Method and apparatus for power transfer for a portable electronic device

Patent metadata

Field	Value
Publication number	US-2016248265-A1
Application number	US-201514631030-A
Country	US
Kind code	A1
Filing date	Feb 25, 2015
Priority date	Feb 25, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

A power transfer interface ( 120 ) is formed of a primary repeater coil ( 104 ) and one or more secondary repeater coils ( 106 ) coupled via a wired interconnect ( 110 ), and integrated within a garment ( 114 ). The repeater coils operate as part of a wireless charging or powering system in which a transmit coil ( 102 ), located in a vehicle or a radio, is driven to magnetically couple a wireless radio frequency (RF) power signal to the primary repeater coil ( 104 ) which in turn transfers the RF power signal to the secondary repeater coil ( 106 ) via the wired interconnect ( 110 ). The system further comprises a portable electronic device ( 220 ) having a receive coil ( 108 ). The receive coil ( 108 ) wirelessly receives the RF power signal from the secondary repeater coil ( 106 ), which can in turn be used to power the portable device or charge a battery of the portable device.

First claim

1 . A power transfer apparatus, comprising:
a garment; a primary repeater coil integrated within the garment; and at least one secondary repeater coil integrated within the garment and coupled to the primary repeater coil via a wired interconnect.

2 . The power transfer apparatus of claim 1 , the primary repeater coil for receiving a magnetically coupled wireless radio frequency (RF) power signal.

3 . The power transfer apparatus of claim 2 , the primary repeater coil for transferring the RF power signal to the at least one secondary repeater coil over the wired interconnect.

4 . The power transfer apparatus of claim 3 , wherein the at least one secondary repeater coil wirelessly transfers the RF power signal to a receive coil of a portable electronic device.

5 . The power transfer apparatus of claim 1 , wherein the at least one secondary repeater coil comprises a plurality of secondary repeater coils wired to the primary repeater coil.

6 . The power transfer apparatus of claim 1 , wherein the at least one secondary repeater coil is positioned within the garment to align and proximately couple with respective receive coils of body worn portable electronic devices.

7 . The power transfer apparatus of claim 1 , wherein the primary repeater coil is positioned within the garment to align and proximately couple with a transmit coil integrated in a vehicle.

8 . The power transfer apparatus of claim 1 , wherein the primary repeater coil is positioned within the garment to align and proximately couple with a transmit coil integrated in a body-worn portable radio.

9 . A power transfer system, comprising:
a power source having a transmit coil which is driven to transmit a radio frequency (RF) power signal; a primary repeater coil for receiving the RF power signal via magnetic coupling; a secondary repeater coil coupled to the primary repeater coil via a wired interconnect, the wired interconnect for routing RF power signal from the primary repeater coil to the secondary repeater coil; and at least one portable electronic device having a receive coil, the receive coil for wirelessly receiving the RF power signal from the secondary repeater coil.

10 . The power transfer system of claim 9 , wherein the receive coil powers an element of the at least one portable electronic device.

11 . The power transfer system of claim 9 , wherein the RF power signal received by the receive coil charges a battery of the at least one portable electronic device.

12 . The power transfers system of claim 9 , wherein the transmit coil is integrated within a portion of a vehicle, and the power source comprises an in-vehicle power source.

13 . The power transfer system of claim 9 , wherein the power source comprises a portable radio having a transmit coil, the transmit coil magnetically coupling the RF power signal to the primary repeater coil.

12 . The power transfer system of claim 9 , wherein the primary repeater coil and the secondary repeater coil are integrated within a garment.

13 . The power transfer system of claim 9 , wherein:
the primary repeater coil aligns and proximately couples with the transmit coil; and the primary repeater coil is wired to a plurality of secondary repeater coils.

14 . The power transfer system of claim 13 , each of the plurality of secondary repeater coils for aligning and proximately coupling with a respective receive coil of each of the at least one portable electronic device.

15 . The power transfer system of claim 9 , wherein the at least one portable electronic device having the receive coil comprises a remote speaker microphone (RSM).

16 . The power transfer system of claim 9 , wherein the at least one portable electronic device having the receive coil comprises a sensor, a camera, a BLUETOOTH accessory, or a WiFi accessory.

17 . A method for power transfer in a portable system, comprising:
receiving a radio frequency (RF) power signal at a primary repeater coil; transferring the RF power signal from the primary repeater coil to at least one secondary repeater coil over a wired interconnect; and magnetically coupling the transferred RF power signal from the at least one secondary repeater coil to at least one portable electronic device having a receive coil.

18 . The method of claim 17 , wherein receiving the radio frequency (RF) power signal at the primary repeater coil further comprises:
magnetically coupling the RF power signal from a transmit coil to the primary repeater coil.

19 . The method of claim 17 , wherein prior to receiving the method further comprises:
powering an in-vehicle transmit coil from an in-vehicle power source to generate the RF power signal.

20 . The method of claim 17 , wherein prior to receiving the method further comprises:
powering an in-radio transmit coil from a portable radio power source to generate the radio frequency (RF) power signal.

21 . (canceled)

22 . (canceled)

23 . (canceled)

Assignees

• Motorola Solutions Inc

Inventors

• Oo Wei Lun
• Chong Chee Khon
• Fam Fook Teng
• Lee Sin Keng

Classifications

• H02J7/70 Primary

  characterised by the mechanical construction · CPC title

• H02J50/20

  using microwaves or radio frequency waves · CPC title

• A41D1/005

  with embedded cable or connector · CPC title

• H02J7/025

  Electricity · mapped topic

• H02J5/005 Primary

  Electricity · mapped topic