JPH03248522A - Flat aluminum electrolytic capacitor - Google Patents
Flat aluminum electrolytic capacitorInfo
- Publication number
- JPH03248522A JPH03248522A JP4622190A JP4622190A JPH03248522A JP H03248522 A JPH03248522 A JP H03248522A JP 4622190 A JP4622190 A JP 4622190A JP 4622190 A JP4622190 A JP 4622190A JP H03248522 A JPH03248522 A JP H03248522A
- Authority
- JP
- Japan
- Prior art keywords
- metal case
- flat
- aluminum electrolytic
- lead terminal
- electrolytic 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 33
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000011888 foil Substances 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 4
- 238000005476 soldering Methods 0.000 abstract description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000004804 winding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3421—Leaded components
Landscapes
- Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、偏平形をなす有底筒状の金属ケース内にコン
デンサ素子を収納した偏平形アルミ電解コンデンサに関
するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flat aluminum electrolytic capacitor in which a capacitor element is housed in a flat bottomed cylindrical metal case.
従来の技術
従来のこの種の偏平形アルミ電解コンデンサは、第３図
及び第４図に示すような構成となっていた。すなわち、
コンデンサ素子１を偏平形をなす有底筒状のアルミニウ
ムよりなる金属ケース２内に収納し、そして金属ケース
２の開放端に弾性封口体３を圧入して気密性を保つとと
もに、前記金属ケース２の開放端の先端部をカーリング
加工することにより、弾性封口体３及びコンデンサ素子
１を金属ケース２内に固定していた。なお、４．５は陽
極リード端子及び陰極リード端子である。2. Description of the Related Art Conventional flat aluminum electrolytic capacitors of this type have a structure as shown in FIGS. 3 and 4. That is,
The capacitor element 1 is housed in a flat bottomed cylindrical metal case 2 made of aluminum, and an elastic sealing body 3 is press-fitted into the open end of the metal case 2 to maintain airtightness. The elastic sealing body 3 and the capacitor element 1 were fixed in the metal case 2 by curling the tip of the open end. Note that 4.5 is an anode lead terminal and a cathode lead terminal.
発明が解決しようとする課題
しかしながら、上記した従来の構成における偏平形アル
ミ電解コンデンサにおいては、弾性封口体３を金属ケー
ス２の開放端に圧入することによってのみ気密性を保持
しているため、例えば、電源回路等のプリント基板にこ
の偏平形アルミ電解コンデンサを実装して使用した場合
、周囲部品の発熱やリップル電流による自己発熱等の影
響によるコンデンサ素子１内の温度上昇によって、内部
の電解液が高温になってガス化し、金属ケース２の内圧
を上昇させるものである。Problems to be Solved by the Invention However, in the flat aluminum electrolytic capacitor with the conventional configuration described above, airtightness is maintained only by press-fitting the elastic sealing body 3 into the open end of the metal case 2. When this flat aluminum electrolytic capacitor is mounted and used on a printed circuit board such as a power supply circuit, the internal electrolyte may leak due to the temperature rise inside the capacitor element 1 due to heat generation from surrounding components or self-heating due to ripple current. It becomes high temperature and gasifies, increasing the internal pressure of the metal case 2.
第５図は従来の偏平形アルミ電解コンデンサの側断面図
を示したものであるが、内部のガス圧が増加した場合、
金属ケース２はそのガス圧により、高さ方向に変形し、
Ｈｌ、Ｈ２，Ｈ３の高さ寸法がふくれてしまう。この場
合、Ｈｌ、Ｈ３の寸法ふくれは、金属ケース２の底部あ
るいは封口部で固定されているため、それほど大きくな
いが、Ｈ２の寸法ふくれは、固定箇所がないため、一番
大きくなってしまうもので、これはコンデンサにとって
問題となる。なぜならば、通常、偏平形アルミ電解コン
デンサは、平面部がプリント基板に接するように設置さ
れているため、金属ケース２が変形し、Ｈ２の寸法ふく
れが大きくなると、コンデンサが上方に押され、その結
果、リード端子とプリント基板との間の半田付は部にス
トレスがかかり、半田にクラックが入ったり、半田が割
れたりするという問題点があった。Figure 5 shows a side sectional view of a conventional flat aluminum electrolytic capacitor, and when the internal gas pressure increases,
The metal case 2 is deformed in the height direction due to the gas pressure,
The height dimensions of Hl, H2, and H3 bulge. In this case, the dimensional bulges of Hl and H3 are not so large because they are fixed at the bottom or sealing part of the metal case 2, but the dimensional bulge of H2 is the largest because there is no fixed part. This poses a problem for capacitors. This is because flat aluminum electrolytic capacitors are normally installed so that the flat part is in contact with the printed circuit board, so if the metal case 2 deforms and the dimensional bulge of H2 increases, the capacitor will be pushed upward and its As a result, stress is applied to the soldering between the lead terminal and the printed circuit board, resulting in problems such as cracks in the solder and breakage of the solder.
本発明はこのような従来の問題点を解決するもので、内
圧の上昇による金属ケースの変形を防止することを目的
とするものである。The present invention solves these conventional problems and aims to prevent the metal case from deforming due to an increase in internal pressure.
課題を解決するための手段
上記目的を達成するために本発明は、陽極箔及び陰極箔
をセパレータとともに巻回し、かつ電解液を含浸させて
なるコンデンサ素子と、このコンデンサ素子を収納する
偏平形をなす有底筒状の金属ケースと、この金属ケース
の開放端の封止を行う封口体と、前記コンデンサ素子よ
り導出された陽極リード端子及び陰極リード端子とを有
し、前記偏平形をなす有底筒状の金属ケースの平面部に
、この平面部の中心部を通り、かつ封止面と平行、ある
いは垂直方向に溝部の加工を施したものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a capacitor element formed by winding an anode foil and a cathode foil together with a separator and impregnating it with an electrolyte, and a flat shape housing this capacitor element. The flat shaped metal case has a cylindrical metal case with a bottom, a sealing body for sealing the open end of the metal case, and an anode lead terminal and a cathode lead terminal led out from the capacitor element. A groove is machined in the flat part of the bottom cylindrical metal case, passing through the center of the flat part and parallel to or perpendicular to the sealing surface.
作用
上記構成の偏平形アルミ電解コンデンサによれば、偏平
形をなす有底筒状の金属ケースの平面部に、この平面部
の中心部を通り、かつ封止面と平行、あるいは垂直方向
に溝部の加工を施しているため、この偏平形アルミ電解
コンデンサをプリント基板に面実装した場合における高
さ方向への変形応力に対しても、この溝部の加工により
変形しにくくなり、その結果、金属ケースのほぼ中央部
の高さの変形が抑えられるため、金属ケースの変形によ
るリード端子部の半田はずれ等は生じないものである。According to the flat aluminum electrolytic capacitor having the above structure, a groove is formed in the flat part of the flat bottomed cylindrical metal case, passing through the center of the flat part and parallel to or perpendicular to the sealing surface. Because the flat aluminum electrolytic capacitor is surface-mounted on a printed circuit board, the processing of this groove makes it difficult to deform due to deformation stress in the height direction, and as a result, the metal case Since deformation of the height of the approximately central portion of the metal case is suppressed, solder dislocation of the lead terminal portion due to deformation of the metal case does not occur.
実施例
以下、本発明の一実施例を第１図及び第２図に基づいて
説明する。第１図及び第２図において、１１は偏平形を
なす有底筒状のアルミニウムよりなる金属ケースで、こ
の金属ケース１１は上部及び下部に平面部１１ａを有し
、かつ側面部に曲面部１１ｂを有している。またこの金
属ケース１１の内部には、陽極箔及び陰極箔をセパレー
タとともに巻回し、かつ電解液を含浸させてなるコンデ
ンサ素子（図示せず）を収納している。EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. In FIGS. 1 and 2, reference numeral 11 denotes a metal case made of aluminum and having a flat bottomed cylindrical shape. have. Further, inside the metal case 11, a capacitor element (not shown) is housed, which is formed by winding an anode foil and a cathode foil together with a separator and impregnating the capacitor element with an electrolyte.
前記コンデンサ素子から導出された陽極リード端子１２
．陰極リード端子１３は、金属ケース１１の開放端に配
設された弾性封口体１４を通して外部に引き出され、そ
して前記金属ケース１１の開放端の先端部をカーリング
加工することにより、封止している。Anode lead terminal 12 led out from the capacitor element
．． The cathode lead terminal 13 is drawn out through an elastic sealing member 14 disposed at the open end of the metal case 11, and is sealed by curling the tip of the open end of the metal case 11. .
また偏平形をなす金属ケース１１の上部と下部の平面部
１１ａには、この平面部１１ａの中心部を通り、かつ封
止面と垂直方向に溝部１５の加工を施している（第１図
の実施例）。そしてまた第２図は、偏平形をなす金属ケ
ース１１の上部と下部の平面部１１ａに、この平面部１
１ａの中心部を通り、かつ封止面に平行に第１図と同様
な溝部１６の加工を施した他の実施例を示したものであ
る。In addition, grooves 15 are formed in the upper and lower flat parts 11a of the flat metal case 11, passing through the center of the flat parts 11a and extending perpendicularly to the sealing surface (see FIG. 1). Example). FIG. 2 also shows that the flat parts 1 are attached to the upper and lower flat parts 11a of the flat metal case 11.
This figure shows another embodiment in which a groove 16 similar to that in FIG. 1 is formed passing through the center of 1a and parallel to the sealing surface.
また第１図及び第２図における陽極リード端子１２と陰
極リード端子１３の先端部は、ランド部への半田付けに
よるプリント基板への面実装が可能となるように、折り
曲げ加工している。Further, the tips of the anode lead terminal 12 and the cathode lead terminal 13 in FIGS. 1 and 2 are bent to enable surface mounting on a printed circuit board by soldering to a land.
上記した溝部１５．１６の加工を施すことにより、金属
ケース１１の平面部１１ａの中心部付近は高さ方向に変
形しに（くなるため、第５図で示した金属ケース１１の
ほぼ中央部におけるＨ２の高さの変形が抑えられるもの
である。By processing the grooves 15 and 16 described above, the vicinity of the center of the flat part 11a of the metal case 11 is not deformed in the height direction, so that approximately the center of the metal case 11 shown in FIG. This suppresses the deformation of the height of H2 in .
発明の効果
上記実施例の説明から明らかなように、本発明の偏平形
アルミ電解コンデンサは、偏平形をなす有底筒状の金属
ケースの平面部に、この平面部の中心部を通り、かつ封
止面と平行、あるいは垂直方向に溝部の加工を施してい
るため、この偏平形アルミ電解コンデンサをプリント基
板に面実装した場合における高さ方向への変形応力に対
しても、この溝部の加工により変形しにくくなり、その
結果、金属ケースのほぼ中央部の高さの変形が抑えられ
るため、金属ケースの変形によるリード端子部の半田は
ずれ等を確実に防止できるものである。Effects of the Invention As is clear from the description of the embodiments above, the flat aluminum electrolytic capacitor of the present invention has a flat bottomed cylindrical metal case with a flat surface that passes through the center of the flat surface, and Since the grooves are machined parallel to or perpendicular to the sealing surface, the grooves can be processed to withstand deformation stress in the height direction when this flat aluminum electrolytic capacitor is surface mounted on a printed circuit board. This makes it difficult to deform, and as a result, deformation of the height of the approximately central portion of the metal case is suppressed, thereby reliably preventing the solder from coming off at the lead terminal portion due to deformation of the metal case.
第１図及び第２図は本発明の各実施例を示す偏平形アル
ミ電解コンデンサの斜視図、第３図は従来例を示す偏平
形アルミ電解コンデンサの縦断面図、第４図は同アルミ
電解コンデンサの斜視図、第５図は同アルミ電解コンデ
ンサの側断面図である。
１１・・・・・・金属ケース、ｌｌａ・・・・・・平面
部、１２・・・・・・陽極リード端子、１３・・・・・
・陰極リード端子、１４・・・・・・弾性封口体、１５
．１６・・・・・・溝部。Figures 1 and 2 are perspective views of flat aluminum electrolytic capacitors showing each embodiment of the present invention, Figure 3 is a vertical cross-sectional view of a flat aluminum electrolytic capacitor showing a conventional example, and Figure 4 is a perspective view of the same aluminum electrolytic capacitor. FIG. 5 is a perspective view of the capacitor, and FIG. 5 is a side sectional view of the same aluminum electrolytic capacitor. 11...Metal case, lla...Flat part, 12...Anode lead terminal, 13...
・Cathode lead terminal, 14...Elastic sealing body, 15
．． 16...Groove.
Claims (1)
電解液を含浸させてなるコンデンサ素子と、このコンデ
ンサ素子を収納する偏平形をなす有底筒状の金属ケース
と、この金属ケースの開放端の封止を行う封口体と、前
記コンデンサ素子より導出された陽極リード端子及び陰
極リード端子とを有し、前記偏平形をなす有底筒状の金
属ケースの平面部に、この平面部の中心部を通り、かつ
封止面と平行、あるいは垂直方向に溝部の加工を施した
ことを特徴とする偏平形アルミ電解コンデンサ。A capacitor element comprising an anode foil and a cathode foil wound together with a separator and impregnated with an electrolyte, a flat bottomed cylindrical metal case that houses the capacitor element, and a seal at the open end of the metal case. It has a sealing body for sealing, and an anode lead terminal and a cathode lead terminal led out from the capacitor element. A flat aluminum electrolytic capacitor characterized by having a groove formed parallel to or perpendicular to the sealing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4622190A JPH03248522A (en) | 1990-02-27 | 1990-02-27 | Flat aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4622190A JPH03248522A (en) | 1990-02-27 | 1990-02-27 | Flat aluminum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03248522A true JPH03248522A (en) | 1991-11-06 |
Family
ID=12741056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4622190A Pending JPH03248522A (en) | 1990-02-27 | 1990-02-27 | Flat aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03248522A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5365144A (en) * | 1992-06-10 | 1994-11-15 | Technology Services, Inc. | Electrical power supply unit for the supply of low power loads |
| JP2011210900A (en) * | 2010-03-29 | 2011-10-20 | Seiko Instruments Inc | Electrochemical cell and method of manufacturing the same |
-
1990
- 1990-02-27 JP JP4622190A patent/JPH03248522A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5365144A (en) * | 1992-06-10 | 1994-11-15 | Technology Services, Inc. | Electrical power supply unit for the supply of low power loads |
| JP2011210900A (en) * | 2010-03-29 | 2011-10-20 | Seiko Instruments Inc | Electrochemical cell and method of manufacturing the same |
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