Electric storage battery construction and method of manufacture

• US 7,432,012 B2
• Filed: 09/17/2003
• Issued: 10/07/2008
• Est. Priority Date: 01/15/2002
• Status: Active Grant

• Current Assignee: Quallion, LLC (EnerSys)
• Original Assignee: Quallion, LLC (EnerSys)
• Inventors: Tsukamoto, Hisashi, Skinlo, David M., Zolotnik, Vladimir, Szyszkowski, Andrew
• Primary Examiner(s): Ryan; Patrick
• Assistant Examiner(s): Wang; Eugenia
• Application Number:
  US10/666,340
• Publication Number:
  US 20040053117A1
• Time in Patent Office: 1,847 Days
• Field of Search: 429/94, 429/186, 429/161
• US Class Current: 429/94
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 50/107 having curved cross-section, e.g. round or elliptic H01M50/103, H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/154 Lid or cover comprising an axial bore for receiving a central current collector
• CPC Class Codes: H01M 50/545 formed by the casing of the cells cup shaped terminals adapted for cells having curved cross-section H01M50/56
• CPC Class Codes: H01M 50/548 on opposite sides of the cell
• CPC Class Codes: H01M 50/559 Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells H01M50/553 takes precedence
• CPC Class Codes: H01M 6/10 with wound or folded electrodes
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49108 Electric battery cell making
• CPC Class Codes: Y10T 29/4911 including sealing
• CPC Class Codes: Y10T 29/49112 including laminating of indefinite length material
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

A battery includes a feedthrough pin which is electrically connected to an inner end of an electrode substrate. A mandrel on the pin can permit the pin/mandrel to be used as an arbor to facilitate winding layers of a spiral jellyroll electrode assembly. The pin can serve as one of the battery terminals.

Claims

1. An electrode assembly, comprising:

an electrically conductive, elongate pin;

an elongate mandrel mounted on at least a portion of the pin, the mandrel including a longitudinal slot;

a first electrode strip in electrical communication with the pin and a second electrode strip electrically insulated from the pin, the first electrode strip and the second electrode strip being wound around the pin; and

the first electrode strip extending through the mandrel slot.

2. The electrode assembly of claim 1, wherein a portion of the pin extends beyond the spiral roll to form a battery terminal.

3. The electrode assembly of claim 1, wherein the mandrel is crimped onto the pin.

4. The electrode assembly of claim 1, wherein the mounted mandrel has a channel through which electrolyte can be injected.

5. The electrode assembly of claim 1, wherein at least one separator strip separates the first electrode strip and the second electrode strip.

6. The electrode assembly of claim 1, wherein a portion of the first electrode strip is positioned between the mandrel and the pin.

7. The electrode assembly of claim 1, wherein the first electrode strip includes active material positioned on a substrate, the substrate being positioned between the mandrel and the pin without the active material being positioned between the mandrel and the pin.

8. The electrode assembly of claim 1, wherein at least one weld directly connects the first electrode strip to the pin.

9. The electrode assembly of claim 1, wherein the pin includes an alloy of PtIr alloy.

10. The electrode assembly of claim 1, further comprising:

a first end cap mounted on the pin,

the first end cap including an electrical insulator,

the pin extending through the electrical insulator, and

the pin being hermetically sealed to the electrical insulator.

11. The electrode assembly of claim 1, wherein a weld attaches the mandrel to the pin.

12. The electrode assembly of claim 1, wherein the mandrel includes titanium or an alloy of titanium.

13. The electrode assembly of claim 1, wherein the mandrel includes a tube.

14. The electrode assembly of claim 13, wherein the pin is positioned in an interior of the tube.

15. The electrode assembly of claim 1, wherein the mandrel has a c-shaped cross-section.

16. The electrode assembly of claim 1, wherein the mandrel is fitted around the pin such that the first electrode strip and the second electrode strip are wound around the pin and the mandrel.

17. The electrode assembly of claim 1, wherein the mandrel is a reinforcing mandrel.

18. An electrode assembly, comprising:

an electrically conductive, elongate pin;

an elongate mandrel mounted on at least a portion of the pin;

a first electrode strip in electrical communication with the pin and a second electrode strip electrically insulated from the pin, the first electrode strip and the second electrode strip being wound around the pin, and a portion of the first electrode strip is positioned between the mandrel and the pin; and

a first end cap mounted on the pin;

the first end cap including an electrical insulator,

the pin extending through the electrical insulator, and

the pin being hermetically sealed to the electrical insulator.

19. The electrode assembly of claim 18, wherein a portion of the pin extends beyond the spiral roll to form a battery terminal.

20. The electrode assembly of claim 18, wherein the mandrel is crimped onto the pin.

21. The electrode assembly of claim 18, wherein the mounted mandrel has a channel through which electrolyte can be injected.

22. The electrode assembly of claim 18, wherein at least one separator strip separates the first electrode strip and the second electrode strip.

23. The electrode assembly of claim 18, wherein the first electrode strip includes active material positioned on a substrate, the substrate being positioned between the mandrel and the pin without the active material being positioned between the mandrel and the pin.

24. The electrode assembly of claim 18, wherein at least one weld directly connects the first electrode strip to the pin.

25. The electrode assembly of claim 18, wherein the pin includes an alloy of PtIr alloy.

26. The electrode assembly of claim 18, wherein a weld attaches the mandrel to the pin.

27. The electrode assembly of claim 18, wherein the mandrel includes titanium or an alloy of titanium.

28. The electrode assembly of claim 18, wherein the mandrel includes a tube.

29. The electrode assembly of claim 28, wherein the pin is positioned in an interior of the tube.

30. The electrode assembly of claim 18, wherein the mandrel has a c-shaped cross-section.

31. The electrode assembly of claim 18, wherein the mandrel is fitted around the pin such that first electrode strip and the second electrode strip are wound around the pin and the mandrel.

32. The electrode assembly of claim 18, wherein the mandrel is a reinforcing mandrel.

33. An electrode assembly, comprising:

an electrically conductive, elongate pin;

an elongate mandrel mounted on at least a portion of the pin;

a first electrode strip in electrical communication with the pin and a second electrode strip electrically insulated from the pin, a portion of the first electrode strip is positioned between the mandrel and the pin; and

the mandrel is fitted around the pin and the first electrode strip and the second electrode strip are wound around the pin and the mandrel.

34. The electrode assembly of claim 33, wherein a portion of the pin extends beyond the spiral roll to form a battery terminal.

35. The electrode assembly of claim 33, wherein the mandrel is crimped onto the pin.

36. The electrode assembly of claim 33, wherein the mounted mandrel has a channel through which electrolyte can be injected.

37. The electrode assembly of claim 33, wherein at least one separator strip separates the first electrode strip and the second electrode strip.

38. The electrode assembly of claim 33, wherein the first electrode strip includes active material positioned on a substrate, the substrate being positioned between the mandrel and the pin without the active material being positioned between the mandrel and the pin.

39. The electrode assembly of claim 33, wherein at least one weld directly connects the first electrode strip to the pin.

40. The electrode assembly of claim 33, wherein the pin includes an alloy of PtIr alloy.

41. The electrode assembly of claim 33, wherein a weld attaches the mandrel to the pin.

42. The electrode assembly of claim 33, wherein the mandrel includes titanium or an alloy of titanium.

43. The electrode assembly of claim 33, wherein the mandrel includes a tube.

44. The electrode assembly of claim 43, wherein the pin is positioned in an interior of the tube.

45. The electrode assembly of claim 33, wherein the mandrel has a c-shaped cross-section.

46. The electrode assembly of claim 33, wherein the mandrel is a reinforcing mandrel.

47. An electrode assembly, comprising:

an electrically conductive, elongate pin;

an elongate mandrel mounted on at least a portion of the pin, the mandrel having a c-shaped cross-section;

a first electrode strip in electrical communication with the pin and a second electrode strip electrically insulated from the pin, the first electrode strip and the second electrode strip being wound around the pin; and

a first end cap mounted on the pin;

the first end cap including an electrical insulator,

the pin extending through the electrical insulator, and

the pin being hermetically sealed to the electrical insulator.

48. The electrode assembly of claim 47, wherein the mounted mandrel has a channel through which electrolyte can be injected.

49. The electrode assembly of claim 47, wherein at least one separator strip separates the first electrode strip and the second electrode strip.

50. The electrode assembly of claim 47, wherein the first electrode strip includes active material positioned on a substrate, the substrate being positioned between the mandrel and the pin without the active material being positioned between the mandrel and the pin.

51. The electrode assembly of claim 47, wherein a weld attaches the mandrel to the pin.

52. The electrode assembly of claim 47, wherein the mandrel includes a tube and the pin is positioned in an interior of the tube.

53. The electrode assembly of claim 47, wherein the mandrel is fitted around the pin such that the first electrode strip and the second electrode strip are wound around the pin and the mandrel.

54. An electrode assembly, comprising:

an electrically conductive, elongate pin;

an elongate mandrel mounted on at least a portion of the pin, the mandrel having a c-shaped cross-section;

a first electrode strip in electrical communication with the pin and a second electrode strip electrically insulated from the pin; and

the mandrel is fitted around the pin and the first electrode strip and the second electrode strip are wound around the pin and the mandrel.

55. The electrode assembly of claim 54, wherein a portion of the pin extends beyond the spiral roll to form a battery terminal.

56. The electrode assembly of claim 54, wherein the mounted mandrel has a channel through which electrolyte can be injected.

57. The electrode assembly of claim 54, wherein the first electrode strip includes active material positioned on a substrate, the substrate being positioned between the mandrel and the pin without the active material being positioned between the mandrel and the pin.

58. The electrode assembly of claim 54, wherein a weld attaches the mandrel to the pin.

59. The electrode assembly of claim 54, wherein the mandrel includes a tube and the pin is positioned in an interior of the tube.