Electrical energy storage device

• US 6,265,098 B1
• Filed: 09/12/1997
• Issued: 07/24/2001
• Est. Priority Date: 07/21/1993
• Status: Expired due to Term

• Current Assignee: BluWav Systems LLC (Magna International Incorporated)
• Original Assignee: EV Energy Systems, Ltd.
• Inventors: Audit, Thomas E., West, Jon K.
• Primary Examiner(s): Maples, John S.
• Application Number:
  US08/928,906
• Time in Patent Office: 1,411 Days
• Field of Search: H01/M.610, 429/160, 429/94, 429/161, 429/158, 429/159
• US Class Current: 429/94
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 6/005 Devices for making primary cells
• CPC Class Codes: H01M 6/10 with wound or folded electrodes
• CPC Class Codes: H01M 6/42 Grouping of primary cells into batteries H01M6/40 takes precedence
• CPC Class Codes: Y10T 29/49108 Electric battery cell making
• CPC Class Codes: Y10T 29/53135 Storage cell or battery

Abstract

An electric energy storage device includes a plurality of electrical energy cells. Each of the cells has an anode plate, a cathode plate, and electrolyte material. Current collectors are provided between the cells to conduct electrical current between the cells. The current collectors optionally include a seal that prevents electrolyte flow between the cells while permitting flow of vapor between the cells. The cells and current collectors may be contained in a common pressure vessel without separate pressure vessels being provided for each of the cells.

Claims

1. An electric energy storage device, comprising:

a pressure vessel;

a plurality of electrically connected coiled windings disposed within the pressure vessel, each winding including a cathode plate, an anode plate, and a separator located therebetween, each winding defining a circular first side and a circular second side axially spaced from the first side;

an electrolyte material located within each winding; and

a plurality of current collectors secured within the pressure vessel, at least one of the current collectors being electrically connected to a pair of the windings,

wherein the plurality of windings are sealed from one another in the pressure vessel to prevent flow of the electrolyte material between the plurality of windings while permitting flow of vapor in the pressure vessel between the plurality of windings.

2. The device of claim 1, further comprising

at least one casing in the pressure vessel, the casing containing at least one of the windings and including a vent for permitting flow of vapor from the casing; and

a plurality of seals for preventing flow of the electrolyte material between the plurality of windings.

3. The device of claim 1 further comprising a plurality of seals providing the sealing of the plurality of windings from one another.

4. The device of claim 3, wherein the seals are provided on the current collectors.

5. An electrical energy storage device comprising:

a plurality of electrical energy cells including at least a first electrical energy storage cell and a second electrical storage cell, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material; and

at least one current collector positioned between the first and second electrical energy storage cells for conducting electrical current between the first electrical energy storage cell and the second electrical storage cell, the current collector including a first side and a second side, the first side of the current collector being in direct contact with the anode plate of the first electrical energy storage cell and the second side of the current collector being in direct contact with the cathode plate of the second electrical energy storage cell;

a pressure vessel containing the plurality of electrical energy cells and the current collector; and

a casing containing the plurality of electrical energy cells and the current collector, the casing being in the pressure vessel.

6. An electrical energy storage device comprising:

a plurality of electrical energy cells including at least a first electrical energy storage cell and a second electrical energy storage cell, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material; and

at least one current collector positioned between the first and second electrical energy storage cells for conducting electrical current between the first electrical energy storage cell and the second electrical energy storage cell, the current collector including a first side and a second side, the first side of the current collector being in direct contact with the anode plate of the first electrical energy storage cell and the second side of the current collector being in direct contact with the cathode plate of the second electrical energy storage cell;

a pressure vessel containing the plurality of electrical energy cells and the current collector; and

a plurality of casings each containing one of the electrical energy cells, the casings being in the pressure vessel.

7. An electrical energy storage device comprising:

a plurality of electrical energy cells including at least a first electrical energy storage cell and a second electrical energy storage cell, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material,

wherein each of the electrical energy storage cells comprises a coil winding including the anode plate and the cathode plate;

at least one current collector positioned between the first and second electrical energy storage cells for conducting electrical current between the first electrical energy storage cell and the second electrical energy storage cell, the current collector comprising a solid member impervious to flow of the electrolyte material therethrough; and

a seal on the current collector, the seal limiting the flow of the electrolyte material between the first and second electrical energy cells.

8. The device of claim 7, wherein the seal comprises an O-ring disposed about an outer periphery of the current collector.

9. An electrical energy storage device comprising:

a plurality of electrical energy cells including at least a first electrical energy storage cell and a second electrical energy storage cell, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material,

wherein each of the electrical energy storage cells comprises a coil winding including the anode plate and the cathode plate; and

at least one current collector positioned between the first and second electrical energy storage cells for conducting electrical current between the first electrical energy storage cell and the second electrical energy storage cell, the current collector including a first side and a second side, the first side of the current collector being in direct contact with the anode plate of the first electrical energy storage cell and the second side of the current collector being in direct contact with the cathode plate of the second electrical energy storage cell.

10. The device of claim 9, further comprising a pressure vessel containing the plurality of electrical energy cells and the current collector.

11. The device of claim 9, wherein the first side of the current collector includes a plurality of protrusions contacting multiple locations on the anode plate of the first electrical energy storage cell, and wherein second side of the current collector includes a plurality of protrusions contacting multiple locations on the cathode plate of the second electrical energy storage cell.

12. The device of claim 11, wherein said protrusions on the first and second sides of the current collector include ridges.

13. The device of claim 9, wherein the electrical energy storage cells are electrically coupled together in series.

14. The device of claim 9, wherein each of the electrical energy storage cells further comprises a separator located between the anode plate and the cathode plate.

15. The device of claim 9, wherein the current collector comprises a solid member impervious to flow of the electrolyte material therethrough.

16. The device of claim 9, wherein the first side of the current collector is pressed against the anode plate of the first electrical energy storage cell and wherein the second side of the current collector is pressed against the cathode plate of the second electrical energy storage cell.

17. An electrical energy storage device, comprising:

a plurality of electrical energy cells including at least a first electrical energy storage cell and a second electrical energy storage cell electrically coupled to one another, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material; and

a pressure vessel containing the electrical energy cells,

wherein the electrical energy cells are sealed from one another in the pressure vessel to prevent flow of the electrolyte material between the plurality of electrical energy cells while permitting flow of vapor in the pressure vessel between the plurality of electrical energy cells.

18. The device of claim 17, wherein the pressure vessel includes at least one pressure relief valve.

19. The device of claim 17, wherein the pressure vessel is configured to withstand a pressure of at least 300 psi.

20. The device of claim 17, wherein the pressure vessel includes a steel pipe constructed of steel having a gauge of at least schedule 80.

21. The device of claim 17, wherein the electrical energy storage cells are electrically coupled in series.

22. The device of claim 17, wherein the electrical energy storage cells are further comprises a separator located between the anode plate and the cathode plate.

23. The device of claim 22, wherein the anode plate, separator, and cathode plate are wound into a coil.

24. The device of claim 22, wherein the anode plate and the cathode plate are wound in an offset relationship so that one side edge of the anode plate extends beyond one side edge of the cathode plate at one side of the coil, and another side edge of the cathode plate extends beyond another side edge of the anode plate at another side edge of the coil.

25. The device of claim 17, further comprising

at least one casing in the pressure vessel, the casing containing at least one of the electrical energy cells and including a vent for permitting flow of vapor from the casing; and

a plurality of seals for preventing flow of the electrolyte material between the plurality of electrical energy cells.

26. An electrical energy storage device, comprising:

a plurality of electrical energy cells including at least a first electrical energy storage cell and a second electrical energy storage cell electrically coupled to one another, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material,

wherein each of the electrical energy storage cells comprises a coil winding including the anode plate and the cathode plate;

a pressure vessel containing the electrical energy cells; and

at least one current collector positioned between the first and second electrical energy storage cells for conducting electrical current between the first electrical energy storage cell and the second electrical energy storage cell, the current collector being contained in the pressure vessel and being configured to limit flow of the electrolyte material between the first and second electrical energy storage cells,

wherein each of the first and second electrical energy cells is not contained in another pressure vessel separate from said pressure vessel containing the electrical energy cells.

27. The device of claim 26, wherein each of the electrical energy storage cells further comprises a separator located between the anode plate and the cathode plate.

28. The device of claim 27, wherein the anode plate and the cathode plate are wound in an offset relationship so that one side edge of the anode plate extends beyond one side edge of the cathode plate at one side of the coil, and another side edge of the cathode plate extends beyond another side edge of the anode plate at another side edge of the coil.

29. The device of claim 26, further comprising a seal between the current collector and the pressure vessel, the seal limiting the flow of the electrolyte material between the first and second electrical energy cells.

30. The device of claim 29, wherein the seal comprises an O-ring disposed about an outer periphery of the current collector.

31. The device of claim 26, wherein the current collector includes a first side and a second side, the first side of the current collector being in direct contact with the first electrical energy storage cell.

32. The device of claim 31, wherein the first side of the current collector includes a plurality of protrusions contacting multiple locations on the first electrical energy storage cell.

33. The device of claim 31, further comprising a current conductor extending from the second side of the current collector, the current conductor conducting electrical current between the first electrical energy storage cell and the second electrical energy storage cell.

34. The device of claim 31, wherein the first side of the current collector is in direct contact with the anode plate of the first electrical energy storage cell and wherein the second side of the current collector is in direct contact with the cathode plate of the second electrical energy storage cell.

35. The device of claim 34, wherein the first side of the current collector includes a plurality of protrusions contacting multiple locations on the anode plate of the first electrical energy storage cell, and wherein second side of the current collector includes a plurality of protrusions contacting multiple locations on the cathode plate of the second electrical energy storage cell.

36. An electrical energy storage device, comprising:

a plurality of electrical energy storage cells including at least a first electrical energy storage cell and a second electrical energy storage cell electrically coupled to one another, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material,

wherein each of the electrical energy storage cells comprises a coil winding including the anode plate and the cathode plate;

a pressure vessel containing the electrical energy storage cells; and

a plurality of current collectors, at least one of the current collectors being positioned between each adjacent pair of the electrical energy storage cells for conducting current between the adjacent pair of the electrical energy storage cells, the current collectors being configured to limit flow of the electrolyte material between the electrical energy storage cells,

wherein each of the first and second electrical energy cells is not contained in another pressure vessel separate from said pressure vessel containing the electrical energy cells.

37. The device of claim 36, wherein each of said current collectors comprises a solid member impervious to electrolyte flow therethrough.

38. The device of claim 36, further including a plurality of connector rods, each connector rod extending from one of the current collectors for transmitting electrical energy through the electric energy storage device.

39. The device of claim 38, further including a sleeve disposed about and electrically connecting two of the connector rods.

40. The device of claim 36, wherein at least one of the current collectors includes a first side in direct contact with a one of the electrical energy storage cells and a second side in direct contact with another of the electrical energy storage cells.

41. The device of claim 36, wherein at least one of the current collectors includes a first side in direct contact with the anode plate of one of the electrical energy storage cells and a second side in direct contact with the cathode plate of another of the electrical energy storage cells.

42. The device of claim 36, further comprising a plurality of seals in the pressure vessel, the seals limiting the flow of the electrolyte material between the current collectors and the pressure vessel.

43. The device of claim 36, wherein at least one side of the current collector includes protrusions for contacting one of the electrical energy storage devices in a plurality of locations.

44. An electric energy storage device, comprising:

a casing;

at least two electrically coupled coil windings disposed in the casing, each of the windings including a cathode plate, an anode plate, and a separator located between the cathode and anode plates;

electrolyte material located within the windings; and

at least one current collector disposed in the casing between the windings for conducting electric current between the windings, the current collector including a first side contacting the cathode plate of one of the windings and a second side facing in a direction opposite to the first side and contacting the anode plate of another of the windings, the current collector being configured to limit flow of the electrolyte material between the coiled windings.

45. The device of claim 44, wherein the cathode plate of each of the windings includes a strip having a pair of elongated side edges, wherein the anode plate of each of the windings includes a strip having a pair of elongated side edges, and wherein the cathode and anode plates are wound in an offset relationship so that one elongated side edge of the cathode plate extends beyond one elongated side edge of the anode plate at a first side of the windings, and the other elongated side edge of the anode plate extends beyond the other elongated side edge of the cathode plate at a second side of the windings opposite the first side.

46. The device of claim 45, wherein the extending elongated side edges extend beyond the nonextending elongated side edges by about 0.100 inches.

47. The device of claim 45, wherein said casing is disposed within a pressure vessel.

48. The device of claim 47, wherein said casing and said pressure vessel both have a substantially cylindrical shape.

49. The device of claim 45, wherein said casing comprises a pressure vessel.

50. The device of claim 44, wherein said current collector comprises a solid member impervious to electrolyte flow therethrough.

51. The device of claim 44, wherein said current collector includes an electrical conductor having a series of protrusions for electrically contacting multiple locations on an adjacent side of one of the windings.

52. The device of claim 51, wherein said protrusions are ridges.

53. The device of claim 52, wherein said ridges extend into and deform the adjacent side of the winding at a plurality of locations to thereby electrically contact corresponding ones of said plates.

54. The device of claim 52, wherein each of said ridges has a width and a peak to valley height, the ridge width being about twice as great as the ridge height, the elongated side edges of the anode and cathode plates at a given side of the winding being offset in a direction parallel to a central axis of the winding by an amount about three times as great as the ridge height.

55. The device of claim 52, wherein each of said ridges has a peak to valley height of at least about 0.030 inches and a width of at about 0.060 inches, the cathode and anode plates being offset by about 0.100 inches so that the ridges extend into and deform the winding side at least about 0.050 inches.

56. The device of claim 44, wherein said separator is compressed substantially uniformly throughout the wanding, an amount of compression of the separator varying by no more than 10% from a first portion of the winding at a center portion thereof to a second portion of the winding at an outer region thereof.

57. The device of claim 44, wherein said anode plate is constructed of a single strip of material.

58. The device of claim 44, wherein said cathode plate is constructed of a single strip of material.

59. The device of claim 44, wherein said separator is constructed of a single strip of material.

60. The device of claim 44, wherein the cathode plate is at least twice as thick as the anode plate.

61. The device of claim 44, wherein the anode plate is at least twice as thick as the cathode plate.

62. The device of claim 44, wherein each of the windings defines a hole therethrough along a longitudinal axis, a ratio of the diameter of the winding to the diameter of the hole being greater than about 6 to 1.

63. The device of claim 44, further including a seal member disposed about an outer periphery of the current collector for precluding flow of the electrolyte material between the current collector and the casing.

64. The device of claim 44, wherein said windings are electrically connected in series.

65. The device of claim 44, wherein said casing includes a plurality of vent openings, each vent opening corresponding to one of the windings.

66. The device of claim 44, further including a plurality of said casings disposed within a pressure vessel, each casing housing a plurality of said windings, an amount of said electrolyte material, and a plurality of said current collectors.

67. The device of claim 66, wherein each of said casings has a substantially cylindrical shape and defines a longitudinal axis, said pressure vessel being configured to hold the casings in a honeycomb arrangement so that the longitudinal axes are parallel.

68. The device of claim 66, wherein each of said casings has a substantially cylindrical shape and defines a longidudinal axis, said pressure vessel being configured to hold the casings so that the longitudinal axes are parallel and coplanar.

69. An electrical energy storage device, comprising:

a plurality of electrical energy cells including at least a first electrical energy storage cell and a second electrical energy storage cell electrically coupled to one another, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material;

a pressure vessel containing the electrical energy cells; and

at least one current collector positioned between the first and second electrical energy storage cells for conducting electrical current between the first electrical energy storage cell and the second electrical energy storage cell, the current collector being contained in the pressure vessel and being configured to limit flow of the electrolyte material between the first and second electrical energy storage cells,

wherein each of the first and second electrical energy cells is not contained in another pressure vessel separate from said pressure vessel containing the electrical energy cells, and

wherein the electrical energy storage device is configured such that vapor flow from the first electrical energy cell to the second electrical energy storage cell is permitted.

70. The device of claim 69, wherein the first and second electrical energy storage cells are sealed from one another such that flow of the electrolyte material between the first and second electrical energy cells is prevented.

71. An electrical energy storage device, comprising:

a plurality of electrical energy storage cells including at least a first electrical energy storage cell and a second electrical energy storage cell electrically coupled to one another, each of the electrical energy storage cells comprising an anode plate, a cathode plate, and electrolyte material;

a pressure vessel containing the electrical energy storage cells; and

a plurality of current collectors, at least one of the current collectors being positioned between each adjacent pair of the electrical energy storage cells for conducting current between the adjacent pair of the electrical energy storage cells, the conducting collectors being configured to limit flow of the electrolyte material between the electrical energy storage cells,

wherein each of the first and second electrical energy cells is not contained in another pressure vessel separate from said pressure vessel containing the electrical energy cells, and

wherein the electrical energy storage device is configured such that vapor flow from the first electrical energy cell to the second electrical energy storage cell is permitted.

72. The device of claim 71, wherein the first and second electrical energy storage cells are sealed from one another such that flow of the electrolyte material between the first and second electrical energy cells is prevented.