Method and shielding units for inductive energy coils

• US 9,861,017 B2
• Filed: 01/16/2012
• Issued: 01/02/2018
• Est. Priority Date: 01/16/2012
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Technologies Oy (Nokia Corporation)
• Inventors: Borngrber, Frank
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Htun, Win
• Application Number:
  US14/370,834
• Publication Number:
  US 20150022020A1
• Time in Patent Office: 2,178 Days
• Field of Search: 307104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H05K 9/0007 Casings standardised racks H05K9/0062

Abstract

The invention relates to protecting metals and components from inductive energy. The protecting apparatus comprises an inductive energy coil (51), a first shielding unit comprising an opening (58) around the inductive energy coil (51) wherein the first shielding unit (54) is located in parallel to inductive energy coil (51); and a second shielding unit (53) under the inductive energy coil (51) so that the inductive energy coil (51) is enabled for electromagnetic radiation. The invention further relates to a method for producing the protecting apparatus and an electronic device comprising the protecting apparatus.

Claims

1. An apparatus comprising:

an inductive energy coil configured for inductive energy transfer;

a first shielding unit comprising an opening through the first shielding unit, wherein the first shielding unit is located in parallel to the inductive energy coil, and wherein the opening through the first shielding unit is arranged to be located so that the opening at least partially reveals the inductive energy coil electromagnetic radiation wherein a transmission or reception of the inductive energy coil electromagnetic radiation is enabled through the opening and is blocked by portions of the first shielding unit surrounding the opening, said opening allowing the electromagnetic radiation to be transmitted to or received from another inductive energy device; and

a second shielding unit, wherein the second shielding unit is located in parallel to the inductive energy coil so that the inductive energy coil is enabled for transmission or reception of electromagnetic radiation.

2. The apparatus according to claim 1, wherein the inductive energy coil is an inductive energy receiver coil.

3. The apparatus according to claim 1, wherein the inductive energy coil is an inductive energy transmitter coil.

4. The apparatus according to claim 1, wherein the inductive energy coil is an inductive energy transceiver coil.

5. The apparatus according to claim 1, wherein the first shielding unit comprises a plurality of openings.

6. The apparatus according to claim 1, wherein the apparatus further comprises at least one further shielding unit with at least one opening, wherein the at least one further shielding unit is in parallel to the first shielding unit.

7. The apparatus according to claim 1, wherein the first shielding unit is in-molded into a cover of a device.

8. The apparatus according to claim 1, wherein the first shielding unit is attached to a cover of a device.

9. The apparatus according to claim 8, wherein the first shielding unit is attached to a back side of the cover of the device.

10. The apparatus according to claim 8, wherein the first shielding unit is attached to a front side of the cover of the device.

11. The apparatus according to claim 1, wherein the apparatus is a part of an electronic device.

12. A method comprising:

locating, by an apparatus, a first shielding unit comprising an opening through the first shielding unit in parallel to an inductive energy coil, and wherein the opening through the first shielding unit is arranged to be located so that the opening at least partially reveals the inductive energy coil for electromagnetic radiation, wherein a transmission or reception of the inductive energy coil electromagnetic radiation is enabled through the opening and is blocked by portions of the first shielding unit surrounding the opening, said opening allowing the electromagnetic radiation to be transmitted to or received from another inductive energy device, and

locating, by the apparatus, a second shielding unit in parallel to the inductive energy coil so that the inductive energy coil is enabled for a transmission or reception of electromagnetic radiation.

13. The method according to claim 12, wherein the inductive energy coil is an inductive energy receiver coil.

14. The method according to claim 12, wherein the inductive energy coil is an inductive energy transmitter coil.

15. The method according to claim 12, wherein the inductive energy coil is an inductive energy transceiver coil.

16. The method according to claim 12, wherein the first shielding unit has a plurality of openings.

17. The method according to claim 12, wherein the method further comprises locating, by the apparatus, at least one further shielding unit with at least one opening in parallel to the first shielding unit.

18. The method according to claim 12, wherein the method comprises in-molding, by the apparatus, the first shielding unit into a cover of a device.

19. The method according to claim 12, wherein the method comprises attaching, by the apparatus, the first shielding unit to a cover of a device.

20. The method according to claim 19, wherein the method comprises attaching, by the apparatus, the first shielding unit to a back side of the cover of the device.