JP4557099B2 - Multilayer capacitor and manufacturing method thereof - Google Patents

Multilayer capacitor and manufacturing method thereof Download PDF

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Publication number
JP4557099B2
JP4557099B2 JP23900799A JP23900799A JP4557099B2 JP 4557099 B2 JP4557099 B2 JP 4557099B2 JP 23900799 A JP23900799 A JP 23900799A JP 23900799 A JP23900799 A JP 23900799A JP 4557099 B2 JP4557099 B2 JP 4557099B2
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Japan
Prior art keywords
foil
separator
cathode
anode
multilayer capacitor
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JP23900799A
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JP2001068373A (en
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伯昭 岡崎
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Nippon Chemi Con Corp
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Nippon Chemi Con Corp
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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
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/32—Wound capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Ceramic Capacitors (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は積層型コンデンサ及びその製造方法に関し、特に、そのコンデンサ素子の改良に関する。
【０００２】
【従来の技術】
積層型コンデンサのコンデンサ素子は、一般に、複数の陽極箔と陰極箔を交互に積層し、その間にセパレータを介在させて構成されている。このため、このようなコンデンサ素子は、例えば屏風状に葛折りされた帯状セパレータ１（図６（ａ）参照）を用いたり、或いは多数のシート状セパレータ２（図６（ｂ）参照）を用いたりして、陽極箔３と陰極箔４を交互に積層した構造となっている。
【０００３】
【発明が解決しようとする課題】
しかしながら、図６に示したセパレータを用いると、陽極箔および陰極箔がコンデンサ素子の製造過程で位置ずれを起こす可能性があり、陽極箔および陰極箔に位置ずれが生じた場合には、位置ずれを起こした陽極箔および陰極箔を元の位置に戻すための困難な作業が伴う。このため、前述した従来の積層型コンデンサにおいては、陽極箔および陰極箔が位置ずれを起こさないようにコンデンサ素子を慎重に組み立てなければならず、コンデンサ素子の組立作業を能率的に行うことが困難であった。
【０００４】
そこで、本発明の目的は、陽極箔および陰極箔の位置ずれを発生させることなくコンデンサ素子の組み立て作業を能率的に行うことのできる積層型コンデンサ及びその製造方法を提供することにある。
【０００５】
【課題を解決するための手段】
前記目的を達成するために、本発明に係る積層型コンデンサの製造方法は、複数の陽極箔と陰極箔をその間に１枚のセパレータを介在させて交互に積層したコンデンサ素子を有する積層型コンデンサの製造方法であって、前記陽極箔および前記陰極箔は、前記セパレータの巻回過程でセパレータ中に組み込まれる際に巻回される前記１枚のセパレータ同士の間に挟まれて互いに対向するように組み込まれることを特徴とする積層型コンデンサの製造方法において、断面が扁平形状をなす巻軸の全周に前記１枚のセパレータを巻き付けた後に、巻軸の上に陽極箔又は陰極箔を載置し、巻軸を半回転させて巻軸の上に陰極箔又は陽極箔を載置する工程と巻軸を半回転させて巻軸の上に陽極箔又は陰極箔を載置する工程とを繰り返すことにより、前記複数の陽極箔および陰極箔を扁平渦巻状に形成された前記１枚のセパレータ中に該１枚のセパレータを間に挟んで互いに対向するように組み込むことを特徴とする。また、陽極箔および陰極箔はセパレータの一側面から突出する電極タブをそれぞれ有し、電極タブは陽極箔および陰極箔と一体に形成されてもよく、陽極箔は、弁金属箔を陽極酸化して形成されてもよく、陽極箔および陰極箔は、アルミニウム箔の表面に活性炭層からなる分極性電極層を形成してもよい。
【０００８】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【０００９】
図１は本発明の一実施形態に係る積層型コンデンサのコンデンサ素子の斜視図で、図２は同素子の縦断面図である。図１及び図２において、コンデンサ素子１０は扁平渦巻状に形成されたセパレータ１２と、このセパレータ１２の中に互いに対向するように組み込まれた複数の陽極箔１４および陰極箔１６とを備えて構成されている。
【００１０】
陽極箔１４および陰極箔１６はアルミニウム等の金属箔からなり、セパレータ１２を間に挟んで交互に重なり合っている。また、陽極箔１４および陰極箔１６はセパレータ１２の一側面から突出する電極タブ１８をそれぞれ有しており、この電極タブ１８は、帯状の電極タブ１８をステッチや超音波溶接等により陽極箔および陰極箔に取り付けたものや、図３に示されるように、陽極箔１４および陰極箔１６と一体に形成されたものでもよい。なお、セパレータ１２は紙、プラスチックフィルム等の薄葉絶縁材からなり、その周りには素子止めテープ（図示せず）が巻回されている。
【００１１】
このように構成されるコンデンサ素子１０は、例えば図４に示す方法によって作成することが可能である。すなわち、先ず、断面が扁平形状をなす巻軸２０の全周にセパレータ１２を巻き付けた後（図４（ａ）参照）、巻軸２０の上に陽極箔１４（又は陰極箔１６）を載置する（図４（ｂ）参照）。次に、巻軸２０を矢印方向（図中反時計方向）に半回転させた後、巻軸２０の上に陰極箔１６（又は陽極箔１４）を載置する（図４（ｃ）参照）。次に、巻軸２０を矢印方向（図中反時計方向）に半回転させた後、巻軸２０の上に陽極箔１４（又は陰極箔１６）を載置する（図４（ｄ）参照）。そして、図４（ｂ）から（ｄ）に示した工程を繰り返すことにより、図１及び図２に示したコンデンサ素子１０が得られる。
【００１２】
上述した本発明の一実施形態では、セパレータ１２を扁平渦巻状に形成するとともに、陽極箔１４および陰極箔１６を扁平渦巻状に形成されたセパレータ１２の中に同セパレータ１２を間に挟んで互いに対向するように組み込むことにより、陽極箔１４および陰極箔１６の両端部がセパレータ１２によって位置決め固定される。従って、コンデンサ素子１０の組み立て作業中に陽極箔１４および陰極箔１６が位置ずれを起こすことがないので、陽極箔１４および陰極箔１６の位置ずれを発生させることなくコンデンサ素子１０の組み立て作業を能率的に行うことができる。
【００１３】
また、上述した本発明の一実施形態では、断面が扁平形状の巻軸２０を用いてセパレータ１２を扁平渦巻状に形成し、その形成過程で陽極箔１４および陰極箔１６をセパレータ１２の中に組み込むので、コンデンサ素子１０の組み立て作業をより能率的に行うことができる。
【００１４】
なお、本発明に係る積層型コンデンサを電解コンデンサとして用いる場合には、陽極箔１４はアルミニウム等の弁金属箔を陽極酸化し、その表面に酸化膜層を形成したものが好ましい。また、本発明に係る積層型コンデンサを電気二重層コンデンサとして用いる場合には、陽極箔１４および陰極箔１６は、図５に示されるように、アルミニウム箔２２の表面に活性炭層からなる分極性電極層２４を形成したものが好ましい。
【００１５】
【発明の効果】
以上説明したように、本発明によれば、複数の陽極箔と陰極箔をその間にセパレータを介在させて交互に積層したコンデンサ素子を有する積層型コンデンサにおいて、前記セパレータを扁平状に巻装するとともに、陽極箔および陰極箔を巻装セパレータ中にセパレータを間に挟んで互いに対向するように組み込むことにより、陽極箔および陰極箔の両端部がセパレータによって位置決め固定されるため、陽極箔および陰極箔の位置ずれを発生させることなくコンデンサ素子の組み立て作業を能率的に行うことができる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る積層型コンデンサのコンデンサ素子の斜視図である。
【図２】図１に示すコンデンサ素子の縦断面図である。
【図３】図２に示す陽極箔および陰極箔の平面図である。
【図４】図１に示すコンデンサ素子の作成方法を示す図である。
【図５】アルミニウム箔の表面に活性炭層からなる分極性電極層を有する電極箔を示す図である。
【図６】従来の積層型コンデンサに使用されるセパレータを示す図である。
【符号の説明】
１０ コンデンサ素子
１２ セパレータ
１４ 陽極箔
１６ 陰極箔
１８ 電極タブ
２０ 巻軸[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multilayer capacitor and a method for manufacturing the same, and more particularly to improvement of the capacitor element.
[0002]
[Prior art]
A capacitor element of a multilayer capacitor is generally configured by alternately laminating a plurality of anode foils and cathode foils and interposing a separator therebetween. For this reason, such a capacitor element uses, for example, a strip-shaped separator 1 (see FIG. 6A) folded in a folding screen shape, or uses a large number of sheet-like separators 2 (see FIG. 6B). In other words, the anode foil 3 and the cathode foil 4 are alternately laminated.
[0003]
[Problems to be solved by the invention]
However, when the separator shown in FIG. 6 is used, there is a possibility that the anode foil and the cathode foil may be misaligned during the manufacturing process of the capacitor element. This is accompanied by a difficult operation for returning the anode foil and the cathode foil that have caused the failure to their original positions. For this reason, in the conventional multilayer capacitor described above, it is necessary to carefully assemble the capacitor element so that the anode foil and the cathode foil are not displaced, and it is difficult to efficiently assemble the capacitor element. Met.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a multilayer capacitor capable of efficiently performing an assembly operation of a capacitor element without causing displacement of the anode foil and the cathode foil, and a method for manufacturing the same.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a multilayer capacitor manufacturing method according to the present invention includes a multilayer capacitor having a capacitor element in which a plurality of anode foils and cathode foils are alternately stacked with a separator interposed therebetween. In the manufacturing method, the anode foil and the cathode foil are sandwiched between the one separator wound when being incorporated in the separator in the winding process of the separator so as to face each other. In the method of manufacturing a multilayer capacitor, wherein the separator is wound around the entire circumference of a winding shaft having a flat cross section, and then an anode foil or a cathode foil is placed on the winding shaft. The step of placing the cathode foil or the anode foil on the winding shaft by rotating the winding shaft halfway and the step of placing the anode foil or the cathode foil on the winding shaft by rotating the winding shaft halfway are repeated. By before Across in a plurality of the anode foil and the one of the cathode foil is formed into a flat spiral separator between the one separator, characterized in that incorporated so as to face each other. The anode foil and the cathode foil each have an electrode tab protruding from one side of the separator, and the electrode tab may be formed integrally with the anode foil and the cathode foil, and the anode foil anodizes the valve metal foil. The anode foil and the cathode foil may form a polarizable electrode layer made of an activated carbon layer on the surface of the aluminum foil.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0009]
FIG. 1 is a perspective view of a capacitor element of a multilayer capacitor according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the element. 1 and 2, a capacitor element 10 includes a separator 12 formed in a flat spiral shape, and a plurality of anode foils 14 and cathode foils 16 incorporated in the separator 12 so as to face each other. Has been.
[0010]
The anode foil 14 and the cathode foil 16 are made of a metal foil such as aluminum, and are alternately overlapped with the separator 12 interposed therebetween. Each of the anode foil 14 and the cathode foil 16 has an electrode tab 18 protruding from one side surface of the separator 12, and the electrode tab 18 is formed of the anode foil and the anode foil 18 by stitching or ultrasonic welding. It may be attached to the cathode foil or formed integrally with the anode foil 14 and the cathode foil 16 as shown in FIG. The separator 12 is made of a thin insulating material such as paper or plastic film, and an element fixing tape (not shown) is wound around the separator 12.
[0011]
The capacitor element 10 configured in this way can be produced by, for example, the method shown in FIG. That is, first, after winding the separator 12 around the entire circumference of the winding shaft 20 having a flat cross section (see FIG. 4A), the anode foil 14 (or the cathode foil 16) is placed on the winding shaft 20. (See FIG. 4B). Next, after rotating the winding shaft 20 halfway in the direction of the arrow (counterclockwise in the figure), the cathode foil 16 (or the anode foil 14) is placed on the winding shaft 20 (see FIG. 4C). . Next, after rotating the winding shaft 20 halfway in the direction of the arrow (counterclockwise in the figure), the anode foil 14 (or the cathode foil 16) is placed on the winding shaft 20 (see FIG. 4D). . Then, by repeating the steps shown in FIGS. 4B to 4D, the capacitor element 10 shown in FIGS. 1 and 2 is obtained.
[0012]
In the embodiment of the present invention described above, the separator 12 is formed in a flat spiral shape, and the anode foil 14 and the cathode foil 16 are sandwiched between the separator 12 formed in a flat spiral shape, and the separator 12 is sandwiched between them. By incorporating them so as to face each other, both end portions of the anode foil 14 and the cathode foil 16 are positioned and fixed by the separator 12. Therefore, since the anode foil 14 and the cathode foil 16 are not displaced during the assembly operation of the capacitor element 10, the assembly operation of the capacitor element 10 is efficiently performed without causing the displacement of the anode foil 14 and the cathode foil 16. Can be done automatically.
[0013]
Moreover, in one Embodiment of this invention mentioned above, the separator 12 is formed in flat spiral shape using the winding axis 20 with a flat cross section, and the anode foil 14 and the cathode foil 16 are put in the separator 12 in the formation process. Since it is incorporated, the assembly operation of the capacitor element 10 can be performed more efficiently.
[0014]
When the multilayer capacitor according to the present invention is used as an electrolytic capacitor, it is preferable that the anode foil 14 is formed by anodizing a valve metal foil such as aluminum and forming an oxide film layer on the surface thereof. When the multilayer capacitor according to the present invention is used as an electric double layer capacitor, the anode foil 14 and the cathode foil 16 are polarizable electrodes made of an activated carbon layer on the surface of an aluminum foil 22, as shown in FIG. What formed the layer 24 is preferable.
[0015]
【The invention's effect】
As described above, according to the present invention, in a multilayer capacitor having a capacitor element in which a plurality of anode foils and cathode foils are alternately stacked with separators interposed therebetween, the separator is wound in a flat shape. Since both ends of the anode foil and the cathode foil are positioned and fixed by the separator by incorporating the anode foil and the cathode foil into the winding separator so as to face each other with the separator in between, the anode foil and the cathode foil Assembling work of the capacitor element can be efficiently performed without causing positional displacement.
[Brief description of the drawings]
FIG. 1 is a perspective view of a capacitor element of a multilayer capacitor according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the capacitor element shown in FIG.
3 is a plan view of the anode foil and the cathode foil shown in FIG. 2. FIG.
4 is a diagram showing a method for producing the capacitor element shown in FIG. 1. FIG.
FIG. 5 is a view showing an electrode foil having a polarizable electrode layer made of an activated carbon layer on the surface of an aluminum foil.
FIG. 6 is a diagram showing a separator used in a conventional multilayer capacitor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Capacitor element 12 Separator 14 Anode foil 16 Cathode foil 18 Electrode tab 20 Winding axis

Claims (4)

複数の陽極箔と陰極箔をその間に１枚のセパレータを介在させて交互に積層したコンデンサ素子を有する積層型コンデンサの製造方法であって、A method of manufacturing a multilayer capacitor having a capacitor element in which a plurality of anode foils and cathode foils are alternately stacked with a single separator interposed therebetween,
前記陽極箔および前記陰極箔は、前記セパレータの巻回過程でセパレータ中に組み込まれる際に巻回される前記１枚のセパレータ同士の間に挟まれて互いに対向するように組み込まれることを特徴とする積層型コンデンサの製造方法において、The anode foil and the cathode foil are incorporated so as to face each other by being sandwiched between the one separator wound when being incorporated into the separator in the winding process of the separator. In the manufacturing method of the multilayer capacitor
断面が扁平形状をなす巻軸の全周に前記１枚のセパレータを巻き付けた後に、巻軸の上に陽極箔又は陰極箔を載置し、巻軸を半回転させて巻軸の上に陰極箔又は陽極箔を載置する工程と巻軸を半回転させて巻軸の上に陽極箔又は陰極箔を載置する工程とを繰り返すことにより、前記複数の陽極箔および陰極箔を扁平渦巻状に形成された前記１枚のセパレータ中に該１枚のセパレータを間に挟んで互いに対向するように組み込むことを特徴とする積層型コンデンサの製造方法。After winding the one separator around the entire circumference of the winding shaft having a flat cross section, the anode foil or the cathode foil is placed on the winding shaft, and the winding shaft is half-rotated to make the cathode on the winding shaft. By repeating the step of placing the foil or anode foil and the step of placing the anode foil or cathode foil on the winding shaft by half-rotating the winding shaft, the plurality of anode foils and cathode foils are formed in a flat spiral shape. A method for manufacturing a multilayer capacitor, wherein the single separator is formed so as to be opposed to each other with the single separator interposed therebetween. 陽極箔および陰極箔はセパレータの一側面から突出する電極タブをそれぞれ有し、電極タブは陽極箔および陰極箔と一体に形成されていることを特徴とする請求項１記載の積層型コンデンサの製造方法。Anode foil and the cathode foil have respective electrode tabs projecting from one side of the separator, electrode tabs manufacture of multilayer capacitor according to claim 1, characterized by being formed integrally with the anode foil and cathode foil Way . 陽極箔は、弁金属箔を陽極酸化して形成されることを特徴とする請求項１記載の積層型コンデンサの製造方法。2. The method of manufacturing a multilayer capacitor according to claim 1, wherein the anode foil is formed by anodizing a valve metal foil. 陽極箔および陰極箔は、アルミニウム箔の表面に活性炭層からなる分極性電極層を形成してなることを特徴とする請求項１記載の積層型コンデンサの製造方法。2. The method for producing a multilayer capacitor according to claim 1, wherein the anode foil and the cathode foil are formed by forming a polarizable electrode layer comprising an activated carbon layer on the surface of an aluminum foil.
JP23900799A 1999-08-25 1999-08-25 Multilayer capacitor and manufacturing method thereof Expired - Fee Related JP4557099B2 (en)

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JPH1154388A (en) * 1997-07-30 1999-02-26 Honda Motor Co Ltd Electric double-layer capacitor
JPH1186877A (en) * 1997-09-10 1999-03-30 Fuji Elelctrochem Co Ltd Winding method for spiral electrode body

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177321A (en) * 1984-09-24 1986-04-19 日本ケミコン株式会社 Manufacture of capacitor element
JPH06275476A (en) * 1993-03-17 1994-09-30 Nippon Steel Corp Multilayer electrolytic capacitor
JPH1050555A (en) * 1996-07-31 1998-02-20 Honda Motor Co Ltd Capacitor
JPH1154388A (en) * 1997-07-30 1999-02-26 Honda Motor Co Ltd Electric double-layer capacitor
JPH1186877A (en) * 1997-09-10 1999-03-30 Fuji Elelctrochem Co Ltd Winding method for spiral electrode body

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