JP2000243670A - Electrical double-layer capacitor and manufacture of the same - Google Patents
Electrical double-layer capacitor and manufacture of the sameInfo
- Publication number
- JP2000243670A JP2000243670A JP11038377A JP3837799A JP2000243670A JP 2000243670 A JP2000243670 A JP 2000243670A JP 11038377 A JP11038377 A JP 11038377A JP 3837799 A JP3837799 A JP 3837799A JP 2000243670 A JP2000243670 A JP 2000243670A
- Authority
- JP
- Japan
- Prior art keywords
- metal case
- layer capacitor
- double layer
- current collecting
- electric double
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は各種電子機器に利用
される電気二重層コンデンサおよびその製造方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double layer capacitor used for various electronic devices and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来のこの種の電気二重層コンデンサに
ついて図６，図７を用いて説明する。2. Description of the Related Art A conventional electric double layer capacitor of this type will be described with reference to FIGS.
【０００３】図６は電気二重層コンデンサを構成する巻
回部材の構成を示した展開斜視図であり、同図におい
て、３ａと３ｂは一対の電極であり、この一対の電極３
ａと３ｂは、夫々金属箔もしくは導電性高分子からなる
集電体上に、集電体の露出部分２ａ，２ｂが形成される
ようにして活性炭と結着剤と導電剤の混合物からなる分
極性電極層を形成したものである。４はセパレータであ
り、上記一対の電極３ａと３ｂ間に介在させて巻回する
ことにより巻回部材１が構成されている。FIG. 6 is an exploded perspective view showing the structure of a winding member constituting an electric double layer capacitor. In FIG. 6, reference numerals 3a and 3b denote a pair of electrodes.
a and 3b are each made of a mixture of activated carbon, a binder and a conductive agent such that exposed portions 2a and 2b of the current collector are formed on a current collector made of a metal foil or a conductive polymer, respectively. This is one in which a polar electrode layer is formed. Reference numeral 4 denotes a separator, which is wound between the pair of electrodes 3a and 3b to form a winding member 1.
【０００４】図７は上記巻回部材１を用いた従来の電気
二重層コンデンサの構成を示した断面図であり、同図に
おいて、５ａと５ｂは夫々外部接続用端子６ａと６ｂを
備えて上記巻回部材１の集電体の露出部分２ａと２ｂに
電気的に接続されるようにして巻回部材１に夫々接合さ
れた集電部材、２０は上記巻回部材１を収納する有底円
筒状の金属ケース、８は封口部材、９ａと９ｂはナッ
ト、１０ａと１０ｂはＯリング、１１は封口用のＯリン
グである。FIG. 7 is a sectional view showing the structure of a conventional electric double-layer capacitor using the winding member 1. In FIG. 7, reference numerals 5a and 5b denote external connection terminals 6a and 6b, respectively. A current collecting member joined to the winding member 1 so as to be electrically connected to the exposed portions 2a and 2b of the current collector of the winding member 1, and a bottomed cylinder 20 for housing the winding member 1 A metal case, 8 is a sealing member, 9a and 9b are nuts, 10a and 10b are O-rings, and 11 is an O-ring for sealing.
【０００５】このように、従来の電気二重層コンデンサ
は、巻回部材１に接合された集電部材５ａ，５ｂを介し
てナット９ａ，９ｂにより巻回部材１を金属ケース２０
内に固定するように構成されたものであった。As described above, in the conventional electric double layer capacitor, the winding member 1 is fixed to the metal case 20 by the nuts 9a and 9b via the current collecting members 5a and 5b joined to the winding member 1.
It was configured to be fixed inside.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら上記従来
の電気二重層コンデンサの構成では、金属ケース２０内
の巻回部材１の固定は、巻回部材１に接合された集電部
材５ａと５ｂに設けられた外部接続用端子６ａと６ｂに
ナット９ａと９ｂを夫々締め付けることによって行われ
ているのみであるため、電気二重層コンデンサに大きな
振動が加わった場合、巻回部材１の外周面と金属ケース
２０の内周面との間に隙間があるために巻回部材１に振
動が加わり、この結果、巻回部材１の集電体の露出部分
２ａ，２ｂと集電部材５ａ，５ｂとの接続部がズレた
り、また最悪の場合には巻回部材１と集電部材５ａ，５
ｂとの接合が外れたりすることも発生し、耐振性に対し
て十分な保証をすることが難しいという課題を有してい
た。However, in the structure of the conventional electric double layer capacitor, the winding member 1 in the metal case 20 is fixed to the current collecting members 5a and 5b joined to the winding member 1. Since only the nuts 9a and 9b are tightened to the external connection terminals 6a and 6b, respectively, when a large vibration is applied to the electric double layer capacitor, the outer peripheral surface of the winding member 1 and the metal case Since there is a gap between the winding member 1 and the inner peripheral surface of the winding member 20, vibration is applied to the winding member 1, and as a result, the connection between the exposed portions 2a and 2b of the current collector of the winding member 1 and the current collecting members 5a and 5b In the worst case, the winding member 1 and the current collecting members 5a, 5
There is also a problem that the joint with b may be detached, and it is difficult to sufficiently guarantee the vibration resistance.
【０００７】本発明はこのような従来の課題を解決し、
耐振性に優れた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ものである。The present invention solves such a conventional problem,
An object of the present invention is to provide an electric double layer capacitor excellent in vibration resistance and a method for manufacturing the same.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に本発明は、巻回部材を収納した金属ケースの外周面に
環状の絞り成形を行い、この絞り成形部の内周面が巻回
部材の外周面と当接するようにしたものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, an annular drawing is performed on an outer peripheral surface of a metal case accommodating a winding member, and the inner peripheral surface of the drawn forming portion is wound. It comes into contact with the outer peripheral surface of the member.
【０００９】この本発明により、金属ケース内の巻回部
材の固定は、巻回部材の両端に加えて外周面も固定する
ことができるようになるため、振動に対する強度を大き
く向上させることができる。According to the present invention, the winding member in the metal case can be fixed not only at both ends of the winding member but also at the outer peripheral surface, so that the strength against vibration can be greatly improved. .
【００１０】[0010]
【発明の実施の形態】本発明の請求項１に記載の発明
は、金属箔もしくは導電性高分子からなる集電体上に集
電体の露出部分が形成されるように活性炭と結着剤と導
電剤の混合物からなる分極性電極層を形成してなる一対
の電極をその間にセパレータを介在させて巻回すること
により構成された巻回部材と、この巻回部材の端面の少
なくとも一方の面の集電体の露出部分に接合された集電
部材と、上記巻回部材を電解液と共に収納する筒状の金
属ケースと、この金属ケースの開口部を封止する封口部
材からなり、上記金属ケースの外周面に環状の絞り加工
を施すことにより絞り加工部分の金属ケースの内周面が
上記巻回部材の外周面と当接するようにした構成のもの
で、この構成によれば、巻回部材は金属ケースの内部で
自由度がないように固定されているため、振動に対して
の強度を向上させることができ、これにより、巻回部材
の端面の集電体の露出部分と集電部材のずれ、あるいは
接合外れによる電気二重層コンデンサの内部抵抗上昇、
ショート及びオープンという不具合を防ぐことができ
る。また、例えば電気二重層コンデンサを直並列に密に
配置したバンクとして使用する際、数十Ａ以上のレベル
の電流で電気二重層コンデンサのバンクに対し繰り返し
充放電を行うと電気二重層コンデンサの内部で発熱が生
じるが、本発明では金属ケースの内周面が直接巻回部材
の外周面と当接しているため、外部への大きな放熱効果
が得られるという作用を有する。BEST MODE FOR CARRYING OUT THE INVENTION According to the first aspect of the present invention, activated carbon and a binder are used so that an exposed portion of a current collector is formed on a current collector made of a metal foil or a conductive polymer. And a winding member formed by winding a pair of electrodes formed of a mixture of a conductive agent and a polarizable electrode layer with a separator interposed therebetween, and at least one of the end faces of the winding member A current collecting member joined to the exposed portion of the current collector on the surface, a cylindrical metal case for storing the winding member together with the electrolytic solution, and a sealing member for sealing an opening of the metal case; By applying an annular drawing process to the outer peripheral surface of the metal case, the inner peripheral surface of the metal case in the drawn portion comes into contact with the outer peripheral surface of the winding member. The turning member has no degree of freedom inside the metal case Therefore, the strength of the electric double-layer capacitor can be improved due to the displacement of the exposed portion of the current collector on the end face of the winding member and the current collecting member, or the disconnection of the current collecting member. Internal resistance rise,
Short circuit and open circuit can be prevented. Further, for example, when the electric double layer capacitor is used as a bank densely arranged in series and parallel, if the bank of the electric double layer capacitor is repeatedly charged and discharged with a current of several tens of A or more, the inside of the electric double layer capacitor becomes However, in the present invention, since the inner peripheral surface of the metal case is in direct contact with the outer peripheral surface of the winding member, an effect of obtaining a large heat radiation effect to the outside is obtained.
【００１１】請求項２に記載の発明は、請求項１に記載
の発明において、有底筒状の金属ケースを用い、巻回部
材の集電部材が接合されていない側の面の集電体の露出
部分を上記金属ケースの内底面に接合した構成のもので
あり、この構成によれば、有底筒状の金属ケースの内底
面に直接巻回部材の端面の集電体の露出部分が接続され
るために部品点数が少なくなり、これにより、工数の低
減による生産性の向上及びコストダウンが可能となる。
また、外部への大きな放熱効果が得られるという作用を
有する。According to a second aspect of the present invention, in the first aspect of the present invention, a current collector is provided on a surface of the winding member on the side where the current collecting member is not joined, using a bottomed cylindrical metal case. According to this configuration, the exposed portion of the current collector on the end surface of the winding member is directly connected to the inner bottom surface of the bottomed cylindrical metal case. Since the connection is made, the number of parts is reduced, thereby improving productivity and reducing costs by reducing man-hours.
Further, it has an effect that a large heat radiation effect to the outside can be obtained.
【００１２】請求項３に記載の発明は、請求項１または
２に記載の発明において、集電部材に外部接続用端子を
設けた構成としたもので、この構成によれば、集電部材
と外部接続用端子が一体となっているために部品点数が
少なくなり、これにより、工数の低減による生産性の向
上及びコストダウンが可能になるという作用を有する。According to a third aspect of the present invention, in the first or second aspect of the present invention, the current collecting member is provided with an external connection terminal. Since the external connection terminals are integrated, the number of components is reduced, which has the effect of improving productivity and reducing costs by reducing man-hours.
【００１３】請求項４に記載の発明は、請求項１〜３の
いずれか一つに記載の発明において、集電部材と封口部
材を一体で構成したもので、この構成によれば部品点数
が少なくてすみ、これにより工数の低減による生産性の
向上及びコストダウンが可能となる。また、金属ケース
の内部のデッドスペースが小さくなるため高容量密度化
が可能となる。また、巻回部材の端面の集電体の露出部
分の上面、底面ともに直接外部に接する金属と接してい
るために大きな放熱効果が得られるという作用を有す
る。According to a fourth aspect of the present invention, in the first aspect of the present invention, the current collecting member and the sealing member are integrally formed, and according to this configuration, the number of parts is reduced. It is possible to reduce the number of processes, thereby improving productivity and reducing costs by reducing the number of steps. Further, since the dead space inside the metal case is reduced, it is possible to increase the capacity density. In addition, since both the upper surface and the bottom surface of the exposed portion of the current collector on the end surface of the winding member are in contact with the metal directly in contact with the outside, a large heat radiation effect can be obtained.
【００１４】請求項５に記載の発明は、請求項４に記載
の発明において、封口部材と一体化された集電部材の外
周部を金属ケースの開放端と同時にカーリング加工する
ことによって金属ケースの開口部を封止するようにした
構成のもので、この構成によれば部品点数が少なくてす
み、これにより、工数の低減による生産性の向上及びコ
ストダウンが可能となる。また、金属ケースの内部のデ
ッドスペースが小さくなるために高容量密度化が可能と
なる。また、巻回部材の端面の集電体の露出部分の上
面、底面ともに直接外部に接する金属と接しているため
に大きな放熱効果が得られるという作用を有する。According to a fifth aspect of the present invention, in the invention of the fourth aspect, the outer peripheral portion of the current collecting member integrated with the sealing member is curled at the same time as the open end of the metal case. The configuration is such that the opening is sealed. According to this configuration, the number of components can be reduced, thereby improving productivity and reducing costs by reducing man-hours. In addition, since the dead space inside the metal case is reduced, a higher capacity density can be achieved. In addition, since both the upper surface and the bottom surface of the exposed portion of the current collector on the end surface of the winding member are in contact with the metal directly in contact with the outside, a large heat radiation effect can be obtained.
【００１５】請求項６に記載の発明は、請求項１〜５の
いずれか一つに記載の発明の電気二重層コンデンサの製
造方法において、金属ケースの外周面に施す環状の絞り
加工を、巻回部材を金属ケース内に挿入し、この金属ケ
ースの開口部を封止する前もしくは封止後のいずれかに
行うようにしたものであり、この製造方法によれば、巻
回部材の径のばらつきによらず金属ケースの内周面が巻
回部材の外周面と確実に強く当接させることができる。
また、金属ケースの外周面に施す環状の絞り加工を巻回
部材を金属ケース内に挿入し、この金属ケースの開口部
を封止する前に行った場合には、巻回部材のセンター出
しが確実に、また容易に行うことができるようになると
いう作用を有する。According to a sixth aspect of the present invention, in the method for manufacturing an electric double layer capacitor according to any one of the first to fifth aspects, the annular drawing process performed on the outer peripheral surface of the metal case is performed by winding. The winding member is inserted into the metal case, and is performed before or after sealing the opening of the metal case. According to this manufacturing method, the diameter of the winding member is reduced. The inner peripheral surface of the metal case can reliably and strongly contact the outer peripheral surface of the winding member regardless of the variation.
In addition, if the annular drawing process performed on the outer peripheral surface of the metal case is performed before the winding member is inserted into the metal case and the opening of the metal case is sealed, the centering of the winding member is performed. This has the effect that it can be performed reliably and easily.
【００１６】以下、本発明の実施の形態について、図１
〜図４を用いて説明する。Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.
【００１７】（実施の形態１）図１は本発明の第１の実
施の形態による電気二重層コンデンサの構成を示した断
面図であり、同図において１は巻回部材であり、この巻
回部材１は上記従来の技術の項で図５を用いて説明した
巻回部材１と同じものであるため、ここでの詳細な説明
は省略する。(Embodiment 1) FIG. 1 is a sectional view showing a configuration of an electric double layer capacitor according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a winding member. The member 1 is the same as the winding member 1 described with reference to FIG. 5 in the section of the related art, and a detailed description thereof will be omitted.
【００１８】５ａと５ｂは夫々外部接続用端子６ａと６
ｂを備えて上記巻回部材１の集電体の露出部分２ａと２
ｂに電気的に接続されるように巻回部材１に夫々接合さ
れた集電部材、７は上記巻回部材１を収納する有底円筒
状の金属ケース、７ａはこの金属ケース７の外周面に設
けた円環状の絞り加工部、８は封口部材、９ａと９ｂは
ナット、１０ａと１０ｂはＯリング、１１は封口用のＯ
リングである。Reference numerals 5a and 5b denote external connection terminals 6a and 6b, respectively.
b, the exposed portions 2a and 2 of the current collector of the winding member 1 are provided.
b, a current collecting member joined to the winding member 1 so as to be electrically connected to the metal member 7; a cylindrical metal case 7 for storing the winding member 1; and a peripheral surface 7a of the metal case 7 , 8 is a sealing member, 9a and 9b are nuts, 10a and 10b are O-rings, and 11 is an O for sealing.
It is a ring.
【００１９】このように本実施の形態による電気二重層
コンデンサは、巻回部材１に接合された集電部材５ａ，
５ｂを介してナット９ａ，９ｂにより巻回部材１を金属
ケース７内に固定し、さらに金属ケース７の外周面に設
けた円環状の絞り加工部７ａにより、この絞り加工部７
ａの内周面が巻回部材１の外周面と当接するように構成
されているため、巻回部材１は金属ケース７の内部で自
由度がないように固定されており、これにより、振動に
対する強度を大きく向上させることができ、巻回部材１
の端面の集電体の露出部分２ａ，２ｂと集電部材５ａ，
５ｂのずれあるいは外れによる電気二重層コンデンサの
内部抵抗上昇、ショート及びオープンという不具合を防
ぐことができる。また、例えば電気二重層コンデンサを
直並列に密に配置したバンクとして使用する際、数十Ａ
以上のレベルの電流で電気二重層コンデンサのバンクに
対し繰り返し充放電を行うと電気二重層コンデンサ内部
で発熱が生じるが、本発明では金属ケース７の内周面が
直接巻回部材１の外周面と当接しているため、外部への
大きな放熱効果が得られるという効果も有するものであ
る。As described above, the electric double layer capacitor according to the present embodiment includes the current collecting members 5a,
The winding member 1 is fixed in the metal case 7 by nuts 9a and 9b via the nut 5b, and furthermore, the drawn portion 7a is provided by an annular drawn portion 7a provided on the outer peripheral surface of the metal case 7.
Since the inner peripheral surface of a is configured to be in contact with the outer peripheral surface of the winding member 1, the winding member 1 is fixed so as to have no degree of freedom inside the metal case 7. The strength of the winding member 1 can be greatly improved.
The exposed portions 2a and 2b of the current collector on the end face of the
It is possible to prevent problems such as an increase in the internal resistance of the electric double layer capacitor, a short circuit, and an open circuit due to the displacement or disconnection of 5b. Further, for example, when an electric double layer capacitor is used as a bank densely arranged in series and parallel,
When the bank of the electric double layer capacitor is repeatedly charged and discharged with the current of the above level, heat is generated inside the electric double layer capacitor, but in the present invention, the inner peripheral surface of the metal case 7 is directly connected to the outer peripheral surface of the winding member 1. Because of this, there is also an effect that a large heat radiation effect to the outside can be obtained.
【００２０】（実施の形態２）以下、本発明の第２の実
施の形態について図面を用いて説明する。(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
【００２１】図２は本実施の形態による電気二重層コン
デンサの構成を示す断面図であり、本実施の形態は上記
第１の実施の形態の集電部材を巻回部材の一方だけに接
合し、集電部材が接合されていない側の巻回部材の集電
体の露出部分を金属ケースの内底面に接合した構成とし
たものであり、これ以外の構成は第１の実施の形態と同
じであるため、同一部分には同一符号を付与して詳細な
説明は省略し、異なる部分についてのみ説明する。FIG. 2 is a sectional view showing the structure of the electric double layer capacitor according to the present embodiment. In this embodiment, the current collecting member of the first embodiment is joined to only one of the winding members. The structure is such that the exposed portion of the current collector of the winding member on the side where the current collecting member is not joined is joined to the inner bottom surface of the metal case, and other configurations are the same as those of the first embodiment. Therefore, the same portions are denoted by the same reference numerals, detailed description thereof will be omitted, and only different portions will be described.
【００２２】図２において、１は巻回部材であり、この
巻回部材１の一方の集電体の露出部分２ａには上記第１
の実施の形態と同様に外部接続用端子６ａを備えた集電
部材５ａが接合されて金属ケース７に固定されている
が、巻回部材１の他方の集電体の露出部分２ｂは金属ケ
ース７の内底面に直接接合されているものである。In FIG. 2, reference numeral 1 denotes a winding member, and the exposed portion 2a of one current collector of the winding member 1 has the first
The current collecting member 5a having the external connection terminal 6a is joined and fixed to the metal case 7 in the same manner as in the embodiment, but the exposed portion 2b of the other current collector of the winding member 1 is 7 are directly joined to the inner bottom surface.
【００２３】従って、このような構成にすることによ
り、部品点数が少なくなって組み立て工数が低減し、コ
ストダウンと生産性の向上を図ることができるものであ
る。Therefore, by adopting such a configuration, the number of parts is reduced, the number of assembling steps is reduced, and the cost can be reduced and the productivity can be improved.
【００２４】（実施の形態３）以下、本発明の第３の実
施の形態について図面を用いて説明する。(Embodiment 3) Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.
【００２５】図３は本実施の形態による電気二重層コン
デンサの構成を示す断面図であり、本実施の形態は上記
第１または第２の実施の形態の集電部材と外部接続用端
子を一体で構成したものであり、これ以外の構成は第１
または第２の実施の形態と同じであるため、同一部分に
は同一符号を付与して詳細な説明は省略し、異なる部分
についてのみ説明する。FIG. 3 is a sectional view showing the structure of an electric double layer capacitor according to the present embodiment. In this embodiment, the current collecting member of the first or second embodiment and an external connection terminal are integrated. The other configuration is the first
Alternatively, since the configuration is the same as that of the second embodiment, the same reference numerals are given to the same portions, detailed description is omitted, and only different portions are described.
【００２６】図３において、１２は集電部材であり、こ
の集電部材１２は外部接続用端子１２ａを一体で設けた
構成としており、これにより、部品点数と組み立て工数
を削減し、コストダウンと生産性の向上を図ることがで
きるものである。In FIG. 3, reference numeral 12 denotes a current collecting member, and the current collecting member 12 has a structure in which an external connection terminal 12a is integrally provided, thereby reducing the number of parts and the number of assembling steps, reducing cost. The productivity can be improved.
【００２７】（実施の形態４）以下、本発明の第４の実
施の形態について図面を用いて説明する。(Embodiment 4) Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings.
【００２８】図４は本実施の形態による電気二重層コン
デンサの構成を示す断面図であり、本実施の形態は上記
第１〜第３の実施の形態の集電部材と封口部材を一体で
構成したものであり、これ以外の構成は第１〜第３の実
施の形態と同じであるため、同一部分には同一符号を付
与して詳細な説明は省略し、異なる部分についてのみ説
明する。FIG. 4 is a sectional view showing the structure of an electric double layer capacitor according to the present embodiment. In this embodiment, the current collecting member and the sealing member of the first to third embodiments are integrally formed. Since other configurations are the same as those of the first to third embodiments, the same portions are denoted by the same reference numerals, detailed description is omitted, and only different portions will be described.
【００２９】図４において、１３は封口部材を兼ねた集
電部材、１４ａと１４ｂは外部接続用端子、１５は絶縁
部材であり、この絶縁部材１５は上記封口部材を兼ねた
集電部材１３と金属ケース７との接触によるショートを
防止するために必要となるものである。In FIG. 4, 13 is a current collecting member also serving as a sealing member, 14a and 14b are terminals for external connection, 15 is an insulating member, and the insulating member 15 is provided with the current collecting member 13 also serving as the sealing member. This is necessary to prevent a short circuit due to contact with the metal case 7.
【００３０】このように本実施の形態による電気二重層
コンデンサは、封口部材を兼ねた集電部材１３を使用し
ているために部品点数が少なくてすみ、これにより、工
数の低減による生産性の向上及びコストダウンが可能と
なる。また、金属ケース７の内部のデッドスペースが小
さくなるために高容量密度化が可能となる。また、巻回
部材１の端面の集電体の露出部分２ａ，２ｂの上面、底
面ともに直接外部に接する金属と接しているため、大き
な放熱効果が得られるものである。As described above, since the electric double layer capacitor according to the present embodiment uses the current collecting member 13 also serving as the sealing member, the number of parts can be reduced, and thus the productivity can be reduced by reducing the number of steps. Improvement and cost reduction are possible. Further, since the dead space inside the metal case 7 is reduced, it is possible to increase the capacity density. Further, since both the upper surface and the lower surface of the exposed portions 2a and 2b of the current collector on the end surface of the winding member 1 are in contact with the metal directly in contact with the outside, a large heat radiation effect can be obtained.
【００３１】（実施の形態５）以下、本発明の第５の実
施の形態について図面を用いて説明する。(Embodiment 5) Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings.
【００３２】図５は本実施の形態による電気二重層コン
デンサの構成を示す断面図であり、本実施の形態は上記
第４の実施の形態の封口部材を兼ねた集電部材の外周部
を金属ケースの開口端と同時にカーリング加工すること
によって金属ケースの開口部を封止するようにした構成
のものであり、これ以外の構成は第４の実施の形態と同
じであるため、同一部分には同一符号を付与して詳細な
説明は省略し、異なる部分についてのみ説明する。FIG. 5 is a sectional view showing the structure of an electric double layer capacitor according to the present embodiment. In the present embodiment, the outer peripheral portion of the current collecting member also serving as a sealing member according to the fourth embodiment is made of metal. The configuration is such that the opening of the metal case is sealed by curling at the same time as the opening end of the case, and the other configuration is the same as that of the fourth embodiment. The same reference numerals are given and detailed description is omitted, and only different portions will be described.
【００３３】図５において、１６は金属ケース、１６ａ
は金属ケース１６に設けた円環状の絞り加工部、１７は
封口部材を兼ねた集電部材、１８は金属ケース側絶縁部
材、１９は集電部材側絶縁部材を示し、この金属ケース
側絶縁部材１８と集電部材側絶縁部材１９は、封口部材
を兼ねた集電部材１７と金属ケース１６の接触によるシ
ョートを防止するために必要となるものである。In FIG. 5, 16 is a metal case, 16a
Is an annular drawn portion provided on the metal case 16, 17 is a current collecting member also serving as a sealing member, 18 is a metal case side insulating member, 19 is a current collecting member side insulating member, and the metal case side insulating member is shown. 18 and the current-collecting-member-side insulating member 19 are necessary to prevent a short circuit caused by contact between the current-collecting member 17 also serving as a sealing member and the metal case 16.
【００３４】このように本実施の形態による電気二重層
コンデンサは、封口部材と一体化された集電部材１７の
外周部を金属ケース１６の開放端と同時にカーリング加
工することによって金属ケース１６の開口部を封止する
ようにして構成したもので、この構成によれば部品点数
が少なくてすみ、これにより、工数の低減による生産性
の向上、及びコストダウンが可能となる。また、金属ケ
ース１６の内部のデッドスペースが小さくなるために高
容量密度化が可能となる。また、巻回部材１の端面の集
電体の露出部分２ａ，２ｂの上面、底面ともに直接外部
に接する金属と接しているため、大きな放熱効果が得ら
れるものである。As described above, in the electric double layer capacitor according to the present embodiment, the outer peripheral portion of the current collecting member 17 integrated with the sealing member is curled at the same time as the open end of the metal case 16, thereby opening the metal case 16. The configuration is such that the parts are sealed, and according to this configuration, the number of parts can be reduced, thereby improving productivity and reducing costs by reducing man-hours. In addition, since the dead space inside the metal case 16 is reduced, it is possible to increase the capacity density. Further, since both the upper surface and the lower surface of the exposed portions 2a and 2b of the current collector on the end surface of the winding member 1 are in contact with the metal directly in contact with the outside, a large heat radiation effect can be obtained.
【００３５】[0035]
【発明の効果】以上のように本発明による電気二重層コ
ンデンサは、巻回部材を内部に収納した金属ケースの外
周面に環状の絞り加工を施すことにより、絞り加工部分
の金属ケースの内周面が巻回部材の外周面と当接するよ
うになるため、巻回部材は金属ケースの内部で自由度が
ない状態で固定され、これにより、振動に対しての強度
を大きく向上させることができ、巻回部材の端面の集電
体の露出部分と集電部材のずれあるいは外れによる電気
二重層コンデンサの内部抵抗上昇、ショート及びオープ
ンという不具合を防ぐことができるものである。As described above, in the electric double layer capacitor according to the present invention, the outer peripheral surface of the metal case in which the winding member is housed is subjected to the annular drawing process, whereby the inner peripheral portion of the metal case in the drawn portion is processed. Since the surface comes into contact with the outer peripheral surface of the winding member, the winding member is fixed without any degree of freedom inside the metal case, thereby greatly improving the strength against vibration. In addition, it is possible to prevent problems such as an increase in the internal resistance of the electric double layer capacitor, a short circuit, and an open circuit due to a displacement or separation of the current collector from the exposed portion of the current collector on the end face of the winding member.
【図１】本発明の第１の実施の形態による電気二重層コ
ンデンサの構成を示す断面図FIG. 1 is a sectional view showing a configuration of an electric double layer capacitor according to a first embodiment of the present invention.
【図２】本発明の第２の実施の形態による電気二重層コ
ンデンサの構成を示す断面図FIG. 2 is a sectional view showing a configuration of an electric double layer capacitor according to a second embodiment of the present invention.
【図３】本発明の第３の実施の形態による電気二重層コ
ンデンサの構成を示す断面図FIG. 3 is a sectional view showing a configuration of an electric double layer capacitor according to a third embodiment of the present invention.
【図４】本発明の第４の実施の形態による電気二重層コ
ンデンサの構成を示す断面図FIG. 4 is a sectional view showing a configuration of an electric double layer capacitor according to a fourth embodiment of the present invention.
【図５】本発明の第５の実施の形態による電気二重層コ
ンデンサの構成を示す断面図FIG. 5 is a sectional view showing a configuration of an electric double layer capacitor according to a fifth embodiment of the present invention.
【図６】本発明の一実施の形態を含む従来の電気二重層
コンデンサの巻回部材の構成を示す展開斜視図FIG. 6 is an exploded perspective view showing a configuration of a winding member of a conventional electric double layer capacitor including an embodiment of the present invention.
【図７】従来の電気二重層コンデンサの構成を示す断面
図FIG. 7 is a sectional view showing a configuration of a conventional electric double layer capacitor.
１ 巻回部材 ２ａ，２ｂ 集電体の露出部分 ５ａ，５ｂ 集電部材 ６ａ，６ｂ 外部接続用端子 ７ 金属ケース ７ａ 絞り加工部 ８ 封口部材 ９ａ，９ｂ ナット １０ａ，１０ｂ Ｏリング １１ 封口用のＯリング １２ 集電部材 １３ 集電部材 １４ａ，１４ｂ 外部接続用端子 １５ 絶縁部材 １６ 金属ケース １６ａ 絞り加工部 １７ 集電部材 １８ 金属ケース側絶縁部材 １９ 集電部材側絶縁部材 DESCRIPTION OF SYMBOLS 1 Winding member 2a, 2b Exposed part of current collector 5a, 5b Current collecting member 6a, 6b Terminal for external connection 7 Metal case 7a Drawing part 8 Sealing member 9a, 9b Nut 10a, 10b O-ring 11 O for sealing Ring 12 Current collecting member 13 Current collecting member 14a, 14b Terminal for external connection 15 Insulating member 16 Metal case 16a Drawing portion 17 Current collecting member 18 Metal case side insulating member 19 Current collecting member side insulating member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤原 誠 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 岡本 正史 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Makoto Fujiwara 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (6)
電体上に集電体の露出部分が形成されるように活性炭と
結着剤と導電剤の混合物からなる分極性電極層を形成し
てなる一対の電極をその間にセパレータを介在させて巻
回することにより構成された巻回部材と、この巻回部材
の端面の少なくとも一方の面の集電体の露出部分に接合
された集電部材と、上記巻回部材を電解液と共に収納す
る筒状の金属ケースと、この金属ケースの開口部を封止
する封口部材からなり、上記金属ケースの外周面に環状
の絞り加工を施すことにより絞り加工部分の金属ケース
の内周面が上記巻回部材の外周面と当接するようにした
電気二重層コンデンサ。1. A polarizable electrode layer made of a mixture of activated carbon, a binder and a conductive agent is formed on a current collector made of a metal foil or a conductive polymer so that an exposed portion of the current collector is formed. And a current collector joined to the exposed portion of the current collector on at least one of the end faces of the wound member, the pair of electrodes being wound with a separator interposed therebetween. Member, a cylindrical metal case for accommodating the winding member together with the electrolytic solution, and a sealing member for sealing the opening of the metal case, by subjecting the outer peripheral surface of the metal case to an annular drawing process An electric double layer capacitor in which an inner peripheral surface of a metal case in a drawn portion is in contact with an outer peripheral surface of the wound member.
の集電部材が接合されてない側の面の集電体の露出部分
を上記金属ケースの内底面に接合した請求項１に記載の
電気二重層コンデンサ。2. A metal case having a bottomed cylindrical shape, wherein an exposed portion of a current collector on a surface of the winding member on a side to which the current collecting member is not bonded is bonded to an inner bottom surface of the metal case. 3. The electric double layer capacitor according to claim 1.
項１または２に記載の電気二重層コンデンサ。3. The electric double layer capacitor according to claim 1, wherein an external connection terminal is provided on the current collecting member.
求項１〜３のいずれか一つに記載の電気二重層コンデン
サ。4. The electric double layer capacitor according to claim 1, wherein the current collecting member and the sealing member are integrally formed.
部を金属ケースの開放端と同時にカーリング加工するこ
とによって金属ケースの開口部を封止するようにした請
求項４に記載の電気二重層コンデンサ。5. The electric device according to claim 4, wherein an opening of the metal case is sealed by curling an outer peripheral portion of the current collecting member integrated with the sealing member simultaneously with an open end of the metal case. Double layer capacitor.
工を、巻回部材を金属ケース内に挿入し、この金属ケー
スの開口部を封止する前もしくは封止後のいずれかで行
うようにした請求項１〜５のいずれか一つに記載の電気
二重層コンデンサの製造方法。6. An annular drawing process to be performed on the outer peripheral surface of the metal case is performed before or after sealing the opening of the metal case by inserting the winding member into the metal case. The method for manufacturing an electric double layer capacitor according to any one of claims 1 to 5, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11038377A JP2000243670A (en) | 1999-02-17 | 1999-02-17 | Electrical double-layer capacitor and manufacture of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11038377A JP2000243670A (en) | 1999-02-17 | 1999-02-17 | Electrical double-layer capacitor and manufacture of the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000243670A true JP2000243670A (en) | 2000-09-08 |
Family
ID=12523600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11038377A Pending JP2000243670A (en) | 1999-02-17 | 1999-02-17 | Electrical double-layer capacitor and manufacture of the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000243670A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002110481A (en) * | 2000-09-29 | 2002-04-12 | Nippon Chemicon Corp | Capacitor |
| US6639786B2 (en) | 2001-07-11 | 2003-10-28 | Honda Giken Kogyo Kabushiki Kaisha | Cylindrical electric double-layer capacitor |
| JP2005340609A (en) * | 2004-05-28 | 2005-12-08 | Matsushita Electric Ind Co Ltd | Capacitor and manufacturing method thereof |
| JP2006173440A (en) * | 2004-12-17 | 2006-06-29 | Matsushita Electric Ind Co Ltd | Capacitor |
| US7843680B2 (en) | 2004-05-28 | 2010-11-30 | Panasonic Corporation | Capacitor and method of manufacturing the same |
| CN102723210A (en) * | 2012-06-25 | 2012-10-10 | 南通新三能电子有限公司 | Shock-resistant large aluminum electrolytic capacitor |
| CN102930994A (en) * | 2012-11-01 | 2013-02-13 | 海博瑞恩电子科技无锡有限公司 | High reliability electrochemical energy storage device vibration-proof structure |
| JP2013058346A (en) * | 2011-09-07 | 2013-03-28 | Gs Yuasa Corp | Power storage device |
| US8488301B2 (en) | 2011-02-28 | 2013-07-16 | Corning Incorporated | Ultracapacitor package design having slideably engagable bent tabs |
| CN103310983A (en) * | 2013-05-08 | 2013-09-18 | 佛山市三水日明电子有限公司 | Polymer solid aluminum electrolytic capacitor and manufacturing method thereof |
| JP2013239376A (en) * | 2012-05-16 | 2013-11-28 | Gs Yuasa Corp | Power storage element and power storage element manufacturing method |
| WO2020248936A1 (en) * | 2019-06-11 | 2020-12-17 | 安施新能源(成都)有限公司 | Electrochemical energy storage device |
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| JPH10275751A (en) * | 1997-03-31 | 1998-10-13 | Elna Co Ltd | Electric double layer capacitor and its manufacture |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002110481A (en) * | 2000-09-29 | 2002-04-12 | Nippon Chemicon Corp | Capacitor |
| US6639786B2 (en) | 2001-07-11 | 2003-10-28 | Honda Giken Kogyo Kabushiki Kaisha | Cylindrical electric double-layer capacitor |
| KR101023277B1 (en) * | 2004-05-28 | 2011-03-18 | 파나소닉 주식회사 | Capacitor and method of manufacturing the same |
| JP2005340609A (en) * | 2004-05-28 | 2005-12-08 | Matsushita Electric Ind Co Ltd | Capacitor and manufacturing method thereof |
| US7843680B2 (en) | 2004-05-28 | 2010-11-30 | Panasonic Corporation | Capacitor and method of manufacturing the same |
| JP2006173440A (en) * | 2004-12-17 | 2006-06-29 | Matsushita Electric Ind Co Ltd | Capacitor |
| JP4600028B2 (en) * | 2004-12-17 | 2010-12-15 | パナソニック株式会社 | Capacitor |
| US8488301B2 (en) | 2011-02-28 | 2013-07-16 | Corning Incorporated | Ultracapacitor package design having slideably engagable bent tabs |
| JP2013058346A (en) * | 2011-09-07 | 2013-03-28 | Gs Yuasa Corp | Power storage device |
| JP2013239376A (en) * | 2012-05-16 | 2013-11-28 | Gs Yuasa Corp | Power storage element and power storage element manufacturing method |
| CN102723210A (en) * | 2012-06-25 | 2012-10-10 | 南通新三能电子有限公司 | Shock-resistant large aluminum electrolytic capacitor |
| CN102930994A (en) * | 2012-11-01 | 2013-02-13 | 海博瑞恩电子科技无锡有限公司 | High reliability electrochemical energy storage device vibration-proof structure |
| CN103310983A (en) * | 2013-05-08 | 2013-09-18 | 佛山市三水日明电子有限公司 | Polymer solid aluminum electrolytic capacitor and manufacturing method thereof |
| WO2020248936A1 (en) * | 2019-06-11 | 2020-12-17 | 安施新能源(成都)有限公司 | Electrochemical energy storage device |
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