Electric double layer capacitor

Abstract

An electric double layer capacitor comprises an electrode, a current collector, an electrolyte, a separator, a concave-shaped container for accommodating them, and a sealing plate for sealing an opening part of the container, wherein the sealing plate is fitted inside the container.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a figure describing an electric double layer capacitor of the first example.

FIG. 2 is a figure describing an electric double layer capacitor of the second example.

FIG. 3 is a figure describing an electric double layer capacitor of the third example.

FIG. 4 is a figure describing an electric double layer capacitor of the fourth example.

FIG. 5A, FIG. 5B, and FIG. 5C are figures describing an electric double layer capacitor 500 of the fifth example. FIG. 5A is a plan view of the capacitor 500, FIG. 5B is the A-A′ (see FIG. 5A) cross-sectional view of the capacitor 500, and FIG. 5C is the B-B′ (see FIG. 5A) cross-sectional view of the capacitor 500.

FIG. 6 is a figure describing an electric double layer capacitor of the first comparative example.

FIG. 7A, FIG. 7B, and FIG. 7C are figures describing the electric double layer capacitor 800 of the sixth example. FIG. 7A is a plan view of the capacitor 800, FIG. 7B is the A-A′ (see FIG. 7A) cross-sectional view of the capacitor 800, and FIG. 7C is the B-B′ (see FIG. 7A) cross-sectional view of the capacitor 800.

FIG. 8A, FIG. 8B, and FIG. 8C are figures describing the electric double layer capacitor 900 of the seventh example. FIG. 8A is a plan view of the capacitor 900, FIG. 8B is the A-A′ (see FIG. 8A) cross-sectional view of the capacitor 900, and FIG. 8C is the B-B′ (see FIG. 8A) cross-sectional view of the capacitor 900.

Claims

1. An electric double layer capacitor, comprising: an electrode body comprising a separator formed between a pair of electrodes;an electrolyte;a concave-shaped container for containing the electrode body and the electrolyte;and a sealing plate for sealing an opening part of the container,wherein the sealing plate is fitted inside the container.

2. The capacitor of claim 1, wherein the container is made of ceramics.

3. The capacitor of claim 1, wherein the sealing plate is made of a metal.

4. The capacitor of claim 3, wherein a part of a side surface of the sealing plate is exposed from the container.

5. The capacitor of claim 1, further comprising an external connecting terminal placed on a surface of the wall portion of the container,wherein the terminal penetrates the wall portion, and is electrically connected to the one of the electrodes of the pair of the electrodes.

6. The capacitor of claim 1, further comprising a metal layer formed on an internal surface of the container,wherein the sealing plate is fitted to the container so that a surface of the sealing plate contacts the metal layer, andthe surface of the sealing plate and the metal layer are welded.

7. The capacitor of claim 5, further comprising a metal layer formed on an internal surface of the container,wherein the sealing plate is fitted to the container so that a surface of the sealing plate contacts the metal layer, andthe external connecting terminal and the metal layer are electrically connected.

8. The capacitor of claim 4, wherein a meeting part of an internal surface and an upper surface of the container is formed in a tapered shape.