JP2002246278A - Multilayered body, its producing system and method, and electric double layer capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multilayered body in which trouble due to positional shift of an electrode foil can be suppressed, its producing system and method, and an electric double layer capacitor. SOLUTION: The multilayered body 3 for electric double layer capacitor comprises a plurality of sheet-like plus electrode foils 11, minus electrode foils 12 of the same number of sheets as the plus electrode foils 11, and a separator 13 wound to hold these electrode foils 11 and 12 in insulated state. The plus and minus electrode foils 11 and 12 are arranged alternately sheet by sheet to face each other. More specifically, the plus and minus electrode foils 11 and 12 are clamped by the wound separator 3 not to cause positional shift.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to a technical field including a laminated body, a manufacturing apparatus and a manufacturing method thereof, and an electric double layer capacitor.

[0002]

2. Description of the Related Art Generally, an electric double layer capacitor having a laminated body is known. The laminate is configured by laminating a sheet-like positive electrode foil and a sheet-like negative electrode foil via, for example, a sheet-like separator. Each of the electrode foils includes a substantially rectangular electrode foil main body and a current collecting lead extending from the electrode foil main body. Then, the current collecting leads are grouped for each same pole and then joined to the electrode terminals, thereby forming an electric double layer capacitor. It is generally considered difficult to automatically produce such a laminate.

On the other hand, as a method for automatically manufacturing a laminate, there is a method disclosed in Japanese Patent Application Laid-Open No. 2000-348978, for example. That is, the band-shaped separator is bent in the opposite directions at a predetermined interval by performing a fold forming step in advance, thereby forming the first fold and the second fold. Further, the separator having the folds formed as described above is supplied into the case corresponding to the lamination position. In this case, the plus electrode foil and the minus electrode foil are inserted alternately between the separators facing each other via the first fold and between the separators facing each other via the second fold. As described above, this publication discloses a method in which a so-called separator is folded in a so-called zigzag manner.

[0004]

However, the method disclosed in the above publication has the following problems. First, before the separator is supplied, a fold is formed in advance. In this case, if the separator is made of a resin film or a material that is relatively difficult to fold, such as a nonwoven fabric, However, there is a possibility that a problem that a fold cannot be reliably formed may occur.

Second, when the lamination is completed, it is necessary to fix by some means (for example, a tape or the like) so that the separators and the like do not fall apart. It is necessary to once take out the laminate from the case. However, at the time of such removal, since both electrode foils are merely sandwiched between the separators, there is a possibility that the electrode foils which are positioned at an angle may be displaced.

Third, the above-mentioned method requires an apparatus for separately forming a fold on the separator, which may increase the size and complexity of the manufacturing equipment.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object a laminated body, a manufacturing apparatus and a manufacturing method thereof, and an electric double layer capacitor capable of suppressing a problem due to a displacement of an electrode foil. Providing is one of the main purposes.

[0008]

Means for Solving the Problems and Effects There will be described below characteristic means for achieving the above object. Also,
For each means, characteristic actions and effects will be described as necessary.

Means 1. A band-shaped separator wound by a predetermined amount and a plurality of plus electrode foils and a plurality of sheets arranged one by one so as to be insulated from each other by being sandwiched by the wound separator. A laminate comprising: a negative electrode foil.

According to the first aspect, the plus and minus electrode foils are sandwiched between the wound separators, so that they are kept insulated from each other. Thus, each electrode foil is firmly held by the separator, and is less likely to be displaced. Further, since the separator is wound up, the outer periphery of the laminate can be easily fixed. Furthermore, since a bending mechanism or the like is not required when manufacturing such a laminate, it is possible to suppress an increase in the size and complexity of the equipment. In some cases, there is an advantage that many existing facilities such as a winding device can be used.

Means 2. A band-shaped separator wound up by a predetermined amount so as to have a flat surface or a substantially flat surface facing each other, of the wound-up separator, being sandwiched by a portion corresponding to the flat surface or the substantially flat surface. A laminate comprising a plurality of positive electrode foils and a plurality of negative electrode foils alternately arranged one by one so as to maintain an insulating state with each other.

According to the means 2, the positive and negative electrode foils are sandwiched by the wound separators, so that the insulating state is maintained. In this manner, each electrode foil is firmly held by a portion corresponding to a flat surface or a substantially flat surface of the separator,
It is hard to cause displacement. Further, since the separator is wound up, the outer periphery of the laminate can be easily fixed. Furthermore, since a bending mechanism or the like is not required when manufacturing such a laminate, it is possible to suppress an increase in the size and complexity of the equipment. In some cases, there is an advantage that many existing facilities such as a winding device can be used.

Means 3. A plurality of sheet-shaped positive electrode foils, a plurality of sheet-shaped negative electrode foils, and a band-shaped coil wound from a longitudinally intermediate portion to hold the positive and negative electrode foils in an insulated state from each other. And a separator, wherein the positive electrode foil and the negative electrode foil are alternately arranged without being bent or bent by being sandwiched by the separator one by one.

According to the means 3, the plus electrode foil and the minus electrode foil are sandwiched one by one by the strip-shaped separator wound up from the middle part in the longitudinal direction, and are alternately arranged. Thus, each electrode foil is firmly held by the separator, and is less likely to be displaced. Further, since the separator is wound up, the outer periphery of the laminate can be easily fixed. Furthermore, since a bending mechanism or the like is not required when manufacturing such a laminate, it is possible to suppress an increase in the size and complexity of the equipment. In some cases, there is an advantage that many existing facilities such as a winding device can be used. At the same time, since the electrode foil is not bent or bent, it is possible to prevent problems such as cracks due to concentration of stress on the bent or bent portion.

Means 4. The laminate according to any one of means 1 to 3, wherein the outermost peripheral side is configured to be surrounded by a separator, and an edge of the separator is fixed to a non-edge.

According to the means 4, the outermost peripheral side is surrounded by the separator, and the edge of the separator is fixed to the non-edge. Here, since the separator is wound, the fixing can be easily performed.

Means 5. The positive electrode foil and the negative electrode foil each have a current collecting lead that can protrude in the width direction of the separator, and the current collecting leads on the positive electrode foil side are configured to project together from a predetermined side. 5. The laminated body according to any one of means 1 to 4, wherein the current collecting leads are configured to project together from a side separated from the predetermined side.

According to the means 5, since the current collecting leads on the positive electrode foil side collectively protrude from the predetermined side, and the current collecting leads on the negative electrode foil side collectively protrude from the side separated from the predetermined side. It is easy to bundle each collecting lead. Therefore, when manufacturing a product using the laminate, the function of the current collecting lead can be easily and reliably exhibited.

Means 6 In order to wind at least the strip-shaped separator, a core provided rotatably, and a sheet-shaped plus electrode foil and a minus electrode foil in predetermined portions of the separator in the middle of the winding, respectively, and the core has a predetermined amount. After covering the outermost peripheral side with a separator, and an electrode foil supply means capable of supplying one sheet each time it is rotated,
An apparatus for manufacturing a laminate, comprising: fixing means for fixing an edge portion of a separator.

According to the means (6), at least the strip-shaped separator is wound by rotating the core. A sheet-like positive electrode foil and a negative electrode foil are respectively supplied to predetermined portions of the separator in the middle of winding by the electrode foil supply means each time the core is rotated by a predetermined amount. Then, after the outermost peripheral side is covered with the separator, the edge of the separator is fixed by the fixing means. In this manner, each electrode foil is firmly held by the wound separator, and is less likely to be displaced. Further, since the separator is wound up, it can be easily fixed by the fixing means. Further, when manufacturing such a laminate, a separate bending mechanism or the like is not required, so that an increase in size and complexity of the equipment can be suppressed. In some cases, there is an advantage that many existing facilities such as a winding device can be used.

Means 7. In order to wind at least the strip-shaped separator, a core provided rotatably, and a sheet-shaped plus electrode foil and a minus electrode foil in a predetermined portion of the separator in the middle of the winding, respectively, and the core has a predetermined amount. An electrode foil supply means capable of supplying one sheet each for each rotation, and pressing the supplied plus and minus electrode foils so as not to shift when the core is rotated by the predetermined amount. An apparatus for manufacturing a laminate, comprising: a pressing means; and a fixing means for fixing an edge of a separator after covering the outermost peripheral side with a separator.

According to the means 7, by rotating the winding core, at least the strip-shaped separator is wound up. A sheet-like positive electrode foil and a negative electrode foil are respectively supplied to predetermined portions of the separator in the middle of winding by the electrode foil supply means each time the core is rotated by a predetermined amount. When the winding core is rotated by the predetermined amount, the pressing means presses the supplied plus electrode foil and the supplied negative electrode foil so as not to shift. Then, after the outermost peripheral side is covered with the separator, the edge of the separator is fixed by the fixing means. In this manner, each electrode foil is firmly held by the wound separator, and is less likely to be displaced. Further, since the separator is wound up, it can be easily fixed by the fixing means.
Furthermore, when manufacturing such a laminate, a separate bending mechanism or the like is not required, so that it is possible to suppress an increase in the size and complexity of the equipment. In some cases, there is an advantage that many existing facilities such as a winding device can be used.

Means 8. At least a strip-shaped separator, a plate-shaped or substantially plate-shaped core having a flat surface or a substantially flat surface facing each other and rotatably provided, and the flat surface of the separator in the middle of the winding. Or an electrode foil supply means capable of supplying a sheet-shaped plus electrode foil and a minus electrode foil to predetermined portions corresponding to substantially flat surfaces, respectively, each time the core is rotated by 180 degrees, When the core is rotated by 180 degrees, the pressing means for pressing the supplied plus electrode foil and the minus electrode foil so as not to shift, and covering the outermost peripheral side with the separator, and then fixing the edge of the separator. An apparatus for manufacturing a laminate, comprising: fixing means.

According to the means 8, the plate-shaped or substantially plate-shaped core having the flat surface or the substantially flat surface facing each other is rotated, so that at least the strip-shaped separator is wound in a flat shape. A sheet-like plus electrode foil and a minus electrode foil are respectively provided on predetermined portions corresponding to the flat surface or the substantially flat surface of the separator in the middle of winding, and each time the winding core is rotated by 180 degrees, the electrode foil is supplied. Each sheet is supplied by means. When the winding core is rotated by 180 degrees, the supplied positive electrode foil and the supplied negative electrode foil are pressed by the pressing means so as not to shift. Then, after the outermost peripheral side is covered with the separator, the edge of the separator is fixed by fixing means. Thus, each electrode foil is a separator
It is firmly held by a flat surface or a portion corresponding to a substantially flat surface, and is less likely to be displaced. Also,
Since the separator is wound up, it can be easily fixed by the fixing means. Furthermore, since a bending mechanism or the like is not required when manufacturing such a laminate, it is possible to suppress an increase in the size and complexity of the equipment.
In some cases, there is an advantage that many existing facilities such as a winding device can be used.

Means 9 The pressing means includes a roller capable of pressing the supplied positive electrode foil through a separator, and a roller capable of pressing the supplied negative electrode foil through a separator. 9. The apparatus for manufacturing a laminate according to the means 7 or 8, wherein:

According to the means 9, the supplied positive electrode foil and the supplied negative electrode foil are pressed by the rollers constituting the pressing means via the separators.
The rolling operation of the roller can suppress a load on the electrode foil and the separator, and can prevent the electrode foil and the separator from being damaged.

Means 10. The apparatus for manufacturing a laminate according to any one of means 6 to 9, wherein the core has a slit capable of guiding the separator.

According to the means 10, the separator is initially guided by the slit of the winding core, and the winding can be performed easily and reliably.

Means 11. The positive electrode foil and the negative electrode foil each have a current collecting lead that can protrude in the width direction of the separator, and the electrode foil supply unit is configured such that the current collecting leads on the positive electrode foil side collectively protrude from a predetermined side. Means 6 to 6 characterized in that the positive electrode foil and the negative electrode foil can be supplied so that the current collecting leads on the negative electrode foil side collectively protrude from the side separated from the predetermined side. An apparatus for manufacturing a laminate according to any one of claims 10 to 13.

According to the means (11), the current collecting leads on the positive electrode foil side are integrally protruded from the predetermined side by the electrode foil supply means, and the current collecting leads on the negative electrode foil side are collectively protruded from the predetermined side. It is made to protrude from the side which separates. Therefore, it is easy to bundle the current collecting leads. Therefore, when manufacturing a product using the laminate, the function of the current collecting lead can be easily and reliably exhibited.

Means 12 The electrode foil supply means includes a plus electrode foil supply means that can supply only a plus electrode foil and a minus electrode foil supply means that can supply only a minus electrode foil. An apparatus for manufacturing a laminate according to any one of the above.

According to the means 12, only the plus electrode foil is supplied by the plus electrode foil supply means, and only the minus electrode foil is supplied by the minus electrode foil supply means. For this reason, supply can be performed more easily and reliably.

Means 13 A winding step of winding a strip-shaped separator around a rotatably provided core, and a sheet-shaped plus electrode foil and a minus electrode foil each at a predetermined portion of the partially wound separator. A supply step of supplying, and rotating the winding core by a predetermined angle while keeping the supplied plus electrode foil and minus electrode foil from shifting, and using the separator wound by the rotation, the plus electrode foil and the minus electrode foil. A holding step of holding the electrode foil, by repeating the supply step and the holding step a predetermined number of times, winding up the separator while alternately holding the plus electrode foil and the minus electrode foil, furthermore, A method for producing a laminate, comprising: after covering an outer peripheral side with a separator, fixing an edge portion of the separator, and removing the separator from a core.

According to the means 13, the belt-shaped separator is wound around the core by rotating the core during the winding step. In the supply step, a sheet-like positive electrode foil and a negative electrode foil are supplied one by one to a predetermined portion of the partially wound separator. Further, in the holding step, the winding core is rotated by a predetermined angle so that the supplied positive electrode foil and negative electrode foil do not shift, and the positive electrode foil and the negative electrode foil are rotated by the wound separator. Will be retained. And
By repeating the supply step and the holding step a predetermined number of times, the separator is wound up while the plus electrode foil and the minus electrode foil are alternately held, and further, after the outermost peripheral side is covered with the separator, the separator The edge is fixed and removed from the core to produce a laminate. Thus, each electrode foil is firmly held by the separator, and is less likely to be displaced. Further, since the separator is wound up, the edge portion can be easily fixed. Furthermore, since a bending mechanism or the like is not required when manufacturing such a laminate, it is possible to suppress an increase in the size and complexity of the equipment. In some cases, there is an advantage that many existing facilities such as a winding device can be used.

Means 14. For a plate-shaped or substantially plate-shaped core having a flat surface or a substantially flat surface facing each other, which is rotatably provided, a winding step of winding a band-shaped separator, and a part of the wound separator. A supplying step of supplying a sheet-like positive electrode foil and a negative electrode foil one by one to portions corresponding to the flat surface or the substantially flat surface, respectively, so that the supplied positive electrode foil and the supplied negative electrode foil do not shift. While the core is 180 degrees or approximately 1
And a holding step of holding the plus electrode foil and the minus electrode foil with a separator wound by the rotation, and repeating the supply step and the holding step a predetermined number of times. The separator is wound up while alternately holding the electrode foil and the negative electrode foil.Furthermore, after covering the outermost peripheral side with the separator, the edge of the separator is fixed and removed from the core. A method for manufacturing a laminate.

According to the means 14, during the winding step,
By rotating a plate-like or substantially plate-shaped core having a flat surface or a substantially flat surface facing each other, a strip-shaped separator is wound around the core. In the supply step, a sheet-like positive electrode foil and a negative electrode foil are supplied one by one to portions corresponding to the flat surface or the substantially flat surface of the partially wound separator. Further, in the holding step, the winding core is rotated by 180 degrees or approximately 180 degrees so that the supplied plus electrode foil and minus electrode foil do not shift, and by the rotation, the plus electrode foil and The negative electrode foil is held. And
By repeating the supply step and the holding step a predetermined number of times, the separator is wound up while the plus electrode foil and the minus electrode foil are alternately held, and further, after the outermost peripheral side is covered with the separator, the separator The edge is fixed and removed from the core to produce a laminate. As described above, each electrode foil is firmly held by the portion corresponding to the flat surface or the substantially flat surface of the separator, and is less likely to be displaced. Further, since the separator is wound up, the edge portion can be easily fixed. Furthermore, since a bending mechanism or the like is not required when manufacturing such a laminate, it is possible to suppress an increase in the size and complexity of the equipment. In some cases, there is an advantage that many existing facilities such as a winding device can be used.

Means 15. The means 13 or 13 characterized in that the winding core has a slit, and in the winding step, after guiding the separator to the slit, winding is started from the longitudinal center of the separator. 14
The method for producing a laminate according to the above.

According to the means 15, at the beginning of the winding step, the separator is guided by the slit of the winding core, and then starts to be wound from the center in the longitudinal direction. For this reason, winding can be performed easily and reliably.

Means 16. At the time of the holding step, the supplied plus electrode foil and the minus electrode foil are covered with the separator, so that the separator is pressed by a roller, and the pressing by the roller is released at a predetermined timing. The method for producing a laminate according to any one of means 13 to 15, characterized in that:

According to the means 16, during the holding step,
When the separator is pressed by the respective rollers, the supplied plus electrode foil and minus electrode foil are covered and held by the separator. In addition, since the pressing by the roller is released at a predetermined timing, the roller is less likely to hinder the subsequent steps.

Means 17. 17. The method for manufacturing a laminate according to any one of means 13 to 16, wherein the rotation of the core is stopped at least in the supplying step.

According to the means 17, the rotation of the core is stopped at least in the supplying step. Therefore, the supply of the electrode foil can be performed smoothly and accurately.

Means 18. The laminate according to any one of means 1 to 5, the laminate manufactured by the manufacturing apparatus according to any one of means 6 to 12, or the laminate manufactured by the manufacturing method according to any one of means 13 to 17 Electric double layer capacitor with a laminate.

According to the means (18), the above-mentioned respective functions and effects can be obtained with respect to the electric double layer capacitor provided with the laminated body.

Means 19. The laminate according to the means 5, a casing accommodating the laminate, and a plus and minus electrode terminal provided in the casing, wherein the plus electrode terminal and the current collecting lead on the plus electrode foil side are provided. And the negative electrode terminal and the current collecting lead on the negative electrode foil side are connected.

According to the means 19, since the current collecting leads are easily bundled, when the electric double layer capacitor is manufactured using the laminated body, the electric double layer capacitor can be manufactured easily and reliably, and the productivity is improved. be able to.

[0047]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described below with reference to the drawings.

As shown in FIG. 1, the electrolytic double-layer capacitor 1 according to the present embodiment includes a casing 2 and a laminate 3 housed in the casing 2. The casing 2 includes a box-shaped casing body 4 and a lid 5 that closes an opening thereof. The lid 5 is provided with a positive electrode terminal 6 and a negative electrode terminal 7.

As shown in FIG. 7, the laminate 3 is composed of a plurality of sheet-like positive electrode foils 11, a number of negative electrode foils 12 equal to the number of the positive electrode foils 11, and a number of these negative electrode foils 11, 1.
And a separator 13 wound up so as to hold the two insulated from each other. The separator 13 is made of, for example, an electrically insulating material such as paper, film, and nonwoven fabric. In the present embodiment, the separator 13
It is constituted by a single strip having a predetermined length, and is wound from a central portion in the longitudinal direction. The outer periphery of the laminate 3 is surrounded by the separator 13 without exposing the electrode foils 11 and 12, and an edge portion of the separator 13 is attached to a non-edge portion with a tape 14. . At least when the separator 13 is housed in the casing 2, the separator 13 is impregnated with a predetermined electrolyte solution, so that the function as the electric double-layer capacitor 1 is exhibited.

As shown in FIGS. 8A and 8B, the positive electrode foil 11 and the negative electrode foil 12 are both formed by applying activated carbon to the surface of an aluminum foil. The plus electrode foil 11 and the minus electrode foil 12 have substantially rectangular main bodies 15 and 16 and current collecting leads 17 extending from one side of the main bodies 15 and 16.
18 are provided. The current collecting lead 17 on the positive electrode foil 11 side extends in parallel from the side separated from the current collecting lead 18 on the negative electrode foil 12 side. In this case, the positive electrode foil 11 and the negative electrode foil 12 may be formed by using the same electrode foil and making the front and rear surfaces different from each other (by simply turning the front and back surfaces).

In this embodiment, these positive electrode foils 1
The negative electrode foils 1 and the negative electrode foils 12 are alternately arranged one by one so as to face each other (along the opposed flat surfaces). That is, the positive electrode foil 11 and the negative electrode foil 12 are held so as not to cause a positional shift by being sandwiched between the wound separators 13. In this case, the current collecting leads 17 on the positive electrode foil 11 side are collectively protruded from a predetermined side (for example, the left side in FIG. 1), and the current collecting leads 18 on the negative electrode foil 12 side are collectively protruded from the predetermined side. It is in a state of protruding from the side to be separated (for example, the right side in FIG. 1).

The laminated body 3 having such a configuration is housed in the casing 2 as shown in FIG. And
The current collecting lead 17 on the positive electrode foil 11 side is connected to the positive electrode terminal 6 in a bundled state, and the negative electrode foil 1
The electric double layer capacitor 1 is formed by connecting the current collecting leads 18 on the second side to the minus electrode terminal 7 in a bundled state.

Next, the laminated body 3 having the above-described structure
A manufacturing apparatus for manufacturing the device will be described.

As shown in FIGS. 2 and 3, the manufacturing apparatus is provided with a winding core 21 provided so as to be able to protrude and retract from a device panel (not shown). The core 21 has a rectangular cross section,
A slit 22 for guiding the separator 13 is provided at a central portion thereof. In the present embodiment, the opposing surface corresponding to the long side portion of the core 21 is a flat surface 21a.
It has become.

The winding core 21 can be protruded and retracted from the apparatus panel surface by a winding core actuator 23. That is, when the separator 13 is wound, the winding core 21 is made to protrude from the apparatus panel surface, and when the winding is completed and the attachment with the tape 14 is completed, the winding core 21 is made to be immersed. By the immersion, the above-mentioned laminated body 3 is detached.

Further, the core 21 is rotatable by a servomotor 24. That is, the winding core 21 is provided directly connected to the rotation shaft of the servomotor 24. Of course, the core 21 may be indirectly provided on the rotating shaft of the servomotor 24 via a separate pulley or the like. The servo motor 24 is provided with an encoder 25, and the encoder 25 detects the rotation angle and the like of the core 21 at any time.

Further, the manufacturing apparatus is provided with a separator chuck 26 for pulling the separator 13. The separator chuck 26 is a belt-like separator 1.
3 has a function of gripping the leading edge and pulling it by a predetermined length. The separator chuck 26 includes:
The actuator is operated by a chuck actuator 27.

Further, the manufacturing apparatus is provided with electrode foil supply means for supplying the positive electrode foil 11 and the negative electrode foil 12 to predetermined positions, respectively. 2 and 5 (a)
As shown in the figure, the electrode foil supply means includes a plus electrode foil chuck 28 as a plus electrode foil supply means capable of supplying only the plus electrode foil 11 and a minus electrode foil supply means capable of supplying only the minus electrode foil 12. And a negative electrode foil chuck 29. Chuck 28 for both electrode foils,
29 denotes chuck actuators 31 and 32, respectively.
Is driven and controlled. For example, the actuators 31 and 32 for chucks are operated at a predetermined timing when the core 21 is in a horizontal state, whereby the chucks 31 and 32 are stored (or conveyed) in a portion different from the core 21. The positive electrode foil 11 and the negative electrode foil 12 are gripped by the chucks 28 and 29 and the flat surface 21 a
Is conveyed to a position corresponding to.

2 and FIG. 5 (b).
As shown in (1), there are provided pressing rollers 33 and 34 constituting pressing means capable of pressing the supplied positive electrode foil 11 and negative electrode foil 12 via the separator 13 respectively. These rollers 33,
Numeral 34 is constituted by free rollers, and the movement is controlled by roller actuators 35 and 36, respectively. For example, a plus electrode foil 11 and a minus electrode foil 12
Is supplied to a position corresponding to the flat surface portion of the core 21, the pressing rollers 33, 34 which have been separated from the core 21 until then are moved by the roller actuators 35, 36. . This allows
The rollers 33 and 34 move to a portion corresponding to the flat surface 21 a of the core 21, and are pressed by the pressing rollers 33 and 34 in a state where the positive electrode foil 11 and the negative electrode foil 12 are covered with the separator 13. It has become.

In addition, the manufacturing apparatus includes a sticking means 37 as a fixing means for sticking the edge of the separator 13 to the non-edge with the tape 14 after covering the outermost peripheral side with the separator 13. Have.

The configurations of the core actuator 23, the chuck actuators 27, 31, 32, the roller actuators 35, 36 and the sticking means 37 are not limited at all.
Arbitrary components such as a cam mechanism can be appropriately adopted.

In this embodiment, the actuators 23, 24, 27, 31, 32, 35, 36,
A control device 41 for driving and controlling the 37 is provided. The control device 41 controls the actuators 23, 24, 27, 3 based on initial input data and signals from various detection means including the encoder 25.
1, 32, 35, 36, and 37 are drive-controlled at a predetermined timing and by a predetermined amount at a predetermined speed.

Next, a description will be given of a method of manufacturing the laminate 3 using the manufacturing apparatus having the above-described structure. The manufacture of the laminated body 3 is basically performed based on a control signal from the control device 41 and based on the appropriate control of the actuators 23, 27, 31, 32, 35, 36, and 37. Things.

First, as shown in FIG. 3, by operating the chuck actuator 27, the leading edge of the strip-shaped separator 13 is gripped by the separator chuck 26 and is pulled in by a predetermined length. When the separator 13 is pulled by a predetermined length, the core actuator 23 causes the core 21 to protrude from the apparatus panel surface. Thereby, the separator 13 is guided by the slit 22. At this time, the core 21 is located exactly at the central portion in the longitudinal direction of the separator 13. Of course, in a strict sense, it is not limited to the central part. In addition, instead of the separator chuck 26, a suction device is provided, and in a state where the core 21 is projected in advance,
The separator 13 may be configured to be pulled by a suction device.

Next, the control device 41 operates the servo motor 24 to rotate the winding core 21 by a predetermined amount, and starts winding the separator 13 from the center in the longitudinal direction. For example, as shown in FIGS. 4 (a) to 4 (e), the winding core 21 having the flat surface 21a extending in the vertical
Rotate 70 degrees. As a result, a substantially central portion in the longitudinal direction of the separator 21 is wound around the core 21.

Subsequently, when the winding core 21 is rotated by the predetermined amount, the control device 41 stops the rotation of the servo motor 24 once. At this time, the flat surface 21a of the core 21
Will extend in the horizontal direction, for example. And
From this state, the control device 41 operates the chuck actuators 31, 32. Then, as shown in FIG. 5A, the plus electrode foil 11 is gripped by the plus electrode foil chuck 28 and supplied to a portion corresponding to one flat surface 21a (upper surface in the figure). Also, with this,
The negative electrode foil 12 is gripped by the negative electrode foil chuck 29 and supplied to a portion corresponding to the other flat surface 21a (the lower surface in the drawing).

Next, the control device 41 operates the roller actuators 35, 36. Then, as shown in FIG. 5B, the pressing rollers 33 and 34 which have been separated from the core 21 until then become flat surfaces 21a of the core 21.
Is moved while pressing the separator 13 to a portion corresponding to. That is, in a state where the plus electrode foil 11 and the minus electrode foil 12 are covered with the separator 13, they are pressed by the pressing rollers 33 and 34. At this time, the gripping by the positive electrode foil chuck 28 and the negative electrode foil chuck 29 is released,
The chucks 28 and 29 are returned to their original positions in preparation for the next gripping of the positive electrode foil 11 and the negative electrode foil 12.

Subsequently, the control device 41 controls the servo motor 2
By operating again, the core 21 is rotated by a predetermined amount (for example, 180 degrees) as shown in FIG. 6, and the separator 13 is further wound up. At this time, at an appropriate timing, the pressing by the pressing rollers 33 and 34 is released to return to the original position. The appropriate timing is a point in time when the positive electrode foil 11 and the negative electrode foil 12 are held (sandwiched) by the wound separator 13 even when the pressing is released. That is, thereafter, the supplied plus electrode foil 11 and minus electrode foil 12 do not shift or fall off.

Thereafter, operations such as the supply of the positive electrode foil 11 and the negative electrode foil 12, the pressing by the pressing rollers 33 and 34, and the rotation of the core 21 are repeated. Then, after the above operation is repeated a predetermined number of times,
Finally, only the separator 13 is wound up without supplying the electrode foils 11 and 12, so that the outer periphery is surrounded by the separator 13. Further, the control device 37 operates the sticking means 37 to stick the tape 14 so as to fix the edge of the separator 13. Thereby, as shown in FIG.
The laminate 3 is manufactured. Thereafter, the core actuator 23 is operated, the core 21 is immersed in the apparatus panel surface, and the laminate 3 is taken out of the manufacturing apparatus.

As described above, according to the present embodiment, the plus electrode foil 11 and the minus electrode foil 12 are firmly held by the separator 13 during the production of the laminated body 3 and are less likely to be displaced. For this reason, it is possible to prevent a problem caused by the displacement.

Further, since the separator 13 is to be wound, even when fixing the edge of the separator 13, it is only necessary to wind the separator 13 excessively and finally adhere it with the tape 14. For this reason, the fixing operation can be performed easily and smoothly, and a situation in which the electrode foils 11 and 12 are displaced during fixing does not occur.

Further, in manufacturing the above-mentioned laminated body 3 and, consequently, the electrolytic double-layer capacitor 1, no separate bending mechanism or the like is required, so that the equipment can be prevented from becoming larger and more complicated. In particular, in the present embodiment, many existing facilities such as a winding device can be used.

The present invention is not limited to the above-described embodiment, but may be implemented as follows, for example.

(A) In the above embodiment, the plate-shaped core 21 having a rectangular cross section is employed. On the other hand, the shape of the core 21 is not particularly strictly limited.

For example, as shown in FIG. 9 or FIG. 10, winding cores 51 and 53 having curved surfaces 52 and 54 may be employed. However, from the viewpoint of suppressing the bending and the like of the electrode foils 11 and 12 and the volume density of the electrolytic double layer capacitor, it is desirable to have a flat surface or a substantially flat surface as much as possible.

(B) As shown in FIG.
May be provided at both end portions with tapered guide portions 57 so that the separator is easily guided.

(C) The laminate 3 after being taken out may be compressed.

(D) In some cases, as shown by an arrow α in FIG. 7, a part of the laminated body 3 (parts of the separators 13 on both sides) may be cut off to form a laminated body.

(E) The laminated body is connected to the electric double layer capacitor 1
Besides, it can be used for batteries such as lithium ion batteries or other capacitors such as aluminum electrolytic capacitors.

(F) The number of the electrode foils 11 and 12 is not particularly limited as long as it is two or more.
The number may be more than one.

(G) In fixing the edge portion of the separator 13, an adhesive or the like may be used instead of the tape 14.

(H) Instead of the pressing rollers 33 and 34 in the above embodiment, a separate pressing means (for example, a pressing plate, a pressing rod, etc.) may be provided.

In addition, if the positive electrode foil 11 and the negative electrode foil 12 can be held by the separator 13 without shifting, the pressing rollers 33,
The configuration may be such that the roller 34 and the roller actuators 35 and 36 are omitted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of an electric double layer capacitor according to an embodiment.

FIG. 2 is a block diagram illustrating an electrical configuration of a manufacturing apparatus of the laminate.

FIG. 3 is a schematic front view showing a winding core, a separator chuck, and the like.

FIGS. 4A to 4E are schematic diagrams for sequentially explaining an initial winding step.

5A is a schematic view for explaining a step of supplying an electrode foil, and FIG. 5B is a schematic view for explaining a pressing step by a roller.

FIG. 6 is a schematic view showing a state where the core is further rotated by a predetermined angle from the state of FIG. 5;

FIG. 7 is a schematic cross-sectional view showing the laminate in a state where winding has been completed and affixing with a tape has been completed.

8A is a plan view showing a plus electrode foil, and FIG. 8B is a plan view showing a minus electrode foil.

FIG. 9 is a schematic diagram showing a configuration of a core in another embodiment.

FIG. 10 is a schematic diagram showing a configuration of a core in another embodiment.

FIG. 11 is a schematic diagram showing a configuration of a core in another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electric double layer capacitor, 2 ... Casing, 3 ... Laminated body, 6 ... Positive electrode terminal, 7 ... Negative electrode terminal, 11
... plus electrode foil, 12 ... minus electrode foil, 13 ... separator, 14 ... tape, 17, 18 ... current collecting lead, 21,
51, 53, 55 ... core, 21a ... flat surface, 22 ... slit, 23 ... core actuator, 24 ... servo motor, 26 ... separator chuck, 28 ... plus electrode foil chuck, 29 ... minus electrode foil Chuck, 33,
34: pressing roller; 37: sticking means as fixing means; 41: control device.

Claims (19)

[Claims] 1. A belt-like separator wound by a predetermined amount, and a plurality of plus electrodes arranged one by one so as to be insulated from each other by being sandwiched by the wound separator. A laminate comprising a foil and a plurality of negative electrode foils. 2. A strip-shaped separator wound by a predetermined amount so as to have opposed flat surfaces or substantially flat surfaces, and a portion corresponding to the flat surface or substantially flat surface of the wound separator. A laminate comprising: a plurality of positive electrode foils and a plurality of negative electrode foils, which are alternately disposed one by one so as to be kept in an insulated state by being sandwiched. 3. A plurality of sheet-like positive electrode foils, a plurality of sheet-like negative electrode foils, and a winding from a longitudinal middle portion to hold the plus and minus electrode foils in an insulated state from each other. And a positive electrode foil and a negative electrode foil are alternately arranged without being bent or bent by being sandwiched between the separators one by one. Laminate. 4. The laminate according to claim 1, wherein the outermost periphery is surrounded by a separator, and the edge of the separator is fixed to a non-edge. . 5. The positive electrode foil and the negative electrode foil each have a current collecting lead that can protrude in the width direction of the separator, and the current collecting leads on the positive electrode foil side collectively protrude from a predetermined side. The laminate according to any one of claims 1 to 4, wherein the current collecting leads on the negative electrode foil side collectively protrude from a side separated from the predetermined side. 6. A winding core rotatably provided for winding at least a strip-shaped separator, and a sheet-shaped plus electrode foil and a minus electrode foil at predetermined portions of the winding separator, respectively. Each time the core is rotated by a predetermined amount, an electrode foil supply means capable of supplying one sheet at a time, and a fixing means for fixing the edge of the separator after covering the outermost peripheral side with the separator. Characteristic laminate manufacturing equipment. 7. A winding core rotatably provided to wind at least a strip-shaped separator, and a sheet-shaped plus electrode foil and a minus electrode foil at predetermined portions of the winding separator, respectively. An electrode foil supply means capable of supplying one sheet each time the core is rotated by a predetermined amount, and the supplied plus electrode foil and the supplied negative electrode foil when the core is rotated by the predetermined amount. An apparatus for manufacturing a laminated body, comprising: a holding means for holding the outer periphery of the separator with a separator; and a fixing means for fixing an edge portion of the separator after covering the outermost peripheral side with the separator. 8. A plate-shaped or substantially plate-shaped core having a flat surface or a substantially flat surface facing each other and rotatably provided to wind at least a strip-shaped separator; An electrode foil supply capable of supplying a sheet-like plus electrode foil and a minus electrode foil to predetermined portions corresponding to the flat surface or the substantially flat surface, respectively, one by one each time the core is rotated by 180 degrees. Means for holding the supplied plus electrode foil and the minus electrode foil so as not to be displaced when the winding core is rotated by 180 degrees; and An apparatus for manufacturing a laminated body, comprising: fixing means for fixing an edge. 9. A roller capable of pressing the supplied plus electrode foil through a separator, and a roller capable of pressing the supplied minus electrode foil through a separator. The apparatus for manufacturing a laminate according to claim 7, further comprising a roller. 10. The apparatus according to claim 6, wherein the winding core has a slit capable of guiding the separator. 11. The positive electrode foil and the negative electrode foil each have a current collecting lead that can protrude in the width direction of the separator, and the electrode foil supply means is configured such that the current collecting leads on the positive electrode foil side are united. The positive electrode foil and the negative electrode foil can be supplied so that the current collecting leads on the negative electrode foil side collectively protrude from the side separated from the predetermined side. An apparatus for manufacturing a laminate according to any one of claims 6 to 10. 12. The electrode foil supply means includes a plus electrode foil supply means capable of supplying only a plus electrode foil and a minus electrode foil supply means capable of supplying only a minus electrode foil. Item 12. An apparatus for producing a laminate according to any one of Items 6 to 11. 13. A winding step of winding a band-shaped separator around a rotatably provided core, and a sheet-shaped positive electrode foil and a sheet-shaped negative electrode at predetermined portions of the partially wound separator, respectively. A supplying step of supplying the foils one by one, and rotating the core by a predetermined angle while keeping the supplied positive electrode foil and negative electrode foil from shifting, and using the separator wound by the rotation to rotate the core. Holding a positive electrode foil and a negative electrode foil, by repeating the supply step and the holding step a predetermined number of times, winding up the separator while alternately holding the positive electrode foil and the negative electrode foil After laminating the outermost peripheral side with a separator, the edge of the separator is fixed and removed from the core. The method of production. 14. A winding step of winding a band-shaped separator around a plate-shaped or substantially plate-shaped core having rotatably provided flat surfaces or substantially flat surfaces facing each other; A supply step of supplying a sheet-like positive electrode foil and a negative electrode foil one by one to a portion corresponding to the flat surface or the substantially flat surface of the separator, and the supplied positive electrode foil and the negative electrode foil Holding the positive electrode foil and the negative electrode foil with a separator wound by the rotation of the winding core by 180 degrees or substantially 180 degrees while preventing the displacement. By repeating the step and the holding step a predetermined number of times, the separator is wound up while alternately holding the positive electrode foil and the negative electrode foil, and furthermore, the outermost peripheral side is sealed. After coating with regulator, with allowed to fix the edge portion of the separator, method for producing a laminate, characterized in that removal from the core. 15. The winding core has a slit, and in the winding step, after the separator is guided by the slit, winding is started from a central portion in the longitudinal direction of the separator. The method for producing a laminate according to claim 13 or 14. 16. In the holding step, the separator is pressed by a roller so that the supplied positive electrode foil and the supplied negative electrode foil are covered with the separator, and the pressing by the roller is released at a predetermined timing. The method for producing a laminate according to any one of claims 13 to 15, wherein: 17. At least in the supplying step,
17. The method according to claim 13, wherein the rotation of the core is stopped. 18. A laminate according to any one of claims 1 to 5, a laminate produced by the production apparatus according to any one of claims 6 to 12, or a laminate according to any one of claims 13 to 17. An electric double-layer capacitor comprising a laminate manufactured by the manufacturing method described in the above. 19. A laminate according to claim 5, comprising: a casing accommodating the laminate; and positive and negative electrode terminals provided on the casing, wherein the positive electrode terminal and the positive electrode foil are provided. An electric double layer capacitor, wherein the negative electrode terminal is connected to the negative electrode terminal and the negative electrode terminal.