JP2008153607A - Electric double-layer capacitor electric storage device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated type electric double-layer capacitor cell that has a reference part capable of deciding the position, direction, and posture of installation precisely when arranging a plurality of laminated type electric double-layer capacitor cells for modularization, and dispenses with individually matching the positions of extraction electrodes when connecting adjacent extraction electrodes mutually. <P>SOLUTION: The electric double-layer capacitor cell has: a vessel made of a film material; an electrolyte and an electrode laminated held in the vessel; two extraction electrodes extracted from the electrode laminate to the outside of the vessel; an extraction electrode complex that is provided at the drawing-out port of the extraction electrode and has a support made of resin and the extraction electrode supported by the support made of resin. In this case, the support made of resin is nearly in a prism shape having upper and lower surfaces facing each other in parallel and front and rear faces facing each other in parallel. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a multilayer electric double layer capacitor cell and an electric double layer capacitor power storage device in which a plurality of multilayer electric double layer capacitor cells are connected.

  Capacitors can be repeatedly charged and discharged with a large current, and are promising as power storage devices with a high charge / discharge frequency.

  It is known that an electric double layer capacitor can be obtained by immersing a carbonaceous electrode in an organic electrolyte. Non-Patent Document 1, pages 34 to 37, an electric double layer capacitor having a tank partitioned into two sections by a separator, an organic electrolyte filled in the tank, and two carbonaceous electrodes immersed in each section Is described. Activated carbon or the like is used as the carbonaceous electrode. An organic electrolytic solution is a solution in which a solute is dissolved in an organic solvent.

  FIG. 1 is a view showing an appearance of a unit electrode of an electric double layer capacitor. This unit electrode 2 is a laminate of collector electrode 5 / polarizable electrode 6 / separator 7 / polarizable electrode 6 / collector electrode 5. The collector electrode 5 is usually formed of a metal foil. The unit electrode 2 is formed with a main body portion 14 and a lead portion 13 for connection. A multilayer electric double layer capacitor cell usually has a structure in which a plurality of such unit electrodes are stacked to form an electrode stack, and the electrode stack is housed in a container together with an electrolytic solution.

  The electrode laminate has a substantially hexahedral shape. In the present specification, when expressing a surface, the front and rear, upper, lower, left and right surfaces are identified and specified corresponding to the six surfaces of the electrode stack. That is, the surface perpendicular to the stacking direction of the electrode laminate is the front surface or the rear surface (the front surface and the rear surface do not need to be distinguished). Of the surfaces parallel to the lamination direction, the surface on which the lead portion is formed is the upper surface, the surface facing the upper surface in parallel is the lower surface, and the surface perpendicular to the upper surface among the surfaces parallel to the lamination direction is the right surface or the left surface ( It is not necessary to distinguish between the left side and the right side.)

  The width refers to the dimension between the front surface and the rear surface, the length refers to the dimension between the left surface and the right surface, and the height refers to the dimension between the upper surface and the lower surface.

  FIG. 2 is a cross-sectional view showing an example of the structure of the multilayer electric double layer capacitor cell. This cell has a container 1, an electrolytic solution (not shown) held in the container, and an electrode laminate 20. The container 10 is provided with a vent hole 3 and a gas vent valve 4.

  The extraction electrode 8 is extracted from the inside of the container 1 to the outside. The extraction electrode 8 is joined to the lead portion of the electrode laminate. The extraction electrode 8 is a conductive plate, for example, an aluminum plate, and the container 1 is a film material having solvent resistance, for example, a bag of an aluminum laminate film. The extraction port of the extraction electrode of the container 1 needs to prevent the electrolyte from flowing out and the outside air from entering while allowing the extraction electrode 8 to pass through.

  The electric double layer capacitor has a long service life and is used for a long time. Therefore, the electric double layer capacitor cell containing the organic electrolyte is required to completely seal the extraction port of the extraction electrode and to maintain the sealing for a long period of time.

  By the way, in order to use an electric double layer capacitor as a practical power storage device, it is known to modularize a plurality of stacked electric double layer capacitor cells together with a control circuit. Patent Document 1 describes an example of a voltage control method and a circuit suitable for use in such a power storage device.

  FIG. 3 is a diagram showing an external appearance of an electric double layer capacitor cell used for modularization. This electric double layer capacitor cell has extraction electrodes 153 and 154 and a container 152. The container 152 is formed by sandwiching an electrode laminate between two aluminum laminate films and bonding four sides. Here, the left side and the right side of the electrode laminate are bent vertically so that they can be conveniently stored. The extraction electrodes 153 and 154 are bent and formed so as to be convenient for mutual connection.

  The lead electrodes 153 and 154 are sandwiched and bonded between two aluminum laminate films. However, the aluminum laminate film is flexible and deforms freely. In addition, the extraction electrodes 153 and 154 are connected to the collector electrode inside the container 152, but the collector electrode is made of a metal foil and lacks rigidity. Therefore, the extraction electrodes 153 and 154 can move and are not fixed in position relative to the electrode stack.

  FIG. 4 is a view showing the appearance of an assembly of electric double layer capacitor cells. A plurality of electric double layer capacitor cells 151 are arranged in the stacking direction of the electrode stack, and lead electrodes 153 and 154 are connected to each other to form an assembly 150 of electric double layer capacitor cells.

  FIG. 5 is a diagram showing the external appearance of a power storage unit using an assembly of electric double layer capacitor cells. The power storage unit 12 generally includes a frame 140, a cell assembly 150, and an electric circuit unit 180. The electric circuit portion 180 includes a wiring board 181, a control circuit 183, a control terminal 184, a cable connection portion 185, and the like. Such a power storage unit is housed in an outer case to constitute an electric double layer capacitor power storage device. FIG. 6 is a diagram showing an appearance of the electric double layer capacitor power storage device.

  In the current electric double layer capacitor cell, the position of the extraction electrode is not fixed with respect to the electrode laminate. Therefore, when connecting adjacent extraction electrodes, it is necessary to individually align the positions of the extraction electrodes according to the connection method employed. Here, skill and labor are required for the alignment operation between the adjacent extraction electrodes. This is because the extraction electrode is connected to the collector electrode inside the container, so that freedom of movement is limited.

  Moreover, since the current electric double layer capacitor cell is formed of a film material, the outer shape is freely deformed. That is, there is no part or member that serves as a reference for defining the position and orientation when fixing the electric double layer capacitor cell. Therefore, it is difficult to accurately determine the installation position, direction, and orientation when a plurality of stacked electric double layer capacitor cells are arranged and modularized.

  Patent Document 2 describes an electric double layer capacitor cell having a sealing material for an electric double layer capacitor formed by integrally molding an electrode terminal and a pressure release means together with a synthetic resin. However, this sealing material has a smaller width than the electrode laminate. Therefore, when a plurality of the electric double layer capacitor cells are arranged in the stacking direction of the electrode laminate, the front and rear surfaces of the adjacent electrode laminates face each other, but the front and rear surfaces of the adjacent sealing materials face each other. There will be no.

Then, when using for the use which modularizes the electric double layer capacitor cell of patent document 2, the position and direction of a sealing material are not fixed, and when connecting adjacent extraction electrodes, the position of extraction electrodes is still. It is necessary to coordinate individually. Furthermore, it is difficult to use the upper surface of the sealing material whose position and direction are not fixed as a positioning reference.
JP 2000-78765 A JP 2006-165417 A JP-A-6-261442 Ikuo Okamura "Electric Double Layer Capacitor and Power Storage System" 3rd Edition, Nikkan Kogyo Shimbun, 2005

  The present invention solves the above-mentioned conventional problems, and its object is to accurately determine the position, direction, and orientation of installation when a plurality of stacked electric double layer capacitor cells are arranged into a module. It is an object of the present invention to provide a multilayer electric double layer capacitor cell that has a reference portion that can be used and that does not require the positions of the extraction electrodes to be individually matched when connecting adjacent extraction electrodes.

The present invention includes a container made of a film material,
An electrolyte and an electrode laminate held in the container;
At least two extraction electrodes drawn out of the container from the electrode laminate;
An electric double layer capacitor cell comprising a resin support and an extraction electrode composite having an extraction electrode supported by the resin support, provided at the extraction electrode outlet,
The resin support has a substantially prismatic shape having upper and lower surfaces facing in parallel and front and rear surfaces facing in parallel, the upper surface, front surface and rear surface are flat, and the width of the upper surface is an electrode laminate. The width of
The extraction electrode has an intermediate portion embedded in the resin support, leaving the connection portion at the top and bottom,
The film material provides an electric double layer capacitor cell that is bonded to the peripheral side surface of a resin support.

Further, the present invention is an electric double layer capacitor power storage device having an assembly of electric double layer capacitor cells in which a plurality of the electric double layer capacitor cells are arranged and connected in the stacking direction of the electrode stack,
In the assembly, the width of each electric double layer capacitor cell is defined by the front and rear surfaces of the adjacent extraction electrode composites being in contact with each other, and the upper surfaces of the respective resin supports form a plane. An electric double layer capacitor power storage device is provided.

  When the electric double layer capacitor cell of the present invention is used to arrange a plurality of stacked electric double layer capacitor cells into a module, the installation position, direction and orientation can be accurately determined. When connecting, it is not necessary to individually align the positions of the extraction electrodes.

  FIG. 7 is a view showing the appearance of an extraction electrode composite as an example of the present invention. This extraction electrode composite has a resin support 21 and an extraction electrode 22 supported by the resin support. The middle part of the extraction electrode 22 is embedded in the resin support 21, and the upper and lower ends are exposed. One of the exposed end portions 23 is electrically connected to the electrode laminate in the container.

  When the extraction electrode is embedded in the resin, the resin can wrap around to the side surfaces at both ends of the extraction electrode, and as a result, the peripheral side surfaces of the extraction electrode are in close contact with the resin. Therefore, the cell is completely sealed also on the side surfaces at both ends of the extraction electrode. It has been very difficult to completely seal the side surfaces at both ends of the extraction electrode for a long period of time with a conventional electrode extraction port having a structure in which the extraction electrode is laminated from both main side surfaces.

  The resin support is made of a resin excellent in insulation and chemical stability, preferably a hard plastic. When the resin support is hard, the electrode electrode outlet of the cell is difficult to be deformed and can resist stress, so that the sealing performance is further improved.

  More preferably, the resin support is made of a thermoplastic resin having excellent crystallinity. This is because a resin excellent in crystallinity is excellent in durability against an organic electrolyte, and a thermoplastic resin is easy to embed the extraction electrode. Examples of such resins include polybutylene terephthalate, polypropylene, polyphenylene sulfide and the like. It is particularly preferable that the resin support is made of the same material as the inner film of the aluminum laminate film because adhesion to the container is improved. Further, the resin may be alloyed to achieve both adhesion and heat resistance during the process.

  The resin support preferably has a shape in which the upper surface, front surface, and rear surface have a certain area, for example, a substantially block shape or a substantially prismatic shape. The substantially prismatic shape refers to a shape in which the upper surface and the front and rear surfaces are substantially perpendicular. This is because such a shape makes it easy to maintain the strength of the entire composite and also improves the adhesion to the extraction electrode.

  Moreover, the upper surface, the front surface, and the rear surface are flat, and the width of the upper surface is equal to or greater than the width of the electrode stack. When the width of the upper surface is equal to or larger than the width of the electrode stack, a plurality of electric double layer capacitor cells are arranged in the stacking direction of the electrode stack, that is, the front surface of one capacitor cell and the rear surface of another capacitor cell are in contact with each other. When stacked in this manner, the front surface and the rear surface of the adjacent extraction electrode composites face each other.

  When the front surface and the rear surface of the resin support have a certain area, and the upper surface and the front and rear surfaces are substantially perpendicular, the front surface and the rear surface of the adjacent extraction electrode complex face each other, so that the extraction electrode complex The direction and posture are determined accurately. Furthermore, the upper and lower positions of the extraction electrode composite can be accurately determined by aligning the upper surfaces of the adjacent resin supports on one plane.

  The extraction electrode is fixed to the extraction electrode complex, and the position of the extraction electrode is also accurately determined by accurately determining the position of the extraction electrode complex. As a result, it is not necessary to individually align the positions of the extraction electrodes when connecting adjacent extraction electrodes.

  The width of the resin support is appropriately determined, for example, up to 50 mm, for example, 10 to 40 mm, preferably 15 to 30 mm. The length is appropriately determined between 50 and 150 mm and the height between 5 and 20 mm. A through hole 34 may be provided in a part of the support, and a gas vent valve may be installed in the through hole. If it does so, the effort which directly provides a vent hole in a container or attaches a gas vent valve can be saved.

  The extraction electrode 32 is a conductive plate, typically a high purity aluminum plate. Although the dimension of an extraction electrode is not specifically limited, For example, it determines suitably between 15-100 mm in length, 5-50 mm in width, and 0.1-1 mm in thickness.

  The extraction electrode composite is preferably formed by an insert molding method. The insert molding method refers to a method in which an insert product (in this case, an extraction electrode) is loaded into a mold, and then a resin is injected and the insert product is wrapped in a molten resin and solidified to produce an integrated composite part. . By wrapping the extraction electrode with a molten resin, the adhesion between the electrode surface and the resin is improved, and a more complete long-life sealing is possible.

  Before performing the insert molding, the surface of the extraction electrode may be subjected to an easy adhesion treatment. The easy adhesion treatment refers to a treatment for improving the adhesion of the surface of the extraction electrode to the resin.

  FIG. 8 is a view showing the appearance of an extraction electrode composite as another example of the present invention. This lead electrode composite has a resin support 31, a lead electrode 32 supported by the resin support, and a capacitor cell control circuit 35. The extraction electrode 32 has an intermediate portion embedded in the resin support 31, and both upper and lower end portions are exposed. One of the exposed end portions 33 is electrically connected to the electrode material laminate in the container.

  In general, a circuit board is required to connect a control circuit to the electrodes of a capacitor cell. The capacitor cell is mainly composed of a soft aluminum laminate film bag and cannot support the circuit board. Therefore, the circuit board needs to be separately fixed to a structural material such as an outer case of the capacitor cell.

  The operation of connecting the control circuits to the capacitor cells one by one and fixing the circuit board to the exterior case is complicated, and the number of assembly steps for modularizing the plurality of capacitor cells is very large. Naturally, the quality of the module is likely to vary, and the yield is also reduced.

  Therefore, if the control circuit is integrated into the capacitor cell, installation of the circuit board can be omitted when the plurality of capacitor cells are modularized, and the work of modularizing the plurality of capacitor cells is simplified.

  Examples of the control circuit for the electric double layer capacitor cell include a voltage balance equalization circuit and a charge limiting circuit. Specifically, a voltage balance equalization circuit formed by connecting a Zener diode and a resistor in series, a voltage limiting circuit described in Patent Document 1, Patent Document 3, and Non-Patent Document 1, pages 150 to 155 are described. Charging limit circuit (for example, so-called parallel monitor). However, the control circuit 35 is not limited to this example.

  FIG. 9 is a diagram for explaining an example of a method for producing such an extraction electrode composite. The meanings of the symbols in FIG. 9 are the same as those in FIG. First, an appropriate control circuit 35 or its substrate is connected to the extraction electrode 32 to form an electrode module (FIG. 9A). The connection between the two may be performed, for example, by caulking, screw fastening, resistance welding, or the like. When the control circuit 35 has sufficient heat resistance with respect to the melting temperature of the resin, the molten resin is injected around the electrode module and insert molding of the resin support 31 is performed (FIG. 8). .

  When the control circuit 35 is inferior in heat resistance, first, the control circuit 35 is covered with a thermosetting resin layer 36, and is cured by heating (FIG. 9B). Thereafter, molten resin is poured around the electrode module, and insert molding of the resin support 31 is performed (FIG. 9C). At this time, the thermosetting resin layer may not be completely enclosed, and a part of the layer may be exposed to the outside of the molten resin. Thereby, the gas generated at the time of injecting the high-temperature resin is allowed to escape, and stable molding processing becomes possible.

  As the thermosetting resin, a resin having a curing temperature not higher than the heat resistance temperature of the control circuit 35, for example, 180 ° C. or lower, for example, an epoxy resin for electronic circuit sealing or the like is used. If the control circuit 35 is previously coated with the thermosetting resin layer 36, the thermosetting resin layer 36 protects the control circuit 35 from the heat of the molten resin, and deterioration of the control circuit 35 due to heat is prevented. .

  FIG. 10 is a diagram for explaining another example of the method for producing such an extraction electrode composite. The meanings of the symbols in FIG. 10 are the same as those in FIG. In this method, first, an electrode module is formed in the same manner as described above (FIG. 10A). Using this electrode module, insert molding is performed by injecting resin so that the molten resin does not contact the control circuit 35 (FIG. 10B). Thereafter, if necessary, the control circuit 35 is covered with a thermosetting resin layer 36, cured and sealed (FIG. 10C). As the thermosetting resin, a resin having a curing temperature not higher than the heat resistance temperature of the control circuit 35, for example, 180 ° C. or lower, for example, an epoxy resin for electronic circuit sealing or the like is used.

  A multilayer electric double layer capacitor cell can be assembled according to a conventional method except that the obtained lead electrode composite is used and the inner surface of an aluminum laminate film as a container is adhered to the periphery of a resin support.

  For example, first, an electrode laminate is prepared. Next, the extraction electrode of the extraction electrode composite is joined to the lead portion of the electrode laminate. Joining is performed by methods such as ultrasonic welding and spot welding so as to ensure good conductivity and not damage the lead portion.

  The main body of the electrode laminate is immersed in an electrolytic solution and stored in a container. The container is a film material having a solvent resistance, preferably an aluminum laminate film having a metal intermediate layer (aluminum layer) between resin films (for example, a polypropylene layer, an aluminum layer, and a polyethylene terephthalate layer from the inside). The one formed by At the time of storage, the extraction electrode is projected outside from the opening of the container. Then, the container is sealed in a clean and dry atmosphere. At the time of sealing, the inner side surface of the aluminum laminate film as a container is brought into contact with the peripheral side surface of the resin support, and the resin support and the inner resin layer of the aluminum laminate film are welded. The welding may be performed by heating and pressing. FIG. 11 is a view showing an appearance of an electric double layer capacitor cell which is an example of the present invention.

  The container is preferably a structure formed by bending a continuous single-leaf film material so as to have a flat bottom surface capable of accommodating the electrode laminate. As shown in FIGS. 12A to 12C, such a laminate film structure 210 has an opening 214 and a substantially flat surface opposite to the opening 214, that is, does not have a margin for attaching a film material, It is formed as a bag-like structure having a bottom surface 216.

  The shapes of the opening 214 and the bottom surface 216 are formed in a boat shape in accordance with the width and length of the electrode laminate and the dimensions of the film material. As shown in FIG. 12D, the top surface shape of the resin support of the extraction electrode composite is preferably formed in a ship shape that matches the shape of the bottom surface 216. In this case, the width w of the upper surface of the resin support is substantially the same as the width of the electrode laminate, and the length l of the rectangular portion included in the upper surface is substantially the same as the length of the electrode laminate.

  This is because when a plurality of electric double layer capacitor cells are arranged and fixed, the strain force applied to each cell is reduced. Further, as shown in FIG. 13, the capacitor element 230 can be easily inserted into the laminated film structure 210 through the opening 214, and the assembly workability of the electric double layer capacitor cell is remarkably improved. Is done.

  The laminate film 212 constituting the laminate film structure 210 has a rectangular shape, and is disposed at the center regions 218a and 218b disposed above and below in FIG. 14, the bottom region 220 disposed therebetween, and the left and right in FIG. A pair of end regions 222a and 222b. A laminate film 212 shown in FIG. 14 is processed so as to be folded along a dashed line and valley folded along a broken line. Specifically, the laminate film 212 has, but is not limited to, a physical shape or character that makes it easy to bend a line or a groove along the one-dot chain line and the broken line in FIG. Alternatively, the chemical or structural composition of the region along the alternate long and short dash line and the broken line is partially changed to make it easy to bend similarly.

  The continuous one-leaf laminated film 212 processed in this way is folded back so that the end regions 222a and 222b overlap with each other around the bottom surface region 220 as shown by the arrow in FIG. 14, that is, as shown in FIG. The region is bent along the alternate long and short dash line, and then the region located on the left and right sides of the end regions 222a and 222b (the end region surrounded by the broken line and the solid line) is thermally welded.

  An electric double layer capacitor power storage device in which a plurality of stacked electric double layer capacitor cells are connected can be assembled according to a conventional method except that the obtained electric double layer capacitor cell is used. The operation of arranging and fixing the plurality of electric double layer capacitor cells is preferably performed using the upper surface of the resin support as a reference surface for determining the position of each electric double layer capacitor cell. That is, the position of each electric double layer capacitor cell is determined so that the upper surfaces of the adjacent resin supports are aligned on one plane.

  FIG. 15 is a view showing the appearance of an assembly of electric double layer capacitor cells. In addition, the label of the film material constituting the container is omitted. A plurality of electric double layer capacitor cells 131 are arranged in the stacking direction of the electrode stack, and the positions of adjacent lead electrodes 133 and 134 are aligned. The width of each electric double layer capacitor cell is defined by the front and rear surfaces of the adjacent extraction electrode composites being in contact with each other, and the upper surfaces of the respective resin supports form together to form a plane.

  FIG. 16 is a partially enlarged cross-sectional view illustrating an example of an aspect in which the front surface and the rear surface of adjacent extraction electrode composites are in contact with each other. A mode in which the front surface and the rear surface of the adjacent extraction electrode composites are appropriately selected in consideration of the required positioning accuracy. For example, the film materials 43 and 44 may be interposed between the adjacent resin supports 41 and 42 (FIG. 16A), and the shape of the adjacent resin supports 41 and 42 is the film material 43. , 44 may be corrected (FIG. 16B).

  FIG. 17 is a partially enlarged cross-sectional view showing another example of a mode in which the front surface and the rear surface of adjacent extraction electrode composites are in contact with each other. Adjacent resin supports 41 and 42 may be provided with concaves and convexes that fit together to facilitate positioning (FIGS. 17A and 17B).

  In addition, the upper surface of the electric double layer capacitor cell assembly is used as a reference surface for determining the position of fixing and installation in the process of assembling the electric double layer capacitor power storage device, such as welding work of the extraction electrode. Convenient to.

It is a figure which shows the external appearance of the unit electrode of an electric double layer capacitor. It is sectional drawing which shows an example of the structure of a multilayer type electric double layer capacitor cell. It is a figure which shows the external appearance of the electric double layer capacitor cell used for the use made into a module. It is a figure which shows the external appearance of the aggregate | assembly of an electric double layer capacitor cell. It is a figure which shows the external appearance of the electrical storage unit using the aggregate | assembly of an electric double layer capacitor cell. It is a figure which shows the external appearance of an electrical double layer capacitor electrical storage apparatus. It is a figure which shows the external appearance of the extraction electrode composite_body | complex which is an example of this invention. It is a figure which shows the external appearance of the extraction electrode composite_body | complex which is another example of this invention. It is a figure explaining an example of the manufacturing method of an extraction electrode composite_body | complex. It is a figure explaining the other example of the manufacturing method of an extraction electrode composite_body | complex. It is a figure which shows the external appearance of the electric double layer capacitor cell which is an example of this invention. It is the front view of a laminated film structure preferable as a container, a side view, a bottom view, and a top view of a preferable extraction electrode composite. It is a perspective view which shows a mode that a capacitor element is inserted in a laminate film structure. It is an expanded view of the laminate film which comprises a preferable laminate film structure as a container. It is a figure which shows the external appearance of the aggregate | assembly of an electric double layer capacitor cell. It is the partially expanded sectional view which showed the example of the aspect which the front surface and back surface of an adjacent extraction electrode composite_body | combination face. It is the partially expanded sectional view which showed the example of the aspect which the front surface and back surface of an adjacent extraction electrode composite_body | combination face.

Explanation of symbols

  21, 31, 41, 42 ... resin support; 22, 32 ... extraction electrode; 23, 33 ... exposed end; 24, 34 ... through hole; 35 ... control circuit; 43, 44 ... film material; 11 ... Housing; 12 ... Power storage unit; 100 ... Container; 120 ... Lid; 122 ... Main terminal; 140 ... Frame; 141 ... Bottom plate; 142 ... End frame; 143 ... Side frame; 151 ... Electric double layer capacitor cell, 152 ... Container; 153, 154 ... Lead electrode; 161 ... Connection terminal; 165 ... Cable connection; 168 ... Cable; 180 ... Electric circuit part; 181 ... Wiring board; ... parallel monitor; 184 ... control terminal; 210 ... laminate film structure; 212 ... laminate film; 214 ... opening; ; 222a, 222b ... end region; 230 ... capacitor element.

Claims (4)

A container made of a film material;
An electrolyte and an electrode laminate held in the container;
At least two extraction electrodes drawn out of the container from the electrode laminate;
An electric double layer capacitor cell comprising a resin support and an extraction electrode composite having an extraction electrode supported by the resin support, provided at the extraction electrode outlet,
The resin support has a substantially prismatic shape having upper and lower surfaces facing in parallel and front and rear surfaces facing in parallel, the upper surface, front surface and rear surface are flat, and the width of the upper surface is an electrode laminate. The width of
The extraction electrode has an intermediate portion embedded in the resin support, leaving the connection portion at the top and bottom,
The electric double layer capacitor cell, wherein the film material is bonded to a peripheral side surface of a resin support.   The electric double layer capacitor cell according to claim 1, further comprising a control circuit connected between the two extraction electrodes and embedded in the resin support.   2. The electric double layer capacitor cell according to claim 1, wherein the extraction electrode composite does not have protrusions other than the extraction electrode on the upper surface of the resin support. 3. An electric double layer capacitor power storage device comprising an assembly of electric double layer capacitor cells in which a plurality of electric double layer capacitor cells according to any one of claims 1 to 3 are arranged and connected in the stacking direction of an electrode stack. ,
In the assembly, the width of each electric double layer capacitor cell is defined by the front and rear surfaces of the adjacent extraction electrode composites being in contact with each other, and the upper surfaces of the respective resin supports form a plane. An electric double layer capacitor power storage device.

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