公开(公告)号：US20230080598A1

公开(公告)日：2023-03-16

申请号：US17824480

申请日：2022-05-25

Applicant: Apple Inc.

Inventor： Eric X. Zhou ,  Muhammad H. Kiani ,  Rohan Dayal ,  Ye Li

IPC: H02J7/00 ,  H02J50/10 ,  H02J50/70 ,  H02J50/90

Abstract: Accessory cases that can be charged using one or more types of wireless chargers. An example can provide an accessory case having a first alignment feature for aligning to a first type of wireless charger. The first alignment feature can include one or more magnetic elements in the accessory case. The one or more magnetic elements can be located in both the base and the lid of the accessory case. Another example can further include a second alignment feature for aligning to a second type of wireless charger. The second alignment feature can include one or more magnetic elements in the accessory case.

公开(公告)号：US20220014046A1

公开(公告)日：2022-01-13

申请号：US17484954

申请日：2021-09-24

Applicant: Apple Inc.

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

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

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：US11121573B1

公开(公告)日：2021-09-14

申请号：US15476652

申请日：2017-03-31

Applicant: Apple Inc.

Inventor： InHwan Oh ,  Zaki Moussaoui ,  Rohan Dayal ,  Bharat K. Patel ,  Manisha P. Pandya ,  Weihong Qiu ,  Malhar V. Bhatt

IPC: H02J7/02 ,  H02J50/12 ,  H02J50/90

Abstract: A power converter can be implemented as a series of power conversion stages, including a wireless power conversion stage. In typical embodiments, the power converter receives power directly from mains voltage and outputs power to a battery within an electronic device. A transmitter side of the power converter converts alternating current received from a power source (e.g., mains voltage) to an alternating current suitable for applying to a primary coil of the wireless power conversion stage of the power converter.

公开(公告)号：US20200227935A1

公开(公告)日：2020-07-16

申请号：US16424331

申请日：2019-05-28

Applicant: Apple Inc.

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

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

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：US10608468B2

公开(公告)日：2020-03-31

申请号：US15611622

申请日：2017-06-01

Applicant: Apple Inc.

Inventor： Rohan Dayal ,  Weihong Qiu ,  Zaki Moussaoui

IPC: H02J50/10 ,  H02J50/80 ,  H02J7/02 ,  H04B1/3827

Abstract: A wireless power transmitting device may have control circuitry that supplies drive signals to a coil to produce wireless power signals. The wireless power receiving device may have a coil that receives the transmitted wireless power signals from the wireless power transmitting device. The wireless power receiving device may have a rectifier that rectifies signals received by the coil in the wireless power receiving device and that provides a rectified voltage to a capacitor. A charger in the wireless power receiving device may charge a battery in the device using the rectified voltage. When it is desired to convey information to the wireless power transmitting device, the wireless power transmitting device may cease the transmission of wireless power and the wireless power receiving device may modulate transistors in the rectifier to transmit data to the wireless power transmitting device.

公开(公告)号：US10483786B2

公开(公告)日：2019-11-19

申请号：US15473453

申请日：2017-03-29

Applicant: Apple Inc.

Inventor： Zaki Moussaoui ,  Rohan Dayal ,  Weihong Qiu

IPC: H02J50/40 ,  H02J7/02 ,  H02J7/34

Abstract: A wireless power transmitting device may have an array of transmitting coils to transmit power wirelessly to a wireless power receiving device having an array of wireless power receiving coils. The receiving device may have a rectifier that receives alternating-current signals from the wireless power receiving coils and provides corresponding rectified direct-current voltage signals to a capacitor and other circuitry. The rectifier circuitry may include bridge circuits each of which is coupled between a respective coil in the array of wireless power receiving coils and the capacitor. The wireless power transmitting coils may be arranged in a hexagonally tiled array. The wireless power receiving coils may include first, second, and third coils that are aligned with respective vertices in an equilateral triangle having sides with lengths equal to half of the center-to-center spacing of the hexagonally tiled transmitting coils.

公开(公告)号：US20190067978A1

公开(公告)日：2019-02-28

申请号：US15868877

申请日：2018-01-11

Applicant: Apple Inc.

Inventor： Nan Liu ,  Rohan Dayal ,  Weihong Qiu ,  Zaki Moussaoui

IPC: H02J7/02 ,  H02J50/12 ,  H02J5/00 ,  H01F38/14

Abstract: A wireless power system may use a wireless power transmitting device to transmit wireless power to a wireless power receiving device. The wireless power transmitting device may have an array of coils that extend under a wireless charging surface. Control circuitry may supply alternating-current control signals to inverters. The inverters are coupled to resonant circuits. Each resonant circuit includes a capacitor coupled to a respective one of the coils. During operation, wireless power signals are transmitted from the coils to the wireless power receiving device through the charging surface. The capacitor associated with each resonant circuit may potentially be individually selected to enhanced uniformity of the wireless power transmitting device. The array of coils may have multiple layers and the capacitors in each layer may have different respective values.

公开(公告)号：US20180294742A1

公开(公告)日：2018-10-11

申请号：US15829610

申请日：2017-12-01

Applicant: Apple Inc.

Inventor： Weihong Qiu ,  Rohan Dayal ,  Zaki Moussaoui

IPC: H02M7/537 ,  H02J50/12 ,  H01F38/14

CPC classification number: H02M7/537 ,  H01F38/14 ,  H02J50/12 ,  H02M2007/4815

Abstract: A power converter can be implemented with a boosted-output inverter, which integrates the functionality of a voltage converter (e.g., boost converter) and a voltage inverter. In particular, a boosted-output inverter includes a primary tank inductor coupled in series with a secondary tank inductor at a central node. The boosted-output inverter also includes two voltage-controlled switches that respectively define a charging phase and a discharging phase of the primary tank inductor. While the primary tank inductor is charging, the secondary tank inductor is inverted to ground. In this manner, current though the secondary tank inductor alternates at a voltage boosted by the fly-back voltage of the primary tank inductor exhibited when the primary tank inductor transitions from the charging mode to the discharging mode. In many cases, the secondary tank inductor is a transmit coil of a transmitter of a wireless power transfer system.

公开(公告)号：US10075055B2

公开(公告)日：2018-09-11

申请号：US15064501

申请日：2016-03-08

Applicant: Apple Inc.

Inventor： Weihong Qiu ,  Rohan Dayal ,  Zaki Moussaoui

IPC: H02M1/08 ,  H02M3/335 ,  H02M3/337 ,  H02M1/00

CPC classification number: H02M1/083 ,  H02M3/33569 ,  H02M3/3376 ,  H02M2001/0032 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02B70/16

Abstract: This disclosure relates to improved designs for phase-shift power converters, and, in particular, full bridge converters. Phase-shift power converters may lose Zero-Voltage-Switching (ZVS) under some load conditions, e.g., light load conditions—which can result in large switching losses. In order to avoid these losses, additional LC tank circuits may be added into the system to generate an amount of negative current needed to maintain ZVS. However, permanently adding such LC tank circuits into the system will reduce the system's efficiency. By intelligently adjusting the number (and particular combination) of LC tank circuits included in the system at a given time, ZVS may be maintained under all load conditions, while the impact of the additional LC tank circuits on the converter's overall efficiency may be limited, e.g., by employing the minimum number of LC tank circuits for the minimum amount of time needed to maintain ZVS.