Method and apparatus for power transfer for a portable electronic device

• US 9,537,321 B2
• Filed: 02/25/2015
• Issued: 01/03/2017
• Est. Priority Date: 02/25/2015
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Oo, Wei Lun, Lee, Sin Keng, Chong, Chee Khon, Fam, Fook Teng
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Ortiz, Elim
• Application Number:
  US14/631,030
• Publication Number:
  US 20160248265A1
• Time in Patent Office: 678 Days
• Field of Search: 307/104, 320/108
• US Class Current: 1/1
• CPC Class Codes: A41D 1/005 with embedded cable or connector
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/502 the energy repeater being integrated together with the emitter or the receiver
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

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.

Claims

1. A power transfer system, comprising:

a power source having a transmit coil integrated in a vehicle, the power source being driven to transmit a radio frequency (RF) power signal;

a primary repeater coil for receiving the RF power signal via magnetic coupling, the primary repeater coil being attachable to and from a garment so as to align and proximately couple with the transmit coil integrated in the vehicle;

one or more selectable secondary repeater coils for individually coupling to the primary repeater coil via a wired interconnect, the wired interconnect for routing RF power signal from the primary repeater coil to the selected secondary repeater coil, the selected secondary repeater coil being attachable to and detachable from the wired interconnect, each selected secondary repeater coil being alignable via markers on the garment, wherein different markers on the garment are associated with different sized secondary repeater coils of the one or more selectable secondary repeater coils; and

at least one portable electronic device having a receive coil, the receive coil for wirelessly receiving the RF power signal from the selected secondary repeater coil coupled to the wired interconnect.

2. The power transfer system of claim 1, wherein the receive coil powers an element of the at least one portable electronic device.

3. The power transfer system of claim 1, wherein the RF power signal received by the receive coil charges a battery of the at least one portable electronic device.

4. The power transfer system of claim 1, 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.

5. The power transfer system of claim 1, 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 of the one or more selectable secondary repeater coils.

6. The power transfer system of claim 5, each of the plurality of 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.

7. The power transfer system of claim 1, wherein the at least one portable electronic device having the receive coil comprises a remote speaker microphone (RSM).

8. The power transfer system of claim 1, wherein the at least one portable electronic device having the receive coil comprises a sensor, a camera, a BLUETOOH accessory, or a WiFi accessory.

9. A method for power transfer in a portable system, comprising:

aligning a primary repeater coil on a garment using markers on the garment;

attaching the primary repeater coil to the garment;

aligning at least one secondary receiver coil on a garment using indicators on the garment, the indicators being aligned with the primary transmit coil of the garment;

attaching the at least one secondary repeater coil to the garment using the indicators on the garment;

receiving a radio frequency (RF) power signal at the primary repeater coil from an in-vehicle transmit coil aligned with the primary repeater coil located in the garment;

transferring the RF power signal from the primary repeater coil to the 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.

10. The method of claim 9, 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.

11. The method of claim 9, wherein prior to receiving the method further comprises:

powering the in-vehicle transmit coil from an in-vehicle power source to generate the RF power signal.

12. The method of claim 10, wherein:

simultaneously charging a plurality of portable electronic devices using the magnetically coupled transferred power signal received by each respective receive coil.