JP3995897B2 - Manufacturing method of electric double layer capacitor - Google Patents

Manufacturing method of electric double layer capacitor Download PDF

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JP3995897B2
JP3995897B2 JP2001095406A JP2001095406A JP3995897B2 JP 3995897 B2 JP3995897 B2 JP 3995897B2 JP 2001095406 A JP2001095406 A JP 2001095406A JP 2001095406 A JP2001095406 A JP 2001095406A JP 3995897 B2 JP3995897 B2 JP 3995897B2
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electrode
seal
electrodes
collector
double layer
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JP2002299191A (en
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英雄 小野
吉行 曽我
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UD Trucks Corp
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UD Trucks Corp
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    • 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
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    • Y02E60/13—Energy storage using capacitors

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  • Electric Double-Layer Capacitors Or The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、電気二重層キャパシタ（電気二重層コンデンサ）の製造方法に関する。
【０００２】
【従来の技術】
近年、各種の蓄電装置（電動車両の駆動電源など）として、急速充電が可能で充放電サイクル寿命の長い、電気二重層キャパシタの適用技術が注目される。
【０００３】
電気二重層キャパシタは、同数の正極体と負極体をこれらの間にセパレータを介在させて交互に積層して構成される。これらの積層体（キャパシタ本体）は電解液に浸され、容器に収容して密封される（特開平７−９４３７４号、参照）。
【０００４】
この発明は、このような電気二重層キャパシタの従来技術を踏まえつつ、電気二重層キャパシタの合理的な製造方法を提供することを目的とする。
【０００５】
【課題を解決するための手段】
第１の発明は、複数の正極体および負極体とこれらの間に介在するセパレータとから積層体に構成されるキャパシタ本体と、キャパシタ本体を電解液と共に収容して密封される容器と、を備える電気二重層キャパシタの製造方法において、キャパシタ本体を作成する工程は、金属箔の片面にシールを剥離容易な接着状態に貼付する工程と、この金属箔から型抜き加工により正極体および負極体の集電極をリード部と共に一体成形する工程と、集電極のリード部からその領域部分のシールを剥離する工程と、所定数の集電極を積層状態に組むと共にこれらリード部の同極同士を重ね合わせる結束状態に接合する工程と、積層状態の各集電極から残るシールを剥離する工程と、各集電極間に正極体の分極性電極と負極体の分極性電極とセパレータを介装する工程と、を備えてなり、金属箔の片面に剥離容易な接着状態に貼付されるシールについては、１対の分極性電極およびセパレータの厚さ分に相当する厚みに形成され、集電極の領域部分とリードの領域部分との境に切れ目が与えられることを特徴とする。
【００１０】
【発明の効果】
この発明においては、集電極は、金属箔（シール付き）から型抜き加工により、リード部を含めて容易かつ能率的に作成される。所定数の集電極は、これらリード部の結束部により一体化され、各集電極間に１組の分極性電極およびセパレータが介装される。これらの工程により、キャパシタ本体は合理的に作成され、電気二重層キャパシタを安価に供給できる。
【００１１】
型抜き加工時のバリなどは、シールの切断面に付着するので、これを剥離することにより、バリなどの除去を効果的に図れる。したがって、電気二重層キャパシタの内部において、バリなどの浮遊に起因する不具合（セパレータの損傷など）が防止され、品質の高い電気二重層キャパシタを安価に供給できるのである。
【００１２】
金属箔のシールは、型抜き加工後、集電極のリード部からその領域部分のシールが剥離され、集電極の領域部分のシールは残されるため、続く工程において、所定数の集電極を積層体に組むと、各集電極に残るシールにより、キャパシタ本体と同様の組み状態（各集電極間に１対の分極性電極およびセパレータが介装される積層状態）において、各リード部をこれらの結束状態に接合可能となる。各集電極に残るシールにより、集電極の積層位置によって異なるリード部の長さ（集電極との接続辺から結束部に至る距離）が自ずと調整されるので、リード部の同極同士の結束および接合を適正かつ能率よく処理できる。各集電極に残るシールは、続く工程に入る前に剥離され、その代わりに１対の分極性電極およびセパレータが介装されるため、その工程において、各集電極間への分極性電極およびセパレータの介装により、リード部に無理が掛かったり、皺が寄ったりするようなこともなくなる。
【００１５】
【発明の実施の形態】
図１において、１０はキャパシタ本体（図示せず）を電解液と共に収容する容器、１１は容器１０の外部に引き出される１対の端子板（キャパシタ電極）であり、各端子板１１ａ，１１ｂは容器１０の内部でそれぞれ対応する極性のリード部の重層部に接合される。
【００１６】
キャパシタ本体については、同数の正極体および負極体をこれらの間にセパレータを介在させて積層して構成される。各正極体および各負極体の集電極は、金属箔（たとえば、アルミ箔）で形成され、その両面（積層体の両端に位置する金属箔は片面）に活性炭電極（分極性電極）が構成される。これらの集電極にリード部が一体形成され、これら同極どうしの重層部に端子板１１ａ，１１ｂ（たとえば、アルミ電極）が接合されるのである。
【００１７】
キャパシタ本体は、電解液に浸して容器１０に納められる。容器１０は、金属の中間層を含む積層構造の樹脂フィルム（この例においては、アルミラミネート）から袋状に構成され、その一辺から１対の端子板１１ａ，１１ｂ（その一部）が引き出される。容器１０の内部は、真空引きにより、余分な電解液を抜き取りながら、真空状態において、熱シールにより密封される。
【００１８】
各端子板１１ａ，１１ｂには、樹脂フィルムとの融合性を補償するため、予め熱シール用の溶着剤（図示せず）が付着される。この溶着剤に接着剤を含むＰＥ（ポリエチレン）材が用いられる。袋１０（容器）の開口に熱シールを加えると、溶着剤は溶融し、端子板１１に樹脂フィルムを良好に溶着させる。
【００１９】
図２は、電気二重層キャパシタの製造工程（一部分）を説明するものであり、（ａ）において、所定数に重層する金属箔２０を型抜き加工（２２はその抜き型である）することにより、正極体および負極体の集電極２１は、同形同大に作成される。各集電極２１にその矩形平面の一辺に片側へ寄せてリード部（矩形突片）が一体形成される。この型抜き加工時に生じるバリ２３などは、各集電極から適宜な手法によって除去される。図３は、図２（ａ）の型抜き加工について、さらに補足的に説明する斜視図であり、図２（ａ）と同じ部位に同じ符号を付ける。２１ａは集電極２１のリード部を表す。
【００２０】
（ｂ）において、正極体の集電極と負極体の集電極２１が交互に重ね合わされ、所定数（正極体の集電極２１と負極体の集電極２１は同数）の積層体２１Ａに組成される。この積層体２１Ａは、同極どうしのリード部２１ａの重層部が結束状態に接合され、これら集電極２１の各積層間に１組ずつ活性炭電極（正極体の分極性電極と負極体の分極性電極）およびセパレータ（１対の活性炭電極の間に挟まれる）が介装される。
【００２１】
このような工程により、集電極２１の作成およびこれらの一体化が能率よく処理され、キャパシタ本体が合理的に構成され、電気二重層キャパシタを安価に供給できるようになる。製品としての電気二重層キャパシタは、電動車両の駆動電源に適用する場合、数多くを直並列に接続して所要容量の組電池に構成される。
【００２２】
キャパシタ本体は、同極どうしのリード部２１ａの結束部２４（接合部）に端子板１１ａ，１１ｂがさらに接合される形になり、既述のように密封される容器１０に収装されるのである。リード部２１ａどうしの接合およびその結束部２４と端子板１１ａ，１１ｂとの接合は、良好な導電性を確保しつつ、金属箔のリード部２１ａに損傷を与えないよう、超音波溶接・スポット溶接、などが用いられる。
【００２３】
図４は、別の実施形態において、電気二重層キャパシタの製造工程（一部分）を説明するものである。（ａ）において、金属箔２０の片面にシール２５が剥離容易な接着状態に貼付される。この金属箔（シール付き）を型抜き加工することにより、正極体および負極体の集電極２１は、同形同大に作成され、各集電極２１にその矩形平面の一辺に片側へ寄せてリード部（矩形突片）が一体形成される。
【００２４】
この型抜き加工時に生じるバリ２３などは、各シール２５の切断面に付着される。そのため、型抜き加工後にこれらシール２５をそれぞれ金属箔から剥離することにより、バリなどの除去が容易かつ効果的に処理できるのである。
【００２５】
その後、（ｂ）において、正極体の集電極と負極体の集電極２１が交互に重ねられ、所定数の積層体２１Ａに組成される。この積層体２１Ａは、同極どうしのリード部２１ａの重層部を結束状態に接合され、これら集電極２１の各積層間に１組ずつ活性炭電極およびセパレータが介装される。
【００２６】
このように金属箔２０に貼付のシール２５により、型抜き加工時のバリなどが容易かつ効果的に除去可能となる。したがって、電気二重層キャパシタの内部において、バリなどの浮遊に起因する不具合（セパレータの損傷など）も防止され、品質の高い電気二重層キャパシタを安価に供給できるようになる。
【００２７】
金属箔２０に貼付のシール２１については、集電極２１の一体化が適確かつ能率よく処理できるよう、スペーサ機能を持たせるため、１対の活性炭電極（正極体の分極性電極と負極体の分極性電極）およびセパレータ（１対の活性炭電極の間に挟まれる）の厚さ分に相当する厚みに設定される。また、集電極２１の領域とリード部２１ａの領域との境に切れ目がシールに与えられる。
【００２８】
リード部２１ａのシール部分は、（ｂ）の接合処理のため、その前に剥離される。（ｂ）において、所定数の集電極２１を積層状態に組むと、これら集電極２１のシール部分が各積層間に所定の間隔（スペース）を生じさせる。
【００２９】
具体的には、図５のように所定数の集電極２１は治具３０を用いて積層状態にセットされる。これら集電極２１のシール部分２５ａ（スペーサ）により、各積層間に１対の分極性電極およびセパレータの厚さ分の間隔を生じるので、キャパシタ本体（各集電極間に１対の分極性電極およびセパレータを介装する）と同様の組み状態において、接合機３１（たとえば、溶接機）により、各リード部２１ａがこれらの結束状態に接合可能となる。
【００３０】
各集電極２１のスペーサ２５ａにより、集電極２１の積層位置によって異なるリード部２１ａの長さ（集電極２１との接続辺から結束部２４に至る距離）が自ずと調整されるので、キャパシタ本体の組成時において、各リード部２１ａに無理が掛かったり、皺が寄ったりするようなこともなくなる。各集電極２１のスペーサ２５ａについては、キャパシタ本体の組成（各集電極間に１対の分極性電極およびセパレータを介装）する前に剥離される。
【００３１】
このようなスペーサ機能を金属箔２０のシール２５に設定することにより、所定数の集電極２１の一体化（リード部２１ａの接合）ばかりでなく、キャパシタ本体の組成についても、適正かつ能率よく処理できる。また、シール２５により、バリなどの除去も効果的に図れるため、電気二重層キャパシタの合理的な大量生産が可能となり、高品質の電気二重層キャパシタを安価に供給できるのである。
【００３２】
なお、バリなど除去用のシール２５にスペーサ２５ａを設定するのでなく、これらは単独に貼付するようにしてもよい。
【図面の簡単な説明】
【図１】この発明の実施形態を表す電気二重層キャパシタの斜視図である。
【図２】同じく製造工程の説明図である。
【図３】同じく型抜き処理の説明図である。
【図４】別の実施形態における製造工程の説明図である。
【図５】同じく集電極の一体化（リード部の接合）処理に係る説明図である。
【符号の説明】
２０ 金属箔（たとえば、アルミ箔）
２１ 集電極
２１Ａ 集電極の積層体
２１ａ リード部
２４ リード部の結束部（接合部）
２５ シール
２５ａ スペーサ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing an electric double layer capacitor (electric double layer capacitor) .
[0002]
[Prior art]
2. Description of the Related Art In recent years, as various power storage devices (such as a drive power source for an electric vehicle), attention has been focused on an application technology of an electric double layer capacitor that can be rapidly charged and has a long charge / discharge cycle life.
[0003]
An electric double layer capacitor is configured by alternately laminating the same number of positive and negative electrode bodies with separators interposed therebetween. These laminated bodies (capacitor main bodies) are immersed in an electrolytic solution, housed in a container, and sealed (see JP-A-7-94374).
[0004]
An object of this invention is to provide the rational manufacturing method of an electric double layer capacitor based on the prior art of such an electric double layer capacitor.
[0005]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a capacitor main body configured in a multilayer body from a plurality of positive and negative electrode bodies and a separator interposed therebetween , and a container that accommodates and seals the capacitor main body together with an electrolytic solution. In the method of manufacturing an electric double layer capacitor, the process of creating a capacitor body includes a process of sticking a seal to one surface of a metal foil in an easily adhesive state, and collecting a positive electrode body and a negative electrode body from the metal foil by die cutting. The step of integrally forming the electrode together with the lead portion, the step of peeling off the seal of the region portion from the lead portion of the collector electrode, and the bundling in which a predetermined number of collector electrodes are assembled in a laminated state and the same polarity of these lead portions are overlapped A step of bonding to a state, a step of peeling off a seal remaining from each collector electrode in a stacked state, a polarizable electrode of a positive electrode body, a polarizable electrode of a negative electrode body, and a separator between the collector electrodes A seal that is attached to one surface of the metal foil in an easily peelable adhesive state, and is formed to a thickness corresponding to the thickness of the pair of polarizable electrodes and separator. It is characterized in that a cut is given at the boundary between the electrode region portion and the lead region portion .
[0010]
【The invention's effect】
In the present invention, the collector electrode is easily and efficiently produced from the metal foil (with a seal) including the lead portion by die cutting. A predetermined number of collector electrodes are integrated by a binding portion of these lead portions, and a pair of polarizable electrodes and a separator are interposed between the collector electrodes. Through these steps, the capacitor body is reasonably made, and the electric double layer capacitor can be supplied at low cost .
[0011]
Since burrs and the like at the time of die cutting adhere to the cut surface of the seal, removal of burrs and the like can be effectively achieved by peeling them off. Therefore, defects (separator damage etc.) due to floating of burrs and the like are prevented inside the electric double layer capacitor, and a high quality electric double layer capacitor can be supplied at a low cost .
[0012]
Since the seal of the metal foil is peeled off from the lead portion of the collector electrode after die cutting and the seal of the region portion of the collector electrode is left, a predetermined number of collector electrodes are laminated in a subsequent process. When assembled together, the lead portions are bound together in the same assembly state as the capacitor body (a laminated state in which a pair of polarizable electrodes and separators are interposed between the collector electrodes) by the seals remaining on the collector electrodes. It becomes possible to join to the state. The length of the lead part (distance from the connection side with the collector electrode to the binding part) is adjusted by the seal remaining on each collector electrode. Bonding can be processed appropriately and efficiently. Since the seal remaining on each collector electrode is peeled off before entering the subsequent process, and instead a pair of polarizable electrodes and separators are interposed, in that process, the polarizable electrodes and separators between each collector electrode With this interposition, there is no need to overwhelm the lead part or cause wrinkles .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, 10 is a container for accommodating a capacitor body (not shown) together with an electrolyte, 11 is a pair of terminal plates (capacitor electrodes) drawn out of the container 10, and each terminal plate 11a, 11b is a container. 10 are joined to the multilayer portions of the lead portions of the corresponding polarities.
[0016]
The capacitor body is configured by laminating the same number of positive and negative electrode bodies with a separator interposed therebetween. The collector of each positive electrode body and each negative electrode body is formed of a metal foil (for example, an aluminum foil), and activated carbon electrodes (polarizable electrodes) are formed on both surfaces thereof (the metal foil located at both ends of the laminate is one surface). The Lead portions are integrally formed on these collector electrodes, and terminal plates 11a and 11b (for example, aluminum electrodes) are joined to the multilayer portions of the same polarity.
[0017]
The capacitor body is immersed in the electrolytic solution and stored in the container 10. The container 10 is formed in a bag shape from a resin film having a laminated structure including a metal intermediate layer (in this example, aluminum laminate), and a pair of terminal plates 11a and 11b (part thereof) are drawn out from one side thereof. . The inside of the container 10 is sealed with a heat seal in a vacuum state while removing excess electrolyte by evacuation.
[0018]
A heat sealing welding agent (not shown) is attached to each terminal plate 11a, 11b in advance in order to compensate for the fusion with the resin film. A PE (polyethylene) material containing an adhesive is used as the welding agent. When a heat seal is applied to the opening of the bag 10 (container), the welding agent is melted and the resin film is favorably welded to the terminal board 11.
[0019]
FIG. 2 explains the manufacturing process (part) of the electric double layer capacitor. In (a), the metal foil 20 layered to a predetermined number is subjected to die cutting (22 is the die). The positive electrode body and the negative electrode collector electrode 21 are formed in the same shape and size. A lead portion (rectangular protrusion) is integrally formed on each collector electrode 21 on one side of the rectangular plane. The burrs 23 and the like generated during the die cutting process are removed from each collector electrode by an appropriate method. FIG. 3 is a perspective view illustrating the die cutting process of FIG. 2A in a supplementary manner, and the same reference numerals are given to the same parts as those in FIG. 21 a represents the lead portion of the collector electrode 21.
[0020]
In (b), the positive electrode collector electrode and the negative electrode collector electrode 21 are alternately overlapped to form a predetermined number of laminated bodies 21A (the same number of positive electrode collector electrodes 21 and negative electrode collector electrodes 21). . In this laminated body 21A, the overlapping portions of the lead portions 21a of the same polarity are joined in a bundled state, and one set of activated carbon electrodes (the polarizable electrode of the positive electrode body and the polarizability of the negative electrode body) between the stacked layers of the collector electrodes 21. Electrode) and a separator (sandwiched between a pair of activated carbon electrodes).
[0021]
By such a process, the creation of the collecting electrode 21 and the integration thereof are efficiently processed, the capacitor body is rationally configured, and the electric double layer capacitor can be supplied at low cost. When the electric double layer capacitor as a product is applied to a driving power source of an electric vehicle, a large number of the electric double layer capacitors are connected in series and parallel to constitute an assembled battery having a required capacity.
[0022]
Since the capacitor body has a shape in which the terminal plates 11a and 11b are further joined to the bundling portion 24 (joint portion) of the lead portions 21a of the same polarity, and is housed in the sealed container 10 as described above. is there. The joining between the lead portions 21a and the joining portion 24 and the terminal plates 11a and 11b are joined by ultrasonic welding and spot welding so as to ensure good conductivity and not damage the lead portion 21a of the metal foil. , Etc. are used.
[0023]
FIG. 4 explains the manufacturing process (part) of the electric double layer capacitor in another embodiment. In (a), the seal | sticker 25 is affixed on the single side | surface of the metal foil 20 in the adhesive state which is easy to peel. By stamping the metal foil (with a seal), the collectors 21 of the positive electrode body and the negative electrode body are formed in the same shape and the same size, and lead to one side of the rectangular plane of each collector electrode 21 on one side. A part (rectangular protrusion) is integrally formed.
[0024]
The burrs 23 and the like generated during the die cutting process are attached to the cut surface of each seal 25. Therefore, by removing these seals 25 from the metal foil after die cutting, removal of burrs and the like can be easily and effectively processed.
[0025]
Thereafter, in (b), the positive electrode collector electrode and the negative electrode collector electrode 21 are alternately stacked to form a predetermined number of laminated bodies 21A. In this laminated body 21A, the overlapping portions of the lead portions 21a having the same polarity are joined in a bundled state, and activated carbon electrodes and separators are interposed between the laminated layers of the collecting electrodes 21.
[0026]
Thus, the sticker 25 attached to the metal foil 20 makes it possible to easily and effectively remove burrs during die cutting. Therefore, defects (separator damage, etc.) due to floating of burrs and the like are prevented inside the electric double layer capacitor, and a high quality electric double layer capacitor can be supplied at low cost.
[0027]
The seal 21 affixed to the metal foil 20 has a pair of activated carbon electrodes (a polarizable electrode and a negative electrode) in order to provide a spacer function so that the integration of the collector electrode 21 can be processed accurately and efficiently. The thickness is set to a thickness corresponding to the thickness of the polarizable electrode) and the separator (sandwiched between a pair of activated carbon electrodes). Further, a cut is given to the seal at the boundary between the region of the collector electrode 21 and the region of the lead portion 21a.
[0028]
The seal portion of the lead portion 21a is peeled before the bonding process (b). In (b), when a predetermined number of collector electrodes 21 are assembled in a stacked state, the seal portions of these collector electrodes 21 cause a predetermined interval (space) between the stacked layers.
[0029]
Specifically, as shown in FIG. 5, a predetermined number of collector electrodes 21 are set in a stacked state using a jig 30. The seal portion 25a (spacer) of the collector electrode 21 creates a gap corresponding to the thickness of the pair of polarizable electrodes and the separator between the stacked layers. Therefore, the capacitor body (the pair of polarizable electrodes and the collector electrodes between the collector electrodes) In a combined state similar to that in which a separator is interposed), each lead portion 21a can be joined in a bundled state by a joining machine 31 (for example, a welding machine).
[0030]
The length of the lead portion 21a (distance from the connecting side to the collecting electrode 21 to the binding portion 24) is naturally adjusted by the spacer 25a of each collecting electrode 21 depending on the stacking position of the collecting electrode 21, so that the composition of the capacitor body In some cases, the lead portions 21a are not overwhelmed or wrinkled. The spacers 25a of the collector electrodes 21 are peeled off before the capacitor body composition (a pair of polarizable electrodes and separators are interposed between the collector electrodes).
[0031]
By setting such a spacer function on the seal 25 of the metal foil 20, not only the integration of a predetermined number of collector electrodes 21 (joining of the lead portions 21a) but also the composition of the capacitor body is processed appropriately and efficiently. it can. Further, since the burrs and the like can be effectively removed by the seal 25, the electric double layer capacitor can be rationally mass-produced, and a high-quality electric double layer capacitor can be supplied at low cost.
[0032]
Instead of setting the spacer 25a on the removal seal 25 such as burrs, these may be attached independently.
[Brief description of the drawings]
FIG. 1 is a perspective view of an electric double layer capacitor representing an embodiment of the present invention.
FIG. 2 is an explanatory view of the same manufacturing process.
FIG. 3 is an explanatory view of the same die cutting process.
FIG. 4 is an explanatory diagram of a manufacturing process in another embodiment.
FIG. 5 is an explanatory view relating to the integration of collector electrodes (joining of lead portions) in the same manner.
[Explanation of symbols]
20 Metal foil (for example, aluminum foil)
21 current collector 21A current collector laminate 21a lead part 24 lead part bundling part (joint part)
25 Seal 25a Spacer

Claims (1)

複数の正極体および負極体とこれらの間に介在するセパレータとから積層体に構成されるキャパシタ本体と、キャパシタ本体を電解液と共に収容して密封される容器と、を備える電気二重層キャパシタの製造方法において、キャパシタ本体を作成する工程は、金属箔の片面にシールを剥離容易な接着状態に貼付する工程と、この金属箔から型抜き加工により正極体および負極体の集電極をリード部と共に一体成形する工程と、集電極のリード部からその領域部分のシールを剥離する工程と、所定数の集電極を積層状態に組むと共にこれらリード部の同極同士を重ね合わせる結束状態に接合する工程と、積層状態の各集電極から残るシールを剥離する工程と、各集電極間に正極体の分極性電極と負極体の分極性電極とセパレータを介装する工程と、を備えてなり、金属箔の片面に剥離容易な接着状態に貼付されるシールについては、１対の分極性電極およびセパレータの厚さ分に相当する厚みに形成され、集電極の領域部分とリードの領域部分との境に切れ目が与えられることを特徴とする電気二重層キャパシタの製造方法。Manufacturing of an electric double layer capacitor comprising: a capacitor main body configured in a laminate from a plurality of positive and negative electrode bodies and a separator interposed therebetween; and a container that is sealed by containing the capacitor main body together with an electrolytic solution In the method, the capacitor body is formed by attaching the seal to one surface of the metal foil so that the seal can be easily peeled off, and integrating the positive electrode body and the negative electrode body collector electrode together with the lead portion by die cutting from the metal foil. A step of forming, a step of peeling the seal of the region portion from the lead portion of the collector electrode, a step of assembling a predetermined number of collector electrodes in a laminated state and joining them in a bundled state in which the same poles of these lead portions are superimposed , A step of peeling off the remaining seal from each collecting electrode in the laminated state, and a step of interposing a polarizable electrode of the positive electrode body, a polarizable electrode of the negative electrode body, and a separator between the collecting electrodes The seal that is attached to one surface of the metal foil in an easily peelable state is formed to have a thickness corresponding to the thickness of the pair of polarizable electrodes and the separator, A method of manufacturing an electric double layer capacitor, characterized in that a break is provided at a boundary with a region of a lead .
JP2001095406A 2001-03-29 2001-03-29 Manufacturing method of electric double layer capacitor Expired - Fee Related JP3995897B2 (en)

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