Electric double layer capacitor having a separation wall

• US 6,046,903 A
• Filed: 07/16/1998
• Issued: 04/04/2000
• Est. Priority Date: 07/18/1997
• Status: Expired due to Fees

• Current Assignee: NEC Tokin Corporation (Yageo Corporation)
• Original Assignee: NEC Corporation
• Inventors: Inoue, Yoshiki, Inagawa, Masako
• Primary Examiner(s): Kincaid, Kristine
• Assistant Examiner(s): Dinkins, Anthony
• Application Number:
  US09/116,568
• Time in Patent Office: 628 Days
• Field of Search: 361/502, 361/503, 361/504, 361/511, 361/512
• US Class Current: 361/502
• CPC Class Codes: H01G 11/10 Multiple hybrid or EDL capacitors, e.g. arrays or modules housings, cases, encapsulations or mountings thereof H01G11/78
• CPC Class Codes: H01G 11/80 Gaskets; Sealings
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

The present invention provides an electric double layer capacitor including: a gasket; a pair of collectors tightly fitted with the gasket to form a tightly sealed internal space; and polarizable electrodes with an electrolyte solution being accommodated in the tightly sealed inner space, wherein the gasket has at least a separation wall which separates the internal space into at least two sub-spaces, so that each of the sub-spaces accommodates a pair of the polarizable electrodes and the electrolyte solution.

Claims

1. An internal structure of a gasket for an electric double layer capacitor, wherein said internal structure of said gasket has at least a separation wall which separates an internal space of said gasket into at least two sub-spaces, wherein each of said sub-spaces accommodates a pair of polarizable electrodes and an electrolyte solution.

2. The internal structure of said gasket as claimed in claim 1, wherein said separation wall extends along a direction vertical to a plane parallel to which collector plates are provided to define a sealed inner space in combination with said gasket.

3. The internal structure of said gasket as claimed in claim 2, wherein said separation wall comprises a single flat wall to form two generally rectangular-parallelepiped sub-spaces.

4. The internal structure of said gasket as claimed in claim 2, wherein said separation wall comprises a plurality of flat walls to form at least three generally rectangular-parallelepiped sub-spaces.

5. The internal structure of said gasket as claimed in claim 2, wherein said separation wall comprises at least a prism-shaped wall to form at least two co-axially aligned prism-shaped sub-spaces.

6. The internal structure of said gasket as claimed in claim 2, wherein said separation wall comprises at least a cylindrically-shaped wall to form at least two co-axially aligned cylindrically-shaped sub-spaces.

7. The internal structure of said gasket as claimed in claim 1, wherein different kinds of said electrolyte solution are contained in said sub-spaces.

8. The internal structure of said gasket as claimed in claim 7, wherein said different kinds of said electrolyte solution comprise different hydraulic electrolyte solutions.

9. The internal structure of said gasket as claimed in claim 7, wherein said different kinds of said electrolyte solution comprise an organic electrolyte solution and a hydraulic electrolyte solution.

10. The internal structure of said gasket as claimed in claim 1, wherein at least an inner wall portion of said gasket and at least surface regions of said separation wall are made of an insulating material.

11. An electric double layer capacitor comprising:

a gasket;

a pair of collectors tightly fitted with said gasket to form a tightly sealed internal space; and

polarizable electrodes with an electrolyte solution being accommodated in said tightly sealed inner space,

wherein said gasket has at least a separation wall which separates said internal space into at least two sub-spaces, wherein each of said sub-spaces accommodates a pair of said polarizable electrodes and said electrolyte solution.

12. The electric double layer capacitor as claimed in claim 11, wherein said separation wall extends along a direction vertical to a plane parallel to which collector plates are provided to define said tightly sealed inner space in combination with said gasket.

13. The electric double layer capacitor as claimed in claim 12, wherein said separation wall comprises a single flat wall to form two generally rectangular-parallelepiped sub-spaces.

14. The electric double layer capacitor as claimed in claim 12, wherein said separation wall comprises a plurality of flat walls to form at least three generally rectangular-parallelepiped sub-spaces.

15. The electric double layer capacitor as claimed in claim 12, wherein said separation wall comprises at least a prism-shaped wall to form at least two co-axially aligned prism-shaped sub-spaces.

16. The electric double layer capacitor as claimed in claim 12, wherein said separation wall comprises at least a cylindrically-shaped wall to form at least two co-axially aligned cylindrically-shaped sub-spaces.

17. The electric double layer capacitor as claimed in claim 11, wherein different kinds of said electrolyte solution are contained in said sub-spaces.

18. The electric double layer capacitor as claimed in claim 17, wherein said different kinds of said electrolyte solution comprise different hydraulic electrolyte solutions.

19. The electric double layer capacitor as claimed in claim 17, wherein said different kinds of said electrolyte solution comprise an organic electrolyte solution and a hydraulic electrolyte solution.

20. The electric double layer capacitor as claimed in claim 11, wherein at least an inner wall portion of said gasket and at least surface regions of said separation wall are made of an insulating material.

21. The electric double layer capacitor as claimed in claim 11, wherein said polarizable electrodes in the form of each pair are separated by a separator from each other.

22. The electric double layer capacitor as claimed in claim 11, wherein said polarizable electrodes in the form of each pair are distanced from each other so that said polarizable electrodes are electrically insulated from each other.

23. The electric double layer capacitor as claimed in claim 11, wherein said polarizable electrodes are spaced apart from an inner wall of said gasket.

24. The electric double layer capacitor as claimed in claim 11, wherein said polarizable electrodes are in contact with an inner wall of said gasket.

26. The electric double layer capacitor as claimed in claim 24, wherein said separation wall comprises a single flat wall to form two generally rectangular-parallelepiped sub-spaces.

27. The electric double layer capacitor as claimed in claim 24, wherein said separation wall comprises a plurality of flat walls to form at least three generally rectangular-parallelepiped sub-spaces.

28. The electric double layer capacitor as claimed in claim 24, wherein said separation wall comprises at least a prism-shaped wall to form at least two co-axially aligned prism-shaped sub-spaces.

29. The electric double layer capacitor as claimed in claim 24, wherein said separation wall comprises at least a cylindrically-shaped wall to form at least two co-axially aligned cylindrically-shaped sub-spaces.

30. The electric double layer capacitor as claimed in claim 24, wherein different kinds of said electrolyte solution are contained in said sub-spaces.

31. The electric double layer capacitor as claimed in claim 29, wherein said different kinds of said electrolyte solution comprise different hydraulic electrolyte solutions.

32. The electric double layer capacitor as claimed in claim 29, wherein said different kinds of said electrolyte solution comprise an organic electrolyte solution and a hydraulic electrolyte solution.

33. The electric double layer capacitor as claimed in claim 24, wherein at least an inner wall portion of said gasket and at least surface regions of said separation wall are made of an insulating material.

34. The electric double layer capacitor as claimed in claim 24, wherein said polarizable electrodes in the form of each pair are separated by a separator from each other.

35. The electric double layer capacitor as claimed in claim 24, wherein said polarizable electrodes in the form of each pair are distanced from each other so that said polarizable electrodes are electrically insulated from each other.

36. The electric double layer capacitor as claimed in claim 24, wherein said polarizable electrodes are spaced apart from an inner wall of said gasket.

37. The electric double layer capacitor as claimed in claim 24, wherein said polarizable electrodes are in contact with an inner wall of said gasket.

25. An electric double layer capacitor comprising:

a frame-shaped gasket having opposite opening sides distanced in a first direction;

a pair of flat plate collectors extending in parallel to a plane vertical to said first direction and said flat plate collectors being tightly fitted with said gasket to form a tightly sealed internal space; and

porous polarizable electrodes with an electrolyte solution being accommodated in said tightly sealed internal space,

wherein said gasket has at least a separation wall extending in parallel to said first direction and said separation wall separates said internal space into at least two sub-spaces, wherein each of said sub-spaces accommodates a pair of said polarizable electrodes and said electrolyte solution.