JPS6049622A - Method of producing electrolytic condenser - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明はコンデンサ素子な熱融着性フィルム化（２） 含むラミネートフィルム化用いてパッケージした電解コ
ンデンサの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an electrolytic capacitor packaged using a laminated film, including forming a capacitor element into a heat-sealable film (2).

従来コンデンサ素子をラミネートフィルムでパッケージ
した電解コンデンサは粗面化し化成皮膜欠生成したアル
ミ箔を陽極箔とし、これにリード線端子ケ取着したもの
と粗面化したアルミ箔ケ陰極箔としこれにリード線端子
ケ取着したものとを一対とし、これらをスペーサ２介し
て巻回してコンデンサ素子層形成（−だのち該コンデン
サ素子ケ圧潰して偏平なコンデンサ素子ケ得ていた。こ
の偏平コンデンサ素子に駆動用電解液ケ含浸しこれ２熱
融着性樹脂フィルム、アルミ箔、ポリエステルフィルム
などの：（層ラミネートフィルムの中に収容し該ラミネ
ートフイルムケ加熱圧着して封口していた。しかしなが
ら上記のような構成からなる電解コンデンサはコンデン
サ素子ケ巻回てろときのリード線端子の位置のバラツキ
を生じたり、ラミネートフイルムケ加熱圧着したときに
リード線端子、特にアルミ丸線とリード線との接続部分
で熱融着性樹脂が溶融して逃げラミネートフィル人中の
アルミ箔とリード線端子とが接触する場合があり、陽極
リード線端子と陰極リード線端子とがそれぞれラミネー
トのアルミ箔に接触した場合は短絡となる問題点があっ
た。またコンデンサ素子の形成手段が巻回であるため巻
回できる陽・陰極箔の大きさに自ずと限界があり、その
寸法は陽極箔で幅２ｍｍ　、Ｘ長さ１０１Ｉ１１であり
、この巻回体ケ圧潰したコンデンサ素子の寸法は幅４．
４Ｍ１１×長さ３關×厚さ１．２龍となる。したがって
この寸法以下の小容量のコンデンサ２得ようとする場合
には陽極箔の化成電圧ケ高くして単位面積当たりの静電
容量ケ小さくしてアルミ箔の寸法が前述の寸法に達する
まで大きくして使用しなけｆｔはならないという制約が
あった。このように従来のラミネートフィルム化用いて
パッケージした電解コンデンサでは小形化に限度があり
、かつ小容量の場合には容量に応じた小形化をできない
欠点があった。Conventional electrolytic capacitors, in which a capacitor element is packaged with a laminated film, use aluminum foil with a roughened surface and no chemical coating as an anode foil, and a lead wire terminal is attached to this as an anode foil, and a roughened aluminum foil is used as a cathode foil. A pair of lead wire terminals and a capacitor element layer were formed by winding them with a spacer 2 in between.The capacitor element was then crushed to obtain a flat capacitor element. It was impregnated with a driving electrolyte, then housed in a 2-layer laminate film such as a heat-fusible resin film, aluminum foil, or polyester film, and the laminate film was heat-pressed and sealed. Electrolytic capacitors with such a configuration may have variations in the position of the lead wire terminals when the capacitor element is wound, or when the laminate film is heated and crimped, the lead wire terminals, especially the connection area between the round aluminum wire and the lead wire. If the heat-sealable resin melts and escapes, the aluminum foil inside the laminate film may come into contact with the lead wire terminal, and if the anode lead wire terminal and the cathode lead wire terminal each come into contact with the aluminum foil of the laminate. There was a problem of short circuit.Also, since the method of forming the capacitor element is winding, there is a natural limit to the size of the anode and cathode foils that can be wound. 101I11, and the dimensions of the crushed capacitor element of this wound body are width 4.
It will be 4M11 x length 3 x thickness 1.2 length. Therefore, if you are trying to obtain a capacitor 2 with a small capacity below this dimension, increase the anode foil's formation voltage, decrease the capacitance per unit area, and increase the aluminum foil dimension until it reaches the above-mentioned dimension. There was a restriction that FT had to be used. As described above, conventional electrolytic capacitors packaged using laminated films have the disadvantage that there are limits to miniaturization, and in the case of small capacitances, it is not possible to miniaturize the capacitors according to the capacitance.

さらにコンデンサ素子は巻回体ケ圧潰して得ているので
薄さにも限度があり、圧潰されたコンデンサ素子が原状
に復する反発力を生ずることと合せて薄形化の推進を阻
害していた。Furthermore, since the capacitor element is obtained by crushing the wound body, there is a limit to how thin it can be, and this, together with the fact that the crushed capacitor element generates a repulsive force to return to its original state, hinders the promotion of thinner designs. Ta.

本発明は上記の欠点ケ除去するためになされたもので短
絡不良？減少せしめ小形化、薄形化できる電解コンデン
サの製造方法を提供せんとするものである。以下図面ケ
参照しながら説明する。第１図に示すようにアルミ箔ケ
粗面化し化成皮膜ケ生成して角旗状の陽極箔（１）層形
成し、該陽極箔（１）の−角に設けた突出部（２１に洋
白、Ｎｉ、Ｆｅ、Ｃｕなどのはんだ付は可能な薄い板ま
たは箔からなる外部陽極端子（３）ケミ気、超音波、レ
ーザーなどの溶接やコールドウェルド、あるいはかしめ
などで接続し該接続部に樹脂やガラスなどの絶縁物（４
）ヲ塗布し硬化させる。また第２図に示すようにアルミ
箔欠粗面化し角旗状の陰極箔（５）層形成するが、該陰
極箔（５）の旗状の部分は前記陽極箔（１）を上下両面
から後述するスペーサ欠介して挟み込むために該陽極箔
（１）の旗状の部分の約２倍の長さを有する。The present invention was made to eliminate the above-mentioned drawbacks, and is it a short circuit failure? It is an object of the present invention to provide a method for manufacturing an electrolytic capacitor that can be reduced in size and thickness. This will be explained below with reference to the drawings. As shown in Figure 1, the surface of the aluminum foil is roughened and a chemical conversion film is formed to form a flag-shaped anode foil (1) layer, and a protrusion (21) provided at the negative corner of the anode foil (1) is formed. External anode terminal made of a thin plate or foil that can be soldered with white, Ni, Fe, Cu, etc. (3) Connect by chemical, ultrasonic, laser, etc. welding, cold welding, or caulking to the connection part. Insulating materials such as resin and glass (4
) Apply and cure. In addition, as shown in FIG. 2, a square flag-shaped cathode foil (5) layer is formed by roughening the aluminum foil. The anode foil (1) has a length approximately twice as long as the flag-shaped portion of the anode foil (1) because it is sandwiched by a spacer which will be described later.

該陰極箔（５）の突出部（６）にも前述の陽極箔（１）
の場合と同様はんだ付は可能な外部陰極端子（７）欠接
続し該接続部に絶縁物（８）欠塗布し硬化させる。次い
で第３図に示すように該陰極箔（５）の寸法以上の寸法
を有するコンデンサ紙などのスペーサ（９）を２つ折り
して前記陽極箔（１）ヲ挟み、さらに該スペーサ（９）
上から旗状部分ヶ長さ方向に２つ折りした前記陰極箔（
５）で挟み込む。したがって陽極箔（１）の両面にはス
ペーサ（９）欠介して陰極箔（５）が対向して配され同
一端面から外部陽極端子（３）と外部陰極端子（７）と
が引出された構成からなるコンデンサ素子（１０）２得
ることができる。このスペーサ（９）に駆動用電解液を
含浸させたら第４図のようにたとえばアイオノマー、ポ
リエチレン、ポリアミドなどの熱融着性樹脂フィルム（
１１）＋アルミ箔（１２）＋ポリエステルフィルム、塩
化ビニリデン、弗素系樹脂などの外装フィルム（１３）
からなるラミネートフィルム（１／Ｉ）の中に前記コン
デンサ素子（１，０）’４収容し前記ラミネートフィル
ム（１４）の熱融着性樹脂フィルム同志が合うようにし
てコンデンサ素子（１ｏ）の周囲ケ加熱・圧ＭＬ熱融着
性樹脂フーｒルム乞接着して第５図１（示すような偏Ｘ
Ｖな角形コンデンサを得ることができる。　次いで実施
例について述べる。The above-mentioned anode foil (1) is also attached to the protrusion (6) of the cathode foil (5).
As in the case of , the external cathode terminal (7), which can be soldered, is disconnected, and the insulating material (8) is applied to the connection portion and cured. Next, as shown in FIG. 3, a spacer (9) such as a capacitor paper having a size larger than that of the cathode foil (5) is folded in half and sandwiched between the anode foil (1) and the spacer (9).
The above-mentioned cathode foil (which is folded in half in the length direction of the flag-shaped part from above)
5) Insert. Therefore, the cathode foil (5) is arranged facing each other on both sides of the anode foil (1) with spacers (9) interposed therebetween, and the external anode terminal (3) and the external cathode terminal (7) are drawn out from the same end surface. A capacitor element (10) 2 consisting of the following can be obtained. When this spacer (9) is impregnated with a driving electrolyte, a heat-fusible resin film (such as ionomer, polyethylene, polyamide, etc.) is formed as shown in Fig. 4.
11) + Aluminum foil (12) + Exterior film such as polyester film, vinylidene chloride, fluorine resin, etc. (13)
The capacitor element (1,0)'4 is housed in a laminate film (1/I) consisting of Heat and pressure ML heat-sealable resin film and adhere to
It is possible to obtain a V rectangular capacitor. Next, examples will be described.

表面ゲ粗面化し９■の化成皮膜ケ生成１〜たＯ、　］闘
厚のアルミ箔”　３　ｍｍ　Ｘ　３　”の角旗状および
該角旗状の一角に１門幅×２ＩＩＩｍ長さの突出部７設
けた寸法に切断し、第１図に示すような陽極箔とする。The surface was roughened and a chemical conversion film of 9 cm was formed. 1 ~ 0,] Thick aluminum foil in the shape of a 3 mm x 3 square flag, and a protrusion of 1 gate width x 2 III m length on one corner of the square flag shape. The anode foil is cut into the dimensions provided in section 7 to obtain an anode foil as shown in FIG.

前記突出部に０．１１１１１１１厚Ｘ　］、　Ｉ１ｍ幅
×適宜な長さの洋白からなる外部陽極端子ヤスポット溶
接して接続し、該接続部にエポキシ樹脂を塗布し硬化さ
せた。An external anode terminal made of nickel silver having a thickness of 0.1111111 mm and an appropriate length was connected to the protruding portion by spot welding, and an epoxy resin was applied to the connected portion and cured.

Ｑ、Ｑ５ｍｍ厚のアルミ箔ゲ粗面化し　第２図に示すよ
うに３朋×６關の角旗状および１朋幅×２ｍｍ長さの突
出部ケ設けた寸法に切断した陰極箔に前記陽極箔に接続
したと同様の洋白からなる外部引出端子火スポット溶接
して接続し、該接続部にエポキシ樹脂を塗布し硬化させ
た。前記陽（命箔の角旗状部分ケＱ、３５ｍｍ厚Ｘ　４
　ｍｙ　Ｘ　８　ｍｒｈ　の寸法からなるコンデンサ紙
ケ２つ折りしたもので被覆し、該コノデンサ紙の上下両
面を前記陰極箔で被覆し外部陽極端子および外部陰極端
子が同一端面から引出されたコンデンサ素子ケ構成し、
該コンデンサ素子に駆動用電解液ケ含浸てろ。したがっ
てコンデンサ素子は４闘ｘ　４ｍｍ　ｘ　０．３　ｍｍ
の寸法ケ有し、これから外部引出端子ケ引出した構造と
なる。該コンデンサ素子ゲアイオノマー樹脂フィルム（
厚さ０、１５１１１１　）＋アルミ箔（厚さ０．　Ｑ２
ｍｍ　）＋ポリエステルフィルム（厚さＯ−０１，３ｍ
ｍ　）　からなる３層ラミネートフィルムのアイオノマ
ー樹脂フィルム上に載せ、該ラミネートフィルムを折り
返して前記第４図のように収容し折り返し面ケ除きコン
デンサ素子の周囲ケ加熱・圧着して前記アイオノマー樹
脂フィルムケ溶着して密閉し不要部７切断して得たコン
デンサの寸法は横５酵×縦５．５　ｍｍ　Ｘ厚さ０．７
闘から外部引出端子が引出されたもので体積は１９、３
　ｆｌ”である。なお得られた定格は６．３　ＷＶ　−
／１．７／ＩＦである。この定格の電解コンデンサ素子
来の巻回形の素子で構成した場合には３　ｍｍφ×５關
看のケースに収容しなげればならず、この体質は３５、
３　ｍｍ”であり、本実施例は従来に比し５５％の体積
しか有せず４５％の体積２減することができる。Q, Q5mm thick aluminum foil is roughened and cut into a square flag shape of 3 x 6 squares and a protrusion of 1 x 2 mm long as shown in Figure 2. External lead terminals made of nickel silver similar to those connected to the foil were connected by spot welding, and epoxy resin was applied to the connection portion and cured. Said positive (square flag-shaped part of life foil Q, 35mm thick x 4
A capacitor element structure in which the capacitor element is covered with a piece of capacitor paper folded in two having dimensions of 8 mrh x 8 mrh, the upper and lower surfaces of the capacitor paper are covered with the cathode foil, and the external anode terminal and the external cathode terminal are drawn out from the same end face. death,
Impregnate the capacitor element with driving electrolyte. Therefore, the capacitor element is 4 mm x 4 mm x 0.3 mm.
It has the dimensions of , and has a structure in which external lead terminals are drawn out. The capacitor element Ge ionomer resin film (
Thickness 0, 151111 ) + aluminum foil (thickness 0. Q2
mm) + polyester film (thickness O-01,3m
The ionomer resin film is placed on the ionomer resin film of the three-layer laminate film consisting of m), the laminate film is folded back and housed as shown in FIG. The dimensions of the capacitor obtained by sealing it up and cutting off 7 unnecessary parts are 5mm wide x 5.5mm long x 0.7mm thick.
The external lead-out terminal is pulled out from the tank, and the volume is 19.3
The obtained rating is 6.3 WV −
/1.7/IF. When an electrolytic capacitor element with this rating is constructed with a wound type element, it must be housed in a case of 3 mmφ x 5 mm, and this constitution is 35 mm.
3 mm", and this embodiment has only 55% of the volume compared to the conventional one, and can reduce the volume by 2, or 45%.

また本発明になる電解コンデンサは陽極箔および陰極箔
の形状を適宜選定するすることによって第５図に示１−
たような偏平角形や偏平丸形などの形状の偏平な電解コ
ンデンサ素子ろことができろ。Further, the electrolytic capacitor according to the present invention can be produced by appropriately selecting the shapes of the anode foil and the cathode foil as shown in FIG.
It is possible to create flat electrolytic capacitor elements with shapes such as flat rectangular or flat round shapes.

従来の巻回形の電解コンデンサではケース直径が３闘φ
が最小であり、また巻回形の素子を圧潰したコンデンサ
素子７ラミネートフイルムケ用いてパッケージしたもの
では定格６．３ＷＶ　−４，７ｐＦで厚さが１．５＋＋
＋＋ｆｆあるが、本発明の場合には厚さケ０．７ｍｍと
することができ従来より大幅に薄形化できる利点がある
。またリード線端子火用いた従来方法では対日時の加熱
圧着によってラミネートフィルムの熱融着性樹脂の逃げ
によるラミネートフィルム中のアルミ箔と陽・陰極端子
との接触による短絡を生じていたが、本発明によれば外
部陽極および陰極端子と陽極箔および陰極箔と７重ね合
せたときの厚さが０．２ｍｍ以下であり、前記熱融着性
樹脂フィルムの厚さＬＬ　３　ｍ＋１１に比し薄いので
熱融着性樹脂が加熱・圧着によって逃げても陽・陰極端
子接触による短絡は発生しない。In conventional wound type electrolytic capacitors, the case diameter is 3 mm.
is the minimum, and the capacitor element packaged using 7-laminate film, which is a rolled element crushed, has a rating of 6.3WV -4.7pF and a thickness of 1.5++.
++ff, but in the case of the present invention, the thickness can be reduced to 0.7 mm, which has the advantage of being much thinner than the conventional one. In addition, in the conventional method using lead wire terminals, short circuits occurred due to contact between the aluminum foil in the laminate film and the positive and negative terminals due to escape of the heat-sealing resin of the laminate film due to heat-pressing when the wire was pressed against the sun. According to the invention, the thickness when the external anode and cathode terminals are overlapped with the anode foil and the cathode foil is 0.2 mm or less, which is thinner than the thickness LL 3 m + 11 of the heat-fusible resin film. Even if the heat-fusible resin escapes due to heating and pressure bonding, short circuits due to contact between the positive and negative terminals will not occur.

さらに上記実施例では外部端子を同一方向から引出した
場合について述べたが、陽・陰極箔に設ける突出部の方
向および外部端子の接続方向化変えろことによってどの
ような方向へも外部端子を引出すこともできる。なお実
施例ではラミネートフィルムにアルミ箔７介挿した３層
ラミネートフィルムについて述べたが、これは駆動用電
解液の透過性ケ考慮したものであり４層となってもよい
しまた使用する。駆動用電解液によって樹脂フィルムの
みの２層〜４層ラミネートフィルムを使用してもよい。Furthermore, although the above embodiment describes the case where the external terminals are pulled out from the same direction, the external terminals can be pulled out in any direction by changing the direction of the protrusion provided on the anode and cathode foils and the connection direction of the external terminals. You can also do it. In the embodiment, a three-layer laminate film in which aluminum foil 7 is inserted is described, but this is done in consideration of the permeability of the driving electrolyte, and four layers may be used. Depending on the driving electrolyte, a 2-layer to 4-layer laminate film including only a resin film may be used.

【図面の簡単な説明】[Brief explanation of the drawing]

図面はいずれも本発明の実施例ケ示し第１図は陽極箔に
外部引出端子ケ接続した状態ケ示す平面図、第２図は陰
極箔に外部陰極端子ケ接続した状態火示す平面図、第３
図はコンデンサ素子の構成ケ説明するための側面図、第
４図はコンデンサ素子７ラミネートフイルムに収容した
状態ケ示す側断面図、第５図は完成した偏平角形電解コ
ンデンサ素子す斜視図である。 （１）・・・・・陽極箔　（２）・・・・・突出部（３
）・・・・・外部陽極端子　（４）・・・・・絶縁物（
５）・・・・・陰極箔　（６）・・・・・突出部（７）
・・・・・外部陰極端子　（８）・・・・・絶縁物＋９
］・・・・・スペーサ　（１，０）・・・・・コンデン
ザ素子（１１）・・・・・熱融着性樹脂フィルム（１２
）・・・・・アルミ箔　（１３）・・・・・外装フィル
ム（１４）・・・・・ラミネートフィルム特許出願人 マルコン電子株式会社 （１１） 第１図　第２図The drawings all show embodiments of the present invention; FIG. 1 is a plan view showing the state in which the external lead terminal is connected to the anode foil; FIG. 2 is a plan view showing the state in which the external cathode terminal is connected to the cathode foil; 3
4 is a side sectional view showing the capacitor element 7 housed in a laminate film, and FIG. 5 is a perspective view of the completed rectangular electrolytic capacitor element. (1)...Anode foil (2)...Protrusion (3
)...External anode terminal (4)...Insulator (
5)...Cathode foil (6)...Protrusion (7)
...External cathode terminal (8) ...Insulator +9
]...Spacer (1,0)...Condenser element (11)...Heat-fusible resin film (12
)...Aluminum foil (13)...Exterior film (14)...Laminate film patent applicant Marcon Electronics Co., Ltd. (11) Figure 1 Figure 2

Claims (1)

【特許請求の範囲】 （１）角旗状の陽極箔および陰極箔に設けた突出部にそ
れぞれ外部端子を接続し該接続部を絶縁物で被覆する工
程と、前記陽極箔をスペーサで挟みさらに該スペーサ上
ケ２つ折りした前記陰極箔で挟み込んでコンデンサ素子
を構成する工程と、該コンデンサ素子に駆動用電解液化
含浸する工程と、該工程ののち前記コンデンサ素子をラ
ミネートフィルム中に収容し該ラミネートフィルムを接
着する工程とを具備した電解コンデンサの製造方法。 （２）外部陽極端子および外部陰極端子が洋白、ニッケ
ル、鉄、銅などのはんだ付は可能な金属薄板または箔か
らなることを特徴とする特許請求の範囲第（１）項記載
の電解コンデンサの製造方法。 （３）絶縁物が樹脂、ガラスなどケ塗布−硬化させて構
成されること火特徴とする特許請求の範囲第ｒ　１　） （１）項または第（２）項に記載の電解コンデンサの製
造方法。 （４）ラミネートフィルムが熱融着性樹脂フィルムと外
装フィルムとのラミネートからなり熱融着性ンデンサの
製造方法。 （５）熱融着性樹脂フィルムがアイオノマー、ポリエチ
レン、ポリアミドの中の１種であり、外装フィルムがポ
リエステル、塩化ビニリチン、弗素系樹脂の中の１種で
あること欠特徴とする特許請求の範囲第（４）項に記載
の電解コンデンサの製造方法。 （６）ラミネートフィルムが熱融着性フィルムと外装フ
ィルムとの間にアルミ箔を介挿したものからなることケ
特徴とする特許請求の範囲第（１）項〜第（５）項のい
ずれかに記載の電解コンデンサの製造方法。[Scope of Claims] (1) Connecting external terminals to protrusions provided on the square-flag-shaped anode foil and cathode foil, respectively, and covering the connection portions with an insulating material; sandwiching the anode foil with spacers; A step of sandwiching the spacer top with the cathode foil folded in two to form a capacitor element, a step of impregnating the capacitor element with a driving electrolyte, and after the step, accommodating the capacitor element in a laminate film and forming the laminate. A method for manufacturing an electrolytic capacitor, comprising the step of bonding a film. (2) The electrolytic capacitor according to claim (1), wherein the external anode terminal and the external cathode terminal are made of a solderable metal thin plate or foil made of nickel silver, nickel, iron, copper, etc. manufacturing method. (3) The method for manufacturing an electrolytic capacitor according to claim 1) (1) or (2), characterized in that the insulator is formed by coating and curing resin, glass, etc. . (4) A method for producing a heat-fusible capacitor in which the laminate film is a laminate of a heat-fusible resin film and an exterior film. (5) Claims lacking in that the heat-fusible resin film is one of ionomers, polyethylenes, and polyamides, and the exterior film is one of polyesters, vinylitine chloride, and fluororesins. The method for manufacturing an electrolytic capacitor according to item (4). (6) Any one of claims (1) to (5), characterized in that the laminate film is made of aluminum foil interposed between a heat-fusible film and an exterior film. The method for manufacturing an electrolytic capacitor described in .