Low magnetic interference battery

• US 9,224,990 B2
• Filed: 10/08/2013
• Issued: 12/29/2015
• Est. Priority Date: 07/14/2009
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Boda, Mallikarjun, Brubacher, Jonathan Quinn, Wu, Chee-Ming Jimmy, Decker, Edward Vann, Van Schyndel, Andre John, Hawker, Larry Edward
• Primary Examiner(s): Gupta, Yogendra
• Assistant Examiner(s): Luk, Emmanuel S
• Application Number:
  US14/048,912
• Publication Number:
  US 20140037997A1
• Time in Patent Office: 812 Days
• Field of Search: 429/10, 429/163, 429/185, 429/180, 429/175, 429/178, 429/181, 429/176
• US Class Current: 1/1
• 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 power pack comprising:

a battery portion producing magnetic flux when in operation; and

,

a sealing portion configured to seal the battery portion therein such that the battery portion is protected from moisture, the sealing portion comprising a magnetic shield portion configured to prevent the magnetic flux from leaking through a receiver side of the power pack.

2. The power pack of claim 1, wherein the magnetic shield portion is internal to the sealing portion.

3. The power pack of claim 1, wherein the magnetic shield portion comprises a coating on a surface of the sealing portion.

4. The power pack of claim 1, wherein the sealing portion comprises a rigid sealing can, providing structural stability to the battery.

5. The power pack of claim 4, wherein the magnetic shield portion is structurally incorporated into the rigid sealing can.

6. The power pack of claim 5, wherein the magnetic shield portion comprises a high magnetic permeability material.

7. The power pack of claim 4, wherein the rigid sealing can comprises a can portion configured to contain the battery portion therein, and a plate portion, attached to the can portion, configured to seal the battery portion in the sealing can.

8. The power pack of claim 1, wherein the sealing portion comprises a soft sealing case.

9. The power pack of claim 8, wherein the soft sealing case comprises at least one flexible layer of insulating material and at least one flexible layer of high magnetic permeability material.

10. The power pack of claim 9, wherein the magnetic shield portion comprises the at least one flexible layer of high magnetic permeability material.

11. The power pack of claim 9, wherein the soft sealing case further comprises a layer of the flexible insulating material on a battery portion side of the soft sealing case.

12. The power pack of claim 9, wherein the soft sealing case further comprises at least one flexible layer of metal foil.

13. The power pack of claim 1, wherein the magnetic shield portion is further configured to substantially contain the magnetic flux within the sealing portion.

14. The power pack of claim 1, wherein the magnetic shield portion is further configured to route the magnetic flux there through.

15. The power pack of claim 1, wherein the magnetic shield portion is further configured to prevent the magnetic flux from leaking through a receiver side portion of the power pack.

16. The power pack of claim 1, wherein the magnetic shield portion comprises a high magnetic permeability material.

17. The power pack of claim 1, wherein the magnetic shield portion comprises Mu Metal.

18. The power pack of claim 1, further comprising connectors to the battery portion through the sealing portion.