JP2002110456A - Method for packaging electrolytic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for packaging an electrolytic capacitor capable of repeating unsealing/resealing comparatively simply even by a user having no sealing means such as a heat sealing device when the electrolytic capacitor, in which a capacitor element with an anode member with a dielectric film thereon, is impregnated with a liquid or solid cathode member, is housed in an aluminum laminated bag and forwarded and/or stored. SOLUTION: The electrolytic capacitor is housed in the aluminum laminated bag with a sealing mechanism capable of repeating airtight sealing and unsealing is installed. A fastener mechanism (the so-called reusable-chuck mechanism) by mutually fitting projecting strips and recessed strips having flexibility can be adopted as the concrete constitution of the sealing mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for packaging an electrolytic capacitor in which a capacitor element having an anode member on which a dielectric film is formed is impregnated with a liquid or solid cathode member.

[0002]

2. Description of the Related Art As an electrolytic capacitor in which a liquid or solid cathode member is impregnated into a capacitor element having an anode member on which a dielectric film is formed, one having a structure as shown in FIGS. 6 to 8 is known. .

The electrolytic capacitor shown in FIG. 6 has a capacitor element 11 in which an aluminum anode foil having a dielectric film formed thereon and an opposing cathode foil are wound via a separator, and an electrolytic solution or a TCNQ complex salt as a cathode member, and a conductive material. The capacitor element is impregnated with a solid electrolyte such as a polymer. The capacitor element is housed in an aluminum outer case 12 having a bottomed cylindrical shape, sealed with a sealing rubber 13, and a seat plate 14 for surface mounting is mounted. Reference numerals 10a and 10b indicate anode and cathode lead terminals.

In the electrolytic capacitor shown in FIG. 7, a capacitor element 11 formed by winding an aluminum anode foil having a dielectric film formed thereon and an opposite cathode foil via a separator is provided with a TCNQ complex salt as a cathode member, a conductive polymer or the like. After impregnating with a solid electrolyte, the capacitor element is housed in a bottomed aluminum first outer case 15, filled with sealing resin 16 and sealed, and then housed in a second resin outer case 17 for surface mounting. It was done. Reference numerals 10a and 10b indicate anode and cathode lead terminals.

In the electrolytic capacitor shown in FIG. 8, a dielectric layer 22 made of an electrolytic oxide film of the anode member, a solid electrolyte layer 23 made of a conductive polymer, etc., A cathode lead layer 24 made of carbon, silver, or the like is sequentially formed to constitute the capacitor element 2, and the anode lead pins 21 implanted on the end surface of the anode member 21 are formed.
The cathode lead terminal 20a is welded to the cathode lead layer 4 and the cathode lead terminal 20b is soldered to the cathode lead layer 4, and the outer periphery of the capacitor element 2 is covered and sealed with an outer shell layer 25 made of epoxy resin or the like. .

An electrolytic capacitor as shown in FIGS. 6 to 8 is temporarily fixed to a concave portion provided in a carrier tape,
The carrier tape is wound up on a reel, the reel is housed in an aluminum laminated bag, and an opening of the aluminum laminated bag is heat-sealed to be shipped and / or packaged.
Or stored.

A user of the capacitor cuts one end of the aluminum laminate bag with scissors, a cutter or the like, opens the reel, removes the reel, removes the capacitor from the carrier tape, and solders it to a printed wiring board or the like.

[0008] When the unused capacitor is stored after being opened, the opening of the aluminum laminate bag is completely sealed with a heat seal or the like in order to maintain the electrical characteristics of the capacitor and the solder wettability of the lead terminals. Although it is desirable to use a capacitor, the user of the capacitor often does not have a large sealing means such as a heat sealing device, so that the capacitor is stored in an open state, or the opening is folded and stopped with a cellophane tape or the like. The fact is that it is sealed in a proper way.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a method for packaging an electrolytic capacitor comprising a capacitor element having an anode member on which a dielectric film is formed and a liquid or solid cathode member impregnated therein. An object of the present invention is to provide a method for packaging an electrolytic capacitor so that a user who does not have a means can repeat opening / resealing relatively easily.

[0010]

A method for packaging a solid electrolytic capacitor according to the present invention is a method for packaging an electrolytic capacitor in which a capacitor element having an anode member on which a dielectric film is formed is impregnated with a liquid or solid cathode member. The present invention is characterized in that the electrolytic capacitor is housed in an aluminum laminate bag provided with a sealing mechanism capable of repeating hermetic sealing and unsealing.

As a specific configuration of the closing mechanism, a fastener mechanism (so-called reusable chuck mechanism) in which flexible convex and concave ridges are fitted to each other can be employed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a method of packaging an electrolytic capacitor according to one embodiment of the present invention, various electrolytic capacitors as shown in FIGS. 6 to 8 are temporarily fixed to recesses provided on a carrier tape. Then, the carrier tape is wound around a reel, and the reel 1 is stored in an aluminum laminate bag 2 as shown in FIG.

The aluminum laminated bag 2 shown in FIG. 1 is provided with a heat seal 3a at one opening end of a tubular bag material, and a sealing mechanism 4 having a sectional structure as shown in FIG. 2 at the other opening end. It is a thing. Note that a moisture absorbent 5 such as silica gel is enclosed in the aluminum laminate bag.

The closing mechanism shown in FIG. 2 comprises a fastener mechanism (a so-called reusable chuck mechanism) in which flexible plastic ridges 41 and concave ridges 42 are fitted to each other. Hermetic sealing and opening can be repeated.

When an aluminum laminate bag having such a sealing mechanism is used and a manufacturer ships a capacitor, the airtightness of the packaging until the user opens the capacitor is further improved as shown in FIG. Alternatively, a heat seal 3b may be provided outside the portion where the sealing mechanism 4 is provided. In this case, the user of the capacitor uses the sealing mechanism 4 to repeat the resealing / resealing by cutting the middle position between the heat sealing portion 3b and the sealing mechanism 4 with scissors, a cutter, or the like, and opening the same.

Here, in the electrolytic capacitor having the structure as shown in FIG. 5, a polymer of 3,4-ethylenedioxythiophene was used as a cathode member, and a rated voltage of 4 V-100 μm was used.
F, an outer diameter φ6.3 mm × L6.0 mm was packaged according to the embodiment as shown in FIG. 1 [Example 1], and as shown in FIG. 4, one end of the aluminum laminate bag 2 was heat-sealed. 3a, the other end was bent and fixed with cellophane tape 6 [Comparative Example 1], and as shown in FIG. 5, both ends of the aluminum laminate bag 2 were heat-sealed 3a, 3b [Comparative Example 2]. 60 ° C) high humidity (90-95%)
After leaving for a long time (500 hours), the electrolytic capacitor was taken out and taken out, and a solder wettability test of the lead terminal was performed under the conditions shown in Table 1. Table 2 shows the results.

The electrical characteristics of each electrolytic capacitor before and after the high temperature and high humidity storage were measured. Table 3 shows the results.
Shown in

[0018]

[Table 1]

[0019]

[Table 2]

[0020]

[Table 3]

In Table 3, ΔC / C is the value of capacitance at 120 Hz (value after standing−value before standing) / value before standing,
tanδ is the tangent of the loss angle at 120 Hz, and ESR is 10
Equivalent series resistance at 0 kHz, LC is rated voltage applied 120
The leakage current after one second is shown, and each characteristic value is 1 for each sample.
It is the average of 0 pieces.

As can be seen from Table 2, in Example 1, the solderability of the lead terminals is better than that of Comparative Example 1 of the bent seal, and is close to Comparative Example 2 of the heat seal.

As can be seen from Table 3, Example 1
In Comparative Example 1, the change in C and ESR due to the high-temperature and high-humidity storage was suppressed as compared with Comparative Example 1 of the folded seal, which is close to Comparative Example 2 of the heat seal.

[0024]

According to the present invention, an electrolytic capacitor in which a liquid or solid cathode member is impregnated in a capacitor element having an anode member on which a dielectric film is formed is housed in an aluminum laminate bag and shipped and / or shipped. When storing the capacitor, the user of the capacitor opens the sealed aluminum laminate bag and then stores the remaining capacitor, even if the user does not have a sealing means such as a heat sealing device. Resealing can be repeated, and the electrical characteristics of the capacitor and the solder wettability of the lead terminals are maintained.

[Brief description of the drawings]

FIG. 1 is a perspective plan view showing a packaging mode (No. 1) of an electrolytic capacitor according to an embodiment of the present invention.

FIG. 2 is a sectional view of a sealing mechanism used in the embodiment of the present invention.

FIG. 3 is a perspective plan view showing a packaging form (No. 2) of the electrolytic capacitor according to the embodiment of the present invention.

FIG. 4 is a perspective plan view showing a packaging form of the electrolytic capacitor according to Comparative Example 1.

FIG. 5 is a perspective plan view showing a packaging form of an electrolytic capacitor according to Comparative Example 2.

FIG. 6 is a sectional view of an electrolytic capacitor (No. 1).

FIG. 7 is a sectional view of an electrolytic capacitor (No. 2).

FIG. 8 is a sectional view of an electrolytic capacitor (No. 3).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reel 2 Aluminum laminated bag 3a Heat seal 3b Heat seal 4 Sealing mechanism 5 Hygroscopic agent 6 Cellophane tape

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyoshi Furukawa 217 Fukumo, Omachi-cho, Kishima-gun, Saga Prefecture Inside Saga Sanyo Kogyo Co., Ltd. F term in Saga Sanyo Industry Co., Ltd. (reference) 5E082 AB09 BC40 HH55

Claims (2)

[Claims] 1. A method for packaging an electrolytic capacitor in which a liquid or solid cathode member is impregnated in a capacitor element having an anode member on which a dielectric film is formed, wherein the electrolytic capacitor is repeatedly hermetically sealed and opened. A method for packaging an electrolytic capacitor, wherein the electrolytic capacitor is housed in an aluminum laminate bag provided with a sealing mechanism capable of performing the following operations. 2. The method for packaging an electrolytic capacitor according to claim 1, wherein said sealing mechanism comprises a fastener mechanism formed by fitting convex and concave ridges having flexibility with each other.