JPS5846615A - Laminated electrolytic condenser - 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 a multilayer electrolytic capacitor, and particularly provides a multilayer electrolytic capacitor having a simple structure.

Conventionally, in multilayer electrolytic capacitors, strips of anode foil and cathode foil are laminated alternately with separators in between, and these are housed in a case. Unlike wound type electrolytic capacitors, which are wound through wires, it is difficult to align the anode foil, cathode foil, and separator, which makes it difficult to obtain an electrolytic capacitor with the desired rating and also makes automation difficult in its production. It was something.

However, the present invention provides a multilayer electrolytic capacitor that has a simple structure and can be manufactured automatically, and embodiments thereof will be described below with reference to the drawings.

Figure 1(a) shows a piece of anode foil (1), and the figure (a) shows a piece of anode foil (1).
b) shows a piece of cathode foil. Here, since the anode foil (1) and the cathode foil (2) made of aluminum or the like have the same shape, their shape will be described based on the anode foil (1>). has a first notch (3)
is formed, and a second notch (4) is formed inward from the - side, and this second notch (4) allows the fixing piece (5)
This fixed piece (5) has a through hole (6) for fitting.
is formed. Fig. 1(C) shows a separator (7) made of kraft paper or Manila hemp paper.The separator (7) has notches (8) and (9) at its two corners.
) is formed and has a convex shape. The separator (7) is large enough so that when the anode foil (1) and the cathode foil (2) are laminated with the separator (7) interposed therebetween, the two electrodes (1) and (2) will not be electrically short-circuited. Sa, Tmari Ryoichi (1)
A shape having a size equivalent to (2) or slightly larger than them is preferable.

Next, Figures 2 and 3 show the stacked state. For stacking, two guide bins such as aluminum rivets are planted on the first fixing plate α0 of the insulator, and the anode foil is (1) and cathode foil (2) are alternately laminated with separators (7) in between in the directions shown in FIGS. 1(a), (b), and (c). During lamination, the through hole (6) of the anode foil (1) and the first guide pin insert fit together, and the through hole (6) of the cathode foil (2) fits together.
6) and the second guide pin circle, it is possible to easily align the two cities (1), (2) and the separator. Furthermore, both sides of the first fixed plate αO (1
), by providing a guide plate (to) at a position corresponding to the second notch (4) in (2), more reliable alignment can be achieved. This guide plate (2) may be removed after lamination, or may be left as is. By the way, the fixed pieces (6) of laminated Ryōichi (1) and (2)
) Since the separator (72) is not interposed in the part, there will be a difference in level compared to the part in which it is interposed.To prevent this, it is preferable to fit an aluminum washer α fathom into the guide bin (6) and (2) as appropriate.Required After the stacking of the guide pins αυ and @, the washer α4 is inserted and the lead (2) is inserted, the second fixing plate α0 is placed, and pressure is applied from above, so that both parts (1) and (2) and the separator (7), fix the gap between the Ryogoku standard plates σO and 00 with a band α of aluminum or resin, and caulk the head of the guide bin αD1@. A capacitor element αe can be obtained.In this capacitor element αB, in order to ensure electrical connection between the anode foils (1) and between the cathode foils (2), each fixing piece (5) It is preferable to weld the negative side α9 of the capacitor element αB.The capacitor element αB is immersed in the electrolytic solution in this shape.

FIGS. 4 and 5 show a state in which the capacitor element αa is housed in the case.

In Figure 4, case ■ has one side open;
The opening is sealed with a single upper lid t2D.

The lead αθ of the capacitor element αa is fixed to an external terminal provided on the upper lid QrJ. The case (2) and the upper lid QfJ are made of noryl resin or polypropylene resin, and although various sealing methods are available, ultrasonic welding is preferred. Note that if the capacitor element (2) is not fixed within the case (2), it is fixed with a resin such as attack polypropylene.

FIG. 5 shows a case in which a case cover with two sides open, a top cover 011, and a side cover (2) are used, and the external terminals are provided on the side cover (toward).

In the present invention described above, since the capacitor element has a structure in which both plates and a separator are laminated between both fixing plates, the structure is simple and lamination is easy, and automation can be achieved, and the capacitor element can be handled as a single unit. It is also very convenient. In addition, since a second notch is formed in both ends, it is possible to prevent stress from being applied partially to both ends during caulking of the guide pin, and because the heat conduction path by the fixed piece is long, it is also possible to prevent the effects of heat during welding. It is. moreover,
Since the shapes of both cities are the same, there is also the advantage that the cutting equipment, etc., can be the same.

Next, Table 1 shows the frequency characteristics of a multilayer electrolytic capacitor according to the present invention and a conventional wound electrolytic capacitor with a rating of 63.12,000 (#F).

Table 1 Frequency characteristic impedance (mΩ) IKHz 10KHz 100KHz Conventional example 16 mΩ 8.5 m0 14 mΩ Invention according to the present invention 13 mΩ 3.4 mΩ 8.1 mΩ As can be seen from Table 1, the present invention is an electrolytic impedance with excellent frequency characteristics. It can provide capacitors.

[Brief explanation of the drawing]

The figure shows a multilayer electrolytic capacitor according to the present invention.
Figures 1 (a), (c) are views showing the anode foil, cathode foil, and separator; Figure 2 is a perspective view showing the capacitor element;
Figure 3 is a cross-sectional view of the capacitor element, and Figures 4 and 5 are cross-sectional views of the capacitor element housed in the case.
It is a diagram. In the figure, (1)... Anode foil, (2)... Cathode foil, (7
＞...Separator, α01α0...Fixing plate, αυ,
Shout...Guide pin, αΦ...Washer, α5-...
Lead, αno...band, αe...capacitor element, ■...case, ff1e, (to)...lid, four...
・External terminal. (a) (C) (b)

Claims (1)

[Scope of Claims] A first fixing plate and a second fixing plate each having a guide pin are arranged such that the shaped cathode foil is alternately inserted through a separator in which a first notch portion and a second notch portion are formed. In between, the guide pin and the through hole are fitted, and the fixed pieces of the anode foil and the cathode foil are laminated so as to be connected to each other, and the capacitor element is formed by identifying the space between the two fixing plates. A multilayer electrolytic capacitor with (2) The multilayer electrolytic capacitor according to claim (1), wherein the guide pin is provided with a lead. (3) A multilayer electrolytic capacitor according to claim (1) or (2), which is formed by welding the fixed pieces together. (4) A multilayer electrolytic capacitor according to claim (1), (2) or (3), wherein a washer is inserted into the guide pin. ■ In claim (2), (3) or (4), the capacitor element is housed in a case, the lead is connected to the external terminal provided in 1, and the case is sealed with the lid. Multilayer electrolytic capacitor 0