JPS59123218A - Cchip type aluminum 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 Field of Industrial Application The present invention relates to aluminum electrolytic capacitors, more specifically,
This relates to chip-type aluminum electrolytic capacitors.

Configuration of conventional example and its problems Conventional chip-type aluminum electrolytic capacitors of this type are
As shown in Figure (A), a capacitor element (1+) is housed in a bottomed cylindrical metal case (3) having a lead wire (2),
The sealing material (4) is sealed with η, and this is used as an internal unit of a chip type capacitor, and the lead wire (2) and the sealing material (
4) and other lead wires (5) that pass through are welded to the metal terminals (6) prepared in advance, and then the internal unit and welded parts are resin molded with exterior resin (7) to complete the process. Ta. Further, as shown in Fig. 1 (B), the capacitor element (1) is housed in a bottomed cylindrical metal case (8) without lead wires, and sealed with a sealing material (4). The internal unit of a chip-type aluminum electrolytic capacitor. Both lead wires pass through the sealing material (4), one is welded to the metal terminal (6) near the outside of the sealing part, and the other one protrudes from the sealing part and is connected to the top and side surfaces of the sealing part. and a metal terminal (6) that is bent along the back side and stretched to the other end.
The internal unit and welded parts were then molded with exterior resin (7) to complete the process. In this case, since resin molding is performed, the molding time requires 30 seconds to 5 minutes, and approximately 10 hours of after-cure is required after molding, so there is a problem that the process cannot be continuous, resulting in increased costs. It was also the cause. In addition, it is necessary to weld metal terminals before molding and to form metal terminals after molding, which complicates the process and increases process defects.
It also had the disadvantage of reducing workability.

Purpose of the Invention The present invention eliminates such conventional drawbacks, and comprises a pre-molded resin case and an electrode-treated resin case,
Without using metal terminals (combs), in other words, eliminating the molding process of metal terminals and without resin molding, it increases the work speed, and at the same time, it does not require post-processing such as after-cure, making the process continuous and automated. The purpose is to reduce costs.

Structure of the Invention The chip-type aluminum electrolytic capacitor (hereinafter referred to as an electrolytic capacitor) of the present invention has a capacitor element housed together with an electrolyte in an aluminum case, sealed with a sealing material,
A capacitor unit with a protruding anode lead wire and a bottomed case made of resin (hereinafter referred to as the resin case).
and a resin case sealing plate (hereinafter referred to as the lid body), and holes for negative and anode lead wires (hereinafter referred to as the Riet wire holes) are bored in the bottom plate of the resin case, and the outer surface is coated with metal. Negative and anode terminals are provided by printing, thermal spraying, etc., and the negative and anode lead wires of the capacitor unit are inserted and protruded outward from the inside of the lead wire hole in the resin case bottom plate, and the protruded cathode and anode IJ -t' wires are welded to negative and positive electrode terminals on the outer surface of the bottom plate of the resin case, and the opening of the resin case is sealed with the lid.

DESCRIPTION OF EMBODIMENTS FIGS. 2 and 3 show cross-sectional views of the electrolytic capacitor of the present invention. The same symbols as in FIG. 1 indicate the same parts and portions.

In the figure, (8) is a bottomed cylindrical metal case (generally aluminum case), (9) is a resin case, (9-1), (
9-2) is the lead wire hole, tlD) is behind the resin case,
The positive electrode terminal portion, 01) indicates the lid body.

The structure of the electrolytic capacitor of the present invention will be explained.

A capacitor element (]) formed by winding electrode foil and electrolytic paper is housed together with an electrolyte in a bottomed cylindrical metal case (8) and sealed with a sealing material (4) to form a capacitor unit. After that, the sealing part (4) of the capacitor is attached to the resin case (
8), and lead wire holes (9-1) and (9-2) provided in the bottom part (9B) of the resin case (8).
), and make contact with the electrode terminal part (10) on the outer surface of the bottom part (9B) of the resin case (9). After welding, cut and remove the excess lead wire,
The opening of the resin case (9) is sealed with the lid (II) to provide the electrolytic capacitor of the present invention. ~.

Fig. 2 shows a case where the resin case (9) is square, and Fig. 3 shows a case of a cylindrical body. 02) in Fig. 2 is a tapered part for polarity determination. Although it is omitted in FIG. 3, it can be provided as appropriate.

Effects of the Invention As described above, the electrolytic capacitor of the present invention eliminates the need for resin molding and molding of metal terminals (combs), which simplifies the process and greatly improves production. This has the effect of increasing efficiency and facilitating automation, which can be used industrially.

[Brief explanation of drawings]

The first factors (A) and (E) are cross-sectional views of conventional chip-type aluminum electrolytic containers [Fig. 1: Capacitor element 2.5: Lead wire 3.8: Bottomed cylindrical metal case 4: Sealing material 9: Resin case 9B゛Bottom surface 9-1.9-2゛Lead wire hole 10, tree moon Electrode terminal part of case 11: Resin case sealing plate 12: Polarity discrimination taper part Patent applicant Matsushita Electric Industrial Co., Ltd. Agent Patent attorney
Isao Abe (△) Figure 1 Figure 2 // Figure 3

Claims (1)

[Claims] A capacitor unit is constructed by storing a capacitor element together with an electrolyte in an aluminum case, sealing it with a sealing material, and having negative and anode lead wires protrude from the sealing material in one direction, and a bottomed case made of resin (resin case). ) and a resin case sealing plate (hereinafter referred to as the lid), and holes for negative and anode lead wires (hereinafter simply referred to as lead wire holes) are bored in the resin case bottom plate, and holes are provided on the outer surface of the resin case. Negative and anode terminals are provided by metal vapor deposition, metal printing, thermal spraying, etc.
Inserting and protruding the negative and anode lead wires of the capacitor unit outward from the inside of the lead wire hole in the resin case bottom plate,
A chip type aluminum electrolytic capacitor characterized in that the protruding negative and anode lead wires are welded to the negative and positive electrode terminals on the outer surface of the resin case bottom plate, and the resin case opening is sealed with the lid body. .