JP2570131B2 - Bipolar solid electrolytic capacitor with built-in fuse - Google Patents
Bipolar solid electrolytic capacitor with built-in fuseInfo
- Publication number
- JP2570131B2 JP2570131B2 JP5251264A JP25126493A JP2570131B2 JP 2570131 B2 JP2570131 B2 JP 2570131B2 JP 5251264 A JP5251264 A JP 5251264A JP 25126493 A JP25126493 A JP 25126493A JP 2570131 B2 JP2570131 B2 JP 2570131B2
- Authority
- JP
- Japan
- Prior art keywords
- fuse
- built
- solid electrolytic
- electrolytic capacitor
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 title claims description 37
- 239000007787 solid Substances 0.000 title claims description 18
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 229910000679 solder Inorganic materials 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 2
- 229910052745 lead Inorganic materials 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 229910000743 fusible alloy Inorganic materials 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 1
- 239000004020 conductor Substances 0.000 claims 1
- 239000011810 insulating material Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Landscapes
- Fuses (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、民生用および産業用電
子機器に使用される小型のヒューズ内蔵型双極性固体電
解コンデンサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-sized bipolar solid electrolytic capacitor with a built-in fuse used in consumer and industrial electronic equipment.
【０００２】[0002]
【従来の技術】従来のヒューズ内蔵型固体電解コンデン
サを図４（ａ）に示す。１はコンデンサ素子で、陽極リ
ードを植立し加圧成形した周面に陰極層２を設けて作ら
れている。このコンデンサ素子１の陽極リードに溶接等
の手法により陽極リード端子８が固着されている。又、
陰極層２に、図４（ｂ）に示すように両端部分を残して
絶縁フィルム７で被覆された低融点合金（ヒューズ）６
を介して導電性接着剤や半田付け等の手段で陰極リード
端子９を接続する。陽・陰極リード端子８，９の一部を
除き、これら全体を外装樹脂４で樹脂モールドしてヒュ
ーズ内蔵型固体電解コンデンサが作られている（例え
ば、特開昭６２−１５０８１７号公報参照）。2. Description of the Related Art A conventional solid electrolytic capacitor with a built-in fuse is shown in FIG. Reference numeral 1 denotes a capacitor element, which is formed by providing a cathode layer 2 on a peripheral surface formed by pressurizing and forming an anode lead. An anode lead terminal 8 is fixed to the anode lead of the capacitor element 1 by a method such as welding. or,
As shown in FIG. 4B, a low melting point alloy (fuse) 6 covered with an insulating film 7 except for both end portions is formed on the cathode layer 2.
The cathode lead terminal 9 is connected by means of a conductive adhesive, soldering, or the like via the. A solid electrolytic capacitor with a built-in fuse is manufactured by resin-molding the whole of the positive and negative lead terminals 8, 9 except for a part thereof, with an exterior resin 4 (see, for example, Japanese Patent Application Laid-Open No. Sho 62-150817).
【０００３】従来の双極性固体電解コンデンサは、図５
に示すように、陽極リードを植立し加圧成形した周面に
陰極層２を設けて作られたコンデンサ素子１を導電性接
着剤や半田５で金属ケース１０内に固定しハーメチック
シールしたものを２個用い、金属ケース１０の底部同士
を導電性接着剤や半田５で接続して作られている。そし
て、各々のコンデンサ素子１の陽極リードから溶接など
の手法により外部リード端子３がそれぞれ異なる方向に
導出されている。なお、金属ケース１０の外周は、金属
スリーブか絶縁体スリーブで被覆されている。A conventional bipolar solid electrolytic capacitor is shown in FIG.
As shown in FIG. 1, a capacitor element 1 formed by providing a cathode layer 2 on a peripheral surface obtained by implanting an anode lead and pressing and molding is fixed in a metal case 10 with a conductive adhesive or solder 5 and hermetically sealed. And the bottom of the metal case 10 is connected to each other with a conductive adhesive or solder 5. The external lead terminals 3 are led out of the respective anode leads of the respective capacitor elements 1 in different directions by a method such as welding. The outer periphery of the metal case 10 is covered with a metal sleeve or an insulator sleeve.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来のヒュー
ズ内蔵型固体電解コンデンサでは、コンデンサ素子１の
外側に被覆されたヒューズを配置するため、コンデンサ
として大型になる欠点を有していた。又、前記の配置に
加え、ヒューズ６の両端部は半田又導電性接着剤５で接
続しており、外装するまでの間はヒューズ６でコンデン
サ素子１と陰極リード端子９を保持することから、工程
中で何らかの機械的ストレスを受けるとヒューズ切れや
接続剥れ等の不具合が生じるという欠点があった。更に
有極性であるため、逆実装が発生しやすいという欠点が
あった。本発明の目的は、上記欠点を解消しヒューズ接
続の信頼性を向上させた小型のヒューズ内蔵型固体電解
コンデンサを提供することにある。The above-mentioned conventional solid electrolytic capacitor with a built-in fuse has a disadvantage that the size of the capacitor becomes large because the coated fuse is arranged outside the capacitor element 1. In addition to the above arrangement, both ends of the fuse 6 are connected by solder or conductive adhesive 5, and the fuse 6 holds the capacitor element 1 and the cathode lead terminal 9 until the fuse 6 is packaged. There is a drawback that if mechanical stress is applied during the process, a defect such as a blown fuse or a peeled connection occurs. Furthermore, since it is polar, there is a disadvantage that reverse mounting is likely to occur. SUMMARY OF THE INVENTION An object of the present invention is to provide a small solid-state electrolytic capacitor with a built-in fuse, which solves the above-mentioned disadvantages and improves the reliability of fuse connection.
【０００５】[0005]
【課題を解決するための手段】本発明のヒューズ内蔵型
固体電解コンデンサは、陽極リードを植立して加圧成形
し周面に陰極層を設けた固体電解コンデンサ素子２個
を、互いの前記陽極リードより第１，第２の外部リード
端子を各々異なる方向に導出し、又、互いの陰極層に
は、事前に低融点合金材の両端部を各々異なる面に露出
するように絶縁被覆したヒューズを用いて、各々導電性
接着剤や半田等で接続し樹脂外装したことを特徴とす
る。A solid electrolytic capacitor with a built-in fuse according to the present invention comprises two solid electrolytic capacitor elements each having an anode lead implanted and formed by pressure, and a cathode layer provided on a peripheral surface thereof. The first and second external lead terminals are respectively led out from the anode lead in different directions, and the respective cathode layers are insulated in advance so that both ends of the low melting point alloy material are exposed to different surfaces. The fuses are connected by a conductive adhesive, solder, or the like, and are packaged with a resin.
【０００６】[0006]
【実施例】次に本発明について図面を参照して説明す
る。図１（ａ）〜（ｃ）は本発明の第１の実施例を示す
断面図および接続しているヒューズの表面図，裏面図で
ある。図３は代表的な一低融点合金材のヒューズ溶断特
性を示す図である。図１において、コンデンサ素子１
は、弁作用を有する金属線の周辺に同様の金属粉末を角
柱状に加圧成形し、真空焼結したものに更に酸化層，半
導体層，グラファイト層を介して外周に陰極層２を取付
けて構成されている。次に低融点合金材６を図３に示す
ような特性を考慮して所定の長さに切断し、その両端部
を図１（ｂ），（ｃ）に示すように、各々異なる面に露
出するように絶縁フィルム７でサンドイッチ状にはさん
で熱圧着し被覆固定させる。次にコンデンサ素子１を２
個用い、それぞれの陰極層２に底面に半田や導電性接着
剤５を用いてヒューズの両端部を各々接続する。又、コ
ンデンサ素子１の陽極リードには溶接等の手法を用いて
各々異なる方向に外部リード端子３を接続する。これら
の端子接続後、各外部リード端子３の一部を除いて、外
装樹脂４によってモールド成形し外形寸法に合うように
端子折曲げ成形を施して図１（ａ）に示すように製品外
部に各々の端子が形成されたヒューズ内蔵型固体電解コ
ンデンサが完成する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. 1 (a) to 1 (c) are a sectional view showing a first embodiment of the present invention and a front view and a rear view of a connected fuse. FIG. 3 is a diagram showing the fuse blowing characteristics of a typical low melting point alloy material. In FIG. 1, a capacitor element 1
Is a method in which the same metal powder is pressure-formed into a prismatic shape around a metal wire having a valve action and then vacuum-sintered, and a cathode layer 2 is further attached to the outer periphery via an oxide layer, a semiconductor layer, and a graphite layer. It is configured. Next, the low melting point alloy material 6 is cut into a predetermined length in consideration of the characteristics as shown in FIG. 3, and both end portions are exposed to different surfaces as shown in FIGS. 1 (b) and (c). In such a manner, the sheet is sandwiched and sandwiched with an insulating film 7 to be thermocompression-bonded and fixed. Next, the capacitor element 1
Both ends of the fuse are connected to the respective cathode layers 2 using solder or conductive adhesive 5 on the bottom surface. The external lead terminals 3 are connected to the anode lead of the capacitor element 1 in different directions by using a technique such as welding. After these terminals are connected, a part of each of the external lead terminals 3 is removed, and molded with the exterior resin 4 and subjected to terminal bending so as to conform to the external dimensions. A fuse built-in type solid electrolytic capacitor in which each terminal is formed is completed.
【０００７】図２（ａ）〜（ｃ）は本発明の第２の実施
例を示す断面図、および接続しているヒューズの表面図
と裏面図である。この第２の実施例では、２個のコンデ
ンサ素子１の側面を対向させ、それらの間をヒューズ６
で接続している。外部リード端子３の一部を除いて外装
樹脂４でモールド成形し、ヒューズ内蔵型固体電解コン
デンサが出来上っている。なお、上記実施例に用いるヒ
ューズ材料としてはＳｎ，Ｐｂなどの低融点合金を用い
る。また、絶縁性フィルムとしてはポリエステル，ポリ
イミドなどが適当である。FIGS. 2A to 2C are a sectional view showing a second embodiment of the present invention, and a front view and a rear view of a connected fuse. In the second embodiment, the side surfaces of two capacitor elements 1 are opposed to each other, and a fuse 6 is provided between them.
Connected with. A solid electrolytic capacitor with a built-in fuse is completed by molding with an exterior resin 4 except for a part of the external lead terminal 3. Note that a low melting point alloy such as Sn or Pb is used as a fuse material used in the above embodiment. As the insulating film, polyester, polyimide or the like is suitable.
【０００８】[0008]
【発明の効果】以上説明したように本発明によれば、コ
ンデンサ素子２個の陰極層間に、ヒューズの両端部が互
いに異なる面に露出するように絶縁被覆されたヒューズ
を半田や導電性接着剤で接続することにより、双極性で
ヒューズ部を素子寸法内に収納でき、小型の固体電解コ
ンデンサを得ることができる。更に、本発明では、コン
デンサ素子の陰極層に接する絶縁フィルム面を絶縁性接
着剤等で固定すれば、ヒューズ接続部分に加わる外部ス
トレスの影響を軽減でき、ヒューズ接続の信頼性を向上
できる効果がある。又、素子の接続面の長さを利用し
て、ヒューズ長さを調整することが可能となることか
ら、客先ニーズに即したヒューズ溶断特性を得ることが
容易になる効果がある。As described above, according to the present invention, a fuse or a conductive adhesive is applied between two cathode layers of a capacitor element so that both ends of the fuse are exposed on different surfaces. , The fuse portion can be housed within the element size in a bipolar manner, and a small solid electrolytic capacitor can be obtained. Furthermore, in the present invention, if the insulating film surface in contact with the cathode layer of the capacitor element is fixed with an insulating adhesive or the like, the effect of external stress applied to the fuse connection portion can be reduced, and the effect of improving the reliability of the fuse connection can be improved. is there. Further, since the length of the fuse can be adjusted by using the length of the connection surface of the element, there is an effect that it is easy to obtain a fuse blowing characteristic that meets customer needs.
【図１】（ａ），（ｂ），（ｃ）は本発明の第１の実施
例によるヒューズ内蔵型双極性固体電解コンデンサの断
面図並びに被覆ヒューズの表面図，裏面図である。1 (a), 1 (b) and 1 (c) are a sectional view of a bipolar solid electrolytic capacitor with a built-in fuse according to a first embodiment of the present invention, and a front view and a rear view of a coated fuse.
【図２】（ａ），（ｂ），（ｃ）は本発明の第２の実施
例によるヒューズ内蔵型双極性固体電解コンデンサの断
面図並びに被覆ヒューズの表面図，裏面図である。FIGS. 2 (a), (b) and (c) are a sectional view of a fuse built-in bipolar solid electrolytic capacitor according to a second embodiment of the present invention, and a front view and a back view of a coated fuse.
【図３】代表的な一低融点合金材の線長とヒューズ溶断
特性を示す関係図である。FIG. 3 is a relationship diagram showing a wire length of one typical low melting point alloy material and a fuse fusing characteristic.
【図４】（ａ），（ｂ）は従来のヒューズ内蔵型固体電
解コンデンサの一例の断面図と被覆ヒューズの斜視図で
ある。FIGS. 4A and 4B are a cross-sectional view of an example of a conventional solid electrolytic capacitor with a built-in fuse and a perspective view of a coated fuse.
【図５】従来の双極性固体電解コンデンサの一例の断面
図である。FIG. 5 is a sectional view of an example of a conventional bipolar solid electrolytic capacitor.
１ コンデンサ素子 ２ 陰極層 ３ 外部リード端子 ４ 外装樹脂 ５ 半田又は導電性接着剤 ６ 低融点合金材（ヒューズ） ７ 絶縁フィルム ８ 陽極リード端子 ９ 陰極リード端子 １０ 金属ケース DESCRIPTION OF SYMBOLS 1 Capacitor element 2 Cathode layer 3 External lead terminal 4 Exterior resin 5 Solder or conductive adhesive 6 Low melting point alloy material (fuse) 7 Insulating film 8 Anode lead terminal 9 Cathode lead terminal 10 Metal case
Claims (3)
を加圧成形した陽極体の周面に陽極酸化層，半導体層を
介して陰極導体層を設けたコンデンサ素子２個を、それ
ぞれ前記陰極導体層を互い違いに、両端金属部が各々異
なる面に露出するように絶縁材料によって被覆した低融
点合金を介して接続したことを特徴とするヒューズ内蔵
型双極性固体電解コンデンサ。1. An anode body formed by press-molding a valve metal having an anode lead to be led out, and two capacitor elements each having a cathode conductor layer provided on the peripheral surface of the anode body via an anodized layer and a semiconductor layer. Layers are staggered, metal parts at both ends are different
A built-in fuse type bipolar solid electrolytic capacitor, wherein the capacitor is connected via a low melting point alloy coated with an insulating material so as to be exposed on a surface to be formed.
る両端金属部と各々のコンデンサ素子陰極部とを導電性
接着剤や半田で接続し、２個のコンデンサ素子の陽極リ
ードより各々異なる方向に外部リードを導出したことを
特徴とする請求項１記載のヒューズ内蔵型双極性固体電
解コンデンサ。2. The low melting point alloy is exposed on different surfaces.
That the both end metal portions and each of the capacitor element cathode portion connected with a conductive adhesive or solder, the two claim 1, wherein the derived external leads to different direction from the anode lead of the capacitor element Bipolar solid electrolytic capacitor with built-in fuse.
からなる低融点合金材を、両端金属部が各々異なる面に
露出するように、ポリエステル，ポリイミド等の耐熱性
絶縁性フィルムにてサンドイッチ状にはさんで熱圧着又
は粘着シールし固定してなることを特徴とする請求項１
記載のヒューズ内蔵型双極性固体電解コンデンサ。3. The low-melting alloy is a low-melting alloy made of Sn, Pb or other metal sandwiched with a heat-resistant insulating film of polyester, polyimide or the like such that both metal portions are exposed on different surfaces. 2. A thermo-compression bonding or an adhesive sealing and fixing by sandwiching between shapes.
A bipolar solid electrolytic capacitor with a built-in fuse according to the description.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5251264A JP2570131B2 (en) | 1993-10-07 | 1993-10-07 | Bipolar solid electrolytic capacitor with built-in fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5251264A JP2570131B2 (en) | 1993-10-07 | 1993-10-07 | Bipolar solid electrolytic capacitor with built-in fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07106209A JPH07106209A (en) | 1995-04-21 |
| JP2570131B2 true JP2570131B2 (en) | 1997-01-08 |
Family
ID=17220199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5251264A Expired - Lifetime JP2570131B2 (en) | 1993-10-07 | 1993-10-07 | Bipolar solid electrolytic capacitor with built-in fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2570131B2 (en) |
-
1993
- 1993-10-07 JP JP5251264A patent/JP2570131B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07106209A (en) | 1995-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960820 |