Low magnetic interference battery

Patent metadata

Field	Value
Publication number	US-9224990-B2
Application number	US-201314048912-A
Country	US
Kind code	B2
Filing date	Oct 8, 2013
Priority date	Jul 14, 2009
Publication date	Dec 29, 2015
Grant date	Dec 29, 2015

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.

First claim

What is claimed is:

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.

Assignees

• Blackberry Ltd

Inventors

• Boda Mallikarjun
• Brubacher Jonathan Quinn
• Wu Chee-Ming Jimmy
• Decker Edward Vann
• Van Schyndel Andre John
• Hawker Larry Edward

Classifications

• F04D25/166 Primary

  using fans · CPC title

• H01M50/131

  characterised by physical properties, e.g. gas permeability, size or heat resistance · CPC title

• H01M50/124 Primary

  having a layered structure · CPC title

• H01M50/141

  for protecting against humidity · CPC title

• H01M50/119

  Metals · CPC title