JP4424452B2 - Electric double layer capacitor and manufacturing method thereof - Google Patents

Electric double layer capacitor and manufacturing method thereof Download PDF

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Publication number
JP4424452B2
JP4424452B2 JP2000046618A JP2000046618A JP4424452B2 JP 4424452 B2 JP4424452 B2 JP 4424452B2 JP 2000046618 A JP2000046618 A JP 2000046618A JP 2000046618 A JP2000046618 A JP 2000046618A JP 4424452 B2 JP4424452 B2 JP 4424452B2
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Prior art keywords
electrode
metal foil
polarizable
winding
electric double
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JP2001237150A (en
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正行 森
敏和 竹田
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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 OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors

Abstract

PROBLEM TO BE SOLVED: To surely lead out a plurality of electrode tabs from the desired positions of the end face of a capacitor element. SOLUTION: Polarizable electrode layers are formed on both surface sides of a beltlike metallic foil, and the electrode bodies of an anode and a cathode are obtained while the electrode bodies of the anode and the cathode are wound so as to be superposed through a separator. The polarizable electrode layers formed on each metallic foil are removed during the winding of the electrode bodies, the electrode tabs are mounted on the metallic foil exposed by removal, and a plurality of the electrode tabs are fitted at arbitrary positions by continuing the winding of the electrode bodies.

Description

【０００１】
【発明の属する技術分野】
本発明は、金属箔の両面側に分極性電極層を設けている陽極及び陰極の電極体を巻回した電気二重層コンデンサおよびその製造方法に係り、特に、１枚の金属箔に対して複数の電極タブを取付けるようにした電気二重層コンデンサおよびその製造方法に関する。
【０００２】
【従来の技術】
電気二重層コンデンサのコンデンサ素子は、たとえば、図３に示すような電極タブ５を有した電極体１を陽極及び陰極分の二枚用意し、それぞれを図示しないセパレータを介して重ね合せるように巻回したものである。
【０００３】
電極体１は、アルミニウム等の金属箔２の両面側に分極性電極層３，４を設けたものである。これら分極性電極３，４は、活性炭の塗布や活性炭シートの貼付によって得られる。
【０００４】
上述した電極タブ５は、金属箔２に対し電気的に接続される必要があり、予め金属箔２にステッチ、超音波溶接及びコールドウェルド等の方法で接続されるようになっている。
【０００５】
そのため、予め金属箔２に電極タブ５を取付けた後、金属箔２の両面側に分極性電極層３，４が設けられるようになっている。
【０００６】
【発明が解決しようとする課題】
ところで、上述した電気二重層コンデンサのコンデンサ素子においては、１枚の金属箔２に対し複数の電極タブ５を取付けることがインピーダンス特性を向上させる上で有効である。
【０００７】
この場合、上述したように、予め金属箔２に複数の電極タブ５を取付け、金属箔２の両面側に分極性電極層３，４を設けて電極体１を得た後、それぞれを図示しないセパレータを介して重ね合せるように巻回することで、１枚の金属箔２に対し複数の電極タブ５を取付けることは可能である。
【０００８】
ところが、このような製造方法では、たとえば、図４に示すように、同極の電極タブ５，５ａ及び６，６ａのそれぞれ位置がズレてしまう。ここで、電極タブ５，５ａは、たとえば陽極側であり、電極タブ６，６ａは、たとえば陰極側である。
【０００９】
これは、金属箔２の両面側の分極性電極層３，４が弾力性を有していることから、巻回時のトルクの変動により、分極性電極層３，４が圧縮されて巻取られ、巻回後の径が変化することによるものである。
【００１０】
本発明は、前記問題点を解決するためになされたものであり、複数の電極タブをコンデンサ素子の端面の所望の位置より確実に引出すことができる電気二重層コンデンサおよびその製造方法を提供することを目的とする。
【００１１】
【課題を解決するための手段】
前記目的を達成するため、本発明に係る電気二重層コンデンサの製造方法は、帯状の金属箔の両面側に分極性電極層を形成して陽極及び陰極の電極体を得る工程と、前記陽極及び陰極の電極体をセパレータを介して重ね合せるように巻回する工程と、前記電極体の巻回の途中で、それぞれの分極性電極層の対応する一部を除去する工程と、前記除去によって露出された金属箔に電極タブを取着する工程と、電極タブを取付けた後、前記電極体の巻回を続行させる工程とからなることを特徴とする。
【００１２】
分極性電極層を除去する際は、電極タブとの位置が重なり合う部分を削り取ることが好ましい。
また、電極タブの一部を、分極性電極層を形成する前に予め金属箔の側面に取着することもできる。
【００１５】
【発明の実施の形態】
以下、本発明の実施の形態について説明する。なお、以下に説明する図において、図３及び図４と共通する部分には同一符号を付すものとする。
【００１６】
図１は、本発明の電気二重層コンデンサの製造方法の一実施の形態を示す図、図２は、図１の電気二重層コンデンサの製造方法によって得られるコンデンサ素子を示す平面図である。
【００１７】
図１は、説明の便宜上、陽極又は陰極の何れか一方の電極体１を巻回する場合を示している。実際には、電極体１を陽極及び陰極分の二枚用意し、それぞれを図示しないセパレータを介して重ね合せるように巻回されるものである。
【００１８】
電極体１は、アルミニウム等の金属箔２の両面側に分極性電極層３，４を設けたものである。これら分極性電極３，４は、活性炭の塗布や活性炭シートの貼付によって得られる。
【００１９】
電極タブ５は、金属箔２に対し電気的に接続される必要があり、予めまたは分極性電極層３，４の対応する部分を一部除去して露出された金属箔２にステッチ、超音波溶接及びコールドウェルド等の方法で接続される。
【００２０】
そして、電極体１が巻回された途中で、金属箔２の上に形成された分極性電極層３，４を除去し、金属箔２の露出部分２ａを形成し、電極タブ５ａを取付ける。
【００２１】
ここで、分極性電極層３，４を除去する場合、たとえば、電極タブ５ａの取付け位置と、既に取付けられている電極タブ５との位置が重なり合う部分を削り取るようにする。次いで、金属箔２の露出部分２ａに電極タブ５ａを取付ける。
【００２２】
これにより、巻回時のトルクの変動によって、分極性電極層３，４が圧縮されて巻取られ、巻回後の径が変化する場合であっても、電極タブ５と電極タブ５ａとの位置合わせが容易に行われる。
【００２３】
このように、金属箔２の露出部分２ａに電極タブ５ａを取付けた後、電極体１の巻回を続行させることで、たとえば、図２に示すように、同極の電極タブ５，５ａ及び６，６ａのそれぞれが重なり合う位置に配置されたコンデンサ素子１Ａが得られる。
【００２４】
このように、本実施の形態では、帯状のそれぞれの金属箔２の片面側に電極タブ５を取付け、それぞれの金属箔２の両面側に分極性電極層３，４を形成して陽極及び陰極の電極体１を得るとともに、陽極及び陰極の電極体１をセパレータを介して重ね合せるように巻回し、電極体１の巻回の途中で、それぞれの金属箔２に形成された分極性電極層３，４を除去し、除去によって露出された金属箔２に電極タブ５ａ，６ａを取付けた後、電極体１の巻回を続行させることで、複数の電極タブ５，５ａ，６，６ａを任意の対応する位置に取付けることができる。
【００２５】
また、分極性電極層３，４を除去する場合、たとえば電極タブ５ａの取付け位置と、既に取付けられている電極タブ５との位置が重なり合う部分を削り取るようにし、金属箔２の露出部分２ａに電極タブ５ａを取付けるようにしたので、巻回時のトルクの変動により、分極性電極層３，４が圧縮されて巻取られ、巻回後の径が変化する場合であっても、電極タブ５，６と電極タブ５ａ，６ａとの位置合わせを容易に行うことができる。
【００２６】
このようなことから、複数の電極タブ５，５ａ，６，６ａをコンデンサ素子１Ａの端面の所望の位置より確実に引出すことができる。
【００２７】
【発明の効果】
以上説明したように、本発明によれば、それぞれの金属箔の両面側に分極性電極層を形成して陽極及び陰極の電極体を得るとともに、陽極及び陰極の電極体をセパレータを介して重ね合せるように巻回し、電極体の巻回の途中で、それぞれの金属箔に形成された分極性電極層を除去し、除去によって露出された金属箔に第２の電極タブを取付けた後、電極体の巻回を続行させることで、第１及び第２の電極タブを任意の位置に取付けるようにしたので、複数の電極タブをコンデンサ素子の端面の所望の位置より確実に引出すことができる。
【図面の簡単な説明】
【図１】本発明の電気二重層コンデンサの製造方法の一実施の形態を示す図である。
【図２】図１の電気二重層コンデンサの製造方法によって得られるコンデンサ素子を示す平面図である。
【図３】従来のコンデンサ素子を形成する電極体を示す断面図である。
【図４】図３の電極体を巻回して得られるコンデンサ素子を示す平面図である。
【符号の説明】
１ 電極体
１Ａ コンデンサ素子
２ 金属箔
３，４ 分極性電極層
５，５ａ，６，６ａ 電極タブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric double layer capacitor in which electrode bodies of an anode and a cathode provided with polarizable electrode layers on both sides of a metal foil are wound, and a method for manufacturing the same. The present invention relates to an electric double layer capacitor to which an electrode tab is attached and a manufacturing method thereof.
[0002]
[Prior art]
As the capacitor element of the electric double layer capacitor, for example, two electrode bodies 1 each having an electrode tab 5 as shown in FIG. 3 are prepared for an anode and a cathode, and are wound so as to overlap each other via a separator (not shown). It is a turn.
[0003]
The electrode body 1 is obtained by providing polarizable electrode layers 3 and 4 on both sides of a metal foil 2 such as aluminum. These polarizable electrodes 3 and 4 are obtained by applying activated carbon or sticking an activated carbon sheet.
[0004]
The electrode tab 5 described above needs to be electrically connected to the metal foil 2 and is connected to the metal foil 2 in advance by a method such as stitching, ultrasonic welding, or cold welding.
[0005]
Therefore, after attaching the electrode tab 5 to the metal foil 2 in advance, the polarizable electrode layers 3 and 4 are provided on both sides of the metal foil 2.
[0006]
[Problems to be solved by the invention]
Incidentally, in the capacitor element of the electric double layer capacitor described above, it is effective to improve the impedance characteristics by attaching a plurality of electrode tabs 5 to one metal foil 2.
[0007]
In this case, as described above, a plurality of electrode tabs 5 are attached to the metal foil 2 in advance, the polarizable electrode layers 3 and 4 are provided on both sides of the metal foil 2, and the electrode body 1 is obtained. It is possible to attach a plurality of electrode tabs 5 to one metal foil 2 by winding so as to overlap each other via a separator.
[0008]
However, in such a manufacturing method, for example, as shown in FIG. 4, the positions of the electrode tabs 5, 5 a and 6, 6 a having the same polarity are shifted. Here, the electrode tabs 5 and 5a are on the anode side, for example, and the electrode tabs 6 and 6a are on the cathode side, for example.
[0009]
This is because the polarizable electrode layers 3 and 4 on both sides of the metal foil 2 have elasticity, so that the polarizable electrode layers 3 and 4 are compressed and wound by the fluctuation of torque during winding. This is because the diameter after winding changes.
[0010]
The present invention has been made to solve the above-described problems, and provides an electric double layer capacitor capable of reliably pulling out a plurality of electrode tabs from a desired position on an end face of a capacitor element, and a method for manufacturing the same. With the goal.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a method for manufacturing an electric double layer capacitor according to the present invention includes a step of forming polarizable electrode layers on both sides of a strip-shaped metal foil to obtain an anode and a cathode electrode body, A step of winding the electrode body of the cathode so as to overlap each other via a separator, a step of removing a corresponding part of each polarizable electrode layer in the middle of the winding of the electrode body, and exposure by the removal A step of attaching the electrode tab to the metal foil, and a step of continuing the winding of the electrode body after the electrode tab is attached.
[0012]
When removing the polarizable electrode layer, it is preferable to scrape off the portion where the position of the electrode tab overlaps.
Moreover, a part of electrode tab can also be previously attached to the side surface of metal foil before forming a polarizable electrode layer.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. Note that, in the drawings described below, the same reference numerals are given to portions common to FIGS. 3 and 4.
[0016]
FIG. 1 is a diagram showing an embodiment of a method for producing an electric double layer capacitor of the present invention, and FIG. 2 is a plan view showing a capacitor element obtained by the method for producing an electric double layer capacitor of FIG.
[0017]
FIG. 1 shows a case where the electrode body 1 of either the anode or the cathode is wound for convenience of explanation. Actually, two electrode bodies 1 for an anode and a cathode are prepared, and each is wound so as to overlap each other via a separator (not shown).
[0018]
The electrode body 1 is obtained by providing polarizable electrode layers 3 and 4 on both sides of a metal foil 2 such as aluminum. These polarizable electrodes 3 and 4 are obtained by applying activated carbon or sticking an activated carbon sheet.
[0019]
The electrode tab 5 needs to be electrically connected to the metal foil 2, and stitches or ultrasonic waves to the exposed metal foil 2 in advance or by partially removing the corresponding portions of the polarizable electrode layers 3 and 4. They are connected by a method such as welding and cold weld.
[0020]
Then, while the electrode body 1 is wound, the polarizable electrode layers 3 and 4 formed on the metal foil 2 are removed, the exposed portion 2a of the metal foil 2 is formed, and the electrode tab 5a is attached.
[0021]
Here, when the polarizable electrode layers 3 and 4 are removed, for example, a portion where the attachment position of the electrode tab 5a and the position of the already attached electrode tab 5 overlap is scraped off. Next, the electrode tab 5 a is attached to the exposed portion 2 a of the metal foil 2.
[0022]
Thereby, even if it is a case where polarizable electrode layers 3 and 4 are compressed and wound up by the change of torque at the time of winding, and the diameter after winding changes, electrode tab 5 and electrode tab 5a Positioning is easy.
[0023]
In this way, by attaching the electrode tab 5a to the exposed portion 2a of the metal foil 2, the electrode body 1 continues to be wound, for example, as shown in FIG. Capacitor element 1A arranged at a position where each of 6 and 6a overlaps is obtained.
[0024]
As described above, in this embodiment, the electrode tab 5 is attached to one side of each of the strip-shaped metal foils 2, and the polarizable electrode layers 3 and 4 are formed on both sides of each of the metal foils 2 to form the anode and the cathode. And the electrode body 1 of the anode and the cathode are wound so as to overlap each other via a separator, and the polarizable electrode layer formed on each metal foil 2 during the winding of the electrode body 1 3 and 4 are removed, and the electrode tabs 5a and 6a are attached to the metal foil 2 exposed by the removal, and then the winding of the electrode body 1 is continued, so that the plurality of electrode tabs 5, 5a, 6, and 6a are Can be installed in any corresponding position.
[0025]
When the polarizable electrode layers 3 and 4 are removed, for example, the portion where the electrode tab 5a is attached and the position where the electrode tab 5 is already attached is scraped off, and the exposed portion 2a of the metal foil 2 is removed. Since the electrode tab 5a is attached, even if the polarizable electrode layers 3 and 4 are compressed and wound due to torque fluctuation during winding, and the diameter after winding changes, the electrode tab 5 and 6 and the electrode tabs 5a and 6a can be easily aligned.
[0026]
For this reason, the plurality of electrode tabs 5, 5a, 6, 6a can be reliably pulled out from a desired position on the end face of the capacitor element 1A.
[0027]
【The invention's effect】
As described above, according to the present invention, polarizable electrode layers are formed on both sides of each metal foil to obtain anode and cathode electrode bodies, and the anode and cathode electrode bodies are overlapped via a separator. After the electrode body is wound, the polarizable electrode layer formed on each metal foil is removed and the second electrode tab is attached to the metal foil exposed by the removal. By continuing the winding of the body, the first and second electrode tabs are attached to arbitrary positions, so that the plurality of electrode tabs can be reliably pulled out from a desired position on the end face of the capacitor element.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a method for producing an electric double layer capacitor of the present invention.
2 is a plan view showing a capacitor element obtained by the method for manufacturing the electric double layer capacitor of FIG. 1. FIG.
FIG. 3 is a cross-sectional view showing an electrode body forming a conventional capacitor element.
4 is a plan view showing a capacitor element obtained by winding the electrode body of FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electrode body 1A Capacitor element 2 Metal foil 3, 4 Polarized electrode layer 5, 5a, 6, 6a Electrode tab

Claims (3)

帯状の金属箔の両面側に分極性電極層を形成して陽極及び陰極の電極体を得る工程と、前記陽極及び陰極の電極体をセパレータを介して重ね合せるように巻回する工程と、前記電極体の巻回の途中で、それぞれの分極性電極層の対応する一部を除去する工程と、前記除去によって露出された金属箔に電極タブを取着する工程と、電極タブを取付けた後、前記電極体の巻回を続行させる工程とからなる電気二重層コンデンサの製造方法。  Forming a polarizable electrode layer on both sides of a belt-shaped metal foil to obtain an anode and a cathode electrode body, winding the anode and cathode electrode bodies with a separator interposed therebetween, and During the winding of the electrode body, a step of removing a corresponding part of each polarizable electrode layer, a step of attaching an electrode tab to the metal foil exposed by the removal, and after attaching the electrode tab A process for producing an electric double layer capacitor comprising the step of continuing winding of the electrode body. 分極性電極層の除去は、電極タブが重なり合う部分を削り取ることにより行う請求項１記載の電気二重層コンデンサの製造方法。  2. The method for producing an electric double layer capacitor according to claim 1, wherein the polarizable electrode layer is removed by scraping off a portion where the electrode tabs overlap. 電極タブの一部を分極性電極層を形成する前に予め金属箔の側面に取着することからなる請求項１および２記載の電気二重層コンデンサの製造方法。  The method for producing an electric double layer capacitor according to claim 1 or 2, wherein a part of the electrode tab is previously attached to the side surface of the metal foil before the polarizable electrode layer is formed.
JP2000046618A 2000-02-23 2000-02-23 Electric double layer capacitor and manufacturing method thereof Expired - Fee Related JP4424452B2 (en)

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KR100619281B1 (en) 2004-07-13 2006-09-01 (주) 아모센스 Winding Type Capacitor
KR100967504B1 (en) * 2005-12-01 2010-07-07 파나소닉 주식회사 Wound electric double-layer capacitor
KR100774735B1 (en) 2006-02-14 2007-11-08 엘에스전선 주식회사 Connecting structure between electrode and lead, electric double layer capacitor having the same, and Manufacturing method for the capacitor
JP2008091585A (en) * 2006-09-30 2008-04-17 Nippon Chemicon Corp Electric double layer capacitor, and its manufacturing method
JP5078802B2 (en) * 2008-08-07 2012-11-21 ルビコン株式会社 Electric double layer capacitor and manufacturing method thereof
JP5735368B2 (en) * 2011-07-20 2015-06-17 ニチコン株式会社 Electric double layer capacitor
CN106531467B (en) * 2016-11-17 2018-05-11 深圳市诚捷智能装备股份有限公司 Brush paper tinsel apparatus for ash and brush paper tinsel ash method

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