JPH0658866B2 - Electric double layer capacitor - Google Patents

Description

The present invention relates to an electric double layer capacitor using an electronic circuit.

<Prior Art> FIG. 8 shows a conventional electric double layer capacitor.
Is a bottomed box-shaped casing made of an insulating material, on which a terminal plate 2 made of a metal plate is placed, and its lead terminal 3
Project downward through the hole in the bottom. Reference numeral 4 denotes a capacitor unit loaded inside thereof, and one to several capacitors are stacked depending on the purpose.

Reference numeral 5 is a cover plate that closes the upper part of the casing 1, and a terminal plate 6 is placed on the lower surface of the cover plate, and its lead terminals 7 are projected upward from the holes provided in the cover plate 5.

Then, after applying an adhesive to each of the step portion at the upper end of the casing 1 and the step portion around the lid plate 5, the step portion on the outer periphery of the lid plate 5 is pushed into the step portion of the casing 1 to be bonded.

<Problems to be Solved by the Invention> As described above, in the electric double layer capacitor, the cover plate 5 is adhered to the casing 1. Therefore, the step part at the upper end of the casing 1 has the step part on the outer periphery of the cover plate 5. Since it takes a while to wait for the adhesive to harden in the pushed state, there is a problem that it takes time to manufacture.

An object of the present invention is to provide an electric double layer capacitor which has a simple structure, can be manufactured in an extremely short time, and is capable of taping, in order to solve the above problems of the electric double layer capacitor. Is.

<Means for Solving the Problems> In order to solve the above problems, according to the present invention, a + side terminal plate having a + side lead terminal is mounted on a bottom plate made of an insulating material, and a capacitor unit is further mounted on the terminal plate. And a frame that is open and closed and is made of an insulating material that surrounds the capacitor unit, and has a-side lead terminal that is parallel to the side of the + side lead terminal on the capacitor unit. Place the lid plate made of insulating material on
There is provided an electric double layer capacitor in which these are integrally combined by any means.

Also provided is one in which the above left and right lead terminals can be supplied by taping by making them parallel on the same plane.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 1 to 6 of the accompanying drawings.

Reference numeral 11 denotes a bottom plate made of synthetic resin, which is a quadrangle in the embodiment, but may be a quadrangle with rounded corners or a circle.

Reference numeral 12 denotes a vertically open frame placed on the bottom plate 11, 13 denotes a + side terminal plate made of a metal plate stacked on the bottom plate 11, which is a quadrangle having a size matching the inner circumference of the frame 12, but the bottom plate 11 has a circular shape. When frame 12
Is also cylindrical, and the terminal plate 13 is also circular.

Further, the + lead terminal 15 is provided at one end of one side of the terminal plate 13, but the base 16 of the lead terminal 15 is bent upward, and the tip thereof is directed forward.

Further, a notch 14 is provided in a part of the lower edge of the frame 12, the lead terminal 15 is projected from the notch 14 to the outside, and a base 16 thereof is provided in the frame 12.
The lead terminal 15 is projected forward from the middle part of the frame 12 along the outside of the frame. A metal conductive plate 17 is placed on the terminal plate 13.

As described above, the terminal plate 13 and the conductive plate 17 are overlaid on the bottom plate 11,
Place the capacitor unit 18 on top of it and frame 12
Surround with.

The capacitor unit 18 is a laminated body in which a required number of capacitor elements including polarizable electrodes and separators are stacked, and the upper end thereof is slightly above the upper end of the frame 12, but the protrusion amount is one of the uppermost portions of the laminated body. It is made thinner than the thickness of the sheet so that the uppermost sheet does not come off from the frame 12.

Further, the conductive plate 19 made of a metal plate and the minus side terminal plate 20 are placed on the capacitor unit 18, and the lid plate 21 is placed on the conductive plate 19.

Further, a notch 22 is provided on the upper edge of the frame 12 so that the minus side lead terminal 23 provided at the other end of one side of the terminal plate 19 is exposed from the notch 22. The base portion 24 of the lead terminal 23 is bent downward so as to be attached to the outside of the frame 12 so that the lead terminal 23 is parallel to the side of the lead terminal 15.

The press configured as described above is placed on the ultrasonic head 25 for welding as shown in FIG.
Using an air press etc., lower the lid plate 21 to the frame
Ultrasonic head while pressing until it presses on the upper edge of 12
25 is ultrasonically vibrated to heat the contact portions of the bottom plate 11, the frame 12 and the lid plate 21 to integrate them by welding.

In the embodiment shown in FIG. 6, triangular shallow recesses 28 and 29 and base portions 16 and 24 of the lead terminals 15 and 23 are inserted from the cutouts 14 and 22 at the lower and upper edges of the frame 12 to the surface of the frame 12. The vertical grooves 30, 31 are provided.

In this case, the bottom plate 11 and the lid plate 21 are provided with triangular protrusions 32 and 33 that fit into the recesses 28 and 29.

Further, the projecting edges 35 and 36 having a triangular cross section as shown in FIG. The matching slopes 37 and 38 are provided to increase the contact area between the bottom plate 11, the cover plate 21 and the frame 12 to increase the adhesive strength.

In the embodiment, the bottom plate 11, the frame 12 and the lid plate 21 are made of synthetic resin such as PBT containing 30% of glass fiber, but any resin having high temperature resistance can be used.

In the electric double layer capacitor A of the above-mentioned embodiment, the two lead terminals 15 and 23 are inserted into the insertion holes 42 and 43 of the printed board 41 as shown in FIG. 2 and soldered.

In the case where the left and right lead terminals 15 and 23 are parallel to each other on a horizontal plane, the lead terminals 15 and 23 are adhered to each other by the adhesive tape 46 on the tape 45 having the holes 44 arranged in a row as shown in FIG. Suitable for taping parts.

<Effect> As described above, according to the present invention, since the case is composed of the three types of parts, that is, the bottom plate made of an electrically insulating material, the upper and lower open frames, and the lid plate, the shape of each part is extremely simple and the manufacturing cost Will decrease.

In addition, a simple and simple manufacturing process in which a capacitor unit in which terminal plates are vertically stacked is put in a frame placed on a bottom plate, a lid plate is placed on the unit, and these are bonded by an appropriate means such as ultrasonic welding. Since it can be manufactured with, the man-hours can be reduced, the facility cost can be reduced, and the cost can be reduced.

The size of the finished product will be smaller and more airtight than conventional products. In addition, in the mounting process of this electric double layer capacitor, in addition to the conventional discrete supply, by arranging the left and right lead terminals in parallel on the same plane, it is possible to supply by taping.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing an example of the electric double layer capacitor of the present invention, FIG. 2 is a perspective view of the same printed circuit board mounted state, and FIG.
The figure is a perspective view in an exploded state, FIG. 5 is a vertical side view in a pressed state, FIG. 6 is a perspective view showing details of another example of the engaging portions of the bottom plate, the frame, and the lid plate, and FIG. 7 is the same as above. FIG. 8 is an enlarged sectional view showing a part of the engaged state, and FIG. 8 is a vertical sectional side view of a conventional electric double layer capacitor. 11 …… bottom plate, 12 …… frame 13,19 …… terminal plate, 15,23 …… lead terminal 18 …… capacitor unit, 21 …… cover plate 16,24 …… base part

Claims (2)

[Claims] 1. A + -side terminal plate having + -side lead terminals is placed on a bottom plate made of an insulating material, a capacitor unit is placed on the terminal plate, and an upper and lower open frame made of an insulating material surrounding the capacitor unit. , A negative side terminal plate having a negative side lead terminal parallel to the side of the positive side lead terminal, and a lid plate made of an insulating material on the negative side terminal plate, and these are integrated by any means. An electric double layer capacitor characterized by being coupled to. 2. The electric double layer capacitor according to claim 1, wherein the left and right lead terminals are parallel to each other on the same plane.