Non-aqueous electrolyte cells and electric double layer capacitors

• US 20010012193A1
• Filed: 01/23/2001
• Published: 08/09/2001
• Est. Priority Date: 02/04/2000
• Status: Active Grant

• Current Assignee: Shunji Watanabe, Tsugio Sakai
• Original Assignee: Seiko Instruments Incorporated (Seiko Group)
• Inventors: Watanabe, Shunji, Sakai, Tsugio
• Granted Patent: US 6,445,566 B2
• Time in Patent Office: Days
• US Class Current: 361/502
• CPC Class Codes: H01G 11/04 Hybrid capacitors
• CPC Class Codes: H01G 11/56 Solid electrolytes, e.g. gels; Additives therein
• CPC Class Codes: H01G 11/74 Terminals, e.g. extensions of current collectors
• CPC Class Codes: H01G 11/80 Gaskets; Sealings
• CPC Class Codes: H01G 11/82 Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
• CPC Class Codes: H01M 50/117 Inorganic material
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/1243 characterised by the internal coating on the casing
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An electric double layer capacitor affords cost reduction and miniaturization. In a non-aqueous electrolyte cell and an electric double layer capacitor, which are composed of active materials used as a cathode and an anode, and a container for receiving the materials and an electrolyte, the storage container is composed of a concave-shaped container 101 and a sealing plate 102, and first and second collectors disposed in the container are electrically connected to joining terminals A103, B104 disposed on an outer bottom surface and/or sides of the container, the joining terminals A103, B104 being made integral with the storage container.

Claims

1. A non-aqueous electrolyte cell having active materials used as a cathode and an anode, and a container for receiving the materials and an electrolyte, comprising

the container is composed of a concave-shaped container and a sealing plate, and the concave-shaped container is provided on an inner bottom surface thereof with a first collector, which is electrically connected to a joining terminal A disposed on an outer bottom surface and/or sides of the concave-shaped container, the sealing plate being provided on a surface inside the cell with a second collector, which is electrically connected to a joining terminal B disposed on an outer bottom surface and/or sides of the concave-shaped container.

2. The non-aqueous electrolyte cell according to

claim 1

, wherein the concave-shaped container of the receiving container is selected from heat resisting resins, glass, ceramics or ceramic glass, and the first collector is provided on the inner bottom surface of the concave-shaped container and electrically connected to a joining terminal A disposed on the outer bottom surface of the concave-shaped container, the concave-shaped container being formed on an edge thereof with a metallic layer, which is electrically connected to a joining terminal B disposed on the outer bottom surface of the concave-shaped container, and wherein a sealing surface on a top of the concave-shaped container is sealed by the sealing plate, which has a metallic portion serving as the second collector and the joining terminal.

3. The non-aqueous electrolyte cell and an electric double layer capacitor according to

claim 1

, wherein the first collector and the joining terminals disposed on the concave-shaped container of the receiving container and the metallic layer on the edge of the container are composed of a material having a main component which is a metal selected from tungsten, nickel, silver, platinum or gold.

4. The non-aqueous electrolyte cell according to

claim 1

, wherein surfaces on those portions of the joining terminals, which are exposed outside the receiving container, are provided with nickel, gold or solder.

5. The non-aqueous electrolyte cell according to

claim 2

wherein the concave-shaped container and the sealing plate are sealed by interposing a brazing material or a solder material between the concave-shaped container and the sealing plate and heating them.

6. The non-aqueous electrolyte cell according to

claim 1

, wherein the electrolyte is solid or gel.

8. The electric double layer capacitor according to

claim 1

, wherein the concave-shaped container of the receiving container is selected from heat resisting resins, glass, ceramics or ceramic glass, and the first collector is provided on the inner bottom surface of the concave-shaped container and electrically connected to a joining terminal A disposed on the outer bottom surface of the concave-shaped container, the concave-shaped container being formed on an edge thereof with a metallic layer, which is electrically connected to a joining terminal B disposed on the outer bottom surface of the concave-shaped container, and wherein a sealing surface on a top of the concave-shaped container is sealed by the sealing plate, which has a metallic portion serving as the second collector and the joining terminal.

9. The electric double layer capacitor according to

claim 1

, wherein the first collector and the joining terminals disposed on the concave-shaped container of the receiving container and the metallic layer on the edge of the container are composed of a material having a main component which is a metal selected from tungsten, nickel, silver, platinum or gold.

10. The electric double layer capacitor according to

claim 1

, wherein surfaces on those portions of the joining terminals, which are exposed outside the receiving container, are provided with nickel, gold or solder.

11. The electric double layer capacitor according to

claim 2

wherein the concave-shaped container and the sealing plate are sealed by interposing a brazing material or a solder material between the concave-shaped container and the sealing plate and heating them.

12. The electric double layer capacitor according to

claim 1

, wherein the electrolyte is solid or gel.

7. An electric double layer capacitor having active materials used as a cathode and an anode, and a container for receiving the materials and an electrolyte, comprising

the container is composed of a concave-shaped container and a sealing plate, and the concave-shaped container is provided on an inner bottom surface thereof with a first collector, which is electrically connected to a joining terminal A disposed on an outer bottom surface and/or sides of the concave-shaped container, the sealing plate being provided on a surface inside the cell with a second collector, which is electrically connected to a joining terminal B disposed on an outer bottom surface and/or sides of the concave-shaped container.