JP2008028074A - Laminated aluminum electrolytic capacitor and manufacturing method therefor - Google Patents

Laminated aluminum electrolytic capacitor and manufacturing method therefor Download PDF

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JP2008028074A
JP2008028074A JP2006197906A JP2006197906A JP2008028074A JP 2008028074 A JP2008028074 A JP 2008028074A JP 2006197906 A JP2006197906 A JP 2006197906A JP 2006197906 A JP2006197906 A JP 2006197906A JP 2008028074 A JP2008028074 A JP 2008028074A
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foil
lead member
electrolytic capacitor
capacitor element
metal case
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Hiroshi Kurimoto
浩 栗本
Junji Yamane
淳二 山根
Kohei Harazono
講平 原薗
Takanao Saito
孝尚 斉藤
Yoshiaki Kuwata
義昭 桑田
Narukuni Iida
成邦 飯田
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/008—Terminals
    • H01G9/012—Terminals specially adapted for solid capacitors

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized laminated aluminum electrolytic capacitor. <P>SOLUTION: The laminated aluminum electrolytic capacitor comprises a laminate with a cathode foil 11 and an anode foil 12 laminated via a separator 13 with respective one end part projected in an opposite direction, a capacitor element 14 having a lead member 15, connected to one end part of the anode foil 11 and a lead member 15 connected to one end part of the cathode foil 12 in the direction opposite to one end part of the anode foil 11, an electrolyte for driving immersed to the capacitor element 14, a metal case 17 for housing the capacitor element 14 with the electrolyte for driving immersed, and an sealing rubber 16 for sealing the opening part of the metal case 17, with the lead member 15 being penetrated. The lead members 15, respectively have flat parts and are connected to one end of the anode foil 11 and the one end of the cathode foil 12 at the flat part, and have an L-shaped part inside the metal case 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は各種電子機器に利用されるアルミ電解コンデンサ及びその製造方法に関するものである。   The present invention relates to an aluminum electrolytic capacitor used in various electronic devices and a method for manufacturing the same.

従来のアルミ電解コンデンサは、弁作用金属箔をエッチングにより粗面化した後、陽極酸化により誘電体酸化皮膜を形成した陽極箔と、この陽極箔の対極である陰極箔とをセパレータを介在させて巻回することによりコンデンサ素子を構成し、そしてこのコンデンサ素子に駆動用電解液を含浸させるとともに、このコンデンサ素子をアルミニウム材よりなる有底円筒状の金属ケース内に収容し、その後、この金属ケースの一端開口部に、内部の駆動用電解液が蒸発しないように封口部材を装着することにより構成している。   Conventional aluminum electrolytic capacitors have a valve-acting metal foil roughened by etching, and then an anode foil in which a dielectric oxide film is formed by anodic oxidation and a cathode foil that is a counter electrode of the anode foil, with a separator interposed therebetween. A capacitor element is formed by winding, and the capacitor element is impregnated with a driving electrolyte, and the capacitor element is housed in a bottomed cylindrical metal case made of an aluminum material. A sealing member is attached to one end opening of the inner surface so that the internal driving electrolyte does not evaporate.

一般にＩＣ化により小型化される傾向にある各種電子機器においては、この種のアルミ電解コンデンサの占める体積は大きいため小型のものが要求されている。そこで、電極箔を薄く形成して巻回密度を向上させるとともに、効率的にエッチング処理を行って電極箔の表面積の拡大を図る等して、コンデンサ素子を小型化することが行われている。   In general, various types of electronic devices that tend to be miniaturized by ICs are required to be small because the volume occupied by this type of aluminum electrolytic capacitor is large. Therefore, the capacitor element is miniaturized by thinly forming the electrode foil to improve the winding density and increasing the surface area of the electrode foil by efficiently performing an etching process.

しかし、この巻回型コンデンサ素子の場合は、陽極箔と陰極箔とをセパレータを介在させて巻回する方式であるため、リアクタンス成分が発生して高周波におけるインピーダンスが高くなって周波数特性が悪くなるという問題点を有している。   However, in the case of this winding type capacitor element, since the anode foil and the cathode foil are wound with a separator interposed, a reactance component is generated, the impedance at high frequency is increased, and the frequency characteristic is deteriorated. Has the problem.

一方、電子機器の筐体内の実装効率を向上させるために電解コンデンサを扁平型にする試みがなされている。しかしながら、この場合、円筒形の巻回型コンデンサ素子を圧縮成形により扁平に加工するものであるため、電極箔の積層間隔が不均一になる等、一般に円筒形のものより電気的特性が低下するものである。   On the other hand, attempts have been made to make the electrolytic capacitor flat to improve the mounting efficiency in the housing of the electronic device. However, in this case, since the cylindrical wound capacitor element is processed flat by compression molding, the electrical characteristics are generally lower than those of the cylindrical one, such as non-uniform stacking intervals of electrode foils. Is.

そこで、このような問題点を解消するために、図５に示すような平板型の積層型電解コンデンサが提案されている。同図において、長方形状に成形され、かつ外方に突出する突出部３１ａを有する陽極箔３１と、同じく長方形状に成形され、かつ外方に突出する突出部３２ａを有する陰極箔３２を、両者陽極箔３１、陰極箔３２間に介在させたセパレータ３３とともに、それぞれの突出部３１ａ，３２ａが対応しないように（直下に位置しないように）交互に重ね合わせて積層し、固定テープ３４で固定することによりコンデンサ素子３５を構成し、そして積層状態の陽極箔３１の突出部３１ａおよび陰極箔３２の突出部３２ａに陽極リード部材３６および陰極リード部材３７を溶着により接続したものである。   Accordingly, in order to solve such problems, a flat plate type multilayer electrolytic capacitor as shown in FIG. 5 has been proposed. In the figure, an anode foil 31 having a protruding portion 31a which is formed in a rectangular shape and protrudes outward, and a cathode foil 32 which is also formed in a rectangular shape and has a protruding portion 32a protruding outward, Along with the separator 33 interposed between the anode foil 31 and the cathode foil 32, the protrusions 31 a and 32 a are alternately stacked so as not to correspond to each other (so as not to be located directly below), and are fixed by the fixing tape 34. Thus, the capacitor element 35 is configured, and the anode lead member 36 and the cathode lead member 37 are connected to the protruding portion 31a of the laminated anode foil 31 and the protruding portion 32a of the cathode foil 32 by welding.

なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献１、特許文献２が知られている。
特開平５−２３４８２７号公報 特開２００５−１２１３３号公報 As prior art document information related to the invention of this application, for example, Patent Document 1 and Patent Document 2 are known.
Japanese Patent Application Laid-Open No. 5-234827 JP 2005-12133 A

しかしながら、図５に示す積層型電解コンデンサは、陽極リード部材３６と陰極リード部材３７をコンデンサ素子３５から導出する場合、長方形状に成形された陽極箔３１と陰極箔３２にそれぞれ外方に突出する突出部３１ａ，３２ａを形成し、これらの突出部３１ａ，３２ａに陽極リード部材３６と陰極リード部材３７を接続するようにしているため、コンデンサ素子３５全体の大きさとしては、突出部３１ａ，３２ａの突出寸法分だけ大きくなり、これにより、電解コンデンサを小型化することが難しいものであった。   However, in the multilayer electrolytic capacitor shown in FIG. 5, when the anode lead member 36 and the cathode lead member 37 are led out from the capacitor element 35, the anode foil 31 and the cathode foil 32 formed in a rectangular shape protrude outwardly, respectively. Since the protruding portions 31a and 32a are formed and the anode lead member 36 and the cathode lead member 37 are connected to the protruding portions 31a and 32a, the overall size of the capacitor element 35 is determined as the protruding portions 31a and 32a. Therefore, it was difficult to reduce the size of the electrolytic capacitor.

本発明はこのような問題点を解決するもので、小型化することができる積層型アルミ電解コンデンサを提供することを目的とするものである。   The present invention solves such problems, and an object of the present invention is to provide a multilayer aluminum electrolytic capacitor that can be miniaturized.

前記課題を解決するために本発明は、それぞれの一端部が反対方向に突出するように陽極箔と陰極箔とをセパレータを介して積層した積層体と、前記陽極箔の一端部に接続されたリード部材と、前記陽極箔の一端部と反対方向の陰極箔の一端部に接続されたリード部材とを備えたコンデンサ素子と、このコンデンサ素子に含浸する駆動用電解液と、この駆動用電解液を含浸したコンデンサ素子を収容する金属ケースと、前記リード部材を貫通させて前記金属ケースの開口部を封止する封口ゴムを備え、前記リード部材は、それぞれ扁平部を有しこの扁平部にて陽極箔の一端部および陰極箔の一端部にそれぞれ接続されるとともに前記金属ケース内にてＬ字部を有することを特徴とするものである。   In order to solve the above problems, the present invention is connected to a laminated body in which an anode foil and a cathode foil are laminated via a separator so that each one end protrudes in the opposite direction, and to one end of the anode foil. A capacitor element comprising a lead member and a lead member connected to one end of the cathode foil opposite to the one end of the anode foil, a driving electrolyte impregnating the capacitor element, and the driving electrolyte And a sealing rubber that seals the opening of the metal case through the lead member, and each of the lead members has a flat portion. It is connected to one end part of the anode foil and one end part of the cathode foil, and has an L-shaped part in the metal case.

また、前記金属ケースの開口部と接するように中空状の角形絶縁座板を配置し、封口ゴムから貫通させた一対のリード部材を、前記角形絶縁座板の少なくとも底面から外周面にかけて設けた一対の外部端子にそれぞれ接続した面実装用の積層型アルミ電解コンデンサとするものである。   Also, a pair of hollow rectangular insulating seat plates arranged so as to be in contact with the opening of the metal case, and a pair of lead members penetrating from the sealing rubber are provided from at least the bottom surface to the outer peripheral surface of the rectangular insulating seat plate. The surface mount multilayer aluminum electrolytic capacitor is connected to each external terminal.

また本発明の製造方法は、陽極箔と陰極箔をセパレータを介して順次積層して前記陽極箔と陰極箔それぞれの一端部を反対方向に突出するようにしたコンデンサ素子を形成する工程と、扁平部を有するとともにその扁平部をＬ字に折り曲げた陽極及び陰極のリード部材を、封口ゴムに貫通させて固定する工程と、前記扁平部を前記コンデンサ素子の突出させた前記端部とそれぞれ接続する工程と、前記リード部材を接続した前記コンデンサ素子に駆動用電解液を含浸させる工程と、このコンデンサ素子を有底筒状の金属ケースに挿入し、その金属ケースの開口部を前記封口ゴムで封止する工程を備えた積層型アルミ電解コンデンサの製造方法とするものである。   The manufacturing method of the present invention includes a step of forming a capacitor element in which an anode foil and a cathode foil are sequentially laminated via a separator so that one end of each of the anode foil and the cathode foil protrudes in the opposite direction; A step of fixing the anode and cathode lead members having a flat portion bent into an L-shape through a sealing rubber, and connecting the flat portion to the protruding end of the capacitor element, respectively. A step of impregnating the capacitor element connected to the lead member with a driving electrolyte; and inserting the capacitor element into a bottomed cylindrical metal case, and sealing the opening of the metal case with the sealing rubber. A method for manufacturing a multilayer aluminum electrolytic capacitor including a step of stopping is provided.

本発明の構成による積層型アルミ電解コンデンサにおいて、リード部材の扁平部をコンデンサ素子の突出させた一端部とそれぞれ接続することにより、小型化をすることができる。また、金属ケース内に容易に収納することができ、さらには、積層体を作製後リード部材をＬ字に折り曲げてコンデンサ素子に接続することで、従来のようにリード部材を電極箔に接続した後巻回することによって発生するコンデンサ素子とリード部材の接続部分の応力が加わらないことから、前記接続部分が弱くなることによって発生するＥＳＲ悪化を抑制することができ、低ＥＳＲ特性を有した積層型アルミ電解コンデンサを得ることができる。   In the multilayer aluminum electrolytic capacitor according to the configuration of the present invention, it is possible to reduce the size by connecting the flat portion of the lead member to the projecting one end portion of the capacitor element. Moreover, it can be easily accommodated in a metal case. Furthermore, after producing a laminate, the lead member is bent into an L shape and connected to the capacitor element, so that the lead member is connected to the electrode foil as in the past. Since the stress at the connecting portion between the capacitor element and the lead member generated by the subsequent winding is not applied, the ESR deterioration caused by the weakening of the connecting portion can be suppressed, and the multilayer having low ESR characteristics Type aluminum electrolytic capacitors can be obtained.

また、金属ケースの開口部と接するように中空状の角形絶縁座板を配置し、封口ゴムから貫通させた一対のリード部材を、前記角形絶縁座板の少なくとも底面から外周面にかけて設けた一対の外部端子にそれぞれ接続することにより、リード部材に応力を加えることなく絶縁座板を取り付けることができ、さらに、プリント基板への半田付け時の接合強度が金属ケース側に折り曲げた外部端子により強度に接続することができる。   In addition, a pair of hollow rectangular insulating seat plates arranged so as to contact the opening of the metal case and a pair of lead members penetrating from the sealing rubber are provided from at least the bottom surface to the outer peripheral surface of the rectangular insulating seat plate. By connecting to each external terminal, it is possible to attach the insulating seat plate without applying stress to the lead member. Furthermore, the bonding strength when soldering to the printed circuit board is increased by the external terminal bent to the metal case side. Can be connected.

また、本発明の製造方法とすることにより、封口ゴムに固定されたリード部材をコンデンサ素子の電極部に接続するので、その後の工程においても電極部の接続箇所に応力がかかることがないので、コンデンサ特性の問題を起こすことはない。   In addition, since the lead member fixed to the sealing rubber is connected to the electrode portion of the capacitor element by using the manufacturing method of the present invention, stress is not applied to the connection portion of the electrode portion even in the subsequent steps. There is no problem with the capacitor characteristics.

以下、本発明の実施の形態を添付図面にもとづいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

（実施の形態１）
図１は本発明の実施の形態１の積層型アルミ電解コンデンサの構成を示した断面図、図２はリード部材の斜視図である。図１において、１１は長方形状に成形された陽極箔で、この陽極箔１１は弁作用金属であるアルミニウム箔をエッチングにより粗面化した後、陽極酸化により誘電体酸化皮膜を形成したものである。１２は陽極箔１１と対極するアルミニウム箔よりなる陰極箔で、この陰極箔１２は陽極箔１１と同じ大きさの長方形状に成形されている。１３は陽極箔１１と陰極箔１２の間に介在して陽極箔１１と陰極箔１２が直接接触するのを防止する絶縁体の役目を果たすセパレータで、このセパレータ１３は陽極箔１１と陰極箔１２が重なり合う部分の大きさの長方形状に成形されている。 (Embodiment 1)
FIG. 1 is a cross-sectional view showing a configuration of a multilayer aluminum electrolytic capacitor according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view of a lead member. In FIG. 1, 11 is an anode foil formed into a rectangular shape. This anode foil 11 is obtained by roughening an aluminum foil, which is a valve metal, by etching and then forming a dielectric oxide film by anodic oxidation. . Reference numeral 12 denotes a cathode foil made of an aluminum foil opposite to the anode foil 11. The cathode foil 12 is formed in a rectangular shape having the same size as the anode foil 11. A separator 13 is interposed between the anode foil 11 and the cathode foil 12 and serves as an insulator that prevents direct contact between the anode foil 11 and the cathode foil 12. The separator 13 is the anode foil 11 and the cathode foil 12. Are formed in a rectangular shape with the size of the overlapping part.

そして陽極箔１１の一方の端部に電極部１１ａを設け、その対向する陰極箔１２には、前記電極部１１ａを設けた陽極箔１１の端面と対向する端面に電極部１２ａを設け、さらに前記陽極箔１１と陰極箔１２の間にセパレータ１３を介して積層することによりコンデンサ素子１４を形成する。なお、コンデンサ素子１４は、アルミ電解コンデンサの組み立ての作業性を考慮して、コンデンサ素子１４の中心部を固定テープで固定しても良い。   And the electrode part 11a is provided in one end part of the anode foil 11, the electrode part 12a is provided in the end face opposite to the end face of the anode foil 11 provided with the electrode part 11a in the opposing cathode foil 12, A capacitor element 14 is formed by laminating the anode foil 11 and the cathode foil 12 with a separator 13 interposed therebetween. The capacitor element 14 may be fixed with a fixing tape at the center of the capacitor element 14 in consideration of the workability of assembling the aluminum electrolytic capacitor.

１５はリード部材で、図２に示すように丸棒部１５ｂの一部を扁平にし、その一部をＬ字に折り曲げて固定リブ１５ａを形成し、前記丸棒部１５ｂを封口ゴム１６に貫通させて固定リブ１５ａを封口ゴム１６の内面に当接させることでリード部材１５を封口ゴム１６に固定するようにしている。   Reference numeral 15 denotes a lead member. As shown in FIG. 2, a part of the round bar part 15b is flattened, and a part of the round bar part 15b is bent into an L shape to form a fixing rib 15a. Thus, the lead member 15 is fixed to the sealing rubber 16 by bringing the fixing rib 15 a into contact with the inner surface of the sealing rubber 16.

この封口ゴム１６は、ブチルゴムに架橋剤、架橋助剤、補強剤または充填剤、劣化防止剤等を添加して混練し、その後真空中で成形加工し、さらに真空中で二次架橋させるアニール処理したものである。   The sealing rubber 16 is an annealing treatment in which a butyl rubber is added with a crosslinking agent, a crosslinking aid, a reinforcing agent or a filler, a deterioration preventing agent, and the like, kneaded, then molded in a vacuum, and further subjected to secondary crosslinking in a vacuum. It is a thing.

前記ブチルゴムは、不飽和度１．２〜２．５ｍｏｌ％のポリマーをアルキルフェノールホルムアルデヒド樹脂で架橋したブチルゴムを主成分とするものであり、不飽和度１．２〜２．５ｍｏｌ％のポリマーをアルキルフェノールホルムアルデヒド樹脂で架橋することにより、架橋反応を速めて架橋性を高めることができる。これにより、補強剤をブチルゴムの等量以上含有してもブチルゴムとして無数の網目構造を保持しつつ、硬度を国際ゴム硬さ（ＩＲＨＤ）によるマイクロウォーレス硬さを８０Ｈｗ以上、かつ半田リフロー温度における弾性率を４Ｎ／ｍｍ2以上にすることができるので、その結果、リード部材１５の一部をＬ字に折り曲げた固定リブ１５ａを封口ゴム１６に固定しても、封口ゴム１６の硬度によりリード部材１５全体を固定することができる。 The butyl rubber is mainly composed of butyl rubber obtained by crosslinking a polymer having an unsaturation degree of 1.2 to 2.5 mol% with an alkylphenol formaldehyde resin, and the polymer having an unsaturation degree of 1.2 to 2.5 mol% is an alkylphenol formaldehyde. By crosslinking with a resin, the crosslinking reaction can be accelerated and the crosslinking property can be enhanced. As a result, even if the reinforcing agent is contained in an amount equal to or greater than that of butyl rubber, the microwallless hardness of the international rubber hardness (IRHD) is 80 Hw or more and the elasticity at the solder reflow temperature while maintaining an innumerable network structure as butyl rubber. The rate can be 4 N / mm 2 or more. As a result, even if the fixing rib 15 a obtained by bending a part of the lead member 15 into an L-shape is fixed to the sealing rubber 16, the lead member depends on the hardness of the sealing rubber 16. The whole 15 can be fixed.

また、前記封口ゴム１６にフェノール類及びその誘導体のいずれか１つ以上を含有することにより、半田リフロー温度による熱劣化の影響を抑制することができるので、引っ張り強度、硬さ等の機械的性質を向上させることができる。   Moreover, since the sealing rubber 16 contains any one or more of phenols and derivatives thereof, the influence of thermal deterioration due to the solder reflow temperature can be suppressed, so that mechanical properties such as tensile strength and hardness are obtained. Can be improved.

なお、前記フェノール類とは、フェノールのｏ，ｍ，ｐ位にアルキル基、水酸基、スルフヒドリル基を有するもので、およびその誘導体は上記フェノール類が炭素または硫黄またはアルキル基等により２量化、３量化したもので、例えば、２，６−Ｄｉ−ｔｅｒｔ−ブチル−４−メチルフェノール、２，５−Ｄｉ−ｔｅｒｔ−アミルヒドロキノン、２，５−Ｄｉ−ｔｅｒｔ−ブチルヒドロキノン、４−メチル−６−ｔｅｒｔ−ブチルフェノール等である。   The phenols are those having an alkyl group, a hydroxyl group or a sulfhydryl group at the o, m, and p positions of the phenol, and their derivatives are dimerized and trimerized by the above-described phenols with carbon, sulfur, alkyl groups or the like. For example, 2,6-Di-tert-butyl-4-methylphenol, 2,5-Di-tert-amylhydroquinone, 2,5-Di-tert-butylhydroquinone, 4-methyl-6-tert -Butylphenol and the like.

また、ブチルゴムの特性を損なわない程度にブタジエンゴム（ＢＲ）、スチレンブタジエンゴム（ＳＢＲ）、エチレン−プロピレンの共重合体ゴム（ＥＰＭ）、エチレン−プロピレン−ジエンの三元共重合体ゴム（ＥＰＤＭ）、ウレタンゴム（Ｕ）、シリコーンゴム（Ｑ）、クロロスルホン化ポリエチレンゴム（ＣＳＭ）を併用しても構わない。   Also, butadiene rubber (BR), styrene butadiene rubber (SBR), ethylene-propylene copolymer rubber (EPM), ethylene-propylene-diene terpolymer rubber (EPDM) to such an extent that the characteristics of butyl rubber are not impaired. Urethane rubber (U), silicone rubber (Q), and chlorosulfonated polyethylene rubber (CSM) may be used in combination.

そして封口ゴム１６に固定されたリード部材１５の扁平部に前記コンデンサ素子１４の電極部１１ａ，１２ａを積層方向すなわち垂直方向に接続する。   The electrode portions 11a and 12a of the capacitor element 14 are connected to the flat portion of the lead member 15 fixed to the sealing rubber 16 in the stacking direction, that is, the vertical direction.

この接続方法は、超音波溶接、レーザー溶接、冷間圧接溶接などにより接続することができる。特に超音波溶接は、陽極箔１１及び陰極箔１２の未エッチング部分とリード部材１５とが接合するように溶接されるので好ましい。   This connection method can be connected by ultrasonic welding, laser welding, cold welding, or the like. In particular, ultrasonic welding is preferable because the unetched portions of the anode foil 11 and the cathode foil 12 and the lead member 15 are welded.

そして前記コンデンサ素子１４に電解液を含浸させて金属ケース１７に挿入して、その開放端に封口ゴム１６を装着後、カーリング加工して金属ケース１７を封止する。この含浸方法としては、コンデンサ素子１４を減圧化で電解液を含浸させるか、金属ケース１７内に電解液を注入後、コンデンサ素子１４を挿入し、金属ケース１７内を減圧にして含浸させる方法などがある。   Then, the capacitor element 14 is impregnated with an electrolytic solution and inserted into the metal case 17, and the sealing rubber 16 is attached to the open end, and then the metal case 17 is sealed by curling. As the impregnation method, the capacitor element 14 is impregnated with an electrolytic solution by reducing the pressure, or the electrolytic solution is injected into the metal case 17 and then the capacitor element 14 is inserted to impregnate the metal case 17 with a reduced pressure. There is.

本実施の形態１の構成にすることにより、リード部材１５の丸棒部１５ｂが封口ゴム１６を貫通して固定され、リード部材１５の扁平部をＬ字に折り曲げてコンデンサ素子１４の突出させた電極部１１ａ，１２ａと垂直にそれぞれ接続することにより、金属ケース１７内に容易に収容することができ、また、リード部材１５が封口ゴム１６により密閉されるので液漏れなどの問題を引き起こすこともない。   With the configuration of the first embodiment, the round bar portion 15b of the lead member 15 is fixed through the sealing rubber 16, and the flat portion of the lead member 15 is bent into an L shape so that the capacitor element 14 protrudes. By connecting each of the electrode portions 11a and 12a vertically, it can be easily accommodated in the metal case 17, and the lead member 15 is sealed by the sealing rubber 16 so that problems such as liquid leakage may occur. Absent.

さらには、リード部材１５をＬ字に折り曲げてコンデンサ素子１４に対して垂直方向に接続するので、あらかじめリード部材１５を電極箔に接続して積層又は巻回して組立てる場合に発生する応力がコンデンサ素子１４とリード部材１５の接続部分に加わらないことから、低ＥＳＲ特性を有した積層型アルミ電解コンデンサを得ることができる。   Further, since the lead member 15 is bent in an L shape and connected to the capacitor element 14 in the vertical direction, the stress generated when the lead member 15 is connected to the electrode foil in advance and stacked or wound is assembled. Therefore, a multilayer aluminum electrolytic capacitor having low ESR characteristics can be obtained.

（実施の形態２）
図３は本発明の実施の形態２の面実装用の積層型アルミ電解コンデンサの構成を示した断面図、図４は中空状の絶縁座板の斜視図である。図３において、積層型アルミ電解コンデンサは前記実施の形態１で用いたものと同じである。すなわち、陽極箔１１の一方の端面と、その対向する陰極箔１２の端面とを露出させてそれぞれの電極部１１ａ，１２ａを設けるようにセパレータ１３を介して積層することによりコンデンサ素子１４を形成する。一方、丸棒部１５ｂを封口ゴム１６に貫通させて固定リブ１５ａによりリード部材１５を封口ゴム１６に固定させる。そして封口ゴム１６に固定されたリード部材１５の扁平部に前記コンデンサ素子１４の電極部１１ａ，１２ａを積層方向すなわち垂直方向に接続した後、前記コンデンサ素子１４に電解液を含浸させて金属ケース１７に挿入して、その開放端に封口ゴム１６を装着後、カーリング加工して金属ケース１７を封止することにより積層型アルミ電解コンデンサが構成されている。 (Embodiment 2)
FIG. 3 is a cross-sectional view showing a configuration of a surface-mounting multilayer aluminum electrolytic capacitor according to Embodiment 2 of the present invention, and FIG. 4 is a perspective view of a hollow insulating seat plate. In FIG. 3, the multilayer aluminum electrolytic capacitor is the same as that used in the first embodiment. That is, the capacitor element 14 is formed by laminating through the separator 13 so that one end face of the anode foil 11 and the end face of the opposing cathode foil 12 are exposed and the respective electrode portions 11a and 12a are provided. . On the other hand, the round bar portion 15b is passed through the sealing rubber 16, and the lead member 15 is fixed to the sealing rubber 16 by the fixing rib 15a. Then, the electrode portions 11a and 12a of the capacitor element 14 are connected to the flat portion of the lead member 15 fixed to the sealing rubber 16 in the laminating direction, that is, the vertical direction, and then the capacitor element 14 is impregnated with an electrolytic solution to form a metal case 17. The laminated aluminum electrolytic capacitor is configured by inserting the sealing rubber 16 into the open end, and curling the metal case 17 after mounting the sealing rubber 16 on the open end.

この積層型アルミ電解コンデンサの金属ケース１７の開口部と接するように図４に示した環状の角形絶縁座板２１を配置し、封口ゴム１６から露出させたリード部材１５の丸棒部１５ｂの先端２３に、絶縁座板２１の底面を沿わせて金属ケースの外周面側に折り曲げた外部端子２２をレーザー溶接などで接続した構成とするものである。   4 is arranged so as to contact the opening of the metal case 17 of the multilayer aluminum electrolytic capacitor, and the tip of the round bar portion 15b of the lead member 15 exposed from the sealing rubber 16 is disposed. The external terminal 22 bent to the outer peripheral surface side of the metal case along the bottom surface of the insulating seat plate 21 is connected to 23 by laser welding or the like.

本実施の形態２の構成にすることにより、リード部材１５に応力を加えることなく絶縁座板２１を取り付けることができ、さらに、プリント基板への半田付け時の接合強度が金属ケースの外周面側に折り曲げた外部端子２２により強度に接続することができる。   By adopting the configuration of the second embodiment, it is possible to attach the insulating seat plate 21 without applying stress to the lead member 15, and the bonding strength when soldering to the printed circuit board is on the outer peripheral surface side of the metal case. The external terminal 22 bent in the direction can be connected to the strength.

なお、リード部材１５はアルミ材を用い、外部端子２２が鉄にＳｎメッキを施したものを用いるとその溶接が難しいので、リード部材１５の先端２３に、鉄製のキャップにＳｎメッキを施したものを嵌合してから外部端子２２をレーザー溶接で接続することにより、より容易に溶接ができ、しかも接続強度を向上させることができる。   The lead member 15 is made of an aluminum material, and if the external terminal 22 is made of iron plated with Sn, it is difficult to weld. Therefore, the lead cap 15 is made of an iron cap with Sn plated. By connecting the external terminals 22 by laser welding after fitting, the welding can be performed more easily and the connection strength can be improved.

また、本実施の形態では丸棒部１５ｂの一部を扁平にし、その一部をＬ字に折り曲げて固定リブ１５ａを形成したリード部材１５を用いたが、丸棒部１５ｂの一部を折り曲げないで鍔付き部を設けたものでも本発明と同様の効果を奏することができる。   Further, in the present embodiment, the lead member 15 in which a part of the round bar part 15b is flattened and part of the round bar part 15b is bent into an L shape to form the fixing rib 15a is used, but a part of the round bar part 15b is bent. Even if a hooked portion is provided, the same effect as the present invention can be obtained.

本発明は、陽極リード部材と陰極リード部材をコンデンサ素子から効果的に導出させることによりアルミ電解コンデンサを小型化することができ、ＩＣ化により小型化される傾向にある各種電子機器のアルミ電解コンデンサとして用いることができる。   The present invention can reduce the size of an aluminum electrolytic capacitor by effectively deriving an anode lead member and a cathode lead member from a capacitor element, and can reduce the size of an aluminum electrolytic capacitor in various electronic devices that are likely to be downsized by using an IC. Can be used as

本発明の実施の形態１の積層型アルミ電解コンデンサの構成を示す断面図Sectional drawing which shows the structure of the multilayer aluminum electrolytic capacitor of Embodiment 1 of this invention 同リード部材の構成を示す斜視図The perspective view which shows the structure of the lead member 本発明の実施の形態２の積層型アルミ電解コンデンサの構成を示す断面図Sectional drawing which shows the structure of the multilayer aluminum electrolytic capacitor of Embodiment 2 of this invention 同中空状の絶縁座板を示す斜視図A perspective view showing the hollow insulating seat plate 従来の積層型のコンデンサ素子の構成を示す斜視図A perspective view showing a configuration of a conventional multilayer capacitor element

符号の説明Explanation of symbols

１１ 陽極箔
１１ａ 陽極箔の電極部
１２ 陰極箔
１２ａ 陰極箔の電極部
１３ セパレータ
１４ コンデンサ素子
１５ リード部材
１５ａ 固定リブ
１５ｂ 丸棒部
１６ 封口ゴム
１７ 金属ケース
２１ 角形絶縁座板 DESCRIPTION OF SYMBOLS 11 Anode foil 11a Electrode part of anode foil 12 Cathode foil 12a Electrode part of cathode foil 13 Separator 14 Capacitor element 15 Lead member 15a Fixing rib 15b Round bar part 16 Sealing rubber 17 Metal case 21 Rectangular insulating seat plate

Claims (8)

それぞれの一端部が反対方向に突出するように陽極箔と陰極箔とをセパレータを介して積層した積層体と、前記陽極箔の一端部に接続されたリード部材と、前記陽極箔の一端部と反対方向の、陰極箔の一端部に接続されたリード部材とを備えたコンデンサ素子と、このコンデンサ素子に含浸する駆動用電解液と、この駆動用電解液を含浸したコンデンサ素子を収容する金属ケースと、前記リード部材を貫通させて前記金属ケースの開口部を封止する封口ゴムを備え、前記リード部材は、それぞれ扁平部を有しこの扁平部にて陽極箔の一端部および陰極箔の一端部にそれぞれ接続されるとともに前記金属ケース内にてＬ字部を有することを特徴とする積層型アルミ電解コンデンサ。 A laminate in which anode foil and cathode foil are laminated via a separator so that each one end protrudes in the opposite direction, a lead member connected to one end of the anode foil, and one end of the anode foil A capacitor element having a lead member connected to one end of the cathode foil in the opposite direction, a driving electrolyte solution impregnated in the capacitor element, and a metal case containing the capacitor element impregnated with the driving electrolyte solution And a sealing rubber that penetrates the lead member and seals the opening of the metal case, the lead members each having a flat portion, and one end of the anode foil and one end of the cathode foil at the flat portion A laminated aluminum electrolytic capacitor characterized in that it is connected to each of the parts and has an L-shaped part in the metal case. Ｌ字部は、扁平部に設けてなる請求項１に記載の積層型アルミ電解コンデンサ。 The multilayer aluminum electrolytic capacitor according to claim 1, wherein the L-shaped portion is provided in the flat portion. 陽極箔および陰極箔の一端部にそれぞれ貫通孔を設け、この貫通孔にリード部材の扁平部をそれぞれ貫通させて溶接によりそれぞれ接続した請求項１記載の積層型アルミ電解コンデンサ。 2. The multilayer aluminum electrolytic capacitor according to claim 1, wherein through holes are respectively provided at one end portions of the anode foil and the cathode foil, and the flat portions of the lead members are respectively passed through the through holes and connected by welding. リード部材のＬ字部を封口ゴムの表面に押し当て固定するようにした請求項１に記載の積層型アルミ電解コンデンサ。 The multilayer aluminum electrolytic capacitor according to claim 1, wherein the L-shaped portion of the lead member is pressed against and fixed to the surface of the sealing rubber. 金属ケースの開口部と接するように中空状の角形絶縁座板を配置し、封口ゴムから貫通させた一対のリード部材を、前記角形絶縁座板の少なくとも底面から外周面にかけて設けた一対の外部端子にそれぞれ接続した請求項１に記載の積層型アルミ電解コンデンサ。 A pair of external terminals in which a hollow rectangular insulating seat plate is disposed so as to be in contact with the opening of the metal case, and a pair of lead members penetrating from the sealing rubber is provided from at least the bottom surface to the outer peripheral surface of the rectangular insulating seat plate. The multilayer aluminum electrolytic capacitor according to claim 1, which is connected to each other. リード部材の先端部に鉄製のキャップを嵌合させた請求項５に記載の積層型アルミ電解コンデンサ。 The multilayer aluminum electrolytic capacitor according to claim 5, wherein an iron cap is fitted to the tip of the lead member. 陽極箔と陰極箔をセパレータを介して順次積層して前記陽極箔と陰極箔それぞれの一端部を反対方向に突出するようにしたコンデンサ素子を形成する工程と、扁平部を有するとともにその扁平部をＬ字に折り曲げた陽極及び陰極のリード部材を封口ゴムに貫通させて固定する工程と、前記扁平部を前記コンデンサ素子の突出させた前記端部とそれぞれ接続する工程と、前記リード部材を接続した前記コンデンサ素子に駆動用電解液を含浸させる工程と、このコンデンサ素子を有底筒状の金属ケースに挿入し、その金属ケースの開口部を前記封口ゴムで封止する工程を備えた積層型アルミ電解コンデンサの製造方法。 A step of forming a capacitor element in which an anode foil and a cathode foil are sequentially laminated via a separator so that one end of each of the anode foil and the cathode foil protrudes in the opposite direction; and a flat portion and a flat portion A process of fixing the lead members of the anode and the cathode bent in an L shape through the sealing rubber, a step of connecting the flat portion to the protruding end of the capacitor element, and a connection of the lead member Laminated aluminum comprising the steps of impregnating the capacitor element with a driving electrolyte, and inserting the capacitor element into a bottomed cylindrical metal case and sealing the opening of the metal case with the sealing rubber Manufacturing method of electrolytic capacitor. 金属ケースの開口部と接するように中空状の角形絶縁座板を配置し、封口ゴムから貫通させたリード部材を、前記角形絶縁座板の少なくとも底面から外周面にかけて設けた外部端子に接続する工程をさらに備えた請求項７に記載の積層型アルミ電解コンデンサの製造方法。 A step of disposing a hollow rectangular insulating seat so as to be in contact with the opening of the metal case, and connecting a lead member penetrating from the sealing rubber to an external terminal provided from at least the bottom surface to the outer peripheral surface of the rectangular insulating seat plate. The method for producing a multilayer aluminum electrolytic capacitor according to claim 7, further comprising:
JP2006197906A 2006-07-20 2006-07-20 Laminated aluminum electrolytic capacitor and manufacturing method therefor Pending JP2008028074A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109509640A (en) * 2018-12-27 2019-03-22 南通瑞泰电子有限公司 A kind of aluminium electrolutic capacitor being easily installed
WO2023120707A1 (en) * 2021-12-24 2023-06-29 パナソニックＩｐマネジメント株式会社 Method for producing electrolytic capacitor
WO2024021210A1 (en) * 2022-07-29 2024-02-01 湖南艾华集团股份有限公司 Jelly roll, and aluminum electrolytic capacitor and packaging method therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109509640A (en) * 2018-12-27 2019-03-22 南通瑞泰电子有限公司 A kind of aluminium electrolutic capacitor being easily installed
WO2023120707A1 (en) * 2021-12-24 2023-06-29 パナソニックＩｐマネジメント株式会社 Method for producing electrolytic capacitor
WO2024021210A1 (en) * 2022-07-29 2024-02-01 湖南艾华集团股份有限公司 Jelly roll, and aluminum electrolytic capacitor and packaging method therefor

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