PRESSED POWDER PELLET BATTERY ELECTRODE SYSTEM

• US 20070292600A1
• Filed: 06/19/2006
• Published: 12/20/2007
• Est. Priority Date: 06/19/2006
• Status: Abandoned Application

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Morgan, Adam J.
• Application Number:
  US11/424,976
• Publication Number:
  US 20070292600A1
• Time in Patent Office: Days
• US Class Current: 427/58
• CPC Class Codes: B22F 3/03 Press-moulding apparatus therefor
• CPC Class Codes: B22F 3/093 using vibrations or friction
• CPC Class Codes: B22F 7/08 with one or more parts not made from powder B22F7/062 takes precedence
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/0416 involving impregnation with a solution, dispersion, paste or dry powder H01M4/0438 takes precedence
• CPC Class Codes: H01M 4/043 involving compressing or compaction
• CPC Class Codes: H01M 4/621 Binders
• CPC Class Codes: H01M 4/625 Carbon or graphite
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/669 Steels
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

A method of manufacturing a pressed powder electrode for an electrochemical power source for use with an implantable medical device is provided. The method includes surrounding a current collector with layered sections of electrode powder. The method also includes compacting the electrode powder against the current collector from opposite sides to form an electrode pellet using springs having spring constants calculated to relieve a gap difference in equal strokes from each side. The resulting electrode pellet includes a substantially centered collector. According to various embodiments, compacting the electrode powder includes compacting using at least two springs on opposite sides of the current collector. Compacting the electrode powder includes using at least one forced air supply to compact the powder, according to various embodiments. Other aspects and embodiments are provided herein.

Claims

1. A method, comprising:

surrounding a current collector with layered sections of electrode powder; and

compacting the electrode powder against the current collector from opposite sides to form an electrode pellet using springs having spring constants calculated to relieve a gap difference in equal strokes from each side, wherein the resulting electrode pellet includes a substantially centered collector.

2. The method of claim 1, wherein compacting the electrode powder includes compacting the electrode powder from each side substantially simultaneously.

3. The method of claim 1, wherein compacting the electrode powder includes compacting using at least two springs on opposite sides of the current collector.

4. The method of claim 1, wherein surrounding the current collector includes holding the current collector in a fixed position using a die.

5. The method of claim 1, wherein compacting the electrode powder includes using at least one forced air supply to compact the powder.

6. A system, comprising:

means for surrounding a current collector with layered sections of electrode powder; and

means for compacting the electrode powder against the current collector from opposite sides using springs having spring constants calculated to relieve a gap difference in equal strokes from each side, wherein a resulting electrode pellet includes a substantially centered current collector.

7. The system of claim 6, wherein the means for surrounding a current collector includes at least one clamping means.

8. The system of claim 7, wherein the at least one clamping means holds the current collector parallel to the face of the compacting means.

9. The system of claim 6, wherein the compacting means includes at least one forced air supply to compact the powder.

10. The system of claim 9, wherein the at least one forced air supply is adapted to supply forced air to at least two opposing air cylinders to compact powder from opposite sides of the collector.

11. A system, comprising:

means for centering and holding a current collector between at least two pistons;

means for compacting the electrode powder against the current collector from opposite sides using spring constants calculated to relieve a gap difference in equal strokes from each side, wherein a resulting electrode pellet includes a substantially centered current collector.

12. The system of claim 11, wherein the pistons are adapted to be actuated using springs.

13. The system of claim 11, wherein the pistons are adapted to be actuated using forced air.

14. The system of claim 11, wherein the resulting electrode pellet is adapted to be used in a battery for powering an implantable medical device.

15. The system of claim 14, wherein the implantable medical device includes a pacemaker.

16. A system, comprising:

a die adapted to hold a current collector and having an aperture;

two pistons adapted to movably extend through the aperture and further adapted to compact electrode powder against the current collector from opposite sides;

at least two springs connected to the pistons, the springs having spring constants calculated to relieve gap difference in equal strokes from each side, wherein a resulting electrode pellet includes a substantially centered collector.

17. The system of claim 16, wherein the electrode powder includes carbon monofluoride.

18. The system of claim 16, wherein the electrode powder includes polytetrafluoroethylene.

19. The system of claim 16, wherein the resulting electrode pellet is adapted to be used in a battery for powering an implantable medical device.

20. The system of claim 19, wherein the implantable medical device includes a defibrillator.

21. A method, comprising:

forming a housing;

forming a pressed powder pellet electrode with a substantially centered current collector using a single compaction step; and

placing at least two electrodes, at least one of the electrodes including the pressed powder electrode, and an electrolyte within the housing.

22. The method of claim 21, wherein forming the pressed powder electrode includes pressing carbon monofluoride powder.

23. The method of claim 21, wherein forming the pressed powder electrode includes forming the electrode with an aluminum current collector.

24. The method of claim 21, wherein forming the pressed powder electrode includes forming the electrode with a stainless steel current collector.

25. The method of claim 21, wherein forming the pressed powder electrode includes forming the electrode with a nickel current collector.