LOW MAGNETIC INTERFERENCE BATTERY

• US 20110014515A1
• Filed: 04/01/2010
• 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: Wu, Chee-Ming Jimmy, Decker, Edward Vann, Brubacher, Jonathan Quinn, Hawker, Larry Edward, Van Schyndel, Andre John, Boda, Mallikarjun
• Granted Patent: US 8,580,413 B2
• Time in Patent Office: Days
• US Class Current: 429/185
• CPC Class Codes: F04D 25/166 using fans
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 7/06 with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/124 having a layered structure
• CPC Class Codes: H01M 50/131 characterised by physical properties, e.g. gas permeability, size or heat resistance
• CPC Class Codes: H01M 50/141 for protecting against humidity
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A low magnetic interference battery is provided, the battery insertable into a mobile communication device, the mobile communication device comprising a radio interconnected with a microphone and a receiver. The battery comprises a battery portion enabled to provide electrical power to the radio, the battery portion emitting a magnetic field when in operation. The battery further comprises a sealing portion for sealing the battery portion therein such that the battery portion is protected from moisture, the sealing portion comprising a magnetic shield portion arranged relative to the battery portion such that magnetic flux from the battery portion is routed away from the receiver when the battery is in operation in the mobile communication device.

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 sealing portion for sealing said battery portion therein such that said battery portion is protected from moisture, said sealing portion comprising 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 sealing portion comprises a rigid sealing can, providing structural stability to said battery.

3. The battery of claim 2, wherein at least a portion of said sealing can comprises a high magnetic permeability material such that said magnetic shield portion is structurally incorporated into said sealing can.

4. The battery of claim 2, wherein said sealing can comprises a can portion, for containing said battery portion therein, and a plate portion, attached to said can portion, for sealing said battery portion in said sealing can.

5. The battery of claim 1, wherein said magnetic shield portion comprises a coating on said sealing portion.

6. The battery of claim 1, wherein said sealing portion comprises a soft sealing case.

7. The battery of claim 5, wherein said soft sealing case comprises at least one flexible layer of insulating material and at least one flexible layer of high magnetic permeability material, such that said magnetic shield portion is integrated into said soft sealing case via said at least one flexible layer of high magnetic permeability material, said soft sealing case further comprising a layer of said insulating material on a battery portion side of said soft sealing case.

8. The battery of claim 6, wherein said soft sealing case further comprises at least one flexible layer of metal foil.

9. The battery of claim 1, wherein said magnetic shield portion comprises Mu Metal.

10. The battery of claim 1, further comprising connectors to said battery portion through said sealing portion.