Process and apparatus for recovering components of sealed type battery

• US 6,329,096 B2
• Filed: 03/05/1997
• Issued: 12/11/2001
• Est. Priority Date: 03/05/1996
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kawakami, Soichiro, Asao, Masaya, Kobayashi, Naoya
• Primary Examiner(s): KALAFUT, STEPHEN J
• Application Number:
  US08/811,220
• Publication Number:
  US 20010008723A1
• Time in Patent Office: 1,742 Days
• Field of Search: H01/M.652, H01/M 1.054, 429/49, 429/53
• US Class Current: 429/49
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/06 Lead-acid accumulators semi-lead accumulators H01M10/20
• CPC Class Codes: H01M 10/30 Nickel accumulators H01M10/34 takes precedence
• CPC Class Codes: H01M 10/345 Gastight metal hydride accumulators
• CPC Class Codes: H01M 10/54 Reclaiming serviceable parts of waste accumulators
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02W 30/84 Recycling of batteries or fuel cells

Abstract

A recovering process for recovering the constituent components of a sealed type battery comprising at least a cathode, an anode and an electrolyte sealed in a battery housing, characterized in that said process includes a step (a) of decreasing the ionic conductivity between said cathode and anode of said sealed type battery and a step (b) of opening said battery housing of the sealed type battery after conducting said step (a). An apparatus suitable for practicing said recovering process.

Claims

1. A process for recovering the constituent components of a sealed battery comprising at least a cathode, an anode and an electrolyte sealed in a battery housing, wherein said electrolyte comprises a solution which comprises a solvent and said electrolyte is positioned between said cathode and said anode, comprising a step (a) of transporting said electrolyte solution or the solvent of said electrolyte solution from inside said battery housing to outside said battery housing to decrease the conductance between said cathode and said anode of said sealed battery and a step (b) of opening said battery housing of the sealed battery after conducting said step (a).

2. The process according to claim 1, wherein the sealed battery has a safety vent, and a differential pressure between the inside and the outside of the battery housing actuates said safety vent extracting the electrolyte solution or the solvent of the electrolyte solution through said safety vent to the outside of the battery housing.

3. The process according to claim 2, wherein a portion of the sealed battery where the safety vent is provided is positioned to face in a downward direction and the electrolyte solution or the solvent of the electrolyte solution is extracted through the safety vent to the outside of the battery housing.

4. The process according to claim 1, wherein the electrolyte solution or the solvent of the electrolyte solution extracted outside the battery housing is recovered.

11. The process according to claim 1, 5 or 6, wherein the step of opening the battery housing of the sealed battery is conducted in an incombustible atmosphere.

12. The process according to claim 11, wherein the incombustible atmosphere comprises a gas selected from the group consisting of nitrogen, argon, helium, carbon dioxide, steam and a fluorocarbon.

14. The process according to claim 1, 5 or 6, wherein the step of opening the battery housing of the sealed battery is conducted with a cutting method selected from the group consisting of high pressure water cutting, laser beam cutting and mechanical cutting.

15. The process according to claim 14, wherein the high pressure water cutting comprises spraying water under a high pressure and containing an abrasive through a jet nozzle.

16. The process according to any of claims 1, 5, or 6, wherein the sealed battery is a lithium battery in which oxidation-reduction reaction of lithium ion occurs.

17. The process according to any of claims 1, 5, or 6, wherein the sealed battery is a nickel-metal hydride battery in which oxidation-reduction reaction of hydrogen ion is used and a hydrogen storage alloy is used as an anode material.

18. The process according to any of claims 1, 5, or 6, wherein the sealed battery is a nickel-cadmium battery.

19. The process according to any of claims 1, 5, or 6, wherein the sealed battery is a lead-acid battery.

20. The process according to claim 16 which further includes a step of reacting a reacting agent with an active lithium contained in the lithium battery to decrease the reactivity of said active lithium after the step of opening said battery housing.

21. The process according to claim 20, wherein the reacting agent comprises one or more materials selected from the group consisting of water, alcohols, acids, and carbon dioxide.

22. The process according to claim 16 which further includes a step of washing the opened lithium battery using an organic solvent after the step of opening said battery housing.

23. The process according to claim 22, wherein the organic solvent is an organic solvent incapable of producing an azeotrope with water.

24. The process according to claim 22 which further includes a step of dissociating the sealed battery into individual battery components and recovering the constituent components of the sealed battery after the washing step using the organic solvent.

25. The process according to claim 1 or 6, wherein the sealed battery is sorted depending on the shape or the type prior to the step (a).

26. The process according to any of claims 1, 5, or 6, which further includes a step of discharging the residual electric capacity of the sealed battery prior to conducting the step of decreasing the conductance between said cathode and said anode of said sealed battery.

27. The process according to claim 26, wherein in the step of discharging the residual electric capacity, an energy discharged is recovered.

5. A process for recovering the constituent components of a sealed battery comprising at least a cathode, an anode and an electrolyte sealed in a battery housing, wherein said electrolyte comprises a solution which comprises a solvent and said electrolyte is positioned between said cathode and said anode, comprising a step (a) of sorting said sealed battery depending on the shape or the type, a step (b) of decreasing the conductance between said cathode and said anode of said sealed battery by cooling said sealed battery to a temperature lower than the freezing point of said solvent of said electrolyte solution, and a step (c) of opening said battery housing of the sealed battery after conducting said step (b).

7. The process according to claim 5 or 6, wherein the sealed battery is cooled with a compressed incombustible gas selected from the group consisting of nitrogen, argon, helium, carbon dioxide, a fluorocarbon, or mixtures thereof.

8. The process according to claim 5 or 6, wherein the sealed battery is cooled by immersing the sealed battery in a cooling agent.

9. The process according to claim 8, wherein the cooling agent is a mixture of a dry ice and methanol or a mixture of a dry ice and ethanol.

10. The process according to claim 5 or 6, wherein the sealed battery is immersed in water, the sealed battery is frozen together with said water to seal the sealed battery in the ice produced and the sealed battery is opened while the sealed battery is sealed in the ice.

13. The process according to claim 7, wherein the step of opening said battery housing is conducted in an incombustible atmosphere composed of the same gas as that used in cooling the sealed battery.

6. A process for recovering the constituent components of a sealed battery comprising at least a cathode, an anode and a polymer solid electrolyte solidified using a solidifying polymer sealed in a battery housing, said polymer solid electrolyte being positioned between said cathode and said anode comprising a step (a) of decreasing the conductance between said cathode and said anode of said sealed battery by cooling said sealed battery to a temperature lower than the glass transition temperature of said solidifying polymer of said polymer solid electrolyte and a step (b) of opening said battery housing of the sealed battery after conducting said step (a).

28. An apparatus for recovering the constituent components of a sealed battery comprising at least a cathode, an anode and electrolyte comprising an electrolyte solution which comprises a solvent housed in a battery housing, said electrolyte being positioned between said cathode and said anode, said apparatus comprising a means (i) for decreasing the conductance between said cathode and said anode of said sealed battery and a means (ii) for opening said battery housing, said means (i) for decreasing the conductance comprising a liquid extraction means (i-a) for extracting said electrolyte solution or the solvent of said electrolyte solution outside said battery housing.

29. The apparatus according to claim 28, wherein the sealed battery has a capping provided with a safety vent, and the liquid extraction means (i-a) includes a means (i-b) for causing a differential pressure between the inside and the outside of the battery housing through said safety vent to actuate said safety vent to extract the electrolyte solution or the solvent of the electrolyte solution outside the battery housing.

30. The apparatus according to claim 29, wherein the means (i-b) comprises at least a vessel (i-c) capable of being evacuated and which is provided with an exhausting means.

31. The apparatus according to claim 30, wherein the vessel (i-c) has a member capable of tightly contacting or joining with an exterior wall face portion of the battery housing of the sealed battery, said exterior wall face portion comprising a portion of the capping, said portion including the neighborhood of the safety vent, and said member having an opening through which said exterior wall face portion is communicated with the vessel (i-c) so that the electrolyte solution or the solvent thereof in the sealed battery can be extracted through said member into the vessel (i-c).

32. The apparatus according to claim 30, wherein a passage capable of introducing air, nitrogen or inert gas is provided at the vessel (i-c) through a valve.

33. The apparatus according to claim 29, wherein a closed space comprising at least a part of an exterior wall face of the battery housing including the neighborhood of the safety vent and the vessel (i-c) is formed such that the safety vent is situated within said closed space and the internal pressure of said closed space can be decreased to be lower than the pressure inside the sealed battery, wherein the electrolyte solution or the solvent thereof in the sealed battery can be extracted into said closed space.

34. The apparatus according to claim 32, wherein the closed space is established after the internal pressure of the vessel (i-c) is decreased to be lower than the atmospheric pressure by means of an exhausting means.

35. The apparatus according to claim 33, wherein after the closed space is formed, the internal pressure of the closed space is decreased to be lower than that of the sealed battery by means of an exhausting means connected to the vessel (i-c).

42. The apparatus according to claim 28, 36 or 37, wherein the opening means includes a means to open the sealed battery in an incombustible atmosphere.

43. The apparatus according to claim 42, wherein the incombustible atmosphere comprises one or more gases selected from the group consisting of nitrogen, argon, helium, carbon dioxide, steam, and a fluorocarbon.

45. The apparatus according to claim 28, 36 or 37, wherein the opening means (iii) comprises a cutting means selected from the group consisting of high pressure water cutting, laser beam cutting and mechanical cutting.

46. The apparatus according to claim 45, wherein the high pressure water cutting means comprises a jet nozzle for spraying water containing an abrasive at high pressure through the jet nozzle.

47. The apparatus according to claim 28, 36 or 37, wherein the sealed battery is a lithium battery in which oxidation-reduction reaction of lithium ion is used.

48. The apparatus according to claim 28, 36 or 37, wherein the sealed battery is a nickel-metal hydride battery in which oxidation-reduction reaction of hydrogen ion is used and a hydrogen storage alloy is used as an anode material.

49. The apparatus according to claim 28, 36 or 37, wherein the sealed battery is a nickel-cadmium battery.

50. The apparatus according to claim 28, 36 or 37, wherein the sealed battery is a lead-acid battery.

51. The apparatus according to claim 47 which further includes a means for reacting a reacting agent with an active lithium contained in the lithium battery to decrease the reactivity of said active lithium after the lithium battery is opened.

52. The apparatus according to claim 51, wherein the reacting agent comprises one or more materials selected from the group consisting of water, alcohols, acids, and carbon dioxide.

53. The apparatus according to claim 28, 36 or 37 which further comprises a means for washing using an organic solvent after the sealed battery is opened.

54. The apparatus according to claim 53, wherein the organic solvent is an organic solvent incapable of producing an azeotrope with water.

55. The apparatus according to claim 53 which further comprises a means for recovering the constituent battery components after washing the opened battery using the organic solvent.

56. The apparatus according to claim 28 which further comprises a means for sorting the sealed battery depending on the shape or the type prior to decreasing the conductance between the cathode and the anode of said sealed battery.

57. The apparatus according to claim 28, 36 or 37 which further comprises a means for discharging the electric residual capacity of the sealed battery prior to decreasing the conductance between the cathode and the anode of said battery.

58. The apparatus according to claim 57, wherein the discharging means includes a means for recovering an energy discharged.

59. The apparatus according to claim 43, which further comprises a means for recovering the incombustible gas of the opening atmosphere and purifying the incombustible gas recovered to recycle.

61. The apparatus according to claim 54 which further comprises a means for recovering the constituent battery components after washing the opened battery with the use of the organic solvent.

36. An apparatus for recovering the constituent components of a sealed battery comprising at least a cathode, an anode and an electrolyte comprising an electrolyte solution which comprises a solvent housed in a battery housing, said electrolyte being positioned between said cathode and said anode, said apparatus comprising at least a means (i) for sorting said sealed battery depending on the shape or the type, a means (ii) for decreasing the conductance between said cathode and anode of said sealed battery, and a means (iii) for opening said battery housing, said means (ii) comprising a cooling means (ii-d) for cooling said sealed battery to a temperature lower than the freezing point of the solvent of said electrolyte solution.

38. The apparatus according to claim 36 or 37, wherein a compressed incombustible gas selected from the group consisting of nitrogen, argon, helium, carbon dioxide, a fluorocarbon, or mixtures thereof is used in the cooling means (ii-d).

39. The apparatus according to claim 36 or 37, wherein a cooling agent is used in the cooling means (ii-d).

40. The apparatus according to claim 39, wherein the cooling agent is a mixture of a dry ice and methanol or a mixture of a dry ice and ethanol.

41. The apparatus according to claim 36 or 37, wherein the cooling means (ii-d) is for immersing the sealed battery in water and freezing the sealed battery together with said water to seal the sealed battery in the ice produced, and the opening means (iii) is for opening the sealed battery sealed in the ice.

44. The apparatus according to claim 38, wherein the sealed battery is opened by means of the opening means (iii) in an incombustible atmosphere composed of the same gas as that used in cooling the sealed battery by means of the cooling means (ii-d).

60. The apparatus according to claim 38 which further comprises a means for recovering the gas used in cooling the sealed battery and purifying the gas recovered to recycle.

37. An apparatus for recovering the constituent components of a sealed battery comprising at least a cathode, an anode and an electrolyte comprising a polymer solid electrolyte solidified by a polymer housed in a battery housing, said electrolyte being positioned between said cathode and said anode, said apparatus comprising at least a means (i) for sorting said sealed battery depending on the shape or the type, a means (ii) for decreasing the conductance between said cathode and anode of said sealed battery, and a means (iii) for opening said battery housing, said means (ii) comprising a cooling means (ii-d) for cooling said sealed battery to a temperature lower than the glass transition temperature of said polymer of said polymer solid electrolyte.