negative pulse widths are complementary on a cycle-by-cycle basis.