JP2003163142A - Method for manufacturing electric double layer capacitor cell and its manufacturing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric double layer capacitor cell in which an anode or cathode is automatically inserted between separators, and its manufacturing method. <P>SOLUTION: In the method for manufacturing the electric double layer capacitor cell which has the two-fold separator 4 which individually sandwiches at least one of the anode or the cathode and is formed so that the anode and the cathod are stacked alternatively, a process in which one half 4e of the separator 4 folded in two is sucked and supported in position, a process in which another half 4f of the separator 4 is opened, and a process in which an electrode sheet (anode or cathode) 1 is interposed between the separators 4 are carried out in order. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved method and apparatus for manufacturing an electric double layer capacitor cell.

[0002]

2. Description of the Related Art In recent years, as various power storage devices, attention has been paid to a technique of applying an electric double layer capacitor which can be rapidly charged and has a long charge / discharge cycle life.

An electric double layer capacitor cell is constructed by alternately laminating the same number of positive electrode bodies and negative electrode bodies with a separator interposed therebetween (see Japanese Patent No. 3005992, Japanese Patent Laid-Open No. 7-94374). .

[0004]

SUMMARY OF THE INVENTION The present invention is based on the prior art of such an electric double layer capacitor, and a method of manufacturing an electric double layer capacitor cell in which a positive electrode body or a negative electrode body is automatically sandwiched between separators and The purpose is to provide the manufacturing apparatus.

[0005]

SUMMARY OF THE INVENTION A first aspect of the present invention is an electric battery comprising a two-fold separator that sandwiches at least one of a positive electrode body and a negative electrode body individually, and is formed by alternately stacking positive electrode bodies and negative electrode bodies. In the method of manufacturing a multilayer capacitor cell,
A step of adsorbing and supporting one half of one half of the folded separator at a predetermined position, a step of opening the other half of the separator, and a step of interposing a positive electrode body or a negative electrode body between the separators in order. I decided to do it.

A second aspect of the present invention is provided with a bi-folded separator that individually sandwiches at least one of the positive electrode body and the negative electrode body,
In an electric double-layer capacitor cell manufacturing apparatus configured by alternately stacking positive electrode bodies and negative electrode bodies, a main body plate that adsorbs and supports one half of a separator, and one half of a half-folded separator And a suction plate for suctioning the other half of the separator, and an opening / closing mechanism for moving the suction head to open and close the separator.

According to a third aspect of the invention, in the second aspect of the invention, the suction head is offset with respect to the suction plate toward the front end of rotation.

According to a fourth aspect of the invention, in the second or third aspect of the invention, the suction head is configured to generate a negative pressure by flowing air to adsorb one half of the separator in a non-contact manner.

[0009]

In the first aspect of the invention, by opening the separator folded in two by suction at a predetermined position, the positive electrode body or the negative electrode body can be accurately interposed between the separators. You can increase productivity.

In the second aspect of the invention, it is possible to automate the work of sandwiching the positive electrode body or the negative electrode body between the separators folded in two by the manufacturing apparatus, and by putting the manufacturing line including this manufacturing apparatus in the glove box,
The electric double layer capacitor cell can be manufactured without being exposed to the outside air, and the quality can be stabilized.

In the third aspect of the invention, the suction head is offset with respect to the suction plate toward the front end of rotation so that one half of the suction head is sucked onto the suction plate. It is opened securely from the tip side.

In the fourth aspect of the invention, the suction head generates negative pressure by flowing air to adsorb one half of the separator in a non-contact manner. It becomes smaller than the suction force of one half and it is possible to prevent both half of the suction from being attracted to the suction head.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, an electric double layer capacitor cell has the same number of positive electrode bodies 1a and negative electrode bodies 1b and one of them.
The two-fold separator 4 sandwiching each one is laminated. In the electric double layer capacitor, the laminated body of the electric double layer capacitor cells is housed in an airtight container together with an electrolytic solution.

The positive electrode body 1a and the negative electrode body 1b are the collector electrode 2
The same electrode sheet 1 is provided with polarizable electrodes 3 on both surfaces. The electrode sheet 1 is composed of a collecting electrode 2 and an activated carbon electrode 3 (polarizable electrode) which is polymerized on both surfaces thereof. The collector electrode 2 is made of a rectangular metal foil (for example, aluminum foil), and a strip-shaped lead portion 2a is integrally formed on one side of the rectangular plane so as to be closer to one side.

The separator 4 sandwiching the electrode sheet 1 is
A dough (made of a resin or paper porous film such as Teflon (registered trademark) or polypropylene) is folded into two. The electrode sheet 1 is inserted inside the separator 4 and positioned with reference to the folded line 4a. The half-folded separator 4 is a lead 2 a of the collector electrode 2.
While exposing a part (tip side) of the electrode sheet 1, both sides (polarizable electrode 3) of the electrode sheet 1 are covered and three sides (two sides orthogonal to the bending line 4a and one side parallel to the bending line 4a) are surrounded. ), A margin of a predetermined width (a portion where half surfaces overlap each other) is generated, and the size (developed area) is set.

As shown in FIG. 1, the even number of electrode sheets 1 (the same number of positive electrode bodies and negative electrode bodies) are folded into two separators 4 each.
It is sandwiched between and formed into a predetermined number of laminated bodies (electric double layer capacitor cells). In the electrode sheet 1, the lead portions 2a of the positive electrode body are alternately inverted so that the lead portions 2a of the positive electrode body are arranged on one side of one side of the collector electrode 2 and the lead portion 2a of the negative electrode body in relation to the lead portions 2a which are closer to one side of the collector electrode 2. Part 2a is the opposite side,
It is assembled in a stacked state. In the lead portion 2a of the collecting electrode 2, the same poles are bound together, and inside the container,
Bundling portions (overlapping portions of the lead portions 2a) having polarities respectively corresponding to the pair of terminals are joined.

With this structure, the electrode sheet 1 can be positioned in the bi-folded separator 4 with reference to the folding line 4a. For example, a bi-folded separator 4 that sandwiches the electrode sheet 1 may be formed by bending the bent line 4a.
When stacking or the like is performed in a vertically placed state in which is a horizontal lower side, the bending line 4a of the bi-fold separator 4 regulates the position of the electrode sheet 1. Therefore, in the manufacturing process, thin products (the positive electrode body 1a and the negative electrode body) are 1b and the separator 4 interposed between them are prevented from being displaced.

If a deviation occurs between the positive electrode body 1a and the negative electrode body 1b and the separator 4, the insulation between the positive electrode body 1a and the negative electrode body 1b becomes incomplete, which may cause a short circuit.
In this respect, the double-folded separator 4 can easily prevent the displacement between the positive electrode body 1a and the negative electrode body 1b, and greatly improve the yield of products (electric double layer capacitors). Further, regarding the positive electrode body 1a and the negative electrode body 1b,
Since the same electrode sheet 1 is shared, the effect of significantly reducing the manufacturing cost of these is also obtained.

FIG. 2 illustrates another embodiment (structure of the laminated body), and the bi-folded separator 4 is assembled only to one of the positive electrode body 1a and the negative electrode body 1b.
Every other layered body, the electrode sheet 1 is sandwiched between the half-folded separators 4, and the half-face of each half-folded separator 4 is placed between the activated carbon electrode 3 of each positive electrode body 1a and the activated carbon electrode 3 of each negative electrode body 1b. Intervening (insulating between a pair of activated carbon electrodes)
It becomes a form to do.

In this case, the half-folded separator 4 is halved as compared with the example of FIG. 3 (where the half-folded separator 4 is assembled to all the electrode sheets 1 constituting the laminated body). Regarding the positioning of the folded separator 4, although its function is halved,
The overlapping of the half-faces of the half-folded separator 4 is eliminated, the thickness of the electric double layer capacitor cell can be reduced and the size can be reduced, and the capacitance of the electric double layer capacitor cell can be increased.

FIG. 3 is a view for explaining a manufacturing process (a part) of the electric double layer capacitor. (A) to (c) are processes for manufacturing the electrode sheet 1, and (d) to (f) are folded in two. Of manufacturing the separator 4 of FIG.
Represents a step of sandwiching (assembling) with the separator 4 folded in half.

In (a), 10 is a sheet processed into the electrode sheet 1, which is wound around a roll and conveyed. The sheet 10 is coated with paste-like activated carbon (a mixture containing a binder) as a constituent material of the polarizable electrode 3 on both sides of a metal foil (a constituent material of the collector electrode 2) or is formed into a plate-like activated carbon ( It is manufactured by laminating a mixture containing a binder). In (b), the sheet 10 is stretched from a roll, and the sheet 11 having a predetermined size (size) is obtained.
Be cut by. In (c), the sheet 11 having a predetermined size is die-cut by a press to be formed into the electrode sheet 1 having a predetermined shape (the lead portion 2a of the collecting electrode 2 is provided on one side of a rectangular plane). In addition, in (b) and (c), 12 is an exposed part which becomes a formation region of the lead part 2a of the collecting electrode 2 on one side (both sides) of the metal foil, and is set on the sheet 10 in (a). .

In (d), the cloth of the separator 4 (made of a resin or paper porous film such as Teflon (registered trademark) or polypropylene) is cut into a predetermined size. In (e), the cloth 13 having a predetermined size is
A predetermined folding line 4a (dividing the length of the cloth 4 into two equal parts) is formed on the half-folded separator 4.

In (f), the half-folded separator 4
The folding portion 4c is provided with a bending line 4b that is orthogonal to the bending line 4a. The folded portions 4c are formed on two sides of the separator 4 (the cloth 13 having a predetermined size) that is folded in two and intersects one side formed by the folding line 4a.

In (g), the separator 4 (f) is assembled to the electrode sheet 1 (c). Electrode sheet 1
Is inserted into the separator 4 from one side that is open (without bending).

Through these steps, the positive electrode body 1a and the negative electrode body 1b are easily and efficiently formed on the electrode sheet 1 having a predetermined shape by stamping the sheet 10. Since the folded-back portion 4c is added to the double-folded separator 4, the folded-back line 4a and the folded-back portion 4 of the double-folding are added.
The electrode sheet 1 can be positioned vertically and horizontally in two directions based on the folding line 4b of c, and deviations between the thin materials (the positive electrode body and the negative electrode body and the separator 4 positioned between them) can be prevented appropriately. .

FIG. 4 is an explanatory view showing a manufacturing process in which the electrode sheet 1 is interposed between the bi-folded separators 4,
Steps (a), (b), and (c) are sequentially performed.

In step (a), a step of sucking and supporting one half portion 4e of the half-folded separator 4 at a predetermined position is performed.

In (b), the step of opening the other half half 4f of the separator 4 and the step of interposing the electrode sheet 1 between the half half 4e and the half half 4f of the separator 4 are sequentially performed. .

In (c), the step of closing the opened half half 4f is performed.

Next, FIGS. 5 to 8 show a manufacturing apparatus for automatically interposing the electrode sheet 1 between the half-folded separators 4. This manufacturing apparatus moves a suction plate 27 that sucks and supports one half half 4e of a folded separator at a predetermined position, a suction head 35 that sucks the other half half 4f of the separator, and a suction head 35. And an opening / closing mechanism 30 for opening / closing the separator 4.

The suction plate 27 is provided on the main body 21, and the main body 21 is fixed to the slider 24 on the frame 22 via the columns 23. The slider 24 is moved in the horizontal direction along the guide rail 25 by the electric actuator 26, and stops the main body 21 at three positions of the separator loading step position, the electrode sheet loading step position, and the unloading position.

The opening / closing mechanism 30 includes a clamper 31 provided with a suction head 35, a pair of arms 32 protruding from the base end of the clamper 31, and a shaft 33 for rotatably supporting the middle of each arm 32 on the main body 21. And an air cylinder 34 that rotationally drives the arm 32. Opening / closing mechanism 3
In the case of 0, the clamper 31 is stopped at two positions, that is, an open position which is substantially vertical and is shown by a solid line in FIG. 5, and a substantially horizontally extending closed position which is shown by a two-dot chain line in FIG.

A suction plate 27 provided on the main body 21
Is formed of a porous material, and a negative pressure from a suction pump is introduced through a pipe (not shown) to bring the half-parts 4e of the separator 4 into contact with each other for adsorption and support.

Suction head 3 provided on the clamper 31
Reference numeral 5 is a negative pressure generated by flowing air from the discharge pump through a pipe (not shown), and the half half 4 of the separator 4 is
f is adsorbed and held in a non-contact manner.

As a result, the suction force of the one-half portion 4f by the suction head 35 becomes smaller than the suction force of the one-half portion 4e by the suction plate 27, and the suction head 35 has the one-half portion 4f.
It is possible to prevent both and the one half portion 4e from being adsorbed.

As shown in FIG. 6, the suction plate 27 is provided closer to the rotation base end of the clamper 31 than the central portion of the main body 21, while the suction head 35 is closer to the rotation tip end of the clamper 31 than the central portion of the main body 21. It is provided in. That is, the suction head 35 is offset toward the rotation tip end with respect to the suction plate 27, and the suction plate 27 suction-supports the base end side of the half half portion 4e of the separator 4, while the suction head 35 is half the separator 4. By holding the tip side of the portion 4f, the half half portion 4f of the separator 4 is surely opened from the tip side with respect to the half half portion 4e as the clamper 31 rotates.

A photoelectric switch 41 for detecting the opening / closing operation of the clamper 31 is attached to the clamper 31, and a photoelectric sensor 42 for detecting the seating of the separator 4 is attached to the main body 21.
Is attached. These detection signals are sent to a controller (not shown) via a code arranged in the chain 43.

The manufacturing apparatus is constructed as described above, and its operation will be described below.

With the clamper 31 open, the separator 4 is placed at a predetermined position across the main body 21 and the clamper 31 by a robot hand (not shown), and the half plate 4e of the separator 4 is sucked and supported by the suction plate 27. Be seen.

At this time, one end (folding line 4a) of the separator 4 is brought into contact with the step portion 28 of the main body 21 to perform the positioning.

The clamper 31 is rotated in the closing direction, the suction head 35 sucks and holds the one half 4f of the separator 4 in a non-contact manner, and the clamper 31 is rotated in the opening direction to open the separator 4. Be seen.

With the separator 4 opened in this manner, the electrode sheet 1 is placed at a predetermined position on the one-half portion 4e by a robot hand (not shown), and the electrode sheet is placed between the one-half portion 4e and the one-half portion 4f of the separator 4. The step of interposing the seat 1 is performed.

At this time, one end of the electrode sheet 1 is brought into contact with the one half portion 4f of the separator 4 to position the electrode sheet 1.

The step of rotating the clamper 31 in the closing direction to close the opened half half 4f of the separator 4 is performed.

Thus, the electrode sheet 1 is provided between the separators 4.
After being automatically interposed, the negative pressure guided to the suction head 35 is released, and the clamper 31 is rotated in the opening direction to release the negative pressure guided to the suction plate 27 and to be placed on the main body 21. The separator 4 and the electrode sheet 1 are conveyed via a robot hand.

The suction plate 27 constructed as described above
Holds one half half 4e of the separator 4 folded in two at a predetermined position, and the suction head 35 holds the other half half 4e.
By adsorbing and opening f, and inserting the electrode sheet 1 between the separators 4, the electrode sheet 1 is interposed between the separators 4.
It is possible to sufficiently secure the accuracy of interposing, and to improve the productivity.

Further, by putting the manufacturing line including this manufacturing apparatus in the glove box, it becomes possible to manufacture the electric double layer capacitor cell without exposing it to the outside air, and the quality is stabilized.

It is obvious that the present invention is not limited to the above-mentioned embodiments and various modifications can be made within the scope of the technical idea thereof.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electric double layer capacitor cell showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an electric double layer capacitor cell showing another embodiment.

FIG. 3 is an explanatory view showing a manufacturing process of an electric double layer capacitor cell.

FIG. 4 is an explanatory view showing a manufacturing process of interposing an electrode sheet on a separator.

FIG. 5 is a side view showing the manufacturing apparatus.

FIG. 6 is a plan view of the manufacturing apparatus.

FIG. 7 is a front view of the same manufacturing apparatus.

FIG. 8 is a front view of the same manufacturing apparatus.

[Explanation of symbols]

1 electrode sheet 1a Positive electrode body 1b Negative electrode body 2 collector electrodes 2a Lead part 3 Activated carbon electrode (polarizable electrode) 4 separator 4f, 4e One half 21 body 27 Adsorption plate 30 open / close mechanism 31 Clamper 34 Air cylinder 35 suction head

Claims (4)

[Claims] 1. A method of manufacturing an electric double layer capacitor cell, comprising a bi-folded separator that sandwiches at least one of a positive electrode body and a negative electrode body individually, and a method of manufacturing an electric double layer capacitor cell configured by alternately stacking a positive electrode body and a negative electrode body. Performing a step of adsorbing and supporting one half of the separated separator at a predetermined position, a step of opening the other half of the separator, and a step of interposing a positive electrode body or a negative electrode body between the separators in order. And a method for manufacturing an electric double layer capacitor cell. 2. An electric double layer capacitor cell manufacturing apparatus comprising a two-fold separator which sandwiches at least one of a positive electrode body and a negative electrode body individually, and which is formed by alternately stacking the positive electrode body and the negative electrode body. An adsorption plate that adsorbs and supports one half of the separated separator at a predetermined position, a suction head that adsorbs the other half of the separator, and an opening / closing mechanism that opens and closes the separator by moving the suction head. An apparatus for manufacturing an electric double layer capacitor cell characterized by the above. 3. The apparatus for manufacturing an electric double layer capacitor cell according to claim 2, wherein the suction head is offset with respect to the suction plate toward a rotation front end. 4. The electric double layer capacitor cell according to claim 2, wherein the suction head generates a negative pressure by flowing air to adsorb one half of the separator in a non-contact manner. Manufacturing equipment.