Wireless charging coil

• US 9,853,483 B2
• Filed: 05/06/2015
• Issued: 12/26/2017
• Est. Priority Date: 11/25/2013
• Status: Active Grant

• Current Assignee: AK Stamping Company Inc.
• Original Assignee: AK Stamping Company Inc.
• Inventors: Kurz, Arthur, Duetsch, Bernard, Kurz, Joshua
• Primary Examiner(s): NGUYEN, TUYEN T
• Application Number:
  US14/705,398
• Publication Number:
  US 20150244203A1
• Time in Patent Office: 965 Days
• Field of Search: 336 65, 336 83, 336200, 336206-208, 336232
• CPC Class Codes: H01F 27/2847 Sheets; Strips H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/2852 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/2871 Pancake coils
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01F 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor

Abstract

A wireless charging coil is provided herein. More specifically, provided herein is a wireless charging coil comprising a first stamped coil having a first spiral trace, the first spiral trace defining a first space between windings, and a second stamped coil having a second spiral trace, the second spiral trace defining a second space between windings, the first stamped coil and second stamped coil in co-planar relation, the first stamped coil positioned within the second space of the second stamped coil, and the second stamped coil positioned within the first space of the first stamped coil, the first and second coils electronically connected and an adhesive covering and surrounding the first stamped coil and the second stamped coil to bond the coils together and to insulate the coils.

Claims

1. A wireless charging coil comprising:

a first stamped coil having a first spiral trace, the first spiral trace defining a first space between windings;

a second stamped coil having a second spiral trace, the second spiral trace defining a second space between windings,

the first stamped coil and second stamped coil in co-planar relation, the first stamped coil positioned within the second space of the second stamped coil, and the second stamped coil positioned within the first space of the first stamped coil, the first and second coils electronically connected;

a first laminate attached to the first stamped coil and fixing the first stamped coil in place; and

a second laminate attached to the second stamped coil and fixing the second stamped coil in place,

the first laminate being engaged with the second laminate to bond the coils together and to insulate the coils.

2. The wireless charging coil of claim 1, wherein the first stamped coil and the second stamped coil are positioned between the first laminate and the second laminate.

3. The wireless charging coil of claim 1, wherein the first stamped coil and second stamped coil are connected in series.

4. The wireless charging coil of claim 1, wherein the first stamped coil and second stamped coil are connected in parallel.

5. The wireless charging coil of claim 1, wherein the first stamped coil includes an inside end and an outside end, the inside end disposed on the same side of the first stamped coil as the outside end.

6. The wireless charging coil of claim 5, further comprising a first jumper attached to the outside end of the first coil.

7. The wireless charging coil of claim 6, wherein the second stamped coil includes an inside end and an outside end, and further comprising a second jumper attached to the inside end of the first coil and the outside end of the second coil.

8. The wireless charging coil of claim 7, further comprising a third jumper attached to the inside end of the second coil.