JP3935597B2 - Electrolytic capacitor - Google Patents
Electrolytic capacitor Download PDFInfo
- Publication number
- JP3935597B2 JP3935597B2 JP08203398A JP8203398A JP3935597B2 JP 3935597 B2 JP3935597 B2 JP 3935597B2 JP 08203398 A JP08203398 A JP 08203398A JP 8203398 A JP8203398 A JP 8203398A JP 3935597 B2 JP3935597 B2 JP 3935597B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- capacitor
- capacitor element
- lead
- winding
- Prior art date
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- Expired - Fee Related
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- 239000003990 capacitor Substances 0.000 title claims description 47
- 239000011888 foil Substances 0.000 claims description 26
- 238000004804 winding Methods 0.000 description 18
- 230000020169 heat generation Effects 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は電解コンデンサの電極引き出しリードタブの接続方法に関するものである。
【０００２】
【従来の技術】
電解コンデンサは、ＡＶ機器や産業用機器において電源平滑用やカップリング用などに広く使用されている。例として、ＪＩＳ規格のＣＥ３３形のアルミ電解コンデンサは、図１のように有底円筒のアルミニウム製の外装ケース２内に、コンデンサ素子３を収納してなり、外装ケース２の開口した封止部分は封口体４により封止されている。コンデンサ素子３は、エッチング、化成された陽極箔と陰極箔に電極引き出しリードタブを加締接続し、セパレータを介して巻回した上、テープ５で固定し、電解液を含浸してなる。電極引き出しリードタブは封口体具備された外部引出し電極端子に加締接続される。コンデンサ素子３と外装ケース２の間には、コンデンサ素子３を固定する目的で固定材６が充填されている。
【０００３】
前記コンデンサにおいて、陽極箔、陰極箔に加締される電極引出しリードタブの位置は、図２に示す様に陽極箔及び陰極箔の全長を電極引出しリードタブ枚数分に均等分割し、その分割部分の中央付近に加締されていた。
【０００４】
【発明が解決しようとする課題】
従来技術による電解コンデンサは、使用中ある程度の発熱を伴う。小形のコンデンサの場合、問題は少ないが、大形のコンデンサの場合、その発熱による温度上昇の問題が顕在化してくる。過度に温度が上昇するとコンデンサの機能が低下したり、寿命が短縮してしまう問題がある。
【０００５】
コンデンサの発熱はコンデンサ内部のワット損失により、コンデンサ素子全体が発熱するが、コンデンサ素子は巻回構造のため、中心付近に近いほど温度上昇が高く、外側に近いほど温度上昇が低いといった傾向が見られる。
【０００６】
上記問題を解決するため、巻芯にヒートパイプを用いた構造が提案されている。ヒートパイプにより、巻芯部の熱が放熱され、温度上昇を抑える効果がある。しかし、コンデンサ素子の外側の放熱性は変わらないので、外側の温度上昇を抑えきれないという問題があった。
【０００７】
【課題を解決するための手段】
本発明は、電極引出しリードタブ間隔を巻回体の外側に向かうほど狭くすることで、外側に向かうほどタブ１枚当たりの抵抗値を下げることができ、コンデンサ素子外側付近の発熱を少なくする構造を備えるものである。
【０００８】
すなわち、ヒートパイプを巻芯とし、複数の引出しリードタブを固着した陽極箔と陰極箔とをセパレータを介して巻回した素子からなる電解コンデンサにおいて、上記引出しリードタブの間隔が巻芯部に向かうほど広くなることを特徴とする電解コンデンサである。
【０００９】
【発明の実施の形態】
本発明のコンデンサは、ヒートパイプを設けることにより、コンデンサ素子の巻回部の外側よりも放熱性の良い巻回部中心付近の発熱を増やすことで、従来技術によるコンデンサよりも放熱性を良くし、コンデンサ素子全体の温度上昇を抑え、コンデンサを長寿命化することができる。
【００１０】
【実施例】
以下、本発明の実施例を説明する。コンデンサ素子は、ヒートパイプを巻芯とし、陽極箔と陰極箔に電極引出しリードタブを加締し、セパレータを介して巻回した上、テープ５で固定し電解液を含浸して構成されている。
【００１１】
本発明によるコンデンサ素子は、図４に示すように、陽極箔３１及び陰極箔３２の巻回部外側に向かうほど分割部分が狭くなり、その分割部分の中央に電極引出しリードタブ３３が加締されている。
【００１２】
従来のコンデンサ素子は図２に示すように、引出しリードタブ１３が、陽極箔１１及び陰極箔１２の全長を均等分割するように加締されている。
【００１３】
本発明のコンデンサ素子に用いる電極引出しリードタブの枚数は、多ければ多いほどその効果を発揮することができる。
【００１４】
本発明の電解コンデンサと従来品の電解コンデンサを定格：４００Ｖ−２００００μＦ、サイズ：φ９０×２３０Ｌのもので比較した。コンデンサ素子の巻回部中心から巻回部外側にかけての発熱量−放熱量−温度上昇の関係は、本発明：図５、従来例：図３の概念図のようになり、表１及び図６に示すように、本発明の電解コンデンサにおいては巻回部外側の巻回部中心に対する温度比率が１．０６から１．０７となり、巻回部のリプル電流による発熱が均一化され、巻回部全体の温度上昇を低減することができるのに対し、従来品においては巻回部外側の巻回部中心に対する温度比率が１．２８から１．２９であって、発熱が均一化されず、巻回部全体の温度上昇が抑えられない。
【００１５】
【表１】
【発明の効果】
本発明による陽極箔及び陰極箔に接続された電極引出しリードタブ間隔が巻芯部に向かうほど広くなるコンデンサ素子を用いたヒートパイプ式電解コンデンサは、従来技術によるヒートパイプ式電解コンデンサよりも放熱性に優れているため、発熱による特性劣化が少なくなるので、製品を容易かつ安価に長寿命化することができる。
【図面の簡単な説明】
【図１】従来技術による電解コンデンサの一実施例の外形図。
【図２】従来技術による電解コンデンサ素子の陽極箔及び陰極箔の展開図。
【図３】従来技術による電解コンデンサ素子の発熱量と放熱量との概念図。
【図４】本発明によるヒートパイプを巻芯に用いる場合の、電解コンデンサ素子の陽極箔及び陰極箔の展開図
【図５】本発明による電解コンデンサ素子の発熱量と放熱量との概念図。
【図６】ヒートパイプを巻芯に用い、電極引出しリードタブ数６枚の電解コンデンサにおいて、リプル電流を１４０Ａ印加した際の従来品と本発明品の温度上昇の比較図。
【符号の説明】
１ 電解コンデンサ
２ 外装ケース
３ コンデンサ素子
４ 封口体
５ テープ
６ 固定剤
７ 製品固定バンド
８ 防爆弁
９ 電極引出しリードタブ
１０ 電極端子
１１ 陽極箔
１２ 陰極箔
１３ 電極引出しリードタブ
３１ 陽極箔
３２ 陰極箔
３３ 電極引出しリードタブ
４１ 放熱フィン
４２ ヒートパイプ構造を有する巻芯[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for connecting an electrode lead lead tab of an electrolytic capacitor.
[0002]
[Prior art]
Electrolytic capacitors are widely used for power supply smoothing and coupling in AV equipment and industrial equipment. As an example, a CE33 type aluminum electrolytic capacitor of JIS standard has a capacitor element 3 housed in a bottomed cylindrical aluminum
[0003]
In the capacitor, the positions of the electrode lead tabs to be crimped to the anode foil and the cathode foil are as follows. As shown in FIG. 2, the total length of the anode foil and the cathode foil is equally divided into the number of the electrode lead tabs and the center of the divided portion It was crimped in the vicinity.
[0004]
[Problems to be solved by the invention]
Electrolytic capacitors according to the prior art are accompanied by a certain amount of heat during use. In the case of a small capacitor, there are few problems, but in the case of a large capacitor, the problem of temperature rise due to heat generation becomes obvious. If the temperature rises excessively, there is a problem that the function of the capacitor is lowered or the life is shortened.
[0005]
Capacitor heat is generated by the watt loss inside the capacitor, but the entire capacitor element generates heat.However, because the capacitor element has a winding structure, the temperature rises closer to the center and tends to be lower near the outside. It is done.
[0006]
In order to solve the above problem, a structure using a heat pipe for the core has been proposed. The heat pipe radiates the heat of the core part and has the effect of suppressing the temperature rise. However, since the heat dissipation on the outside of the capacitor element does not change, there is a problem that the temperature rise on the outside cannot be suppressed.
[0007]
[Means for Solving the Problems]
The present invention has a structure in which the electrode lead lead tab interval is narrowed toward the outside of the wound body, the resistance value per tab can be lowered toward the outside, and the heat generation near the outside of the capacitor element is reduced. It is to be prepared.
[0008]
That is, in an electrolytic capacitor composed of an element in which a heat pipe is used as a winding core, and an anode foil and a cathode foil each having a plurality of drawing lead tabs fixed thereto are wound through a separator, the distance between the drawing lead tabs increases toward the core portion. The electrolytic capacitor is characterized in that.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
By providing a heat pipe, the capacitor of the present invention increases the heat generation near the center of the winding part with better heat dissipation than the outside of the winding part of the capacitor element, thereby improving the heat dissipation compared with the capacitor according to the prior art. In addition, the temperature rise of the entire capacitor element can be suppressed and the life of the capacitor can be extended.
[0010]
【Example】
Examples of the present invention will be described below. The capacitor element is constituted by using a heat pipe as a winding core, crimping an electrode lead lead tab between the anode foil and the cathode foil, winding the separator through a separator, fixing with a tape 5 and impregnating with an electrolytic solution.
[0011]
In the capacitor element according to the present invention, as shown in FIG. 4, the divided portion becomes narrower toward the outside of the wound portion of the anode foil 31 and the cathode foil 32, and the electrode lead-out
[0012]
In the conventional capacitor element, as shown in FIG. 2, the lead lead tab 13 is crimped so as to equally divide the entire length of the
[0013]
As the number of electrode lead lead tabs used in the capacitor element of the present invention increases, the effect can be exhibited.
[0014]
The electrolytic capacitor of the present invention was compared with a conventional electrolytic capacitor having a rating of 400V-20000 μF and a size of φ90 × 230L. The relationship between the heat generation amount-heat radiation amount-temperature rise from the center of the winding portion of the capacitor element to the outside of the winding portion is as shown in the conceptual diagram of the present invention: FIG. 5 and the conventional example: FIG. As shown in FIG. 4, in the electrolytic capacitor of the present invention, the temperature ratio of the winding portion outside the winding portion to the center of the winding portion is 1.06 to 1.07, heat generation due to the ripple current of the winding portion is made uniform, and the winding portion While the overall temperature rise can be reduced, in the conventional product, the temperature ratio with respect to the center of the winding part outside the winding part is 1.28 to 1.29. The temperature rise of the whole turning part cannot be suppressed.
[0015]
[Table 1]
【The invention's effect】
The heat pipe type electrolytic capacitor using the capacitor element in which the distance between the electrode lead lead tabs connected to the anode foil and the cathode foil according to the present invention becomes wider as it goes to the core portion is more radiant than the heat pipe type electrolytic capacitor according to the prior art. Since it is excellent, the characteristic deterioration due to heat generation is reduced, so that the product can be extended easily and inexpensively.
[Brief description of the drawings]
FIG. 1 is an external view of an embodiment of an electrolytic capacitor according to the prior art.
FIG. 2 is a development view of an anode foil and a cathode foil of an electrolytic capacitor element according to the prior art.
FIG. 3 is a conceptual diagram of a heat generation amount and a heat dissipation amount of an electrolytic capacitor element according to a conventional technique.
FIG. 4 is a development view of an anode foil and a cathode foil of an electrolytic capacitor element when a heat pipe according to the present invention is used as a winding core. FIG. 5 is a conceptual diagram of heat generation and heat dissipation of the electrolytic capacitor element according to the present invention.
FIG. 6 is a comparison diagram of temperature rise between a conventional product and a product of the present invention when a ripple current is applied at 140 A in an electrolytic capacitor using a heat pipe as a winding core and having six electrode lead tabs.
[Explanation of symbols]
DESCRIPTION OF
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08203398A JP3935597B2 (en) | 1998-03-27 | 1998-03-27 | Electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08203398A JP3935597B2 (en) | 1998-03-27 | 1998-03-27 | Electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11283883A JPH11283883A (en) | 1999-10-15 |
| JP3935597B2 true JP3935597B2 (en) | 2007-06-27 |
Family
ID=13763227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08203398A Expired - Fee Related JP3935597B2 (en) | 1998-03-27 | 1998-03-27 | Electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3935597B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4557001B2 (en) | 2007-12-28 | 2010-10-06 | Ｔｄｋ株式会社 | Electrode for electrochemical device and electrochemical device |
-
1998
- 1998-03-27 JP JP08203398A patent/JP3935597B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11283883A (en) | 1999-10-15 |
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