Insert molded electrode grid

• US 20090246618A1
• Filed: 03/27/2009
• Published: 10/01/2009
• Est. Priority Date: 03/28/2008
• Status: Abandoned Application

• Current Assignee: Firefly International Energy Co.
• Original Assignee: Firefly Energy, Inc. (Firefly International Energy Co.)
• Inventors: Dirks, Keith W.
• Application Number:
  US12/382,978
• Publication Number:
  US 20090246618A1
• Time in Patent Office: Days
• US Class Current: 429/163
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/72 Grids
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The present disclosure is directed to an electrode grid for a battery. The electrode grid may include at least one active material retaining segment, the active material retaining segment including one or more channels. The at least one active material retaining segment may be formed of at least one of carbon foam and graphite foam. In addition, the electrode grid may include a conductive material deposited within the one or more channels.

Claims

1. A method for manufacturing an electrode grid, comprising:

forming a series of channels within an active material retaining segment;

providing the active material retaining segment to a mold;

providing a molten conductive material to the mold, causing the molten conductive material to flow into the channels; and

allowing the molten conductive material to solidify, thereby forming an electrode grid comprised of the active material retaining segment and the solidified conductive material.

2. The method of claim 1, wherein a pressure ranging from 50 psi to 150 psi is applied within the mold after providing the molten conductive material.

3. The method of claim 1, further including coating the electrode grid with an active material to form an electrode plate.

4. The method of claim 1, wherein the active material retaining segment includes a polymer or a polymer composite.

5. The method of claim 1, wherein the active material retaining segment includes carbon foam or graphite foam.

6. The method of claim 5, wherein forming the series of channels includes machining or using a forming mold to crush the series of channels into the active material retaining segment.

7. The method of claim 1, further including crushing a wire form into the active material retaining segment prior to providing the molten conductive material to the mold.

8. The method of claim 1, further including incorporating one or more materials with high thermal conductivity into the mold to thereby increase flow time for the molten conductive material before the conductive material cools and solidifies.

9. An electrode grid for a battery, comprising:

at least one active material retaining segment, the active material retaining segment including one or more channels;

wherein the at least one active material retaining segment is formed of at least one of carbon foam and graphite foam; and

a conductive material deposited within the one or more channels.

10. The electrode grid of claim 9, wherein the conductive material includes lead or a lead composition.

11. The electrode grid of claim 9, further including a wire form crushed into the at least one active material retaining segment and covered by the conductive material.

12. The electrode grid of claim 11, wherein the wire form includes a plastic or composite material.

13. The electrode grid of claim 9, wherein the conductive material forms a border at least partially surrounding a perimeter of the at least one active material retaining segment, and extending at least partially across the thickness of the at least one active material retaining segment.

14. The electrode grid of claim 13, wherein at least a portion of the border extends completely across the thickness of the at least one active material retaining segment.

15. The electrode grid of claim 9, wherein the one or more channels includes a plurality of channels radiating outwardly from a conductive tab of the electrode grid.

16. The electrode grid of claim 9, wherein the conductive material forms a conductive strand, the conductive strand including a groove formed therein.

17. An electrode plate including the electrode grid of claim 9, and further including:

one or more additional active material retaining segments;

wherein the conductive material is in contact with two or more of the active material retaining segments, substantially bonding the two or more active material retaining segments to one another; and

an active material disposed on the two or more active material retaining segments.

18. A battery, comprising:

a case;

an electrolyte; and

an electrode plate comprising;

two or more active material retaining segments each including a carbon foam core having one or more channels;

a conductive material in contact with the two or more active material retaining segments, substantially bonding the two or more active material retaining segments to one another, wherein the conductive material is also deposited within the one or more channels; and

an active material disposed on the two or more active material retaining segments.

19. The battery of claim 18, further including an electrically conductive wire form crushed into at least one of the two or more active material retaining segments about a perimeter thereof and covered by the conductive material.

20. The battery of claim 19, wherein the electrically conductive wire form includes a conductive plastic or conductive composite material.