JP2014072273A - Aluminum electrolytic capacitor - Google Patents

Aluminum electrolytic capacitor Download PDF

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JP2014072273A
JP2014072273A JP2012215583A JP2012215583A JP2014072273A JP 2014072273 A JP2014072273 A JP 2014072273A JP 2012215583 A JP2012215583 A JP 2012215583A JP 2012215583 A JP2012215583 A JP 2012215583A JP 2014072273 A JP2014072273 A JP 2014072273A
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lead
external terminal
lead tab
electrolytic capacitor
aluminum electrolytic
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Takahiro Ishikawa
貴大 石川
Tomoyuki Yoshii
智之 吉井
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Lincstech Circuit Co Ltd
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Hitachi AIC Inc
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/228—Terminals

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an aluminum electrolytic capacitor capable of obtaining mechanical connection strength by a rivet connection when connecting a lead tab to an external terminal, and also capable of reducing connection resistance when the diameter of the external terminal is small and the capacitor needs to correspond to a heavier current, since conventionally, connection between the lead tab of a capacitor element and the external terminal is performed by rivet connection in an aluminum electrolytic capacitor, but recently, a capacitor corresponding to a heavy current is desired.SOLUTION: In this aluminum electrolytic capacitor, the connection part between a projection provided in the external terminal and an extraction lead tab is provided by frictional agitation caused by a rotary tool.

Description

本発明は、アルミニウム電解コンデンサに関するものである。特に、アルミニウム電解コンデンサの引き出しリードタブと外部端子との接続に関するものである。   The present invention relates to an aluminum electrolytic capacitor. In particular, the present invention relates to a connection between a lead lead tab of an aluminum electrolytic capacitor and an external terminal.

アルミニウム電解コンデンサは、表面をエッチング処理し化成による酸化膜を形成した陽極箔と、表面をエッチング処理し酸化膜を形成しない、あるいは低圧化成による酸化膜を形成した陰極箔とを電解紙等のセパレータを介して巻き回したコンデンサ素子に電解液を含浸し、このコンデンサ素子をケース内に収納後、陽極箔および陰極箔の電極箔から引き出した引き出しリードタブを、封口板を貫通する外部端子にそれぞれ接続し、封口板をケースに取り付けて密閉した構造になっている。   An aluminum electrolytic capacitor is a separator made of electrolytic paper or the like, in which an anode foil whose surface is etched to form an oxide film by chemical conversion and a cathode foil whose surface is etched to form an oxide film or is formed by low pressure chemical conversion are formed. Capacitor element wound through a lead is impregnated with electrolyte, and after this capacitor element is stored in the case, the lead lead tabs drawn from the anode foil and the cathode foil are connected to external terminals penetrating the sealing plate, respectively. The sealing plate is attached to the case and sealed.

従来、このアルミニウム電解コンデンサにおいて、コンデンサ素子の陽極引き出しリードタブもしくは陰極引き出しリードタブと外部端子の接合は、リベット接合により行われている。
近年、大電流に対応したコンデンサが望まれている。この課題に対して、リベット接合は、機械的な締結であるため、接合部分表面の酸化膜のため接続抵抗が増加してしまいやすい。
そのため、特許文献１には、引き出しリードタブとその引き出しリードタブを押さえる押さえ板とにそれぞれ孔を設け、それらの孔を外部端子端面に設けた突起部に順にはめ、リベット接合により機械的接続強度を得るとともに、外部端子上の、引き出しリードタブと更にその上に押さえ板を重ねた箇所に、その押さえ板の表面から下に向かって回転ツールをもちいる摩擦攪拌接合による接合を設けることにより接続抵抗を低減する方法が開示されている。
特開２００４−３１１４７４号公報 Conventionally, in this aluminum electrolytic capacitor, the anode lead lead tab or the cathode lead lead tab of the capacitor element and the external terminal are joined by rivet joining.
In recent years, a capacitor corresponding to a large current has been desired. In response to this problem, rivet bonding is mechanical fastening, and therefore the connection resistance tends to increase due to an oxide film on the surface of the joint portion.
For this reason, in Patent Document 1, holes are provided in each of the lead lead tab and the holding plate for holding the lead lead tab, and the holes are sequentially fitted to the protrusions provided on the end surfaces of the external terminals, thereby obtaining mechanical connection strength by rivet joining. At the same time, the connection resistance is reduced by providing a friction stir welding joint that uses a rotating tool from the surface of the holding plate to the bottom of the external terminal, where the lead plate and the holding plate are further stacked. A method is disclosed.
JP 2004-31474 A

ところで、外部端子端面の表面積は限られているので、リベット接合により引き出しリードタブを押さえ板で外部端子に押さえつけたとしても、摩擦攪拌接合による回転摩擦力により、押さえ板が破断しやすく、引き出しリードタブと外部端子との間の、機械的接続強度と接続抵抗低減の両方の問題を同時に解決するのが困難になりやすい。   By the way, the surface area of the end face of the external terminal is limited. It tends to be difficult to simultaneously solve the problems of both mechanical connection strength and connection resistance reduction between the external terminals.

本発明は、上記の課題を解決するためになされたもので、限られた外部端子端面の表面において、外部端子と引き出しリードタブとの、リベット接合と、回転ツールによる摩擦攪拌による接合とが、支障なく得られることにより、引き出しリードタブと外部端子との間の、機械的接続強度と接続抵抗低減とを同時に得られるアルミニウム電解コンデンサを目的としている。   The present invention has been made in order to solve the above-described problems. On the surface of the limited external terminal end face, the rivet joint between the external terminal and the lead lead tab and the joint by friction agitation with a rotating tool are hindered. It is an object of the present invention to provide an aluminum electrolytic capacitor that can simultaneously obtain mechanical connection strength and connection resistance reduction between the lead lead tab and the external terminal.

本発明は、上記の課題を解決するために、下記のアルミニウム電解コンデンサを提供するものである。
（１）電極箔から引き出され外部端子に接続される引き出しリードタブと、その引き出しリードタブを前記外部端子に押さえる押さえ板と、前記外部端子の端部に設けられた突起部に、前記引き出しリードタブと押さえ板とにそれぞれ設けられた孔の部分がはめられ、その突起部をかしめてリベット接合されるアルミニウム電解コンデンサにおいて、前記突起部と、前記引き出しリードタブとの間に、摩擦攪拌による接合部分を有することを特徴とするアルミニウム電解コンデンサ。
（２）回転ツールを使用した摩擦攪拌による、前記突起部と、その突起部と前記押さえ板とにはさまれた前記引き出しリードタブ部分との間の接合部分を有することを特徴とする（１）のアルミニウム電解コンデンサ。 In order to solve the above problems, the present invention provides the following aluminum electrolytic capacitor.
(1) A lead lead tab drawn out from the electrode foil and connected to the external terminal, a pressing plate for pressing the lead lead tab to the external terminal, and a protrusion provided at an end of the external terminal, the lead lead tab and the press In the aluminum electrolytic capacitor in which the holes provided in the plate are fitted, and the protrusions are crimped to be rivet-bonded, a joint portion by friction stirrer is provided between the protrusion and the lead-out lead tab. Aluminum electrolytic capacitor characterized by
(2) It has a joint portion between the protrusion and the lead lead tab portion sandwiched between the protrusion and the pressing plate by friction stirring using a rotating tool (1) Aluminum electrolytic capacitor.

外部端子の突起部で引き出しリードタブをかしめてリベット接合するとともに、回転ツールによる摩擦攪拌により、前記突起部と前記引き出しリードタブとの間の接合部分が設けられていることにより、引き出しリードタブと外部端子との間の、機械的接続強度と接続抵抗低減のアルミニウム電解コンデンサを同時に得ることができる。   The lead lead tab is caulked and rivet-joined by the protrusion of the external terminal, and the joint portion between the protrusion and the lead lead tab is provided by frictional stirring by a rotating tool. An aluminum electrolytic capacitor with reduced mechanical resistance and connection resistance can be obtained at the same time.

本発明のアルミニウム電解コンデンサの作製手順を示す外部端子と引き出しリードタブとの接続部分の斜視図を示している。The perspective view of the connection part of the external terminal and drawer | drawing-out lead tab which shows the preparation procedure of the aluminum electrolytic capacitor of this invention is shown. 本発明のアルミニウム電解コンデンサの作製手順を示す外部端子と引き出しリードタブとの接続部分の断面図を示している。The sectional view of the connection part of the external terminal and drawer lead tab which shows the preparation procedure of the aluminum electrolytic capacitor of the present invention is shown. 本発明のアルミニウム電解コンデンサの作製手順を示す別の外部端子と引き出しリードタブとの接続部分の斜視図を示している。The perspective view of the connection part of another external terminal and drawer | drawing-out lead tab which shows the preparation procedures of the aluminum electrolytic capacitor of this invention is shown. 本発明のアルミニウム電解コンデンサの作製手順を示す別の外部端子と引き出しリードタブとの接続部分の斜視図を示している。The perspective view of the connection part of another external terminal and drawer | drawing-out lead tab which shows the preparation procedures of the aluminum electrolytic capacitor of this invention is shown.

本発明に述べる電極箔は、アルミニウム電解コンデンサの陽極と陰極とに使用される一般的な電極箔で、アルミニウムからなる。
陽極は、厚さ５０μｍから１５０μｍ程度のアルミニウム箔を、酸水溶液中、その表面をエッチング処理し、直径が０．１μｍから２μｍ程度のエッチングピットを設けた後、ホウ酸アンモニウム等の水溶液中で、定格電圧の１．５倍程度の電圧を印加して化成し、コンデンサとしての耐圧性の陽極酸化皮膜を形成したものである。
陰極は、厚さ２０μｍから１００μｍ程度のアルミニウム箔をそのまま、または酸水溶液中に浸漬し、その表面をエッチング処理したものである。 The electrode foil described in the present invention is a general electrode foil used for an anode and a cathode of an aluminum electrolytic capacitor, and is made of aluminum.
The anode is an aluminum foil having a thickness of about 50 μm to 150 μm, the surface of which is etched in an acid aqueous solution, an etching pit having a diameter of about 0.1 μm to 2 μm is provided, and then in an aqueous solution of ammonium borate or the like. It is formed by applying a voltage of about 1.5 times the rated voltage to form a pressure-resistant anodic oxide film as a capacitor.
The cathode is obtained by etching the surface of an aluminum foil having a thickness of about 20 μm to 100 μm as it is or dipped in an acid aqueous solution.

本発明に述べる引き出しリードタブは、５０μｍから５００μｍ程度の厚さのアルミニウム箔を、短冊状に切り出したもので、一般的には、エッチングなどの粗面化加工の施されていないプレンの箔が用いられている。少なくともその表面が９９．９％以上の純度のものを使用するのが好ましい。表面の純度を向上させる方法として、クラッド積層、表面蒸着またはメッキなど特に限定なく用いることができる。また、引き出しリードタブの芯となる部分は、シリコン等を添加し箔強度を上げると取り扱いが容易になる。また、陽極側の引き出しリードタブについては、陽極酸化が施されたものも使用される。   The lead lead tab described in the present invention is an aluminum foil having a thickness of about 50 μm to 500 μm cut into a strip shape. It has been. It is preferable to use a material having a purity of at least 99.9% on the surface. As a method for improving the purity of the surface, cladding lamination, surface vapor deposition, plating or the like can be used without any particular limitation. Further, the core portion of the lead lead tab can be easily handled by adding silicon or the like to increase the foil strength. As the lead-out lead tab on the anode side, anodized one is used.

本発明に述べる外部端子は、コンデンサケースの封口板にあって、封口板を貫通する端子で、引き出しリードタブと外部回路を電気的につなぐものである。外部端子は一般にほぼ円柱形に形成されており、たとえばこの外側面の中程に鍔が形成され、この鍔の部分が封口板に埋設される。また、一般には、外部端子の外側の端面には、ネジ穴が形成されたネジ端子となっている。外部端子の他端には、引き出しリードタブを接続固定するための接続部を設ける。この接続部として、外部端子の径よりも細くした突起部を設け、引き出しリータブドの端部に穴をあけてその突起部に差し込み、次に押さえ板としての平ワッシャを差し込み、機械的にかしめるリベット接合のリベット止めをする。この突起部は、たとえば柱形に形成されており、加工上柱状体の軸と同じ軸方向にあるのが好ましい。また、突起部の径は、太いほど突起部に差し込む押さえ板を固定しやすいが、太すぎると押さえ板自体の押さえ面積が減少する。
また、絶縁板とゴム板を張り合わせたタイプの封口板の場合、外部端子はリベットとそれに取り付けた金属板端子からなり、他端には、引き出しリードタブを接続固定するため、上記と同様に、引き出しリードタブの端部に穴をあけてリベットから突出した突起部に差し込み、次に押さえ板としてたとえば平ワッシャを差し込み、機械的にかしめるリベット接合のリベット止めをする。 The external terminal described in the present invention is a terminal penetrating the sealing plate on the sealing plate of the capacitor case, and electrically connects the lead lead tab and the external circuit. The external terminal is generally formed in a substantially cylindrical shape. For example, a ridge is formed in the middle of the outer surface, and the ridge portion is embedded in the sealing plate. In general, a screw terminal having a screw hole is formed on the outer end face of the external terminal. At the other end of the external terminal, a connection portion for connecting and fixing the lead lead tab is provided. As this connection part, a projection part thinner than the diameter of the external terminal is provided, a hole is made in the end part of the drawer leaded tab and inserted into the projection part, and then a flat washer as a holding plate is inserted and mechanically caulked. Rivet the rivet joint. This protrusion is formed in, for example, a column shape, and is preferably in the same axial direction as the axis of the processed columnar body. Further, the larger the diameter of the protruding portion, the easier it is to fix the pressing plate inserted into the protruding portion, but if it is too thick, the pressing area of the pressing plate itself decreases.
In the case of a sealing plate in which an insulating plate and a rubber plate are pasted together, the external terminal consists of a rivet and a metal plate terminal attached to it, and the other end is connected to and fixed to a lead lead tab. A hole is made in the end portion of the lead tab and inserted into a protruding portion protruding from the rivet, and then a flat washer is inserted as a pressing plate, for example, and riveting of the rivet joint that is mechanically caulked is performed.

本発明に述べる押さえ板は、引き出しリードタブの表面に設け、引き出しリードタブを外部端子に押さえ込む板で、引き出しリードタブとともに孔を設け、外部端子の端面に設けた突起部にはめ、突起部をかしめて押さえ込む。一般的にはアルミニウム製で、より強度を得るためには、シリコン、マグネシウム等を添加する。形状は、外部端子の端面と同形となるが、一般的には、方向性のない円盤系で、中心に孔を設けたものとなる。   The holding plate described in the present invention is a plate that is provided on the surface of the lead lead tab and presses the lead lead tab to the external terminal. . Generally, it is made of aluminum, and silicon, magnesium, etc. are added to obtain higher strength. The shape is the same as that of the end face of the external terminal, but is generally a disk system having no directionality and having a hole in the center.

本発明に述べる摩擦攪拌接合は、回転ツールをもちいる接合で、回転ツールは、先端に設けるピン部とピン部よりも太い径のショルダ部とを有する。回転は、１００００ｒｐｍから５０００００ｒｐｍ程度で、ピン部の長さは、かしめ後の外部端子の突起部の長さ程度、ピン部の直径は、外部端子の突起部の直径の半分以下程度で、たとえば０．５ｍｍから３ｍｍ程度となる。
摩擦攪拌接合の箇所は、外部端子の突起部と、引き出しリードタブとの間で、そのために、回転ツールの圧入箇所は、外部端子の突起部と引き出しリードタブとの境目付近となるが、引き出しリードタブのほうが放熱性が低く加熱されやすい場合には、突起部により寄せたほうが平均的に加熱され好ましい。また、突起部により寄せたほうがかしめ強度が減少し難くその点でも好ましい。
また、回転ツールは、圧入後横に数ｍｍ程度移動後引き抜くかまたは、この移動によりかしめ強度が減少する場合、圧入後そのまま引き抜いてもよい。また、ひとつの外部端子に対して、二カ所以上設けてもよい。 The friction stir welding described in the present invention is a joining using a rotating tool, and the rotating tool has a pin portion provided at the tip and a shoulder portion having a diameter larger than that of the pin portion. The rotation is about 10,000 to 500,000 rpm, the length of the pin portion is about the length of the protruding portion of the external terminal after caulking, and the diameter of the pin portion is about half or less of the diameter of the protruding portion of the external terminal. .5mm to about 3mm.
The friction stir welding location is between the protrusion of the external terminal and the lead lead tab, and for this reason, the press-fitting location of the rotary tool is near the boundary between the protrusion of the external terminal and the lead lead tab. In the case where the heat dissipation property is low and it is easy to be heated, it is preferable that it is heated on average by the protrusions. Further, it is preferable to bring the protrusions closer together because the caulking strength is less likely to decrease.
Further, the rotary tool may be pulled out after being moved by several millimeters after press-fitting, or may be pulled out after press-fitting if the caulking strength is reduced by this movement. Two or more locations may be provided for one external terminal.

以下、本発明の実施の形態を図面に基づいて説明する。
図１は、本発明のアルミニウム電解コンデンサの作製手順を示す外部端子と引き出しリードタブとの接続部分の斜視図を示している。図1（ａ）は引き出しリードタブを外部端子に差し込む前を、図1（ｂ）は摩擦攪拌接合前の状態を示している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a perspective view of a connection portion between an external terminal and a lead lead tab, showing the procedure for producing the aluminum electrolytic capacitor of the present invention. FIG. 1A shows a state before the lead lead tab is inserted into the external terminal, and FIG. 1B shows a state before the friction stir welding.

外部端子１は柱状で、断面が円形のものが加工しやすい。またその端面に設ける突起部２も加工の点でその円柱の中心軸方向に設ける。突起部２には必要な数の引き出しリードタブ３とそれを押さえる押さえ板４が差し込まれ、かしめ加工される。突起部２の直径は、外部端子１の直径の１／５から１／２が好ましく、外部端子１の直径の１／５よりも小さいと押さえ込む強度が取れにくくなり、外部端子１の直径の１／２より大きいと押さえ込む面積が減少しやすい。
また、かしめ加工後、回転ツール６の圧入場所は、外部端子１の突起部２の側面側と、それと接する引き出しリードタブ３の孔５の内壁側との間で行う。 The external terminal 1 is columnar and has a circular cross section, which is easy to process. Further, the protrusion 2 provided on the end face is also provided in the direction of the central axis of the cylinder in terms of processing. A necessary number of lead lead tabs 3 and a pressing plate 4 that holds the protrusion lead tabs 3 are inserted into the protrusions 2 and caulked. The diameter of the protrusion 2 is preferably 1/5 to 1/2 of the diameter of the external terminal 1. If the diameter is smaller than 1/5 of the diameter of the external terminal 1, the pressing strength is difficult to obtain. If it is larger than / 2, the area to be pressed down tends to decrease.
In addition, after the caulking process, the press-fitting place of the rotary tool 6 is performed between the side surface side of the protruding portion 2 of the external terminal 1 and the inner wall side of the hole 5 of the lead lead tab 3 in contact therewith.

図２は、本発明のアルミニウム電解コンデンサの作製手順を示す外部端子と引き出しリードタブとの接続部分の断面図を示している。図２（ａ）はリベット接合後、摩擦攪拌接合前の状態を、図２（ｂ）は摩擦攪拌接合後の状態を示している。外部端子１の突起部２は、かしめ加工によりその頭部が変形し、押さえ板４と外部端子１の端面とで引き出しリードタブ３を機械的にはさんでいる。また、摩擦攪拌接合後はそれに加え、外部端子１の突起部２の側面側と、それと接する引き出しリードタブ３の孔５の内壁側との間で、回転ツールの圧入による攪拌部７を設けている。
なお、引き出しリードタブ３は、アルミニウムのため表面に酸化膜があり、かしめ加工部分は、外部端子１と引き出しリードタブ３との電気的な接続では酸化膜抵抗分を持っている。一方、摩擦攪拌接合した後の状態では、突起部２、引き出しリードタブ３、押さえ板４、または外部端子１本体の間で固相接合され、少なくとも突起部２と引き出しリードタブ３とが固相接合される。 FIG. 2 shows a cross-sectional view of the connection portion between the external terminal and the lead lead tab, showing the procedure for producing the aluminum electrolytic capacitor of the present invention. FIG. 2A shows a state after rivet joining and before friction stir welding, and FIG. 2B shows a state after friction stir welding. The protrusion 2 of the external terminal 1 has its head deformed by caulking, and the lead plate 3 is mechanically sandwiched between the holding plate 4 and the end surface of the external terminal 1. Further, after the friction stir welding, in addition to this, a stirring portion 7 is provided by press-fitting a rotary tool between the side surface side of the protrusion 2 of the external terminal 1 and the inner wall side of the hole 5 of the lead-out lead tab 3 in contact therewith. .
The lead lead tab 3 is made of aluminum and has an oxide film on the surface thereof. The caulking portion has an oxide film resistance component in the electrical connection between the external terminal 1 and the lead lead tab 3. On the other hand, in the state after the friction stir welding, solid phase bonding is performed between the protrusion 2, the lead lead tab 3, the holding plate 4, or the external terminal 1 main body, and at least the protrusion 2 and the lead lead tab 3 are solid phase bonded. The

また、図３は、本発明のアルミニウム電解コンデンサの作製手順を示す別の外部端子と引き出しリードタブとの接続部分の斜視図を示している。引き出しリードタブを外部端子に差し込む前の状態を示している。引き出しリードタブ３の孔５が放射線状の切り込みとなっている。外部端子１の突起部２に切り込み引き出しリードタブ３が差し込まれると、この引き出しリードタブ３の孔５放射線状の切り込みが図３では上に９０度ほど変形する。なお、放射線状の切り込みの代わりに、引き出しリードタブ３の孔５の直径を、外部端子１の突起部２の直径より小さくすることにより、差し込む時に亀裂が入り同様な切り込みとなる。   FIG. 3 is a perspective view of a connecting portion between another external terminal and a lead lead tab, showing the procedure for producing the aluminum electrolytic capacitor of the present invention. A state before the lead lead tab is inserted into the external terminal is shown. The hole 5 of the lead lead tab 3 is a radial cut. When the cut-out lead tab 3 is inserted into the protrusion 2 of the external terminal 1, the radial cut of the hole 5 in the lead-out lead tab 3 is deformed by 90 degrees upward in FIG. In place of the radial notch, by making the diameter of the hole 5 of the lead lead tab 3 smaller than the diameter of the protrusion 2 of the external terminal 1, a crack occurs when inserting and the same notch is obtained.

図４は、図３の引き出しリードタブ３を使用した場合を示していて、断面図を示している。図４（ａ）はリベット接合後、摩擦攪拌接合前の状態を、図４（ｂ）は摩擦攪拌接合後の状態を示している。
引き出しリードタブ３の孔５の放射線状の切り込み部分が、外部端子１の突起部２側面と押さえ板４の孔５の内壁側との間に、引き出しリードタブ３が介在することとなり、かしめによる外部端子１と引き出しリードタブ３との間の接続面積が増加する。またそれだけではなく、図４（ｂ）に示すように、外部端子１の突起部２の側面と、押さえ板４の孔５の内壁側との間に回転ツールの圧入による攪拌部７を設けると、押さえ板４と突起部２の間には、引き出しリードタブ３の介在部分が存在するので、外部端子１と引き出しリードタブ３との接続抵抗の低減化に寄与することができる。 FIG. 4 shows a case where the drawer lead tab 3 of FIG. 3 is used, and shows a cross-sectional view. FIG. 4A shows a state after rivet bonding and before friction stir welding, and FIG. 4B shows a state after friction stir welding.
The lead-out lead tab 3 is interposed between the side surface of the protruding portion 2 of the external terminal 1 and the inner wall side of the hole 5 of the holding plate 4 at the radial cut portion of the hole 5 of the lead-out lead tab 3, and the external terminal by caulking The connection area between 1 and the lead lead tab 3 is increased. In addition, as shown in FIG. 4B, when a stirring portion 7 is provided between the side surface of the protruding portion 2 of the external terminal 1 and the inner wall side of the hole 5 of the pressing plate 4 by press-fitting a rotary tool. Since there is an intervening portion of the lead-out lead tab 3 between the presser plate 4 and the protruding portion 2, it is possible to contribute to a reduction in connection resistance between the external terminal 1 and the lead-out lead tab 3.

（実施例１）
本発明のアルミニウム電解コンデンサの外部端子と引き出しリードタブとの接続方法を説明する。図１（ａ）に示すように、直径９ｍｍの外部端子１の端面に直径３ｍｍの突起部２を設け、幅９ｍｍ、厚さ０．１ｍｍの３枚１組の引き出しリードタブ３と、それを押さえる直径９ｍｍ、厚さ２ｍｍの押さえ板４とに、突起部２に差し込む直径３ｍｍの孔５をそれぞれ設ける。
次に、引き出しリードタブ３、押さえ板４の順に、突起部２に差し込み、図１（ｂ）に示すように、かしめによるリベット止めをする。次に、外部端子１の突起部２の側面側と、それと接する引き出しリードタブ３の孔５の内壁側との間に、ショルダの直径４ｍｍ、ピンの直径１ｍｍの回転ツール６を回転数２００００ｒｐｍで圧入し、回転ツール６を使用した摩擦攪拌によって、突起部２と引き出しリードタブ３との間に接合部分を設ける。
なお、引き出しリードタブ３は、アルミニウムのため表面に自然酸化膜があり、かしめ加工による外部端子１と引き出しリードタブ３との電気的な接続では酸化膜抵抗分を持っている。摩擦攪拌接合した後の状態では、突起部２、引き出しリードタブ３、押さえ板４、または外部端子１本体の間で固相接合され、少なくとも突起部２と引き出しリードタブ３とが固相接合される。 Example 1
A method for connecting the external terminal of the aluminum electrolytic capacitor of the present invention to the lead lead tab will be described. As shown in FIG. 1A, a projection portion 2 having a diameter of 3 mm is provided on an end face of an external terminal 1 having a diameter of 9 mm, and a set of three lead lead tabs 3 having a width of 9 mm and a thickness of 0.1 mm are pressed. The holding plate 4 having a diameter of 9 mm and a thickness of 2 mm is provided with a hole 5 having a diameter of 3 mm to be inserted into the protrusion 2.
Next, the lead lead tab 3 and the pressing plate 4 are inserted into the protruding portion 2 in this order, and riveted by caulking as shown in FIG. Next, a rotary tool 6 having a shoulder diameter of 4 mm and a pin diameter of 1 mm is press-fitted at a rotational speed of 20000 rpm between the side surface side of the protrusion 2 of the external terminal 1 and the inner wall side of the hole 5 of the lead lead tab 3 in contact therewith. Then, a joint portion is provided between the protrusion 2 and the lead lead tab 3 by friction stirring using the rotary tool 6.
The lead lead tab 3 is made of aluminum and has a natural oxide film on the surface thereof. The electrical connection between the external terminal 1 and the lead lead tab 3 by caulking has an oxide film resistance. In a state after the friction stir welding, solid phase bonding is performed between the protrusion 2, the lead lead tab 3, the pressing plate 4, or the external terminal 1 body, and at least the protrusion 2 and the lead lead tab 3 are solid phase bonded.

（実施例２）
本発明のアルミニウム電解コンデンサの別の外部端子と引き出しリードタブとの接続方法を説明する。図３に示すように、引き出しリードタブ３の孔５として放射線状の切り込みの孔５を設ける以外実施例１と同様にかしめによるリベット止めをし、次に、外部端子１の突起部２の側面側と、それと接する引き出しリードタブ３の孔５の内壁側との間に回転ツール６を圧入し、回転ツール６を使用した摩擦攪拌によって、突起部２、引き出しリードタブ３、押さえ板４、または外部端子１本体の間で固相接合され、少なくとも突起部２と引き出しリードタブ３とが固相接合される。
(Example 2)
A method of connecting another external terminal of the aluminum electrolytic capacitor of the present invention to the lead lead tab will be described. As shown in FIG. 3, riveting is performed by caulking in the same manner as in Example 1 except that a radial cut hole 5 is provided as the hole 5 of the lead lead tab 3, and then the side surface side of the protruding portion 2 of the external terminal 1. Then, the rotary tool 6 is press-fitted between the lead wire tab 3 and the inner wall side of the hole 5 of the lead lead tab 3 in contact therewith, and the protrusion 2, the lead lead tab 3, the pressing plate 4, or the external terminal 1 by friction stirring using the rotary tool 6 Solid phase bonding is performed between the main bodies, and at least the protrusion 2 and the lead lead tab 3 are solid phase bonded.

１…外部端子、２…突起部、３…引き出しリードタブ、４…押さえ板、５…孔、６…回転ツール、７…攪拌部   DESCRIPTION OF SYMBOLS 1 ... External terminal, 2 ... Projection part, 3 ... Lead lead tab, 4 ... Holding plate, 5 ... Hole, 6 ... Rotating tool, 7 ... Stirring part

Claims (2)

電極箔から引き出され外部端子に接続される引き出しリードタブと、その引き出しリードタブを前記外部端子に押さえる押さえ板と、前記外部端子の端部に設けられた突起部に、前記引き出しリードタブと押さえ板とにそれぞれ設けられた孔の部分がはめられ、その突起部をかしめてリベット接合されるアルミニウム電解コンデンサにおいて、前記突起部と、前記引き出しリードタブとの間に、摩擦攪拌による接合部分を有することを特徴とするアルミニウム電解コンデンサ。   A lead-out lead tab drawn out from the electrode foil and connected to the external terminal, a holding plate for pressing the lead-out lead tab to the external terminal, and a protrusion provided at an end of the external terminal, the lead-out lead tab and the holding plate In the aluminum electrolytic capacitor in which the holes provided are fitted and rivet-bonded by caulking the protrusions, the aluminum electrolytic capacitor has a connection part by friction stir between the protrusions and the lead-out lead tabs. Aluminum electrolytic capacitor to be used. 前記突起部と、その突起部と前記押さえ板とにはさまれた前記引き出しリードタブ部分との間に、摩擦攪拌による接合部分を有することを特徴とする請求項１のアルミニウム電解コンデンサ。   2. The aluminum electrolytic capacitor according to claim 1, further comprising: a joint portion formed by friction stir between the projection portion and the lead-out lead tab portion sandwiched between the projection portion and the pressing plate.
JP2012215583A 2012-09-28 2012-09-28 Aluminum electrolytic capacitor Pending JP2014072273A (en)

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KR101791988B1 (en) * 2016-05-23 2017-10-31 주식회사 비츠로셀 Electric double layer capacitor with excellent contact resistance property
WO2018024784A1 (en) * 2016-08-04 2018-02-08 Electronicon Kondensatoren Gmbh Electrical connection assembly having tear-off protection function
CN111937108A (en) * 2018-04-06 2020-11-13 Tdk电子股份有限公司 Electrolytic capacitor with improved connection
CN112640018A (en) * 2018-09-06 2021-04-09 湖北工业株式会社 Lead terminal and method for manufacturing the same
JP2021518054A (en) * 2018-04-06 2021-07-29 ティーディーケイ・エレクトロニクス・アクチェンゲゼルシャフトＴｄｋ Ｅｌｅｃｔｒｏｎｉｃｓ Ａｇ Electrolytic capacitors with improved connections

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KR101791988B1 (en) * 2016-05-23 2017-10-31 주식회사 비츠로셀 Electric double layer capacitor with excellent contact resistance property
WO2018024784A1 (en) * 2016-08-04 2018-02-08 Electronicon Kondensatoren Gmbh Electrical connection assembly having tear-off protection function
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JP2021518054A (en) * 2018-04-06 2021-07-29 ティーディーケイ・エレクトロニクス・アクチェンゲゼルシャフトＴｄｋ Ｅｌｅｃｔｒｏｎｉｃｓ Ａｇ Electrolytic capacitors with improved connections
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