JP2007281194A - Manufacturing method of capacitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a capacitor capable of being miniaturized and made lightweight in a manufacturing method of a capacitor where an electrode foil is laminated while winding a separator. <P>SOLUTION: A band-shaped separator 2 is yielded by properly disposing a plurality of rectangular anode foils 5 and cathode foils 6 on the surface thereof. By folding the separator and winding it in a flat plate shape, the anode foil 5 and the cathode foil 6 are laminated on the flat-plate shaped surface of the separator 2, and a folded portion of the separator 2 is removed where no anode foil 5 and no cathode foil 6 are disposed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a capacitor in which a plurality of rectangular anode foils and cathode foils are laminated via a separator.

  Conventionally, as a capacitor, there are an electrolytic capacitor, an electric double layer capacitor, and the like, and a plurality of rectangular anode foils are attached to one surface side of a strip-shaped separator at a predetermined interval, for example, with an adhesive or the like. Similarly, there is a method of manufacturing a capacitor element in which a plurality of rectangular cathode foils are similarly attached to one side of a separator at predetermined intervals, and both separators are overlapped and wound into a flat plate shape (see, for example, Patent Document 1).

  Since this winding type capacitor is bent and wound at the separator portion where no electrode foil is present, the electrode foil is not subjected to a load during winding, and cracks, in particular, the dielectric oxide film of the anode foil are damaged. Can be avoided. Further, since the electrode foil can be laminated while winding the separator, there is an advantage that the production speed of the capacitor element can be improved when mass-producing the capacitor element.

Japanese Examined Patent Publication No. 2-52850 (left column of page 3, FIG. 2)

  However, in the method of manufacturing a capacitor element described in Patent Document 1, after winding the separator on which the electrode foil is disposed, the portion where the electrode foil does not exist is selected as the bent portion, and the molding pressure is set. In addition, the capacitor element is formed in a flat shape, but even after the capacitor element is formed in a flat shape, a separator portion where no electrode foil is present remains, and the useless separator exists. However, there is a problem that the volume and weight of the capacitor element are increased.

  The present invention has been made paying attention to such problems, and in a capacitor manufacturing method in which electrode foils are stacked while winding a separator, a capacitor manufacturing method capable of reducing the size and weight of a capacitor is provided. The purpose is to provide.

In order to solve the above-described problem, a method for manufacturing a capacitor according to claim 1 of the present invention includes:
The anode foil and the cathode foil are laminated on the flat surface of the separator by bending a belt-like separator having a plurality of rectangular anode foils and cathode foils appropriately arranged on the surface and winding the separator into a flat plate shape. It is characterized in that the bent portion of the separator where the foil and the cathode foil are not disposed is removed.
According to this feature, it is possible to remove the useless separator portion where the anode foil and the cathode foil are not interposed. Therefore, the capacitor can be reduced in size and weight by the volume and weight of the removed separator.

A capacitor manufacturing method according to claim 2 of the present invention is the capacitor manufacturing method according to claim 1,
The anode foil and the cathode foil are arranged and wound on a flat plate-like surface of a separator having a winding dimension larger than the width dimension of the foil.
According to this feature, since the anode foil and the cathode foil are arranged on the flat plate-like surface of the separator having a large winding dimension, the anode foil and the cathode can be arranged even when the arrangement positions of the anode foil and the cathode foil are slightly shifted. The foil can be laminated via a separator.

The method for manufacturing a capacitor according to claim 3 of the present invention is the method for manufacturing a capacitor according to claim 2,
The separator is wound using a winding axis having a winding dimension larger than the width dimension of the anode foil and the cathode foil.
According to this feature, since the anode foil and the cathode foil are arranged on the separator attached to the winding shaft having a large winding dimension, when the anode foil and the cathode foil are wound together with the separator, the anode foil and the cathode foil It is possible to prevent the end of the sag.

A method for manufacturing a capacitor according to claim 4 of the present invention is the method for manufacturing a capacitor according to any one of claims 1 to 3,
The anode foil and the cathode foil are appropriately disposed on the same surface of the separator, and the anode foil and the cathode foil are laminated via the separator by winding the separator.
According to this feature, the anode foil and the cathode foil need only be arranged on the same surface of the strip-shaped separator, so that the arrangement accuracy of the electrode foil on the separator can be improved, the positional deviation is suppressed, and the manufacturing process is simple. In this case, the capacitor can be manufactured with at least one separator, so that the capacitor after winding can be made thin.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out a method for manufacturing a capacitor according to the present invention will be described below based on examples.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a perspective view showing an entire image of a winding device in the embodiment, and FIG. 2 is a plan view showing an electrode foil and a separator. 3 is a conceptual diagram showing the manufacturing process of the capacitor element, FIGS. 4 to 6 are conceptual diagrams showing the manufacturing process of the capacitor element, and FIG. 7 is a perspective view showing the capacitor element.

  Reference numeral 1 in FIG. 1 is a winding device for carrying out the method for manufacturing a capacitor of the present invention. A strip-shaped separator 2 is wound around and attached to the winding device 1 in a roll shape.

  As shown in FIG. 1, the winding device 1 is provided with a winding shaft plate 7 for winding the separator 2 together with the electrode foils 5 and 6. The winding plate 7 has a substantially flat plate shape, and one end thereof is fixed to the drive unit 8. The winding plate 7 is rotated in the vertical direction by the drive unit 8 so that the upper and lower surfaces of the winding plate 7 can be reversed 180 °. The winding plate 7 is continuously rotated clockwise (in the direction of the arrow in FIG. 1), and the separator 2 can be wound up.

  A presser plate 10 is disposed in the vicinity of the winding shaft plate 7, and the presser plate 10 overlaps the lower surface or the upper surface of the winding shaft plate 7. One end of the presser plate 10 is fixed to the drive unit 9, and the presser plate 10 can be rotated in the vertical direction simultaneously with the rotation of the winding plate 7 in the vertical direction. The presser plate 10 can slide in the horizontal direction and the vertical direction.

  The separator 2 shown in FIG. 1 extends to the winding plate 7 while being guided by a plurality of rollers 11. A cutting device 12 that can cut the separator 2 is provided in the vicinity of the winding plate 7.

  Further, as shown in FIG. 1, a slide plate 13 that is slid in the horizontal direction is disposed in the vicinity of the winding plate 7, and a plurality of anode foils 5 and cathode foils are disposed on the upper surface of the slide plate 13. 6 is placed. Above the slide plate 13, an arm 14 that can move the electrode foils 5, 6 to the upper surface of the winding plate 7 is disposed. The arm 14 can slide in the vertical direction and the horizontal direction, and a suction pad 15 is provided at the lower end of the arm 14.

  As shown in FIG. 1, the suction pads 15 at the lower end of the arm 14 are brought into contact with the electrode foils 5 and 6 to reduce the air pressure in the suction pads, whereby the electrode foils 5 and 6 can be held one by one. ing. As shown in FIG. 2, when the electrode foils 5 and 6 are moved to the upper surface of the winding plate 7 by the arm 14 and the air pressure in the suction pad 15 is increased, the electrode foils 5 and 6 are removed from the suction pad 15. It is separated and placed on the separator 2.

  As shown in FIG. 2, when the electrode foil 6 is placed on the surface of the separator 2 on the upper surface of the winding plate 7, the winding plate 7 is inverted by 180 ° by the drive unit 8, and the next electrode foil 5 is It is placed on the separator 2. By repeating this operation, the separator 2 is wound in a flat plate shape while winding the electrode foils 5 and 6.

  Further, the lateral width dimension α (winding dimension) of the winding shaft plate 7 and the holding plate 10 is formed to be larger than the lateral width dimension β of the anode foil 5 and the cathode foil 6. The foil 6 is disposed so as to be laminated at the center position in the width direction of the winding shaft plate 7 and the presser plate 10. In this embodiment, the lateral width dimension α of the winding shaft plate 7 and the presser plate 10 is about 1.2 to 2.0 times the lateral width dimension β of the anode foil 5 and the cathode foil 6.

  As shown in FIG. 4 (e), the separator 2 that is attached to the winding shaft 7 and wound is formed with a flat surface (flat surface). The direction length dimension γ (the winding dimension of the separator 2) is formed to be larger than the lateral width dimension β of the anode foil 5 and the cathode foil 6.

  As shown in FIG. 2, two anode foils 5 and two cathode foils 6 are alternately placed on the separator 2. The electrode foils 5 and 6 placed on the separator 2 have an anode foil 5 with an aluminum tab 16 attached on the right side, an anode foil 5 with an aluminum tab 16 attached on the left side, and an aluminum tab 17 on the right side in plan view. Four types of electrode foils 5 and 6 are used, which are a cathode foil 6 extended and a cathode foil 6 with an aluminum tab 17 extended on the left side.

  These four types of electrode foils 5 and 6 are arranged so that the electrode foils with the same polarity are symmetrical with respect to the folding position of the separator. That is, the anode foil 5 is arranged so that the adjacent anode foil 5 and the aluminum tab 16 are close to each other, the cathode foil 6 is arranged so that the adjacent cathode foil 6 and the aluminum tab 17 are separated, and the separator 2 is wound. In this case, the aluminum tabs 16 and 17 are overlapped with each other. The separator 2 may be disposed so that the aluminum tabs 17 of the cathode foil 6 are close to each other and the aluminum tabs 16 of the anode foil 5 are spaced from each other.

  Further, as shown in FIG. 2, on the separator 2, one cathode foil 6, two anode foils 5, two cathode foils 6, and thereafter two anodes in order from the first winding. The foil 5 and the two cathode foils 6 are alternately arranged, and the electrode foils 5 and 6 are sequentially arranged on the separator 2 so as to end with the two cathode foils 6 at the end. In this way, it is possible to wind with the minimum number of cathode foils 6 that effectively function as the capacitor element 20 with respect to the number of anode foils 5, so that the capacitor element 20 after winding can be made thinner. can do.

  In order to reduce the electrical characteristics (ESR) of the capacitor, it is desirable that the two cathode foils 6 be arranged so as to face both surfaces of the single anode foil 5. When winding the anode foil 6 so as to oppose both sides of the anode foil 5, in addition to the above-described arrangement method, for example, if one anode foil 5 is first arranged, then 2 One cathode foil, and thereafter two anode foils 5 and two cathode foils 6 may be arranged alternately on the separator 2 so as to end with the two cathode foils 6 at the end. By appropriately selecting the electrode foils 5 and 6 to be wound first, a thin capacitor having excellent electrical characteristics and high storage efficiency can be obtained.

  Anode foil 5 and cathode foil 6 shown in FIG. 2 are each formed of aluminum. The aluminum tab 17 of the cathode foil 6 of the present embodiment is integrally formed extending from the cathode foil 6, but an aluminum tab may be attached separately.

  The manufacturing process will be described in detail with reference to the conceptual diagram of the capacitor element 20 shown in FIGS. First, as shown in FIG. 3 (a), the separator 2 is brought into contact with the lower surface of the reel plate 7, and the presser plate 10 is brought into contact with the lower surface of the reel plate 7 from below, so that the separator 2 and the presser plate 10 are brought into contact with each other. It is clamped by the winding plate 7. At this time, the front end 2 a of the separator 2 protrudes from the winding plate 7 and the presser plate 10 by a predetermined length.

  Next, as shown in FIG. 3 (b), the drive units 8 and 9 are driven, the winding plate 7 is rotated in the vertical direction, and the upper surface of the winding plate 7 is inclined at a predetermined angle. A valley having a substantially V shape in a side view is formed by the upper surface of the plate 7 and the separator 2. Then, the first cathode foil 6 is moved from the slide plate 13 by the arm 14 to the upper surface of the separator 2 near the winding plate 7, that is, the V-shaped valley. Since the separator 2 is sandwiched between the presser plate 10 and the winding plate 7 until the separator 2 is wound around the winding plate 7, slippage of the separator 2 at the beginning of winding can be suppressed.

  A positioning device 45 as a pressing means in this embodiment is disposed in the vicinity of the winding plate 7. In this positioning device 45, the roller 46 is urged in a direction approaching the winding plate 7 by an urging means 47 such as a spring, and the roller 46 abuts on the outer surface side of the separator 2 forming a V-shaped valley. The separator 2 is pressed between the winding shaft 7 and the positioning device 45 so that the positioning device 45 narrows the lower portion of the V-shaped valley. By narrowing the lower part of the V-shaped valley in this way, it is possible to prevent the separator 2 from being loosened and the placement position of the cathode foil 6 from being shifted, and the cathode foil 6 can be placed on the separator 2 accurately.

  Moreover, even if the left-right width dimension α of the winding plate 7 is formed larger than the left-right width dimension β of the electrode foils 5, 6, the lower part of the V-shaped valley is narrowed by the positioning device 45, thereby , 6 can be accurately arranged at the center position of the winding plate 7.

  Furthermore, in this embodiment, a positioning device 45 is used in which the roller 46 is urged by the urging means 47. However, in addition to the roller 46, a plate member that is in contact with the outer surface side of the separator 2 is used. The positioning device 45 may be configured to be biased by the biasing means 47.

  As shown in FIG. 3 (c), the winding plate 7 and the holding plate 10 are rotated 180 ° from the initial winding position (half rotation) with the first cathode foil 6 disposed on the upper surface of the separator 2. ), The first cathode foil 6 is sandwiched between the winding plate 7 and the separator 2. Further, as shown in FIG. 3 (d), the winding plate 7 and the holding plate 10 are rotated to form a V-shaped valley, and the first anode foil 5 is formed on the separator 2 in the vicinity of the winding plate 7. It is placed on the upper surface (V-shaped valley).

  Further, as shown in FIG. 4 (e), when the winding plate 7 and the holding plate 10 are rotated 360 ° (one turn) from the initial winding position, the first anode foil 5 is connected to the winding plate 7. It is sandwiched between the separator 2. Then, the presser plate 10 is slid in the horizontal direction and extracted. In this way, the presser plate 10 can suppress slipping at the beginning of winding of the separator 2 at least until the separator 2 is wound around the reel plate 7. After the separator 2 is wound around the reel plate 7, the presser plate 10 is By removing, the thickness of the capacitor element after winding can be reduced. Here, since the anode foil 5 is covered with the tip portion 2a of the separator, it does not come into contact with the cathode foil 6 and short-circuit.

  As shown in FIG. 4F, a V-shaped valley is formed between the outer surface side of the separator 2 wound by rotating the winding shaft 7 and the inner surface side of the separator 2 before winding. The anode foil 5 is placed on the upper surface (V-shaped valley) of the separator 2 in the vicinity of the winding plate 7. Thereafter, as shown in FIG. 4G, the anode foil 5 and the cathode foil 6 disposed on the upper surface (V-shaped valley) of the separator 2 are sandwiched between the separators 2 each time the winding plate 7 is repeatedly rotated. And stacked. By repeating such an operation, the anode foil 5 and the cathode foil 6 are laminated in the wound separator 2, and the anode foil 5 and the cathode foil 6 are on the same surface inside the separator 2. Will be placed in.

  When the separator 2 is wound around the winding shaft plate 7, the thickness (size) of the wound separator 2 increases, and the anode foil 5 and the cathode foil 6 may not be accurately stacked. However, the outer surface side of the separator 2 before winding forming the V-shaped valley is pressed by the positioning device 45 so as to narrow the lower portion of the V-shaped valley so that a predetermined position on the separator 2 (coil plate) 7 at the center position in the width direction), and the anode foil 5 and the cathode foil 6 can be arranged to prevent the anode foil 5 and the cathode foil 6 from being displaced.

  By repeating such an operation, the anode foil 5 and the cathode foil 6 are laminated in the wound separator 2. Thus, the anode foil 5 or the cathode foil 6 is arranged at the center of the winding axis via the separator 2, the winding axis is rotated, and then the anode foil 5 or the cathode foil 6 is sequentially arranged at the center of the winding axis. Preferably, the aluminum tabs 16 and 17 of the anode foil 5 and the cathode foil 6 that are wound and laminated can be easily aligned.

  In addition, compared with the case where the anode foil 5 and the cathode foil 6 are sequentially arranged and wound in advance on the separator 2, the arrangement distance of the electrode foils 5 and 6 varies depending on the number of windings. This saves you the trouble of having to place the.

  When the winding by the winding plate 7 is finished, the separator 2 is cut by the cutting device 12 so that the separator 2 is arranged on the outermost periphery as shown in FIG. Then, as shown in FIG. 5 (i), the winding plate 7 is removed from the separator 2 wound in a flat plate shape, and the folding portion of the separator 2 where the anode foil 5 and the cathode foil 6 are not arranged is cut into a cutting device. 26, the separator 2 is cut and removed after winding.

  The cutting device 26 is composed of two cutting blades 26a and 26a, and a bending portion formed on the side portion of the wound separator 2 can be simultaneously cut by the two cutting blades 26a and 26a. Further, the separation distance δ between the cutting blades 26a, 26a is substantially the same as the lateral width β of the anode foil 5 and the cathode foil 6, and the center position of the wound separator 2 and the center position of the cutting device 26 are the same. When the cutting operation is performed together, the separator 2 near the edges of the anode foil 5 and the cathode foil 6 can be cut.

  The cutting device 26 of this embodiment uses two cutting blades 26a and 26a to simultaneously cut the bent portions of the right and left separators 2 in FIG. 5 (i). You may make it cut | disconnect the bending site | part of the separator 2 on the right side and the left side separately using the cutting device which has one cutting blade.

  Next, as shown in FIG. 5 (j), a tape 21 is wound around the laminated anode foil 5, cathode foil 6 and separator 2 to form a unit 22. As shown in FIG. 6 (k), both surfaces finished in a flat plate shape are pressed from above and below to be press-shaped. Thus, the thickness of the unit 22 can be further reduced by removing the winding shaft plate 7 and press-shaping both sides finished in a flat plate shape.

  3 to 6, the numbers of the anode foil 5 and the cathode foil 6 are simplified, but in this embodiment, 12 anode foils 5 and 13 are provided in one unit 22. A sheet of cathode foil 6 is used. The number of cathode foils 6 used in one unit 22 is one more than the number of anode foils 5.

  Although the capacitor element 20 described above can be used in one unit, as shown in FIG. 6 (l), one large-capacity type is obtained by stacking three units 22 into one unit. The electrolytic capacitor element 20 is manufactured. Note that the capacitance of the capacitor element 20 can be adjusted by selecting the number of stacked units 22.

  In the one-unit capacitor element 20 in which a plurality of units 22 are stacked, as shown in FIG. 6 (l), each unit 22 has a form in which the cathode foils 6 face each other, and one of the facing cathodes The thickness of the capacitor element 20 can be reduced by removing the foil 6 in advance to create the capacitor element 20, for example, by removing the two cathodes arranged on the outermost periphery of the central unit.

  As shown in FIG. 7, aluminum tabs 17 and 16 extend from the separator 2 of the manufactured capacitor element 20 to the outside. In addition, the aluminum tab 16 of the anode foil 5 and the aluminum tab 17 of the cathode foil 6 are respectively bundled. External leads 23 are attached to the aluminum tabs 17 and 16 by cold welding, ultrasonic welding, laser welding or the like. Thereafter, the capacitor element 20 is impregnated with the electrolytic solution, and the electrolytic solution is held inside the separator 2. Then, the multilayer electrolytic capacitor 25 is formed by covering the capacitor element 20 with a laminate film 24 and heat-sealing it to seal the inside.

  In the above-described embodiment, as shown in FIG. 3A, the presser plate 10 is brought into contact with the lower surface of the winding shaft plate 7 from the lower side at the beginning of winding, but other winding methods at the beginning of winding will be described. To do. FIG. 8 is a conceptual diagram showing a modification of the manufacturing process of the capacitor element 20. First, as shown in FIG. 8 (a), the separator 2 is brought into contact with the lower surface of the winding plate 7, and the leading end 2 a of the separator 2 is bent so as to come into contact with the upper surface of the winding plate 7. The presser plate 10 is brought into contact with the upper surface of the separator 2 from above, and the leading end 2 a of the separator 2 is held between the presser plate 10 and the winding plate 7. Next, as shown in FIG. 8B, the winding plate 7 is rotated in the vertical direction and the upper surface of the winding plate 7 is inclined at a predetermined angle, so that the winding plate 7 and the upper surface of the separator 2 are viewed from the side. A valley having a substantially V shape is formed.

  Then, the first cathode foil 6 is moved to the upper surface of the separator 2 in the vicinity of the winding plate 7, that is, the V-shaped valley, and as shown in FIG. When the plate 10 is rotated 180 ° (half rotation) from the initial winding position, the first cathode foil 6 is sandwiched between the winding shaft plate 7 and the separator 2. At this time, when the presser plate 10 is slid in the horizontal direction and pulled out, the tip portion 2 a is sandwiched between the winding plate 7 and the separator 2 on the lower surface side of the winding plate 7. Thereafter, as shown in FIG. 8 (d), every time the winding plate 7 is rotated halfway, the anode foil 5 and the cathode foil 6 disposed on the separator 2 are wound and laminated together with the separator 2.

  As described above, according to the method for manufacturing the capacitor 25 of the present embodiment, the bent portion of the separator 2 on which the anode foil 5 and the cathode foil 6 are not disposed is cut and removed after the separator 2 is wound. In addition, since the useless side portion of the separator 2 where the cathode foil 6 is not interposed can be removed, the capacitor 25 can be reduced in size and weight by the volume and weight of the removed separator 2. Further, as the number of laminated electrode foils 5 and 6 increases, the side of the capacitor element 20 where the electrode foils 5 and 6 are not interposed becomes thicker, and even if the lateral width dimension of the capacitor element 20 is increased, the side of the separator 2 is increased. The part can be removed.

  Further, the anode foil 5 and the cathode foil 6 are arranged and wound on the flat surface of the separator 2 having a winding dimension γ larger than the width dimension β of the electrode foils 5 and 6, so that the anode foil 5 and the cathode foil 6 are wound. Even when the arrangement position of the foil 6 is slightly shifted, the anode foil 5 and the cathode foil 6 can be laminated via the separator 2.

  In addition, by providing the positioning device 45, the anode foil 5 and the cathode foil 6 can be disposed at the center of the flat plate-like surface of the separator 2 having a large winding dimension γ. Further, as shown in FIGS. 4 (e) and 5 (h), the length dimension γ in the left-right direction of the flat plate-like surface of the separator 2 is larger than the dimension γ ′ at the beginning of winding, and the dimension γ ′ after winding. However, even when the horizontal lengths γ and γ ′ of the flat plate-like surface of the separator 2 change in the middle of winding as described above, the positioning positions of the electrode foils 5 and 6 are appropriately determined by the positioning device 45. Since it is adjusted, the electrode foils 5 and 6 are accurately laminated.

  Further, by winding the separator 2 using a flat plate shaft 7 having a lateral width dimension α (winding dimension) larger than the lateral width dimension β of the anode foil 5 and the cathode foil 6, the lateral width dimension is obtained. Since the anode foil 5 and the cathode foil 6 are arranged on the separator 2 attached to the winding plate 7 having a large α, when the anode foil 5 and the cathode foil 6 are wound together with the separator 2, the anode foil 5 and the cathode It is possible to prevent the end of the foil 6 from curling.

  In addition, the anode foil 5 and the cathode foil 6 are appropriately disposed on the same surface of the strip-shaped separator 2, and the anode foil 5 and the cathode foil 6 are alternately arranged via the separator 2 by winding the separator 2. As a result, the anode foil 5 and the cathode foil 6 need only be arranged on the same surface of the separator 2, so that the arrangement accuracy of the electrode foils 5 and 6 on the separator 2 can be improved, and the positional deviation is increased. In addition to being suppressed, the manufacturing process is simple and labor-saving, and since it can be manufactured with at least one separator 2, the capacitor 25 after winding can be made thin.

  When the number of anode foils 5 arranged in the separator 2 is an even number, the cathode foil 6, the two anode foils 5, and the two cathode foils 6 are sequentially arranged from the first winding. When the number of anode foils 5 arranged alternately on the separator 2 is wound and the number of anode foils 5 arranged on the separator 2 is an odd number, the anode foil 5 and the following two cathode foils are sequentially arranged from the first winding. 6. Two anode foils 5 are alternately placed on the separator 2 and wound, so that the minimum number of cathode foils 6 functioning effectively as a capacitor 25 with respect to the number of anode foils 5 is wound. Therefore, the capacitor 25 after winding can be made thinner.

  The separator 2 is efficiently cut by simultaneously cutting the folded portion of the separator 2 using the two cutting blades 26a, 26a that are spaced apart at substantially the same distance as the lateral width dimension β of the anode foil 5 and the cathode foil 6. Since the work can be performed, and the distance δ between the two cutting blades 26a and 26a is substantially the same as the lateral width β of the anode foil 5 and the cathode foil 6, when the folding portion of the separator 2 is cut. In addition, there is no possibility of accidentally cutting the anode foil 5 and the cathode foil 6.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, an electrolytic capacitor has been described as an example of the capacitor. However, the present invention is not limited to this, and can be applied to various capacitors and capacitors such as an electric double layer capacitor and an electrochemical capacitor, and further to a battery. it can.

It is a perspective view which shows the whole image of the winding apparatus in an Example. It is a top view which shows electrode foil and a separator. It is a conceptual diagram which shows the manufacturing process of a capacitor | condenser element. It is a conceptual diagram which shows the manufacturing process of a capacitor | condenser element. It is a conceptual diagram which shows the manufacturing process of a capacitor | condenser element. It is a conceptual diagram which shows the manufacturing process of a capacitor | condenser element. It is a perspective view which shows a capacitor | condenser element. It is a conceptual diagram which shows the modification of the manufacturing process of a capacitor | condenser element.

Explanation of symbols

1 Winding device 2 Separator 5 Anode foil (electrode foil)
6 Cathode foil (electrode foil)
7 Winding plate (winding shaft)
10 Presser Plate 20 Capacitor Element 24 Laminate Film 25 Electrolytic Capacitor 26 Cutting Device 26a Cutting Blade

Claims (4)

  The anode foil and the cathode foil are laminated on the flat surface of the separator by bending a belt-like separator having a plurality of rectangular anode foils and cathode foils appropriately arranged on the surface and winding the separator into a flat plate shape. A method for producing a capacitor, comprising removing a bent portion of a separator on which a foil and a cathode foil are not disposed.   The method for producing a capacitor according to claim 1, wherein the anode foil and the cathode foil are wound by being disposed on a flat plate surface of a separator having a winding dimension larger than the width dimension of the foil.   The method for manufacturing a capacitor according to claim 2, wherein the separator is wound using a winding axis having a winding dimension larger than a width dimension of the anode foil and the cathode foil.   4. The anode foil and the cathode foil are appropriately disposed on the same surface of the separator, and the anode foil and the cathode foil are laminated via the separator by winding the separator. Of manufacturing the capacitor.

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