JPS59188115A - Electric double layer capacitor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention relates to an electric double layer capacitor that utilizes an electric double layer formed at the interface between a polarizable electrode and an electrolyte and has a farad-order capacitance. The aim is to improve this through a new series connection and expand the applications of electric double layer capacitors.

An electric double layer capacitor utilizes an electric double layer formed at the interface between a polarizable electrode and an electrolyte.As shown in Figure 1, a carbon electrode 1 made of graphite, carbon black, activated carbon, a binder, etc. It is constructed by interposing a porous separator 3 impregnated with an electrolyte between electrodes constructed by adhering a metal current collector plate 2 to a metal current collector plate 2.

Compared to an aluminum electrolytic capacitor that uses an aluminum oxide film as a dielectric, this electric double layer capacitor has a dielectric layer that is a few times thinner (148/cm), and the facing area is only a few nX/y. 700-1400m against
”/fl, and as a result, a capacitance of farad order can be obtained.The polarizable electrodes of this electric double layer capacitor are as shown in Fig. 2(a).
Rubber-like and fluid carbon electrode material 1 is uniformly and firmly applied to a metal current collector plate such as smooth aluminum foil Φ), roughened aluminum foil (c), hunting metal (d), expanded metal (e), etc. Figure 2 (
f). Cut this to the specified size,
It is constructed by connecting the drawer leads 4 as shown in FIG. This electrode 5,6' and a porous separator 3 impregnated with an electrolyte are interposed therebetween, and are wound as shown in FIG. 4 to form a cylindrical capacitor element 6.
As shown in the figure, the container is housed in a container 7 made of metal or resin, sealed with a rubber backing 8 and sealing resin 9, and covered with a sleeve 10.

By the way, this type of electric double layer capacitor has the disadvantage that its withstand voltage is extremely low compared to conventional capacitors because it utilizes natural electrochemical phenomena. . Traditionally, this drawback has been addressed by connecting individual products in series. However, considering the materials and man-hours that are common to each product, both manufacturers and users tend to prefer a single product.

The present invention solves such conventional problems, and the electric double layer capacitor according to the present invention will be explained below using the drawings of FIGS. 6 to 1o, and one embodiment of the present invention will be shown in FIG. In the figure, 11 is a single capacitor having the structure shown in FIG.
12 is a storage chamber 12 into which this single capacitor 111 is inserted.
This containment vessel 1 is a cylindrical containment vessel made of synthetic resin as shown in FIG.
A single capacitor 11 is inserted into each of the two storage chambers 12a. Reference numeral 13 denotes a terminal plate to which the drawer portion 4 of the capacitor units 11 is attached, and a plurality of capacitor units 11 are connected in series through this terminal plate 13. 1
4 is an external lead attached to this terminal board 13. 15
is a metal container as an outer container, and this metal container 16
A single capacitor 1 is stored in a containment vessel 12 inside
1 is housed, the opening is closed by the terminal plate 13, and the terminal plate 13 is filled with sealing resin 16. 17 is a covering sleeve.

That is, in the present invention, a plurality of individual capacitors 11 are made into blocks by the containment vessel 12, and according to the present invention, the containment chamber 1 of the containment vessel 12 is
A single capacitor 1 can be created by simply providing 2a in various configurations.
1 can be made into blocks according to the purpose of use, and since the single capacitor 11 can be handled with the capacitor 11 inserted into the storage chamber 12a of the storage container 12 during assembly, assembly is also facilitated. Furthermore, after storing the capacitor unit 11 in the metal container 15, resin is filled and the capacitor unit 1 is
1, the use of the containment vessel 12 not only provides better workability, but also reduces the number of man-hours and allows for lower costs.

By the way, in the above embodiment, the metal container 15 was used separately from the containment container 12, but the metal container 16 may be omitted by using the containment container as an outer container.

Examples in that case are shown in FIGS. 8 and 9,
The embodiment shown in FIGS. 8 and 9 uses a synthetic resin outer container 18 having a plurality of storage chambers 18a as shown in FIG. 10, and the embodiment shown in FIG. In this example, the drawer part 14 is drawn out from the bottom of the outer container 18, unlike the above embodiment. In the embodiment shown in FIG. 9, it is possible to connect the drawer portion 4 of the capacitor unit 11 and the external lead 14 to the terminal plate 13 at the same time.

As described above, according to the present invention, it is possible to easily form a single capacitor into a block, thereby obtaining an electric double layer capacitor that does not have the problem of low withstand voltage, and has good workability. Moreover, the excellent effect of being able to assemble with a small number of man-hours can be obtained.

[Brief explanation of the drawing]

Figure 1 is a basic configuration diagram of an electric double layer capacitor, Figure 2 (
a) to (f) are explanatory diagrams for explaining the method for obtaining the electrodes of the same capacitor, FIGS. 3 to 6 are process diagrams showing the manufacturing process of the same capacitor, and FIG. 6 is one of the methods of the present invention. FIG. 7 is a front view showing a partial cross section of an electric double layer capacitor according to an embodiment; FIG. 7 is a perspective view showing main parts of the capacitor; FIG.
FIG. 9 and FIG. 9 are a front view and a first partial cross-sectional view of an electric double layer capacitor according to another embodiment of the present invention, respectively.
Figure 0 is a perspective view showing the main parts of the same capacitor. 5.5'...electrode, 6...capacitor element,
7... ...Container, 11...Kyapunk unit, 12...
...Containment vessel, 12a, 18a...Storage chamber,
15...Metal container, 18...Outer container. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure J53 Figure 4 Figure 6 Figure 9

Claims (2)

[Claims] (1) In an electric double layer capacitor that utilizes an electric double layer formed at the interface between a polarizable electrode and an electrolyte, a single capacitor is constructed by sealing a capacitor element with an electrolyte interposed between a pair of electrodes. An electric double layer capacitor in which a plurality of single capacitors are stored in a synthetic resin storage container having a plurality of storage chambers into which the single capacitors can be inserted, connected in series, and packaged; (2) The electric double layer capacitor according to claim 1, which uses a storage container as an outer container.