JPH01291419A - Manufacture of capacitor - Google Patents

Abstract

PURPOSE:To sufficiently fill an impregnating solution in a capacitor element, and to improve electric characteristics such as tan delta or the like by applying in advance the solution substantially to the lateral center of a film or the like for an electrode before or during winding, forming the element, and then further impregnating the whole capacitor with the solution. CONSTITUTION:Films for electrodes formed of aluminum anode electrode foil 1 and anode foil 2 are wound together with a separator 3 made of capacitor paper on a winding core 4. Electrolyte 6 is dropped from a nozzle 5 substantially to the center of the separator 3 to adhere thereto simultaneously upon winding. Then, after the films and the separator 3 are wound to form a capacitor element, the whole element is dipped in the electrolyte to impregnate it with the electrolyte. Thus, the capacitor can be sufficiently impregnated with the impregnating solution, thereby improving electric characteristics such as tan delta.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は含浸型のコンデンサの製造方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for manufacturing an impregnated capacitor.

（従来の技術） 通常、アルミ電解コンデンサは、アルミ７Ｆ＝　４！Ｉ
！　Ｐにセパレータを積層して巻回しコンデンサ素子を
形成した後、このコンデンサ素子に電解液を含浸し￥Ｊ
造されている。(Prior art) Usually, aluminum electrolytic capacitors have aluminum 7F = 4! I
! After laminating a separator on P and forming a wound capacitor element, this capacitor element is impregnated with electrolyte.
It is built.

また、金属化紙コンデンサやプラスチックフィルムコン
デンサは、金属化紙や金属化フィルムを単独であるいは
他の誘電体フィルムとともに巻回し、コンデンサ素子を
形成後、電気絶縁油を含浸し製造されている。Further, metallized paper capacitors and plastic film capacitors are manufactured by winding metallized paper or metallized film alone or together with other dielectric films to form a capacitor element, and then impregnating the capacitor with electrical insulating oil.

（光明が解決しようとする課題） しかし、アルミ電解コンデンサの場合、電極箔はセパレ
ータに比べて電解液の浸透性や透過性が著しく低い。す
なわち巻回されたコンデンサ素子では、主にその素子の
上面及び底面から電解液が浸透し、コンデンサ素子側面
からはほとんど浸透されない。従って、コンデンサ素子
の中央には含浸液が含浸され難い。このため、ｊａｎδ
等の電気的特性を向上し難い欠点がある。この欠点はセ
パレータの密度が高いほど顕著になる。(The problem Komei is trying to solve) However, in the case of aluminum electrolytic capacitors, the electrode foil has significantly lower electrolyte permeability and permeability than the separator. That is, in a wound capacitor element, the electrolyte mainly permeates through the top and bottom surfaces of the element, and hardly permeates through the side surfaces of the capacitor element. Therefore, the center of the capacitor element is difficult to be impregnated with the impregnating liquid. For this reason, janδ
It has the disadvantage that it is difficult to improve the electrical characteristics such as. This drawback becomes more pronounced as the density of the separator increases.

また、金属化紙コンデンサやプラスチックフィルムコン
デンサについても同様に、コンデンサ素子の中央部の含
浸性が劣り、特性を向上し難い欠点があった。Similarly, metallized paper capacitors and plastic film capacitors also have the disadvantage of poor impregnation properties in the center of the capacitor element, making it difficult to improve their characteristics.

本発明の目的は、以上の欠点を改良し、含浸液をコンデ
ンサに十分に含浸でき、ｊａｎδ等の電気的特性を向上
しつるコンデンサの製造方法を提供するものである。An object of the present invention is to improve the above-mentioned drawbacks, to provide a method for manufacturing a capacitor which can sufficiently impregnate a capacitor with an impregnating liquid and improve electrical characteristics such as jan δ.

（課題を解決するための手段） 本発明は、上記の目的を達成するために、電極用フィル
ム単独あるいはこれにセパレータまたは誘電体フィルム
を積層して巻回しコンデンサ素子とし、含浸液を含浸し
たコンデンサの製造方法において、 ｉ）電極用フィルム若しくはセパレータまたは誘電体フ
ィルムの少なくともどちらか一方の巾方向のほぼ中央に
、巻回前あるいは巻回中に含浸液を付着する工程と、 ｉｉ）巻回後にコンデンサ素子に含浸液を含浸する工程
と、 を順次行なうことを特徴とするコンデンサの製造方法を
提供するものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a capacitor element in which an electrode film is used alone or a separator or a dielectric film is laminated thereon to form a wound capacitor element, which is impregnated with an impregnating liquid. In the manufacturing method, i) applying an impregnating liquid to the approximate center in the width direction of at least one of the electrode film, the separator, or the dielectric film before or during the winding process, and ii) after the winding process. The present invention provides a method for manufacturing a capacitor, which comprises sequentially performing the following steps: impregnating a capacitor element with an impregnating liquid;

（作用） 含浸液を予じめ、電極用フィルム等の特に含浸され難い
巾方向のほぼ中央に付着し、その後、コンデンサ素子を
形成しているため、含浸液の作用をコンデンサ素子全体
に及ぼすことができる。そのため、コンデンサの特性を
向上できる。(Function) Since the impregnating liquid is applied in advance to approximately the center of the electrode film, etc. in the width direction where it is difficult to be impregnated, and then forming the capacitor element, the effect of the impregnating liquid is not exerted on the entire capacitor element. I can do it. Therefore, the characteristics of the capacitor can be improved.

（実施例） 以下、本発明を実施例に基づいて説明する。(Example) Hereinafter, the present invention will be explained based on examples.

先ず、第１図に示す通り、アルミの陽極電極箔１と陰極
箔２とからなる電極用フィルムを、コンデンサ紙からな
るセパレータ３とともに巻芯４に巻き付ける。そして巻
回と同時に、セパレータ３のほぼ中央にノズル５から電
解液６を滴下して付着する。First, as shown in FIG. 1, an electrode film consisting of an aluminum anode electrode foil 1 and a cathode foil 2 is wound around a winding core 4 together with a separator 3 made of capacitor paper. Simultaneously with the winding, the electrolytic solution 6 is dripped from the nozzle 5 and adhered to approximately the center of the separator 3.

次に、電極用フィルムとセパレータ３とを巻回してコン
デンサ素子を形成後、コンデンサ素子全体を電解液中に
浸漬して電解液を含浸する。Next, the electrode film and the separator 3 are wound to form a capacitor element, and then the entire capacitor element is immersed in an electrolytic solution to be impregnated with the electrolytic solution.

なお、上記実施例においては、セパレータ３に電解液６
を付着するのにノズル５からの滴下により行なったが、
他にロール塗布機などにより強制的に付着したり、ノズ
ルから吹き付ける方法によってもよい。In addition, in the above embodiment, the electrolyte 6 is placed in the separator 3.
was applied by dripping from nozzle 5,
Alternatively, it may be forcibly attached using a roll coater or the like, or it may be sprayed from a nozzle.

また、セパレータ３だけではなく、陽極箔１と陰極箔２
の片一方あるいは両方の巾方向の中央に電解液を付着し
てもよい。In addition, not only the separator 3 but also the anode foil 1 and the cathode foil 2
The electrolytic solution may be attached to the center of one or both of the width directions.

次に、上記実施例と従来のアルミ電解コンデンサについ
て、ｔａｎδの比較をする。試料の定格は４５０Ｖ、５
６００μＦとする。Next, tan δ will be compared between the above example and a conventional aluminum electrolytic capacitor. The sample rating is 450V, 5
It is set to 600μF.

第２図は、試料を放置する雰囲気の温度を変えた場合の
ｔａｎδの変化のグラフを示している。本発明Ａによれ
ば、ｔａｎδが全体的に従来例Ｂのほぼ１／２になって
いる。FIG. 2 shows a graph of changes in tan δ when the temperature of the atmosphere in which the sample is left is changed. According to the present invention A, tan δ is approximately 1/2 that of the conventional example B as a whole.

第３図は、試料を温度８５℃の雰囲気中に放置し、直流
電圧４５０Ｖを加え、リップル電流１０Ａを流して高温
リップル負荷試験を行なった場合の、試験時間に対する
ｔａｎδの変化のグラフを示している。本発明Ａは、２
０００Ｈｒまで、従来例Ｂのほぼ１／２のｔａｎδを示
している。Figure 3 shows a graph of changes in tan δ versus test time when a high temperature ripple load test was performed by leaving the sample in an atmosphere at a temperature of 85°C, applying a DC voltage of 450 V, and flowing a ripple current of 10 A. There is. The present invention A has 2
Until 000 hours, the tan δ is approximately 1/2 that of the conventional example B.

なお、上記実施例では、アルミ電解コンデンサについて
述べたが、金属化紙コンデンサやプラスチックフィルム
コンデンサ等の他の含浸型のコンデンサについても同様
に採用しつる技術である。In the above embodiments, an aluminum electrolytic capacitor was described, but the technology can be similarly applied to other impregnated capacitors such as metallized paper capacitors and plastic film capacitors.

（発明の効果） 以上の通り、本発明は、巻回前または巻回中に予じめ電
極用フィルム等の巾方向のほぼ中央に含゛浸液を付着し
、コンデンサ素子を形成後にざらに含浸液を全体に含浸
している。そのため、本発明によれば、含浸液がコンデ
ンサ素子内に十分に入り、ｊａｎδ等の電気的特性を向
上しつるコンデンサの製造方法が得られる。(Effects of the Invention) As described above, the present invention applies an impregnating liquid to approximately the center of the width of an electrode film, etc. before or during winding, and then roughly coats the capacitor element after forming it. The entire surface is impregnated with impregnating liquid. Therefore, according to the present invention, it is possible to obtain a method for manufacturing a capacitor in which the impregnating liquid sufficiently enters the capacitor element and improves electrical characteristics such as jan δ.

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

第１図は本発明の製造状態の斜視図、第２図は温度変化
に対するｊａｎδのグラフ、第３図は高温リップル負荷
試験に対するｔａｎδのグラフを示す。 １・・・陽極電極箔、　２・・・陰極箔、３・・・セパ
レータ、　６・・・電解液。 αフFIG. 1 is a perspective view of the manufacturing state of the present invention, FIG. 2 is a graph of jan δ with respect to temperature change, and FIG. 3 is a graph of tan δ with respect to a high temperature ripple load test. DESCRIPTION OF SYMBOLS 1... Anode electrode foil, 2... Cathode foil, 3... Separator, 6... Electrolyte solution. αF

Claims (1)

【特許請求の範囲】[Claims] （１）電極用フィルム単独あるいはセパレータまたは誘
電体フィルムを積層し巻回してコンデンサ素子とし、含
浸液を含浸したコンデンサの製造方法において、 ｉ）電極用フィルム若しくはセパレータまたは誘電体フ
ィルムの少なくともどちらか一 方の巾方向のほぼ中央に、巻回前あるいは 巻回中に含浸液を付着する工程と、 ｉｉ）巻回後にコンデンサ素子に含浸液を含浸する工程
と、 を順次行なうことを特徴とするコンデンサの製造方法。(1) In a method for manufacturing a capacitor in which a capacitor element is made by forming an electrode film alone or by laminating and winding a separator or dielectric film and impregnating it with an impregnating liquid, i) at least one of the electrode film or separator or the dielectric film; ii) applying an impregnating liquid to approximately the center in the width direction of the capacitor element before or during winding; and ii) impregnating the capacitor element with the impregnating liquid after winding. Production method.