JPH0499306A - Electric double layer capacitor - Google Patents

Abstract

PURPOSE:To execute a wrapping operation without using an auxiliary lead wire at the wrapping operation by a method wherein external electrodes are extracted to the same direction and the external electrodes are formed of round-wire metal leads. CONSTITUTION:A metal disk 8 which has been connected to an insulating case 6 by using an adhesive and to which an external electrode 5 formed of a round-wire metal lead has been connected by a welding operation or the like is arranged at the lower side of a laminated cell 1; a metal disk 9 which has been connected to an insulating case 7 by using an adhesive is arranged at the upper side of the cell. A 7-shaped metal case 2 is inserted, from the side of the external electrode 5, in the metal disk 8, the laminated cell and the metal disk 9 which have been piled up in this manner. While the metal disk 8, the laminated cell and the metal disk 9 are being pressurized, they are caulked, shaped and united in order to reduce a contact resistance between them. Then, an external electrode 4 is connected to the case 2 by a welding operation or the like in such a way that it is situated on the diagonal line to the external electrode 5. After that, a cylindrical insulating tube 3 is inserted in the case 2; the case is covered with the sleeve after the sleeve has been shrunk by using heat or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric double layer capacitor, and particularly to a method and shape of connecting a plurality of cells to external electrodes.

[Conventional technology]

Conventionally, this type of electric double layer capacitor is shown in Fig. 5(a).
As shown in the figure, the external electrodes 12 and 13 are electrodes on one side that mutually constitute the cell 1 through the case 101 and the disc 14;
Conductive current collecting electrode 16a.

16b, and the shape was a flat plate obtained by punching and bending a circular plate using a press or the like, as shown in FIG. 5(b).

[Problem to be solved by the invention]

External electrode 12 of the conventional electric double layer capacitor described above.
13 is generally in the shape of a flat plate made by punching and bending a thin plate using a press or the like, as shown in Figure 5(b).
In addition, since the length of the bent portion is limited because it is punched from the same disk, the external electrodes 12 and 13 can be assembled automatically by wrapping, as shown in Figures 6(a) and (b).
Unless the flat plate-shaped part is cut and connected to the auxiliary lead 15, such as a round wire, by welding or the like, and the external electrode is lengthened, it cannot be wrapped, which is currently popular, and automatic mounting cannot be performed. .

An object of the present invention is to provide an electric double layer capacitor that can be wrapped without using an auxiliary lead wire during wrapping.

[Means to solve the problem]

The electric double layer capacitor of the present invention has a structure in which external electrodes are led out in the same direction, and the external electrodes are formed with round metal leads, and can be wrapped.

〔Example〕

Next, the present invention will be explained with reference to the drawings. FIG. 1 is a longitudinal sectional view of an embodiment of the present invention. A plurality of cells 1 are stacked, and an external power source is connected to the bottom of the stacked cells to an insulating case 6 with an adhesive such as a bond! The metal disks 8.5 are stacked in such a manner that the metal disks 8 are connected by welding or the like, and the metal disks 9 are connected to the insulating case 7 with an adhesive such as bond and are placed above the cells. Insert the ff layered cell into the metal disk 9 from the LJ type gold metal case 2 external electric field fi5 side, and insert the metal disk 8. ff layered cell.

In order to reduce the contact resistance with the metal disk 9, it is caulked and integrated under pressure. Next, the external electrode i4 is connected to the case 2 by welding or the like so as to be diagonally on the external electrode 5, and then the cylindrical insulating sleeve 3 is inserted into the case 2.
Shrink it with heat etc. and cover it.

〔Effect of the invention〕

As explained above, the present invention has the effect that wrapping can be performed without using an auxiliary lead wire when lapping, compared to the conventional method, by having the external electrodes lead out in the same direction and using round wire leads. be.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an electric double layer capacitor according to an embodiment of the present invention, and FIGS. 2 and 3 are side views showing the connection state between the external electrode 4 and the case 2, and between the external electrode 5 and the lower metal disc. Fig. 4 is a perspective view for explaining the method of forming 12 cells, and Fig. 6 (a>, (b) is a cross section of a conventional example in which auxiliary lead wires are connected for conventional wrapping. They are a diagram and a partially cutaway side view. 1... Cell, 2... Metal case, 3... Insulating sleeve, 4... External electrode, 5... External electrode, 6...
Insulating case, 7... Insulating case, 8... Metal disc,
9...Metal disk, 10...Metal case, 11...
Insulator, 12... External electrode, 13... External electrode, 14... Disc, 15... Auxiliary lead wire, 16
a, 16b... Conductive current collecting electrode.

Claims (1)

[Claims] An electric double layer capacitor characterized in that external electrodes are led out in the same direction, and the external electrodes are formed of round metal leads to enable wrapping.