Electrode tabs and methods of forming

Patent metadata

Field	Value
Publication number	US-11791521-B2
Application number	US-202017017471-A
Country	US
Kind code	B2
Filing date	Sep 10, 2020
Priority date	Sep 13, 2019
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

Electric tabs and methods for manufacturing are described. A method includes disposing a dielectric layer on a second side of a base material, the base material having a first side and the second side. The method including developing the dielectric layer on the second side of the base material. And, the method including etching the first side of the base material to form an electrode tab.

First claim

What is claimed is:

1. A method of manufacturing, comprising:
disposing a tie layer on a second side of a base material, the base material having a first side and the second side;
disposing a first dielectric layer on the tie layer on the second side of the base material;
developing the first dielectric layer on the second side of the base material according to a first pattern;
etching at least a portion of the first side of the base material to form an electrode tab;
micro-etching the tie layer after etching the first side of the base material;
electroplating nickel on the electrode tab; and
applying a second dielectric layer on at least the portion of the first side of the base material that forms the electrode tab.

2. The method according to claim 1 , comprising:
rounding an edge of the base material, wherein the second dielectric layer is disposed along the rounded edge of the base material.

3. The method according to claim 1 , comprising:
cutting through a polyimide coating on a perimeter of the electrode tab.

4. The method according to claim 1 , comprising:
disposing a sealant on both sides of the electrode tab.

5. The method according to claim 1 , wherein the electrode tab is an anode tab.

6. The method according to claim 1 , wherein the electrode tab is a cathode tab.

7. The method according to claim 1 where the tie layer is an organic antioxidant.

8. The method according to claim 1 where the tie layer is a conversion coating.

9. The method according to claim 1 where the tie layer is a vapor deposited metal selected for adhesion properties.

10. The method according to claim 1 where nickel is plated via electrolytic or electroless methods.

11. A method of manufacturing, comprising:
disposing a first dielectric layer on a first side of a base material as a series of lanes disposed along the first side of the base material;
etching at least a portion of the base material according to a pattern to form an electrical tab between the series of lanes of the first dielectric layer;
rounding any edges of the etched based material;
applying a second dielectric layer on both a portion of a second side of the base material and over the rounded edges of the etched based material that forms the electrical tab; and
removing a portion of the first dielectric layer and the second dielectric layer at a perimeter of the base material to form a shape of the electrical tab.

12. The method according to claim 11 , wherein the base material is a copper foil including a chromate layer.

13. The method according to claim 11 , comprising:
micro-etching the base material to expose copper surface.

14. The method according to claim 11 , comprising:
plating nickel on all exposed copper surfaces.

15. The method according to claim 11 , wherein the base material is an aluminum foil.

16. The method according to claim 15 , comprising: disposing the second dielectric layer as a series of lanes disposed along the second side of the base material and over the rounded edges of each exposed aluminum surface, the second dielectric layer comprising a polyimide.

17. The method according to claim 16 , wherein the lanes of the second dielectric layer on the second side of the base material are narrower than the lanes of the first dielectric layer on the first side of the base material.

18. A method for manufacturing, comprising:
providing a base material, the base material comprising a copper foil that is chromate treated forming a chromate layer;
disposing a first photoimageable polyimide layer on a separator side of the base material;
developing the first photoimageable polyimide layer according to a first pattern;
etching a foil side of the base material according to a second pattern to form an anode tab, wherein the first photoimageable polyimide layer on the separator side of the base material patterned according to the first pattern exposes an access point to a main anode, at least two resistive temperature detector leads, and a reference electrode lead of the anode tab;
micro-etching the base material to remove the chromate layer;
disposing a nickel layer on the foil side of the base material;
etching the nickel layer to form a resistive temperature detector circuit;
disposing a second photoimageable polyimide layer on the foil side of the base material according to a third pattern to provide access points to pin outs and a main foil attach face;
developing the second photoimageable polyimide layer; and
plating nickel on the foil side and separator side of the base material.

19. The method according to claim 18 , comprising:
applying a reference electrode material on the anode tab.

20. A method for manufacturing, comprising:
disposing a first photoimageable polyimide layer on a separator side of a base material, the base material is an aluminum foil;
developing the first photoimageable polyimide layer according to a first pattern;
etching at least a portion of a foil side of the base material according to a second pattern to form a cathode tab, wherein the first photoimageable polyimide layer on the separator side of the base material patterned according to the first pattern exposes an access point to a main cathode, at least two resistive temperature detector leads, and a reference electrode lead;
disposing a nickel layer on the foil side of the base material;
etching the nickel layer to form a resistive temperature detector circuit;
disposing a second photoimageable polyimide layer on the foil side of the base material; and
developing the second photoimageable polyimide layer according to a third pattern such that at least the second photoimageable polyimide layer is disposed over a remaining portion of the foil side of the base material that forms the cathode tab.

21. The method according to claim 16 , comprising:
applying a reference electrode material to a portion of the exposed base material on the separator side of the base material.

22. A method for manufacturing a cathode tab with integrated reference electrode, comprising:
disposing a first photoimageable polyimide layer on a separator side of the base material, the base material comprising an aluminum foil;
developing the first photoimageable polyimide layer according to a first pattern;
etching a foil side of the base material according to a second pattern to remove a portion of the foil side of the base material, wherein the first photoimageable polyimide layer on the separator side of the base material patterned according to the first pattern exposes an access point to a main cathode, at least two resistive temperature detector leads, and a reference electrode lead of the cathode tab;
disposing a second photoimageable polyimide layer on the foil side of the base material;
developing the second photoimageable polyimide layer such that the second photoimageable polyimide layer is disposed on a remaining portion of the foil side of the base material; and
applying a reference electrode material to a portion of the exposed base material on the separator side of the base material.

23. A method for manufacturing a cathode tab with integrated reference electrode, comprising:
disposing a first photoimageable polyimide layer on a separator side of a base material, the base material is an aluminum foil;
developing the first photoimageable polyimide layer;
etching a foil side of the base material to remove a portion of the foil side of the base material to form t

Assignees

• Hutchinson Technology

Inventors

• Riemer Douglas P
• Ladwig Peter F
• Starkey Joseph D
• Davis Michael W
• Jelkin Duane M

Classifications

• H01M50/534 Primary

  characterised by the material of the leads or tabs · CPC title

• C25D3/12

  of nickel or cobalt · CPC title

• C25D7/0614

  Strips or foils · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title