Low magnetic interference battery and mobile communication device

• US 8,357,460 B2
• Filed: 07/14/2009
• Issued: 01/22/2013
• Est. Priority Date: 07/14/2009
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Van Schyndel, Andre John, Hawker, Larry Edward, Boda, Mallikarjun, Brubacher, Jonathan Quinn
• Primary Examiner(s): Kalafut, Stephen J.
• Application Number:
  US12/502,349
• Publication Number:
  US 20110014942A1
• Time in Patent Office: 1,288 Days
• Field of Search: 429/10, 429/163, 429/175, 429/176
• US Class Current: 429/10
• 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 case;

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 internal to said case, said 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, said magnetic shield portion being planar and of a first thickness that provides structural support to said battery.

2. 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.

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

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

5. The battery of claim 4, wherein said magnetic shield portion further comprises apertures for contacting said battery portion.

6. The battery of claim 1, wherein further comprising a planar structural element, internal to said case, of a second thickness that provides structural support to said battery.

7. The battery of claim 6, wherein said magnetic shield portion and said planar structural element substantially sandwich said battery portion.

8. The battery of claim 6, 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.

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