JP4842098B2 - Manufacturing method of electric double layer capacitor - Google Patents

Manufacturing method of electric double layer capacitor Download PDF

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JP4842098B2
JP4842098B2 JP2006306206A JP2006306206A JP4842098B2 JP 4842098 B2 JP4842098 B2 JP 4842098B2 JP 2006306206 A JP2006306206 A JP 2006306206A JP 2006306206 A JP2006306206 A JP 2006306206A JP 4842098 B2 JP4842098 B2 JP 4842098B2
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真吾 島田
隆行 三輪
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株式会社パワーシステム
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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
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Description

本発明は、電気二重層キャパシタの製造方法、特に充放電特性を検査する工程を有する電気二重層キャパシタの製造方法に関する。   The present invention relates to a method for manufacturing an electric double layer capacitor, and more particularly to a method for manufacturing an electric double layer capacitor having a step of inspecting charge / discharge characteristics.

電気二重層キャパシタとして、例えば特許文献１に開示されているように、複数のパッケージセルを所定の積層方向に積層してなるセル積層体と、このセル積層体をその積層方向に押圧するばねなどの押圧部材とを、ハウジングに収容したものが提案されている。ハウジングとしては、複数のフレーム部材を組み付けて箱形に形成されたものが提案されており、それらのフレーム部材同士は、複数のボルトやネジ等の固定具を用いて締結される。
特許第２９８７１６２号公報 As an electric double layer capacitor, for example, as disclosed in Patent Document 1, a cell stack formed by stacking a plurality of package cells in a predetermined stacking direction, a spring for pressing the cell stack in the stacking direction, etc. The thing which accommodated this press member in the housing is proposed. As a housing, a housing formed in a box shape by assembling a plurality of frame members has been proposed, and these frame members are fastened by using a plurality of fixing tools such as bolts and screws.
Japanese Patent No. 2987162

ところで、電気二重層キャパシタでは、市場に出される前に、所望の充放電特性を有するか否かを検査する（以下、「特性検査」という。）ことが行われている。   By the way, an electric double layer capacitor is inspected (hereinafter referred to as “characteristic inspection”) to determine whether or not it has a desired charge / discharge characteristic before being put on the market.

しかし、上述の電気二重層キャパシタでは、特性検査の結果、例えば特定のパッケージセルが所望の充放電特性を有さないことが確認された場合、このパッケージセルを新たなパッケージセルと交換するためにはフレームを分解しなければならず、その際、すでに締結されているボルト等を外さなければならない。しかし、いったん締め付けたボルトを緩めて外すことは多大な労力を要するという問題がある。   However, in the above-described electric double layer capacitor, in order to replace this package cell with a new package cell, for example, when it is confirmed as a result of the characteristic inspection that the specific package cell does not have a desired charge / discharge characteristic. The frame must be disassembled, and the bolts already fastened must be removed. However, there is a problem that it takes a lot of labor to loosen and remove the bolt once tightened.

このような問題に鑑みて、パッケージセルの交換作業等を容易にするために、特性検査の前には仮止め用の治具を用いてフレームを仮止めしておき、特性検査の結果、各パッケージセルが所望の充放電特性を有することが確認された場合にボルトでフレームを締結することが考えられる。   In view of such a problem, in order to facilitate the replacement work of the package cell, etc., the frame is temporarily fixed using a temporary fixing jig before the characteristic inspection. When it is confirmed that the package cell has desired charge / discharge characteristics, it is conceivable to fasten the frame with bolts.

ところが、締結用のボルトとは別に仮止め用の治具を用いると、各パッケージセルが所望の充放電特性を有すると確認された場合にあっても、仮止め用治具の取外し作業とボルトの締結作業を行わなければならないため、製造作業の効率が極めて悪いという問題がある。   However, if a temporary fixing jig is used in addition to the fastening bolt, even if it is confirmed that each package cell has the desired charge / discharge characteristics, the temporary fixing jig removal work and the bolt Therefore, there is a problem that the efficiency of the manufacturing work is extremely poor.

また、特性検査は、積層されたパッケージセルをその積層方向の両側から押圧した状態で行うため、その押圧力に対応したばねの反力に十分に耐え得る強度で仮止めするためには、多数の仮止め用の治具を使用しなければならず、それぞれの仮止め用治具を取り付け、取り外す手間がかかることから、作業効率を一層悪化させてしまう。   In addition, since the characteristic inspection is performed in a state where the stacked package cells are pressed from both sides in the stacking direction, in order to temporarily fix the cells with sufficient strength to withstand the reaction force of the spring corresponding to the pressing force, Thus, it is necessary to use the temporary fixing jigs, and it takes time and labor to attach and remove the temporary fixing jigs, which further deteriorates the work efficiency.

そこで、本発明は、特性検査後において必要に応じて容易にセルを交換できるとともに、製造作業を効率的に行うことができる電気二重層キャパシタの製造方法を提供することを目的とする。   Therefore, an object of the present invention is to provide a method for manufacturing an electric double layer capacitor that can easily replace cells as necessary after the characteristic inspection and can efficiently perform the manufacturing operation.

上記課題を解決するため、本発明に係る電気二重層キャパシタの製造方法は、
複数のパッケージセルを所定の積層方向に積層してなるセル積層体と、該セル積層体を上記積層方向に平行または略平行な所定の押圧方向に押圧する押圧部材とを収容する略箱形のハウジングが、上記押圧部材によって押圧されるフレーム部材と、該フレーム部材に所定の固定具により締結される別のフレーム部材とを含む電気二重層キャパシタの製造方法において、
上記ハウジングに上記セル積層体と上記押圧部材とを収容するようにして、上記２つのフレーム部材の一方を他方の上記フレーム部材と締結可能な位置に配置し、上記２つのフレーム部材が重なり合う接合部分を上記固定具が上記押圧方向に対して直角または略直角な所定の貫通方向に貫通するように、且つ、該貫通方向に沿って上記ハウジングの外側から引き抜き可能なように、上記固定具を上記ハウジングの外側から上記接合部分へ差し込んで仮止めする仮止め工程と、
該仮止め工程の後に、電気二重層キャパシタの特性検査を行う検査工程と、
該検査工程において上記特性検査の結果が良好である場合に、上記ハウジングの外側からの所定の本止め操作により上記固定具を本止めして、上記接合部分において上記２つのフレーム部材を締結する締結工程とを含むことを特徴とする。 In order to solve the above problems, a method for producing an electric double layer capacitor according to the present invention includes:
A substantially box-shaped housing that accommodates a cell stack formed by stacking a plurality of package cells in a predetermined stacking direction, and a pressing member that presses the cell stack in a predetermined pressing direction parallel or substantially parallel to the stacking direction. In the method of manufacturing an electric double layer capacitor, wherein the housing includes a frame member pressed by the pressing member and another frame member fastened to the frame member by a predetermined fixture.
The cell stack and the pressing member are accommodated in the housing, and one of the two frame members is disposed at a position that can be fastened to the other frame member, and the two frame members overlap each other. The fixing tool so that it can be pulled out from the outside of the housing along the penetrating direction so that the fixing tool penetrates in a predetermined penetrating direction perpendicular to or substantially perpendicular to the pressing direction. A temporary fixing step of temporarily inserting into the joining portion from the outside of the housing;
After the temporary fixing step, an inspection step for inspecting the characteristics of the electric double layer capacitor;
When the result of the characteristic inspection is good in the inspection step, the fastening is fastened by a predetermined fastening operation from the outside of the housing, and the two frame members are fastened at the joining portion. And a process.

本発明の電気二重層キャパシタの製造方法によれば、ハウジングのフレーム部材同士の仮止め及び締結に同じ固定具を用いるため、フレーム部材を仮止めした状態で行う特性検査の結果が良好である場合、仮止め状態の固定具を本止めするだけでフレーム部材を締結できることから、製造作業を効率的に行うことができる。   According to the method for manufacturing an electric double layer capacitor of the present invention, since the same fixture is used for temporarily fixing and fastening the frame members of the housing, the result of the characteristic inspection performed with the frame members temporarily fixed is good. Since the frame member can be fastened only by permanently fixing the fixture in the temporarily fixed state, the manufacturing operation can be performed efficiently.

しかも、仮止め状態の固定具は、ハウジングの内部において押圧部材がセル積層体を押圧する押圧方向に対して直角または略直角な貫通方向にフレーム部材の接合部分を貫通しているため、押圧力に対応する押圧部材の反力、すなわち押圧方向または押圧方向と反対方向の力がフレーム部材を介して固定具に加えられても、接合部分から固定具が外れ難い。したがって、仮止め状態を維持するために必要な固定具の使用個数が少なくて済むため、仮止め操作および本止め操作の労力を軽減できる。   In addition, since the fixing tool in the temporarily fixed state penetrates the joint portion of the frame member in a penetrating direction perpendicular or substantially perpendicular to the pressing direction in which the pressing member presses the cell stack inside the housing, the pressing force Even if a reaction force of the pressing member corresponding to the above, that is, a pressing direction or a force in the direction opposite to the pressing direction is applied to the fixing tool via the frame member, the fixing tool is unlikely to come off from the joint portion. Accordingly, since the number of fixtures necessary for maintaining the temporarily fixed state can be reduced, the labor of the temporary fixing operation and the final fixing operation can be reduced.

また、仮止め状態の固定具は、貫通方向に沿ってハウジングの外側から引き抜き可能であるため、仮止めした状態で行う特性検査の結果が良好でない場合、フレーム部材を容易に取り外すことができ、パッケージセルの交換作業を容易に行うことができる。   In addition, since the fixture in the temporarily fixed state can be pulled out from the outside of the housing along the penetrating direction, if the result of the property inspection performed in the temporarily fixed state is not good, the frame member can be easily removed, The replacement work of the package cell can be easily performed.

さらに、仮止め用および締結用の固定具としてブラインドリベットを用いることで、フレーム部材の仮止め作業および締結作業をハウジングの外側から容易に行うことができ、作業効率の向上を図ることができる。   Furthermore, by using blind rivets as temporary fixing and fastening fixtures, the temporary fixing work and fastening work of the frame member can be easily performed from the outside of the housing, and the work efficiency can be improved.

以下、添付図面に基づいて本発明の実施形態を詳細に説明する。なお、以下の説明では、図面を参照した発明の理解を容易にするために、図面に表された部材の位置や配置を説明する際に、必要に応じて、例えば「上」、「下」、「左」、「右」又はそれらの用語を含む別の用語を用いる。しかし、これらの用語は、発明の理解を容易にする目的で使用するものであって、本発明の技術的範囲を定める上で利用されるべきものでない。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, for the purpose of facilitating understanding of the invention with reference to the drawings, for example, “upper”, “lower” are used as necessary when explaining the positions and arrangements of the members shown in the drawings. , “Left”, “right” or other terms including those terms. However, these terms are used for the purpose of facilitating understanding of the invention, and should not be used to define the technical scope of the present invention.

図１〜図３は、本発明の製造方法によって製造された電気二重層キャパシタの外観を示す。図示するように、本発明の電気二重層キャパシタ１は、略箱形のハウジング２と、ハウジング２の内部に収容されたセル積層体３及び該セル積層体３をその積層方向に平行または略平行な所定の押圧方向に押圧する押圧部材４（図９参照）と、ハウジング２の外側に固定された回路基板５を有する。   1 to 3 show the appearance of an electric double layer capacitor manufactured by the manufacturing method of the present invention. As shown in the figure, an electric double layer capacitor 1 of the present invention includes a substantially box-shaped housing 2, a cell stack 3 housed in the housing 2, and the cell stack 3 parallel or substantially parallel to the stacking direction. A pressing member 4 (see FIG. 9) that presses in a predetermined pressing direction, and a circuit board 5 fixed to the outside of the housing 2.

ハウジング２は、四角形（例えば、長方形又は正方形）の上面を形成する上部フレームの天板１１と、前後左右の周囲４側面を形成する外周フレームの周壁１２と、底面を形成する底部フレームの底板１３（図３参照）を有する。   The housing 2 includes a top plate 11 of an upper frame that forms an upper surface of a quadrangle (for example, a rectangle or a square), a peripheral wall 12 of an outer frame that forms four sides of front, rear, left, and right, and a bottom plate 13 of a bottom frame that forms a bottom surface. (See FIG. 3).

図４に示すように、天板１１は、電気絶縁性の材料（例えば、絶縁性の樹脂）で形成されており、上面と下面を貫通する、２つの端子孔１５と複数の連結孔１６を備えている。図１と図２に示すように、端子孔１５には外部導出端子（正極端子、負極端子）１７，１８が固定されている。連結孔１６は、対向する一対の端部近傍に等間隔に配置されている。   As shown in FIG. 4, the top plate 11 is formed of an electrically insulating material (for example, insulating resin), and includes two terminal holes 15 and a plurality of connecting holes 16 that penetrate the upper surface and the lower surface. I have. As shown in FIGS. 1 and 2, external lead-out terminals (positive terminal, negative terminal) 17 and 18 are fixed to the terminal hole 15. The connecting holes 16 are arranged at equal intervals in the vicinity of a pair of opposing ends.

図９に示すように、周壁１２は、第１のフレーム部材２０と第２のフレーム部材２１とを有する。図２に示すように、第１のフレーム部材２０は、４つの側壁のうちの連続した３つの側壁、すなわち、対向する一対の側壁２２ａと、これら一対の側壁２２ａを互いに連結する一つの側壁２２ｂを形成する。図１と図３に示すように、第２のフレーム部材２１は、４つの側壁の残りの一つの側壁２２ｃを形成する。第１のフレーム部材２０と第２のフレーム部材２１は、ブラインドリベット７０により締結される。ブラインドリベット７０の構成は後に説明する。   As shown in FIG. 9, the peripheral wall 12 includes a first frame member 20 and a second frame member 21. As shown in FIG. 2, the first frame member 20 includes three consecutive side walls of the four side walls, that is, a pair of opposing side walls 22a and a side wall 22b that connects the pair of side walls 22a to each other. Form. As shown in FIGS. 1 and 3, the second frame member 21 forms the remaining one side wall 22c of the four side walls. The first frame member 20 and the second frame member 21 are fastened by a blind rivet 70. The configuration of the blind rivet 70 will be described later.

実施形態において、第１のフレーム部材２０と第２のフレーム部材２１はそれぞれ、一枚の金属板を折り曲げて形成されている。   In the embodiment, each of the first frame member 20 and the second frame member 21 is formed by bending a single metal plate.

図８に示すように、第１のフレーム部材２０は、対向する一対の側壁２２ａの上端から内方に突出する複数の天板連結部２３を備えている。天板連結部２３にはそれぞれねじ孔２４が形成されている。側壁２２ａは、側壁２２ｂから離れた端部に、縦方向に所定の間隔をあけて複数（実施形態では３つ）の連結用の孔２５を有する。連結用の孔２５は、後述するブラインドリベット７０のスリーブ７２の外径よりも大径であり、且つ、ブラインドリベット７０のフランジ７４の外径よりも小径の円形とされている。   As shown in FIG. 8, the first frame member 20 includes a plurality of top plate connecting portions 23 that protrude inward from the upper ends of a pair of opposing side walls 22a. A screw hole 24 is formed in each top plate connecting portion 23. The side wall 22a has a plurality (three in the embodiment) of connecting holes 25 at predetermined intervals in the vertical direction at the end away from the side wall 22b. The connection hole 25 has a larger diameter than an outer diameter of a sleeve 72 of a blind rivet 70 to be described later, and has a smaller diameter than an outer diameter of a flange 74 of the blind rivet 70.

図３に示すように、側壁２２ａを繋ぐ側壁２２ｂは、その下端部から内方に突出する底部フランジ２６を有し、この底部フランジ２６に複数の底板固定用の孔２７を備えている。図９に示すように、第２のフレーム部材２１は、左右両端部と下端部からそれぞれ内方に突出する一対の側部フランジ２８と底部フランジ２９を備えている。側部フランジ２８には、第１のフレーム部材２０の孔２５の間隔と同一の間隔を縦方向にあけて、複数の連結用の孔３０が形成されている。連結用の孔３０は、後述するブラインドリベット７０のスリーブ７２の外径と同じか又は略同じ径を有する円形とされている。   As shown in FIG. 3, the side wall 22 b that connects the side walls 22 a has a bottom flange 26 that protrudes inwardly from its lower end, and the bottom flange 26 includes a plurality of bottom plate fixing holes 27. As shown in FIG. 9, the second frame member 21 includes a pair of side flanges 28 and a bottom flange 29 that protrude inward from the left and right ends and the lower end. A plurality of connecting holes 30 are formed in the side flange 28 with the same interval as the interval of the holes 25 of the first frame member 20 in the vertical direction. The connection hole 30 has a circular shape having the same or substantially the same outer diameter as a sleeve 72 of a blind rivet 70 described later.

図５に示すように、底板１３は、四角形の金属板又は樹脂板からなり、一辺の端部近傍に、第１のフレーム部材２０の底部フランジ２６の孔２７と同一の間隔をあけて複数のねじ孔３１が形成されている。   As shown in FIG. 5, the bottom plate 13 is made of a rectangular metal plate or resin plate, and has a plurality of gaps in the vicinity of one side end portion with the same interval as the holes 27 of the bottom flange 26 of the first frame member 20. A screw hole 31 is formed.

図３に示すように、回路基板５は、ハウジング周壁１２の外側に固定されている。ただし、回路基板５は、天板１１の裏側（ハウジングの内部）、底板１３の上面または底面に設けることもできる。   As shown in FIG. 3, the circuit board 5 is fixed to the outside of the housing peripheral wall 12. However, the circuit board 5 can also be provided on the back side of the top plate 11 (inside the housing) and on the top surface or bottom surface of the bottom plate 13.

図８に示すように、セル積層体３は、複数のパッケージセル４１を所定の積層方向に積層して構成されている。実施の形態では、セル積層体３は、１０個のパッケージセル４１を重ねて構成されているが、その数は限定的ではない。   As shown in FIG. 8, the cell stack 3 is configured by stacking a plurality of package cells 41 in a predetermined stacking direction. In the embodiment, the cell stack 3 is configured by stacking ten package cells 41, but the number is not limited.

図６と図７に示すように、各パッケージセル４１は、略四角形の袋状容器のパッケージ４２を有する。パッケージ４２は、少なくとも最内層と最外層が電気的に絶縁性の材料からなるフィルムで構成された積層型の可撓性シートからなり、上部のフィルム接合部から正極集電極４３と負極集電極４４が突出させてある。図面から省略されているが、パッケージ４２の内部には、両面に炭素を主体とする分極性電極を有する複数の集電極が、セパレータを介して重ね合わせた積層体が電解液と共に収容されており、各集電極の正極端子と負極端子がそれぞれ正極集電極４３と負極集電極４４に接続されている。このように構成された複数のパッケージセル４１は、図８に示すように、隣接するパッケージセルの正極集電極４３と負極集電極４４を接続端子４５で連結して、直列に接続される。   As shown in FIGS. 6 and 7, each package cell 41 has a substantially rectangular bag-shaped container package 42. The package 42 is made of a laminated flexible sheet having at least an innermost layer and an outermost layer made of a film made of an electrically insulating material, and a positive electrode collecting electrode 43 and a negative electrode collecting electrode 44 from the upper film joint. Is protruding. Although omitted from the drawing, a laminate in which a plurality of collector electrodes each having a polarizable electrode mainly composed of carbon are superimposed on both sides via a separator is accommodated in the package 42 together with an electrolytic solution. The positive electrode terminal and the negative electrode terminal of each collector electrode are connected to the positive electrode collector electrode 43 and the negative electrode collector electrode 44, respectively. As shown in FIG. 8, the plurality of package cells 41 configured in this way are connected in series by connecting the positive electrode collector electrode 43 and the negative electrode collector electrode 44 of the adjacent package cell with a connection terminal 45.

図６に示すように、実施形態では、各パッケージセル４１の左右両側に位置する縦方向の接合部４６を積層方向に沿うようにほぼ直角に折り曲げて規制部４７が形成されている。したがって、セル積層体３において、各パッケージセル４１は、積層方向と直交する水平方向に関して、他のパッケージセル４１によって同水平方向の移動が規制されている。そのため、セル積層体３の取扱いが容易に行える。   As shown in FIG. 6, in the embodiment, the restriction portions 47 are formed by bending the vertical joint portions 46 positioned on the left and right sides of each package cell 41 substantially at right angles along the stacking direction. Therefore, in the cell stack 3, each package cell 41 is restricted from moving in the horizontal direction by other package cells 41 in the horizontal direction orthogonal to the stacking direction. Therefore, the cell stack 3 can be easily handled.

押圧部材４は、詳細な図示を省略するが、パッケージセル４１の分極性電極の膨張を制限するためにセル積層体３を押圧する部材であり、具体的には、例えば加圧袋、板ばね、コイルスプリング等が用いられる。   Although not shown in detail, the pressing member 4 is a member that presses the cell stack 3 to limit the expansion of the polarizable electrode of the package cell 41. Specifically, for example, a pressing bag, a leaf spring, or the like is used. A coil spring or the like is used.

続いて、第１のフレーム部材２０と第２のフレーム部材２１との締結に用いるブラインドリベット７０の構成を説明する。図１１に示すように、ブラインドリベット７０は、一端にフランジ７４を備えたスリーブ７２と、スリーブ７２の両端よりそれぞれ突出するようにスリーブ７２に内嵌されたシャフト７８とを有する。シャフト７８は、スリーブ７２におけるフランジ７４が設けられた端部とは反対側の端部より突出した先端部に、スリーブ７２の内径よりも大径の大径部８０を有する。ブラインドリベット７０を用いて第１のフレーム部材２０と第２のフレーム部材２１とを締結する方法については後に説明する。   Next, the configuration of the blind rivet 70 used for fastening the first frame member 20 and the second frame member 21 will be described. As shown in FIG. 11, the blind rivet 70 includes a sleeve 72 having a flange 74 at one end, and a shaft 78 fitted into the sleeve 72 so as to protrude from both ends of the sleeve 72. The shaft 78 has a large-diameter portion 80 having a diameter larger than the inner diameter of the sleeve 72 at a tip portion protruding from an end portion on the opposite side to the end portion provided with the flange 74 in the sleeve 72. A method of fastening the first frame member 20 and the second frame member 21 using the blind rivet 70 will be described later.

上述の構成を備えた電気二重層キャパシタ１の製造方法について説明する。まず、図３に示すように、第１のフレーム部材２０に底板１３を取り付ける。このとき、図３と図５に示すように、第１のフレーム部材２０に設けた底部フランジ２６の孔２７を介して底板１３のねじ孔３１にねじ５５を螺合して、第１のフレーム部材２０に底板１３を固定する。第１のフレーム部材２０を構成する中央の側壁２２ｂの内側には、金属又は樹脂からなる四角形の緩衝板５６（図３参照）を設けてもよい。   A method for manufacturing the electric double layer capacitor 1 having the above-described configuration will be described. First, as shown in FIG. 3, the bottom plate 13 is attached to the first frame member 20. At this time, as shown in FIGS. 3 and 5, the screw 55 is screwed into the screw hole 31 of the bottom plate 13 through the hole 27 of the bottom flange 26 provided in the first frame member 20, thereby The bottom plate 13 is fixed to the member 20. A square buffer plate 56 (see FIG. 3) made of metal or resin may be provided inside the central side wall 22b constituting the first frame member 20.

次に、図８に示すように、複数のパッケージセル４１を積層して電気的に接続したセル積層体３を第１のフレーム部材２０の内側に収容する。この状態で、セル積層体３は、その底部が底板１３によって支持される。   Next, as shown in FIG. 8, the cell stack 3 in which a plurality of package cells 41 are stacked and electrically connected is accommodated inside the first frame member 20. In this state, the bottom of the cell stack 3 is supported by the bottom plate 13.

次に、セル積層体３の最外層を構成する一方と他方のパッケージセル４１の集電極（隣接するパッケージセルの集電極と接続されていない集電極）を天板１１の一方と他方の外部導出端子１７，１８にそれぞれ接続し、このように電気的に接続された天板１１を周壁１２の上に配置し、複数のねじ５８を天板１１の孔１６を介して周壁１２のねじ孔２４に螺合する。   Next, the collector electrode of one and the other package cells 41 constituting the outermost layer of the cell stack 3 (collector electrode not connected to the collector electrode of the adjacent package cell) is led out to the other of the top plate 11 and the other. Each of the top plates 11 connected to the terminals 17 and 18 and electrically connected in this way is disposed on the peripheral wall 12, and a plurality of screws 58 are screwed into the screw holes 24 of the peripheral wall 12 through the holes 16 of the top plate 11. Threaded onto.

次に、図９に示すように、ハウジング２にセル積層体３と押圧部材４とを収容するようにして、第２のフレーム部材２１を第１のフレーム部材２０と締結可能な位置に配置し、第２のフレーム部材２１を第１のフレーム部材２０に仮止めする。   Next, as shown in FIG. 9, the second frame member 21 is disposed at a position capable of being fastened to the first frame member 20 so that the cell stack 3 and the pressing member 4 are accommodated in the housing 2. The second frame member 21 is temporarily fixed to the first frame member 20.

具体的に、第１のフレーム部材２０の対向する側壁２２ａの内側に第２のフレーム部材２１の側部フランジ２８を位置させた状態で、押圧部材４に対抗して第２のフレーム部材２１をセル積層体３に向けて押圧して仮止めを行う。   Specifically, the second frame member 21 is opposed to the pressing member 4 in a state where the side flange 28 of the second frame member 21 is positioned inside the opposing side wall 22a of the first frame member 20. It presses toward the cell laminated body 3 and temporarily fixes.

この仮止めには、第１のフレーム部材２０と第２のフレーム部材２１とを締結するブラインドリベット７０を用いる。ブラインドリベット７０は、図９〜図１１に示すように、フランジ７４がハウジング２の外側に露出するように、且つ、第１のフレーム部材２０を構成する側壁２２ａと第２のフレーム部材２１の側部フランジ２８とが重なり合う接合部分をスリーブ７２が押圧方向（図１１に示す矢印Ａ方向）に対して直角または略直角な所定の貫通方向に貫通するように、ハウジング２の外側から第１のフレーム部材２０の孔２５と第２のフレーム部材２１の孔３０に差し込んで仮止めする。   For this temporary fixing, a blind rivet 70 for fastening the first frame member 20 and the second frame member 21 is used. As shown in FIGS. 9 to 11, the blind rivet 70 is disposed so that the flange 74 is exposed to the outside of the housing 2, and on the side of the side wall 22 a constituting the first frame member 20 and the second frame member 21. The first frame is formed from the outside of the housing 2 so that the sleeve 72 penetrates through a predetermined penetration direction perpendicular to or substantially perpendicular to the pressing direction (arrow A direction shown in FIG. 11) through the joint portion where the part flange 28 overlaps. The hole 20 of the member 20 and the hole 30 of the second frame member 21 are inserted and temporarily fixed.

仮止め状態のブラインドリベット７０は、第１のフレーム部材２０と第２のフレーム部材２１との接合部分を押圧方向と直角または略直角な方向に貫通しているため、押圧力に対応する押圧部材４の反力、すなわち押圧方向または押圧方向と反対方向の力がフレーム部材２０，２１を介してブラインドリベット７０に加えられても、接合部分からブラインドリベット７０が外れ難くなっている。   Since the blind rivet 70 in the temporarily fixed state passes through the joint portion between the first frame member 20 and the second frame member 21 in a direction perpendicular to or substantially perpendicular to the pressing direction, the pressing member corresponding to the pressing force Even when the reaction force 4, that is, a force in the pressing direction or a direction opposite to the pressing direction is applied to the blind rivet 70 via the frame members 20, 21, the blind rivet 70 is difficult to come off from the joint portion.

また、仮止め状態において、図１１に示すように、第２のフレーム部材２１の孔３０の径は、スリーブ７２の外径と同じか又は略同じであるため、ブラインドリベット７０の第２のフレーム部材２１に対する相対的な移動が規制されている。一方、第１のフレーム部材２０の孔２５の径は、スリーブ７２の外径よりも大きいため、押圧方向（図中矢印Ａ方向）において、ブラインドリベット７０の第１のフレーム部材２０に対する相対的な移動は所定の範囲内で許容されている。   Further, in the temporarily fixed state, as shown in FIG. 11, the diameter of the hole 30 of the second frame member 21 is the same as or substantially the same as the outer diameter of the sleeve 72. The relative movement with respect to the member 21 is restricted. On the other hand, since the diameter of the hole 25 of the first frame member 20 is larger than the outer diameter of the sleeve 72, the blind rivet 70 is relatively relative to the first frame member 20 in the pressing direction (the arrow A direction in the figure). Movement is permitted within a predetermined range.

したがって、仮止め状態において、第２のフレーム部材２１は、押圧部材４によって押圧方向と反対方向に押圧されると、ブラインドリベット７０と共に押圧方向と反対方向へ僅かに移動する。仮に、ブラインドリベット７０が第１のフレーム部材２０に対して相対的に移動できなければ、押圧部材４により第２のフレーム部材２１が押圧されたとき、ブラインドリベット７０は第２のフレーム部材２１と共に移動できず、押圧力に対応する押圧部材４の反力を受けて押圧方向と反対方向へ移動しようとする第２のフレーム部材２１により、ブラインドリベット７０が大きな負荷を受けてしまう。これに対して、本実施形態では、第２のフレーム部材２１が、押圧部材４によって押圧方向と反対方向に押圧されても、ブラインドリベット７０が第２のフレーム部材２１と共に移動することで、第２のフレーム部材２１からブラインドリベット７０が受ける負荷を軽減でき、仮止め状態を良好に維持できる。   Therefore, in the temporarily fixed state, when the second frame member 21 is pressed in the direction opposite to the pressing direction by the pressing member 4, the second frame member 21 moves slightly in the direction opposite to the pressing direction together with the blind rivet 70. If the blind rivet 70 cannot move relative to the first frame member 20, when the second frame member 21 is pressed by the pressing member 4, the blind rivet 70 and the second frame member 21 are moved together. The blind rivet 70 is subjected to a large load by the second frame member 21 that cannot move but receives the reaction force of the pressing member 4 corresponding to the pressing force and tries to move in the direction opposite to the pressing direction. On the other hand, in the present embodiment, even if the second frame member 21 is pressed in the direction opposite to the pressing direction by the pressing member 4, the blind rivet 70 moves together with the second frame member 21, thereby The load received by the blind rivet 70 from the second frame member 21 can be reduced, and the temporarily fixed state can be maintained well.

次に、電気二重層キャパシタ１が所望の充放電特性を有するか否かを確認する特性検査を行う。このとき、セル積層体３に回路基板５を電気的に接続しておくが、回路基板５のハウジング２への取付けは、特性検査を行い良好な結果が得られた後に行う。   Next, a characteristic inspection is performed to confirm whether or not the electric double layer capacitor 1 has a desired charge / discharge characteristic. At this time, the circuit board 5 is electrically connected to the cell laminate 3, but the circuit board 5 is attached to the housing 2 after a characteristic inspection is performed and a good result is obtained.

特性検査は、押圧部材４によりセル積層体３を押圧しながら行うが、上述のように第１のフレーム部材２０と第２のフレーム部材２１との接合部分はブラインドリベット７０が外れ難い状態で仮止めされているため、その仮止め状態は、特性検査を行っている間も適切に維持される。   The characteristic inspection is performed while the cell stack 3 is pressed by the pressing member 4, but as described above, the joint portion between the first frame member 20 and the second frame member 21 is temporarily in a state in which the blind rivet 70 is difficult to come off. Since it is stopped, the temporarily fixed state is appropriately maintained even during the characteristic inspection.

特性検査の結果、電気二重層キャパシタ１が所望の充放電特性を有さないことが確認された場合、第１のフレーム部材２０から第２のフレーム部材２１と天板１１を取り外して、性能不良のパッケージセル４１の交換作業等を行う。第２のフレーム部材２１を取り外す際、ブラインドリベット７０は、ハウジング２の外側から容易に引き抜くことができるため、パッケージセル４１の交換作業を容易に行うことができる。   As a result of the characteristic inspection, when it is confirmed that the electric double layer capacitor 1 does not have a desired charge / discharge characteristic, the second frame member 21 and the top plate 11 are removed from the first frame member 20 to cause poor performance. The package cell 41 is exchanged. When removing the second frame member 21, the blind rivet 70 can be easily pulled out from the outside of the housing 2, so that the replacement work of the package cell 41 can be easily performed.

パッケージセル４１の交換作業が完了すると、セル積層体３と電気的に接続した天板１１を第１のフレーム部材２０に取り付け、第２のフレーム部材２１を第１のフレーム部材２０に仮止めする。さらに、セル積層体３と回路基板５を電気的に接続して、再び特性検査を行う。   When the replacement operation of the package cell 41 is completed, the top plate 11 electrically connected to the cell stack 3 is attached to the first frame member 20, and the second frame member 21 is temporarily fixed to the first frame member 20. . Further, the cell stack 3 and the circuit board 5 are electrically connected, and the characteristic inspection is performed again.

特性検査の結果、電気二重層キャパシタ１が所望の充放電特性を有することが確認された場合、ハウジング２の外側からの本止め操作によりブラインドリベット７０を本止めして、第１のフレーム部材２０と第２のフレーム部材２１とを締結する。   As a result of the characteristic inspection, when it is confirmed that the electric double layer capacitor 1 has a desired charge / discharge characteristic, the blind rivet 70 is finally fixed by a final fixing operation from the outside of the housing 2, and the first frame member 20 And the second frame member 21 are fastened together.

ブラインドリベット７０の本止め操作は、図１２に示すように、スリーブ７２の一端よりハウジング２の外側に突出したシャフト７８の突出部分８２をリベッタ９０で引き込むことで行う。この本止め操作により、ハウジング２の内側に配置されたスリーブ７２の端部は、シャフト７８の大径部８０で押し潰されることで、外径が拡大されるように変形し、シャフト７８の突出部分８２は切断される。こうして変形されたスリーブ７２が、その変形部分７６とフランジ７４とによって、第１のフレーム部材２０と第２のフレーム部材２１とを強い力で挟み込むことで、それら２つのフレーム部材２０，２１が締結される。   As shown in FIG. 12, the actual fastening operation of the blind rivet 70 is performed by pulling the protruding portion 82 of the shaft 78 protruding from the one end of the sleeve 72 to the outside of the housing 2 with a riveter 90. By this permanent fastening operation, the end portion of the sleeve 72 disposed inside the housing 2 is crushed by the large-diameter portion 80 of the shaft 78, so that the outer diameter is expanded and the shaft 78 protrudes. Portion 82 is cut. The sleeve 72 deformed in this manner sandwiches the first frame member 20 and the second frame member 21 with a strong force by the deformed portion 76 and the flange 74, so that the two frame members 20 and 21 are fastened. Is done.

最後に、第１のフレーム部材２０の外側に回路基板５を取り付けて、電気二重層キャパシタ１が完成する。   Finally, the circuit board 5 is attached to the outside of the first frame member 20 to complete the electric double layer capacitor 1.

この製造方法によれば、仮止めしていたブラインドリベット７０を本止めすることで、第１のフレーム部材２０と第２のフレーム部材２１とを簡単に締結できるため、電気二重層キャパシタ１を効率的に製造できる。   According to this manufacturing method, the first frame member 20 and the second frame member 21 can be easily fastened by permanently fastening the blind rivet 70 that has been temporarily fastened. Can be manufactured.

以上の説明では、複数のパッケージセル４１を接続端子４５で接続した状態のセル積層体３をハウジング２に収容したが、特性検査の結果が良好でない場合にパッケージセル４１を交換する作業の効率を考慮して、ハウジング２に収容する段階では接続端子に代わる別の仮接続用の治具を用いてパッケージセル４１を電気的に接続しておき、最終的に全てのパッケージセル４１が所望の充放電特性を有することを確認できた状態で接続端子４５を用いてパッケージセル４１を接続し、天板１１を固定してもよい。   In the above description, the cell stack 3 in a state in which a plurality of package cells 41 are connected by the connection terminals 45 is accommodated in the housing 2, but the efficiency of the work of replacing the package cells 41 when the result of the characteristic inspection is not good. In consideration, at the stage of housing in the housing 2, the package cells 41 are electrically connected using another temporary connection jig instead of the connection terminals. The package cell 41 may be connected using the connection terminal 45 in a state where it has been confirmed that it has discharge characteristics, and the top plate 11 may be fixed.

以上、上述の実施形態を挙げて本発明を説明したが、本発明は上述の実施形態に限定されるものではなく、特許請求の範囲に記載された発明の範囲で種々変更可能である。   The present invention has been described with reference to the above-described embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims.

例えば、上述の実施形態では、天板１１を第１のフレーム部材２０に対してねじ５８で固定する構成について説明したが、天板１１についても、第２のフレーム部材２１と同様、ブラインドリベット７０を用いて、第１のフレーム部材２０に仮止め及び締結を行うようにしてもよい。   For example, in the above-described embodiment, the configuration in which the top plate 11 is fixed to the first frame member 20 with the screws 58 has been described, but the top plate 11 is also the blind rivet 70 as in the second frame member 21. May be used to temporarily fix and fasten the first frame member 20.

また、上述の実施形態では、第１のフレーム部材２０の孔２５が、ブラインドリベット７０のスリーブ７２の外径よりも大径の円形とされているが、孔２５は必ずしも円形である必要はなく、例えば、水平方向（押圧部材４による押圧方向）に長い長孔であってもよい。すなわち、孔２５は、押圧部材４による押圧方向の幅がスリーブ７２の外径よりも大きく形成すればよく、その形状は特に限定されるものではない。   Further, in the above-described embodiment, the hole 25 of the first frame member 20 is a circle having a larger diameter than the outer diameter of the sleeve 72 of the blind rivet 70. However, the hole 25 is not necessarily circular. For example, the long hole may be long in the horizontal direction (the pressing direction by the pressing member 4). That is, the hole 25 may be formed so that the width in the pressing direction by the pressing member 4 is larger than the outer diameter of the sleeve 72, and the shape thereof is not particularly limited.

さらに、第１のフレーム部材２０の孔２５の押圧方向の幅を、スリーブ７２の外径よりも大とする構成に代えて、第２のフレーム部材２１の孔３０の押圧方向の幅を、スリーブ７２の外径よりも大とする構成としてもよい。さらにまた、本発明は、第１のフレーム部材２０の孔２５と第２のフレーム部材２１の孔３０の双方の押圧方向の幅を、スリーブ７２の外径よりも大とすることを妨げない。   Furthermore, instead of the configuration in which the width in the pressing direction of the hole 25 of the first frame member 20 is larger than the outer diameter of the sleeve 72, the width in the pressing direction of the hole 30 of the second frame member 21 is changed to the sleeve. It is good also as a structure made larger than the outer diameter of 72. Furthermore, the present invention does not prevent the width in the pressing direction of both the hole 25 of the first frame member 20 and the hole 30 of the second frame member 21 from being larger than the outer diameter of the sleeve 72.

加えて、上述の実施形態では、第１のフレーム部材２０と第２のフレーム部材２１との仮止め及び締結にブラインドリベット７０を用いる構成について説明したが、それらのフレーム部材２０，２１の仮止め及び締結に用いる固定具としては、フレーム部材２０，２１が重なり合う接合部分を貫通した仮止め状態において、該貫通方向に沿ってハウジング２の外側から引き抜き可能であり、且つ、ハウジング２の外側からの所定の本止め操作により本止め可能なものであれば、ブラインドリベット以外の固定具を用いることもできる。   In addition, in the above-described embodiment, the configuration in which the blind rivet 70 is used for temporarily fixing and fastening the first frame member 20 and the second frame member 21 has been described. However, the frame members 20 and 21 are temporarily fixed. As a fixing tool used for fastening, in a temporarily fixed state in which the frame members 20 and 21 pass through the overlapping joint portion, the fixture can be pulled out from the outside of the housing 2 along the penetration direction, and from the outside of the housing 2 Fixing tools other than blind rivets can be used as long as they can be permanently locked by a predetermined locking operation.

電気二重層キャパシタの上方から見た外観を示す斜視図である。It is a perspective view which shows the external appearance seen from the upper direction of an electrical double layer capacitor. 電気二重層キャパシタの上方から見た外観を示す斜視図である。It is a perspective view which shows the external appearance seen from the upper direction of an electrical double layer capacitor. 電気二重層キャパシタの下方から見た外観を示す斜視図である。It is a perspective view which shows the external appearance seen from the downward direction of an electrical double layer capacitor. 天板を示す斜視図である。It is a perspective view which shows a top plate. 底板を示す斜視図である。It is a perspective view which shows a baseplate. パッケージセルを示す斜視図である。It is a perspective view which shows a package cell. パッケージセルを示す斜視図である。It is a perspective view which shows a package cell. ハウジングにセル積層体を収容した状態を示す斜視図である。It is a perspective view which shows the state which accommodated the cell laminated body in the housing. 第２のフレーム部材を第１のフレーム部材に組み付ける状態を示す分解斜視図である。It is a disassembled perspective view which shows the state which assembles | attaches a 2nd frame member to a 1st frame member. 第２のフレーム部材を第１のフレーム部材に仮止めした状態を示す斜視図である。It is a perspective view showing the state where the 2nd frame member was temporarily fixed to the 1st frame member. 図１０に示す状態の要部を拡大して示す断面図である。It is sectional drawing which expands and shows the principal part of the state shown in FIG. 第１のフレーム部材と第２のフレーム部材を締結する工程を示す断面図である。It is sectional drawing which shows the process of fastening a 1st frame member and a 2nd frame member.

符号の説明Explanation of symbols

１：電気二重層キャパシタ、
２：ハウジング、
３：セル積層体、
４：押圧部材、
２０：別のフレーム部材（第１のフレーム部材）、
２１：押圧部材によって押圧されるフレーム部材（第２のフレーム部材）、
７０：ブラインドリベット、
７２：スリーブ、
７４：スリーブのフランジ、
７６：スリーブの変形部分、
７８：シャフト、
８０：シャフトの大径部、
８２：シャフトの突出部分、
９０：リベッタ。 1: Electric double layer capacitor
2: Housing,
3: Cell laminate,
4: Press member,
20: Another frame member (first frame member),
21: A frame member (second frame member) pressed by the pressing member,
70: Blind rivet,
72: Sleeve,
74: Flange of sleeve,
76: Deformed part of the sleeve,
78: shaft,
80: Large diameter part of the shaft,
82: Projecting part of the shaft,
90: Riveter.

Claims (3)

複数のパッケージセルを所定の積層方向に積層してなるセル積層体と、該セル積層体を上記積層方向に平行または略平行な所定の押圧方向に押圧する押圧部材とを収容する略箱形のハウジングが、上記押圧部材によって押圧されるフレーム部材と、該フレーム部材に所定の固定具により締結される別のフレーム部材とを含む電気二重層キャパシタの製造方法において、
上記ハウジングに上記セル積層体と上記押圧部材とを収容するようにして、上記２つのフレーム部材の一方を他方の上記フレーム部材と締結可能な位置に配置し、上記２つのフレーム部材が重なり合う接合部分を上記固定具が上記押圧方向に対して直角または略直角な所定の貫通方向に貫通するように、且つ、該貫通方向に沿って上記ハウジングの外側から引き抜き可能なように、上記固定具を上記ハウジングの外側から上記接合部分へ差し込んで仮止めする仮止め工程と、
該仮止め工程の後に、電気二重層キャパシタの特性検査を行う検査工程と、
該検査工程において上記特性検査の結果が良好である場合に、上記ハウジングの外側からの所定の本止め操作により上記固定具を本止めして、上記接合部分において上記２つのフレーム部材を締結する締結工程とを含むことを特徴とする電気二重層キャパシタの製造方法。 A substantially box-shaped housing that accommodates a cell stack formed by stacking a plurality of package cells in a predetermined stacking direction, and a pressing member that presses the cell stack in a predetermined pressing direction parallel or substantially parallel to the stacking direction. In the method of manufacturing an electric double layer capacitor, wherein the housing includes a frame member pressed by the pressing member and another frame member fastened to the frame member by a predetermined fixture.
The cell stack and the pressing member are accommodated in the housing, and one of the two frame members is disposed at a position that can be fastened to the other frame member, and the two frame members overlap each other. The fixing tool so that it can be pulled out from the outside of the housing along the penetrating direction so that the fixing tool penetrates in a predetermined penetrating direction perpendicular to or substantially perpendicular to the pressing direction. A temporary fixing step of temporarily inserting into the joining portion from the outside of the housing;
After the temporary fixing step, an inspection step for inspecting the characteristics of the electric double layer capacitor;
When the result of the characteristic inspection is good in the inspection step, the fastening is fastened by a predetermined fastening operation from the outside of the housing, and the two frame members are fastened at the joining portion. And a process for producing the electric double layer capacitor. 上記固定具は、一端にフランジを備えたスリーブと、該スリーブの両端よりそれぞれ突出するように上記スリーブに内嵌されるとともに上記スリーブにおける上記一端とは反対側の端部より突出した突出部分に上記スリーブの内径よりも大径の大径部を有するシャフトとを含むブラインドリベットであり、
上記仮止め工程において、上記フランジが上記ハウジングの外側に露出するように且つ上記スリーブが上記２つのフレーム部材を貫通するように、上記２つのフレーム部材の上記接合部分にそれぞれ形成された連結用の孔に上記ブラインドリベットを差し込んで仮止めし、
上記締結工程において、上記スリーブの上記一端より上記ハウジングの外側に突出した上記シャフトの突出部分をリベッタで引き込むことで、上記ハウジングの内側に配置された上記スリーブの上記反対側の端部をその外径が拡大されるように上記シャフトの上記大径部で押し潰して変形させ、該スリーブの変形部分と上記フランジとで挟み込むことで上記２つのフレーム部材を締結することを特徴とする請求項１に記載の電気二重層キャパシタの製造方法。 The fixing device includes a sleeve provided with a flange at one end, and a protruding portion that is fitted into the sleeve so as to protrude from both ends of the sleeve and protrudes from an end opposite to the one end of the sleeve. A blind rivet including a shaft having a large diameter portion larger than the inner diameter of the sleeve,
In the temporary fixing step, the connecting portions respectively formed at the joint portions of the two frame members so that the flange is exposed to the outside of the housing and the sleeve penetrates the two frame members. Insert the blind rivet into the hole and temporarily fix it.
In the fastening step, the projecting portion of the shaft that protrudes from the one end of the sleeve to the outside of the housing is pulled by a riveter so that the opposite end portion of the sleeve disposed inside the housing is removed from the outside. 2. The two frame members are fastened by being crushed and deformed by the large-diameter portion of the shaft so that the diameter is increased, and sandwiched between the deformed portion of the sleeve and the flange. The manufacturing method of the electrical double layer capacitor as described in 2 .. 少なくとも一方の上記フレーム部材における上記連結用の孔の上記押圧方向の幅を、上記スリーブの外径よりも大となるように構成することを特徴とする請求項２に記載の電気二重層キャパシタの製造方法。   3. The electric double layer capacitor according to claim 2, wherein a width in the pressing direction of the connection hole in at least one of the frame members is configured to be larger than an outer diameter of the sleeve. Production method.
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