LOW MAGNETIC INTERFERENCE BATTERY AND MOBILE COMMUNICATION DEVICE

• US 20110014942A1
• Filed: 07/14/2009
• Published: 01/20/2011
• Est. Priority Date: 07/14/2009
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Brubacher, Jonathan Quinn, Boda, Mallikarjun, VAN SCHYNDEL, Andre John, Hawker, Larry Edward
• Granted Patent: US 8,357,460 B2
• Time in Patent Office: Days
• US Class Current: 455/550.1
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 50/00 Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: H04M 1/0262 for a battery compartment
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A communication device, and battery there for, are provided. In at least one of the battery and the communication device is provided a magnetic shield portion for routing magnetic flux away from the receiver when the radio is in operation. The magnetic shield portion can be incorporated into at least one of the battery and the communication device. When the battery is inserted into mobile communications devicemobile communication device, the magnetic shield portion is located substantially between a battery portion, in the battery, and the receiver.

Claims

1. A battery, insertable into a mobile communication device, said mobile communication device comprising a radio interconnected with a microphone and a receiver, said battery comprising:

a battery portion enabled to provide electrical power to said radio, said battery portion emitting a magnetic field when in operation; and

a magnetic shield portion arranged relative to said battery portion such that magnetic flux from said battery portion is routed away from said receiver when said battery is in operation in said mobile communication device.

2. The battery of claim 1, wherein said magnetic shield portion is substantially planar.

3. The battery of claim 1, wherein said magnetic shield portion is substantially parallel to a side of said battery portion which, when inserted into said mobile communication device, is oriented towards said receiver.

4. The battery of claim 1, wherein when said battery is inserted into mobile communication device, said magnetic shield portion is located substantially between said battery portion and said receiver.

5. The battery of claim 1, wherein said magnetic shield portion substantially encompasses said battery portion.

6. The battery of claim 5, wherein said magnetic shield portion further comprises apertures for contacting said battery portion.

7. The battery of claim 1, wherein said magnetic shield portion comprises a high magnetic permeability material.

8. The battery of claim 7, wherein said high magnetic permeability material comprises Mu metal.

9. The battery of claim 1, further comprising a case, and said magnetic shield portion is at least one of internal and external to said case.

10. The battery of claim 9, wherein said magnetic shield portion is internal to said case, said magnetic shield portion being planar and of a first thickness that provides structural support to said battery.

11. The battery of claim 10, wherein further comprising a planar structural element, internal to said case, of a second thickness that provides structural support to said battery.

12. The battery of claim 11, wherein said magnetic shield portion and said planar structural element substantially sandwich said battery portion.

13. The battery of claim 11, wherein said planar structural element is enabled to route said magnetic flux there through, such that said magnetic flux is routed through said magnetic shield portion and said planar structural element.

14. The battery of claim 1, wherein at least one normal of said magnetic shield portion is oriented in a direction of said magnetic field.

15. A mobile communication device comprising:

a radio interconnected with a microphone and a receiver;

a magnetic shield portion for routing magnetic flux away from said receiver when said radio is in operation, said magnetic flux from sources of magnetic interference in said mobile communication device.

16. The mobile communication device of claim 15, further comprising a battery interface for receiving a battery to provide electrical power to said radio, said battery emitting a magnetic field when said radio is in operation, wherein when said battery is inserted into said battery interface, said magnetic shield portion is located between said battery and said receiver.

17. The mobile communication device of claim 16, wherein said magnetic shield portion is located on a face of said battery interface.

18. The mobile communication device of claim 15, wherein said magnetic shield portion is incorporated in at least a body of said mobile communication device.

19. The mobile communication device of claim 15, wherein said magnetic shield portion comprises a high magnetic permeability material.

20. The mobile communication device of claim 19, wherein said high magnetic permeability material comprises Mu metal.