JPH0337227Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the shape of an electrode plate used in an electric double layer capacitor.

[Conventional technology]

Electric double layer capacitors are mainly used as memory backup capacitors,
Since a single cell serving as a capacitive element has a low rated voltage, a structure in which multiple cells are stacked is used to obtain a high voltage.

In an electric double layer capacitor having a laminated structure, a metal case is usually used as the outer case, and a plurality of stacked cells are held under pressure by caulking the metal case. The specific casing structure is shown in Figure 4. A plurality of cells 2 are stacked and placed inside a bottomed cylindrical metal case 1, and a first electrode plate 3, an insulating plate 4, and a second electrode plate 5 are also incorporated. End 1a is the car
It has been processed. Note that, for electrical insulation between the cell 2 and the metal case 1, the cell 2 is covered with an insulating sleeve 6, for example. Electrical connection with the outside is made between the electrode terminal 3a of the first electrode plate 3 connected to the topmost cell 2 and the bottommost cell 2.
The electrode terminal 5a of the second electrode plate 5 is connected to the bottom 1b of the metal case 1 and the open end 1a.

[Problem that the invention attempts to solve]

By the way, the first electrode plate 3 and the second electrode plate 3 mentioned above
Regarding the electrode plate 5, as shown in FIG. 5, an electrode plate having a shape as disclosed in, for example, Japanese Utility Model Application Publication No. 167329/1983 is known. These electrode plates 3 and 5 are
Two approximately U-shaped notches 3c, 5c are formed on the outer peripheral portions 3b, 5b, and both notches 3c, 5 are formed.
A protruding piece 3 that becomes an electrode terminal protrudes outward from between c.
a, 5a are integrally formed, and these projecting pieces 3a, 5a
It is what caused this.

The electrode plates 3 and 5 having such a shape are usually manufactured all at once by press working, but as shown in FIG. 6, for example, the material extraction from the plate material 6 is poor, and an improvement in yield cannot be expected. It was hot.

[Means for solving problems]

However, the present invention was devised to solve the above-mentioned problems, and specifically, a defect portion having a width wider than the width of the protruding piece is formed on the opposite side of the electrode plate from the protruding piece. The present invention provides an electrode plate that can improve the yield through material extraction.

〔Example〕

EMBODIMENT OF THE INVENTION Below, the electric double layer capacitor based on this invention is demonstrated based on FIG. 1 thru|or 3.

In addition, prior to description, in the drawings, the same reference numerals are given to the same parts as in the conventional example.

First, FIG. 1 shows a first electrode plate 3 according to the present invention.
0, an insulating plate 40 and a second electrode plate 50 are shown.
In the electrode plates 30, 50, the outer peripheral portion 30b,
50b has two approximately U-shaped notches 30c, 5.
0c is formed, and protrusions 30a and 50a protruding outward from between both notches 30c and 50c are integrally formed. Same protrusion piece 30
First defective portions 30d and 50d are formed having a width W2 wider than the width W1 of portions a and 50a.
In addition, the protrusions 30a and 50a are bent at 90°.
caused.

In the insulating plate 40, a first positioning protrusion 41 and a second positioning protrusion 42 are integrally formed at opposing positions on the center line. through hole 43
is formed.

The first electrode plate 30, the insulating plate 40, and the second electrode plate 50 are superposed as shown in FIG.
The projecting piece 30a of the electrode plate 30 is inserted into the through hole 4 of the insulating plate 40.
The first defect 50 of the second electrode plate 50 through 3
d, and the first electrode plate 50 of the second electrode plate 50.
It is formed between the notch 50c formed by fitting the defect 50d with the first positioning protrusion 41 of the insulating plate 40 and raising the protrusion 50a of the second electrode plate 50. The second defective part 50e
This is done by fitting the second positioning projection 42 of the insulating plate 40 to the second positioning projection 42 of the insulating plate 40.

The casing structure is shown in FIG. 2, but since it is similar to the conventional example, its explanation will be omitted.

[Effect of idea]

As described above, in the electrode plates 30 and 50 according to the present invention, since the flaws 30d and 50d are formed on the opposite side of the protrusions 30a and 50a that become electrode terminals, for example, as shown in FIG. When punching out the electrode plates 30, 50, the protrusions 30a, 50
Since the inside a can be located within the defective parts 30d and 50d, it is possible to expect an improvement in the yield due to material extraction from the plate material 60.

[Brief explanation of the drawing]

Figures 1 to 3 are related to the present invention;
The figure is a developed view showing a first electrode plate, an insulating plate, and a second electrode plate, FIG. 2 is a cross-sectional view of an electric double layer capacitor, and FIG.
4 to 6 relate to conventional examples, in which FIG. 4 is a cross-sectional view of an electric double layer capacitor, FIG. 5 is a developed view showing the first electrode plate, insulating plate, and second electrode plate, and FIG. FIG. 6 is a plan view showing the material selection for the electrode plate. In the figure, 1...Case, 2...Cell, 30, 50
...Electrode plate, 40...Insulating plate, 30a...Protrusion piece,
30d...Defect part.

Claims (1)

[Scope of utility model registration request] In an electric double layer capacitor, in which at least one cell, which is a capacitance element, is housed in a bottomed cylindrical metal case, and a first electrode plate, an insulating plate, and a second electrode plate are incorporated in order, A first electrode plate and a second electrode plate are insulated, each having a protruding piece that integrally protrudes and is pulled up, and a defect portion having a width wider than the width of the protruding piece on the opposite side of the protruding piece. The plates were stacked with the plates interposed, and the protruding piece of the first electrode plate was passed through the through hole formed in the insulating plate and the defective part of the second electrode plate, so that the protruding pieces of both electrode plates were made to protrude in the same direction. An electric double layer capacitor characterized by: