JPS59154014A - Electric double layer condenser and method of producing same - 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 and a method for manufacturing the same, and particularly to an improvement in the exterior structure.

One way to obtain a large capacity capacitor using the electric double layer phenomenon is to generate an electric double layer by bringing carbon powder into contact with an electrolytic solution, as disclosed in U.S. Pat. No. 3,536,963. There is something I did. FIG. 1 is a sectional view of an example of a conventional electric double layer capacitor. In the figure, numerals 1 and 2 refer to 4 as a top plate and bottom plate made of an elastic material (for example, conductive rubber), and 3 as a carbon paste made of activated carbon powder and a ``ME fibrous solute solution (e.g. wax, water dg). 4 is an ion-permeable, non-conductive porous separator, and 5 is a side wall made of an electrically insulating elastic material (for example, rubber). The upper tooth 1 and the bottom plate 2 serve as the electrodes of the capacitor. However, in this conventional electrician capacitor 6, the withstand voltage of the capacitor is 1! gas decomposition voltage of the electrolyte solution. Therefore, if it is desired to obtain a capacitor with a high withstand voltage, it is necessary to construct a capacitor of the above-mentioned two-layer capacitor 6 stacked on top of each other and connected with the capacitor 1j. This is a cross-sectional view of an example of an element laminate of a type electric double-layer capacitor.
corresponds to a single 1 iL double X-layer capacitor (hereinafter referred to as a basic cell) shown in FIG. 1, and n represents the stack of basic cells e required for the required withstand voltage. In such a conventional laminated structure, the contact resistance between basic cells and the contact paper 'M between activated carbon particles in the basic cells are large, and the internal resistance as a whole is excessive. Therefore, in order to optimize the internal resistance, a structure is used to maintain the pressure while applying appropriate pressure to the upper and lower surfaces of the laminate. As shown, after housing the laminated self, the electrode lead plates 9 and 10, and the insulating case ll' for the partition between the two electrode lead plates in the metal case 8, while applying a predetermined pressure to the top and bottom of the laminated self, Metal case 8-
The end portion 12t is tightened by drawing process to maintain a predetermined pressure applied to the laminated self.

However, with such a conventional pressure holding structure, when the length of the metal case 8 is one foot, it is not possible to absorb the height change of the laminated self under a predetermined pressure, and the end portion 12 of the metal case 8 is squeezed. Buckling occurred in the metal case 8 when it was processed. Furthermore, as the rated voltage increases, the number of layers of the laminated self also increases, making the product more sophisticated. Therefore, when all the products are mounted on the board, a wide space between the boards is required, which has an adverse effect of hindering the miniaturization of the device. Furthermore, the shape of the insulating case 11 + electrode leads 9,100 as exterior parts is complicated, and the price of the P1 component is high.

An object of the present invention is to provide an electric double layer capacitor and a method for manufacturing the same which solves the above conventional drawbacks.

According to the present invention, a first capacitor having electrode leads disposed in contact with both end surfaces of an electrician's N-layer capacitor element integrally formed. Second
of! An electrode plate, an insulating plate disposed on the outside of the Ml electrode plate, a clamping part that connects the second electrode plate and the insulator, and pressurizes and clamps the capacitor element stack; An electric double layer capacitor and a method for manufacturing the same are obtained, which are characterized by comprising a resin case that houses a pressure laminated element and is filled with resin.

Hereinafter, non-invention will be explained using a central flow example.

FIGS. 4(a) and 4(b) show an electrical system according to an embodiment of the present invention.
A cross-sectional view and a side view of a layer capacitor, Figure 4 (c
) is the f, :I, view of the element configuration ◎Figure 4(a)
As shown in K, disk-shaped electrode plates 15 and 16 are arranged at both ends of the laminated no-self in which the basic cells 6 are laminated in the number required for the required withstand voltage, and the laminated cells are uniformly pressurized and electrode leads 13 and 14 are provided. do. A disc-shaped insulating member 17 made of rubber or the like is inserted on the outside of the electrode plate, that is, at a position opposite to the laminated self, and a clamping tool 18t for maintaining a predetermined pressure applied to the laminated self is inserted on the outside of the insulating member 17 made of rubber or the like. This clamp A18 is provided with three cylindrical belt-shaped portions 19 projecting radially from a disc as shown in FIG.

FIG. 4(c) shows the arrangement of the clamping tool 18, in which a predetermined pressure is applied to the laminated self via the clamping tool 18 and the electrode plate 16 with a press machine, etc., and then the strip-shaped 19 and the IT electrode plate 16 are fixed by welding. ◎As for the method of fixing by welding, as shown in FIG. It is bent evenly toward the center of the circle 16 and welded at the welding point 21. (FIG. 4(b)) Also, without bending the tip portion 19a of the strip portion 19, the electrode plate 1
The strip portion 19i may be welded to the side surface in the thickness direction of the portion 6. At this time, a space 22 is provided so that the strip portion 19 and the side surface of the laminated self do not come into contact with each other, or an insulating layer is provided on the surface of the strip portion 19 located on the side surface of the layered self.

Next, the electrode leads 13 and 14 are made to protrude into the molded case 23 to house the capacitor element, and then a resin 24 is injected to carry out an exterior treatment.

As described above, the present invention is suitable for mass production because the configuration of components other than the laminated cell is simpler than that of conventional self-supporting electric double layer capacitors. Furthermore, since the product height when mounted on a board is horizontal determined by the diameter of the cell, it has the advantage that it does not change even if the number of stacked cells increases.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an example of a conventional electric double layer capacitor element. FIG. 2 is a cross-sectional view of an example of an element laminate of a conventional seeded electric double layer capacitor. Figure 3 is a cross-sectional view of a conventional self-supporting electric double layer capacitor. FIG. 4(a) is a sectional view of an electric double layer capacitor according to an embodiment of the present invention. FIG. 4(b) is a side view of an electric double layer capacitor according to an embodiment of the present invention. FIG. 4(Q) is a perspective view of an electric double layer capacitor element with a clamping tool according to an embodiment of the present invention. Figure O Figure 5 is a perspective view of the clamping tool used in the invention. 1... Jacket, 2... Bottom plate, 3...
... Conductive paste electrode, 4 ... Porous separator, 5 ... Side wall, 6 ... Basic cell, 7
......Laminated cell 8...Parallel case, 9
, 10... are pole lead plates, 11... are insulation cases, 12... are metal case ends, 13.1
4... Electrode lead, 15, 16... Electrode plate, 17... Insulating section, 18... Clamping tool, 19... Band shape Part, 19a...Tip of band-like part, 21...Welding point, 22...
・Gap, 23...Mold case, 24...
...Resin Omiru Kyou#2 Figure 3rd Agony ((Z) /qO (b) Kaya 4 Concave l/ 4th area (C) No. S mouth

Claims (2)

[Claims] (1)! A first electrode lead having electrode leads placed in contact with both end surfaces of the gas double layer capacitor element laminate. a second electrode plate, an insulating plate disposed outside the first electrode plate, a bridge between the second electrode plate and the insulating plate, and pressurizing the capacitor element laminate. - An electric double layer capacitor comprising a clamping part for clamping, and a resin case filled with resin and housing the pressurized laminated element. (2) A pair of conductive pastes separated by an ion-permeable and non-electronically conductive porous separator inside a container whose side walls are made of an electrically insulating elastic material and whose top cover and bottom plate are made of a conductive elastic material. a step of filling electrodes, a step of laminating one or more electric double layer capacitor elements using the outer jacket and the bottom plate as electrodes, and a first electrode lead having electrode leads on the upper lid side and the bottom plate side located at both ends of the laminated element, respectively. , placing a second electrode plate on the outside of the first electrode plate;
After providing the insulating plate, pressurizing and clamping the laminated element via a clamping member bridging between the second electrode plate and the insulating plate, and placing the pressurized laminated element in a resin case. A method for producing an electric double layer capacitor, comprising the steps of: storing the capacitor, and injecting a resin into a gap between the resin case and the pressurized laminated element to package the capacitor.