JPS58155717A - 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 in particular to an electric double layer capacitor element and an electric double layer capacitor element. Relating to means for holding.

An electric double layer capacitor using a paste electrode as a single layer has a structure shown in Figure 1, as seen in Yonezono Patent No. 3,536,963. In the figure, 1 is electronic conductivity,
2 is a paste electrode made of activated carbon powder and an electrolyte solution; 3 is a porous separator that is permeable to ions and blocks electron conduction to prevent conduction between the electrodes; 4 is a non-conductive gasket provided to hold the paste electrode and isolate it from the outside world.

An electric double layer capacitor is formed by enclosing a stack of basic cells in which multiple basic cells with such a structure are stacked in a metal exterior case, and when a DC voltage is applied, the voltage increases in proportion to the insulation resistance of each basic cell. voltage is distributed.

In this case, when the basic cell, especially the plurality of conductive separators constituting the basic cell, come into contact with the inner wall side of the metal exterior case, the basic cell becomes sheet-like 1, and the short part of the basic cell is held. The voltage that was being applied is redistributed to the ab basic cells, and the voltage applied to each basic cell increases. If the voltage increased in this way becomes larger than the designed value and exceeds the withstand voltage of the basic cell, the basic cell will be destroyed and the hm of the electric double layer capacitor will be lost.

Therefore, in order to improve such conventional drawbacks, it is necessary to maintain insulation between the basic cell and the inner part of the outer case.

Therefore, the conventional insulation structure between the basic cell and the outer case is (a) a single basic cell or a laminate of basic cells laminated with several t-values of basic cells, and (b) an insulating film wrapped around the outer periphery of the basic cell. An insulating tube made of resin or the like is inserted between the cell and the outer case.

It was done by %O Seranari).

However, the above-mentioned conventional structure (0) has the disadvantage that the number of steps required to wrap the insulating film around the laminate is extremely large when the basic cell is wrapped in a single unit. If the dimensional difference between the insulating tubes is small, it will be difficult to insert the tube, and if the dimensional difference is large, there will be large variations in the placement position of the insulating tube inside the outer case.) When inserting into the outer case, it is not possible to determine the insertion position. Because there is a gap between the outer case and the resin pipe body, the finished product shape is also large.

There are drawbacks such as.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric double layer capacitor and a method for manufacturing the same which eliminates such conventional drawbacks.

According to the present invention, one electric double layer content cell is provided.
- In an electric double layer capacitor in which multiple layers are laminated and sealed in a conductive outer steel case, and in a method for embroidering the same, a sheet having nine resilience elasticity is cut into strips along the inner wall side of the outer steel case. An electric double layer capacitor and a method for manufacturing the same are obtained, which include a step of inserting and arranging the capacitor.

An embodiment of the present invention will be described in detail below.

〔Example〕

FIGS. 2(8) to 2(0) are cross-sectional views of the assembly process of an electric double layer capacitor according to an embodiment of the present invention.

An insulating sheet with increased elasticity made by coating both sides of high-quality paper with a thickness of Q, l mm with polyglobylene resin is -8, Q
Cut into strips with a length of 5 mm and a length of 5 Q rrHn, and spread this sheet into 6 tubes with a diameter of about 12 to 10 mm.

Next, as shown in Figure 2 (6), the inner sacrifice is 15 mm% and the back is ^13.
The sheet 7'i is inserted in a tubular shape into a bottomed cylindrical outer ring case 6 made of metal such as 1 mm of iron.

The sheet 7 inserted in this manner spreads out along the inner wall of the outer steel case 6 due to its own repulsive force, as shown in FIG. 2(c), to provide an insulating layer. After that, as shown in Figure 2, the outer ring 2 is inserted into the outer ring case 6.
A laminate 8 in which eight basic cells each having a thickness of 1.4 mm are stacked is placed in the cell m.

Next, the upper end of the laminate 8 placed inside the outer steel case 6 and)
The conductive seven electrode plates at the ends of each kite electrode plate 9,
The outer case 6 is removed, the electrode is taken out, and the laminate 8 is removed.
Apply pressure with a breather, etc. to a pressure of 15 to 20h4/C!
II'' and force the outer iron case 6 and @2 Kametoku plate 10.
Then, pressurize the laminate 8 with a constant pressure to form an electric double layer capacitor that maintains this state (w & 2 Figure 0)
.

The general electrical characteristics of the electric double layer capacitor formed according to the present invention described above are shown below. 11N compared to conventional
The general electrical characteristics of an electric double J-capacitor manufactured by attaching an insulating film t* to the outer circumferential surface of the C ridge layer are also listed in Section 16.

As is clear from this conventional comparative example, it can be seen that the desired electrical characteristics can be sufficiently maintained even when the present invention is used. On the other hand, the second source shows the number of man-hours required to put the sheet cut into strips according to the present invention into an exterior case, and the number of man-hours required for wrapping the sheet with an insulating film, which is the conventional example, in terms of time per 1,000 pieces. However, according to the present invention, it can be accomplished with an extremely small number of man-hours, approximately 115.

'1Ih2 However, in the embodiment of the present invention, the winding of the insulating sheet is illustrated in a one-way state, but the end faces of the sheet may be in W contact with almost no gaps, so that it is not necessary to make a one-way state.

As described above, the present invention has the effect that the insulation for the IIM inside the electric double layer capacitor L exterior case can be easily installed, and its industrial value is great.

[Brief explanation of drawings]

Is Figure 1 the electric double layer capacitor used in the present invention? A cross-sectional view of the element. FIGS. 2(5) to 2(0) are sectional views showing one step in assembling the electric double layer capacitor according to the present invention. 1... Conductive separator, 2... Paste electrode, 3... Porous separator, 4...
...Non-conductive gasket, 5...Basic cell,
6...Exterior case, 7...Sheet, 8
・・・・・・Laminated body, 9...10 electrode plate, lO・
...Second electrode plate. Figure 1 (△) (8) (C) /θ

Claims (2)

[Claims] (1) In an electric double layer capacitor in which one or more electric double layer capacitor cells are laminated and sealed in a conductive outer case, insulation is provided by a sheet that is in contact with the inner wall side of the outer case and has restoring elasticity. An electric double layer capacitor characterized by having a layer. (2) A step of cutting a sheet having restoring elasticity into strips on the inner Ii@ surface of the outer case, winding them, temporarily forming the sheet into the tubular body, and inserting the sheet, and inserting the electric double layer condenser cell into the tubular body. 1. A method for manufacturing an electric double layer capacitor, comprising the step of arranging the capacitor.