JP4967146B2 - Capacitor manufacturing method - Google Patents

Description

The present invention relates to a method of manufacturing a capacitor formed by laminating the both electrode foils by winding a plurality of flat plate-like bending a rectangular strip-shaped separator disposed anode foil and the cathode foil of the surface.

  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, a method of manufacturing a capacitor 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 is already known (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. Has advantages that can be avoided.

Japanese Examined Patent Publication No. 2-52850 (right column on page 2, FIGS. 1 and 4)

  However, the winding type capacitor described in Patent Document 1 requires two separators for adhering the anode foil and the cathode foil, and the foils can be directly opposed to each other without causing a positional deviation after winding. As described above, it has been pointed out that there is a problem in that the thickness of the capacitor wound in a flat plate shape is increased because two separators are used, and thus the thickness of the capacitor wound in a flat plate shape is increased.

The present invention has been made in view of the above-mentioned problems, enables the placement position of the anode and cathode electrode foils on the separator with high accuracy, and can be easily wound without causing a positional shift between both electrode foils, with finish as much as possible the thickness of capacitor wound and wound in a plate shape, and its object is to provide a method of manufacturing a capacitor which can be downsized width of the capacitor.

According to a first aspect of the present invention, there is provided a method of manufacturing a capacitor, wherein a plurality of rectangular anode foils and cathode foils are appropriately disposed on a surface, and a strip separator is bent and wound into a flat plate shape to thereby form the anode foil and the cathode foil. A method of manufacturing a capacitor in which
An anode foil and a cathode foil are appropriately disposed on the same surface of the separator. When the number of anode foils to be disposed on the separator is an even number, one cathode foil is first disposed on the separator, and then two sheets When the number of anode foils arranged on the separator is an odd number, the anode foil is first arranged on the separator. Then, by alternately arranging two cathode foils and two anode foils and winding the separator, the anode foil and the cathode foil are alternately stacked via the separator, and the winding is performed. Two cathode foils are arranged on the outermost periphery of the separator.
According to this feature, since the anode foil and the cathode foil need only be arranged on the same surface of the strip-shaped separator, 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. And since two cathode foils are arrange | positioned at the outermost periphery of the wound separator, the electrical property of a capacitor | condenser, ie, an ESR characteristic, is improved. Furthermore, since winding can be performed with the minimum number of cathode foils that function effectively as a capacitor with respect to the number of anode foils, the capacitor after winding can be made thinner.

A capacitor manufacturing method according to claim 2 of the present invention is the capacitor manufacturing method according to claim 1 ,
When the winding shaft is rotated in the vertical direction and the separator is wound by the winding shaft, the anode foil and the cathode foil are arranged on the same surface of the separator as the outside.
According to this feature, the anode foil and the cathode foil can be disposed on the separator disposed on the winding shaft, and the anode foil and the cathode foil can be accurately laminated, and at least after the winding shaft is rotated once. Since the anode foil and the cathode foil are sandwiched between the separators, the anode foil and the cathode foil are less likely to be affected by the positional deviation of the anode foil and the cathode foil that are generated when the separator is wound and enlarged.

A capacitor manufacturing method according to claim 3 of the present invention is the capacitor manufacturing method according to claim 1 or 2 ,
The anode foil or the cathode foil placed on the leading end of the separator at the beginning of winding is characterized by being wound while being pressed by a pressing plate.
According to this feature, since the separator and the winding shaft are pressed by the presser plate until the separator is wound around the winding shaft, slip at the beginning of winding can be suppressed. After the separator is wound around the winding shaft, the thickness of the capacitor element after winding can be reduced by removing the holding plate as appropriate.

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 ,
Both the electrode foils are arranged to be immovable by an adhesive coated on one surface of the separator.
According to this feature, the electrode foil can be disposed on the one surface side of the separator so as not to be moved by the adhesive, so that the electrode foil does not cause misalignment during winding. In addition, it is preferable that the coating amount of the adhesive is small because the influence on the electrical characteristics is small, and the rectangular two electrode foils are at least near the two corners on the leading side of the four corners. Is preferably attached to the separator via an adhesive to prevent the electrode foil from being rolled up by the separator during winding.

A capacitor manufacturing method according to claim 5 of the present invention is the capacitor manufacturing method according to any one of claims 1 to 4 ,
Both the rectangular electrode foils are characterized by chamfering the corners on the leading side to be wound out of the four corners.
According to this feature, by chamfering at least one of the two corners on the leading side on which the electrode foil is wound, the corner on the leading side on which the electrode foil is wound is wound by the separator. You can prevent it from getting caught by being caught.

A capacitor manufacturing method according to claim 6 of the present invention is the capacitor manufacturing method according to claim 1 ,
When the winding shaft is rotated in the vertical direction and the separator is wound by the winding shaft, the anode foil and the cathode foil are arranged on the same surface of the separator that is inside.
According to this feature, since the anode foil and the cathode foil are sandwiched between the separators at least before the winding shaft is half-rotated, the surface of the separator on which the anode foil and the cathode foil are disposed faces downward. This prevents the anode foil and the cathode foil from falling off the separator.

The method for manufacturing a capacitor according to claim 7 of the present invention is the method for manufacturing a capacitor according to claim 1 or 6 ,
When the separator is wound, the outer surface side of the separator before winding is pressed by the pressing means, and the V shape formed by the outer surface side of the wound separator and the inner surface side of the separator before winding. An anode foil and a cathode foil are disposed between the valleys.
According to this feature, the anode foil and the cathode foil can be accurately arranged by the V-shaped valley formed in the separator, and the outer surface side of the separator before winding is pressed by the pressing means, so that the V-shaped valley is narrowed. Thus, positioning of the anode foil and the cathode foil can be performed, and even when the separator is wound up and enlarged, the displacement of the anode foil and the cathode foil can be prevented.

The method for manufacturing a capacitor according to claim 8 of the present invention is the method for manufacturing a capacitor according to claim 1, 6 or 7 ,
The separator at the beginning of winding is sandwiched between a presser plate and a winding shaft.
According to this feature, the slip at the beginning of winding of the separator can be suppressed at least until the separator is wound around the winding shaft. After the separator is wound around the winding shaft, the thickness of the capacitor element after winding can be reduced by removing the holding plate as appropriate.

A method for manufacturing a capacitor according to claim 9 of the present invention is the method for manufacturing a capacitor according to any one of claims 1 to 8 ,
The belt-shaped separator is wound into a flat plate shape, and then both surfaces finished into a flat plate shape are press-shaped.
According to this feature, the thickness of the capacitor after winding can be further reduced by press-shaping both surfaces finished in a flat plate shape.

It is described below with reference to the best mode embodiment for carrying out the method for manufacturing a capacitor according to the present invention.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an entire image of a winding device in Embodiment 1, and FIG. 2 shows a state in which an electrode foil is placed on a separator. 3 is a plan view showing an electrode foil and a separator, FIG. 4 is a perspective view showing an anode foil that is cold-welded, and FIG. 5 is a diagram showing two laminated anode foils. FIG. 6, FIG. 7 and FIG. 8 are conceptual views showing the manufacturing process of the capacitor element, and FIG. 9 is a perspective view showing the capacitor element.

  Reference numeral 1 in FIG. 1 denotes a winding device for carrying out the electrolytic capacitor manufacturing method of the present invention. A strip-shaped separator 2 is wound around and attached to the winding device 1 in a roll shape. An adhesive 3 (see FIG. 3) is applied to one surface of the separator 2, and a strip-shaped release paper 4 is attached to the surface to which the adhesive 3 is applied. 2 is integrally wound.

  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 counterclockwise (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 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. The release paper 4 to which the separator 2 is attached is peeled off and wound up while the separator 2 is guided by the roller 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 on the upper surface of the winding plate 7.

  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 on the upper surface of the reel plate 7. By repeating this operation, the separator 2 is wound in a flat plate shape while winding the electrode foils 5 and 6.

  As shown in FIG. 2, the upper surface of the separator 2 attached to the winding plate 7 is a flat surface, and two anode foils 5 and two cathode foils 6 are alternately placed on the separator 2. It has become. As shown in FIG. 3, 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 and an anode foil 5 with an aluminum tab 16 attached on the left side in plan view. Four types of electrode foils 5 and 6 are used: a cathode foil 6 with an aluminum tab 17 extended on the right side 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 disposed so that the adjacent anode foil 5 and the aluminum tab 16 are close to each other, the cathode foil 6 is disposed such that the adjacent cathode foil 6 and the aluminum tab 17 are separated, and the separator is wound. In this case, the aluminum tabs 16 and 17 are overlapped together. The aluminum tab 17 of the cathode foil 6 may be disposed close to the separator, and the aluminum tab 16 of the anode foil 5 may be disposed so as to be separated from the separator.

  Further, as shown in FIG. 3, 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.

  As shown in FIG. 3, the adhesive 3 applied to the separator 2 is applied in a straight line on the surface on which the electrode foils 5 and 6 are placed, and the adhesive 2 is applied to the separator 2. The mounted surface is attached to the winding plate 7 so that the surface becomes upward. The pressure-sensitive adhesive 3 is not limited to the above-mentioned two items, and may be one item or a plurality of items. Furthermore, the pressure-sensitive adhesive 3 may be intermittently applied along the longitudinal direction of the separator 2. When the pressure-sensitive adhesive 3 is applied intermittently, the electrolytic solution is impregnated when the capacitor element 20 is impregnated with the electrolytic solution. Is preferable because it easily penetrates through the gap between the pressure-sensitive adhesives 3 and improves the impregnation of the electrolytic solution. In addition, since the electrode foils 5 and 6 can be arranged immovably by the pressure-sensitive adhesive 3 coated on one surface of the separator 2, the electrode foils 5 and 6 do not cause misalignment during winding.

  Further, the electrode foils 5 and 6 shown in FIG. 3 have a substantially rectangular shape in a plan view, and of the four corners, the two corners on the leading side to be wound are chamfered and rounded. Has corners. Thus, by chamfering the two corners on the leading side around which the electrode foils 5 and 6 are wound, the two corners on the leading side around which the electrode foils 5 and 6 are wound are wound by the separator 2 during winding. It is designed to prevent you from getting caught by being caught. Note that all four corners of the electrode foils 5 and 6 may be chamfered, or only one corner of the preceding two corners may be chamfered.

  Anode foil 5 and cathode foil 6 shown in FIG. 3 are each formed of aluminum. The aluminum tab 17 of the cathode foil 6 is formed integrally with the cathode foil 6, but an aluminum tab may be attached separately. Next, the anode foil 5 will be described in detail. As shown in FIG. 4, the anode foil 5 is interposed between two aluminum foils 18 and the two aluminum foils 18 in order to increase the capacitance of the electrolytic capacitor. It is comprised with the aluminum tab 16 which protrudes outside inserted.

  In two portions of the aluminum foil 18 shown in FIG. 4 where the aluminum tabs 16 are inserted, press contact positions 19 that are pressed from the outside and are cold pressed are formed. The two aluminum foils 18 and the aluminum tabs 16 are connected by the pressure contact position 19. In this case, the aluminum tabs 16 can be connected to the two aluminum foils 18 respectively, but the number of the aluminum tabs 16 increases and the capacitor element becomes thick. Therefore, it is possible to connect two aluminum foils 18 by superimposing them and placing an aluminum tab 16 thereon and cold-welding them, but the superposed aluminum foils 18 are hard oxides formed on their surfaces. Since the coating faces each other, it is difficult to connect the aluminum ingots beyond the oxide coating. Therefore, the aluminum tab 16 is interposed between the two anode foils 5 and cold-welded. Thus, the two anode foils 5 having the hard oxide film formed on the surface are connected to face the relatively soft aluminum tab 16 having no oxide film on the surface, so that the connection is highly reliable. In addition, since the aluminum tab 16 is inserted into the aluminum foil 18 and the corners thereof are protected by the aluminum foil 18, the separator is not damaged by the corners of the aluminum tab 16. Further, since the aluminum tab 16 is interposed between the two aluminum foils and is cold-welded at two points, the aluminum tab 16 can be securely attached to the aluminum foil 18 while preventing the aluminum tab 16 from rotating.

  As shown in the partially enlarged view of FIG. 5, when the two aluminum foils 18 and the aluminum tab 16 are pressed, the aluminum foil 18 is slightly raised around the pressing position 19 by cold pressing. For example, when the pressure contact position 19 of each laminated anode foil 5 is formed at the same position, the swelled part formed by the pressure contact position 19 overlaps, and only that portion is in a bulging state, so that manufacturing As a result, the thickness of the capacitor element 20 is increased.

  Therefore, as shown in FIG. 5, the two press-contact positions 19 that are cold-welded are the respective anodes stacked in the state where the separator 2 is wound by the winding device 1 and stacked inside the separator 2. Each foil 5 is set to a position shifted as much as possible. By shifting the two pressure contact positions 19, it is possible to prevent the pressure contact positions 19 of the aluminum tabs 16 from being overlapped after winding, and only the portions to bulge out. Therefore, the thickness of the manufactured capacitor element 20 can be reduced. In this embodiment, cold welding is used as the connection between the aluminum foil 18 and the aluminum tab 16, but the present invention is not limited to this, and it is also possible to connect by ultrasonic welding, stitching, laser, or the like.

  The manufacturing process will be described in detail with reference to conceptual diagrams of the capacitor element 20 shown in FIGS. First, as shown in FIG. 6A, the tip of the separator 2 is placed on the upper surface of the winding plate 7, and the first cathode foil 6 is attached to the winding plate 7 by the arm 14 from the slide plate 13. Move to the top. Next, as shown in FIG. 6 (b), the presser plate 10 is brought into contact with the upper side of the first cathode foil 6, and the leading end portion of the separator 2 and the first cathode are separated by the winding plate 7 and the presser plate 10. Press so as to sandwich the foil 6. Since the separator 2 can easily fix the electrode foils 5 and 6 by the applied adhesive 3, it is only placed so that a part of the cathode foil 6 is positioned on the separator 2 at the beginning of winding. Therefore, the separator 2 can be saved and the thickness of the capacitor element 20 can be reduced.

  Next, as shown in FIG. 6C, the drive units 8 and 9 are driven to invert the winding plate 7 and the presser plate 10 by 180 °. Then, the first cathode foil 6 is disposed on the lower surface of the winding plate 7. Since the separator 2 and the winding plate 7 are pressed by the holding plate 10 until the separator 2 is wound around the winding plate 7, the slip of the separator 2 and the cathode foil 6 at the start of winding can be suppressed.

  Then, the first anode foil 5 is placed on the separator 2 on the upper surface side of the winding plate 7. Further, as shown in FIG. 6D, when the drive units 8 and 9 are driven to reverse the winding plate 7 and the holding plate 10 by 180 °, the winding plate 7 and the holding plate 10 are positioned at the beginning of winding. 360 ° (one rotation) from the beginning. At this time, the anode foil 5 on the lower surface side of the reel plate 7 is held by the adhesive 3 applied to the separator 2.

  Further, as shown in FIG. 7E, the presser plate 10 is slid in the horizontal direction and extracted from the wound separator 2. Thus, after the separator 2 is wound around the winding shaft 7, the thickness of the capacitor element 20 after winding can be reduced by removing the presser plate 10. Next, the second anode foil 5 is placed on the separator 2 on the upper surface side of the winding plate 7.

  And as shown in FIG.7 (f), the drive part 8 is driven and the winding plate 7 is reversed 180 degrees. At this time, the anode foil 5 on the lower surface side of the winding plate 7 is held by the adhesive 3 applied to the separator 2. Then, the second cathode foil 6 is placed on the separator 2 on the upper surface side of the winding plate 7. Further, the first anode foil 5 is sandwiched between the separators 2, and thereafter the anode foil 5 disposed on the separator 2 on the upper surface side of the winding plate 7 every time the winding plate 7 is rotated once. The cathode foil 6 is sandwiched and laminated between the separators 2.

  As shown in FIG. 7G, the driving unit 8 is driven to invert the winding plate 7 by 180 °, and the third cathode foil 6 is placed on the separator 2 on the upper surface side of the winding plate 7. Put. 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 outside the separator 2. Will be placed in. 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. Compared to 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 foil varies depending on the number of windings, and the electrode foil must be arranged in advance in consideration of this arrangement distance. You can save time and effort. And the separator 2 is cut | disconnected by the cutting device 12, and the tape 21 is wound around the separator 2 wound by the winding shaft board 7, as shown in FIG.7 (h). At this time, the tape 21 is directly affixed to the cathode foil 6 disposed on the outermost periphery of the wound separator 2, and in order to reduce the laminated thickness of the tape 21, the initial winding end and the end of the tape 21 are wound. They are pasted on the end of the cathode foil 6 without overlapping each other. In this way, the ESR characteristic of the electrolytic capacitor 25 is improved, and the cathode foil 6 disposed on the outermost periphery of the wound separator 26 is brought into contact with the laminate film (exterior case) 24, whereby the electrolytic capacitor The heat dissipation of 25 can also be improved.

  Next, as shown in FIG. 8 (i), the winding plate 7 is finally removed from the separator 2 wound in a flat plate shape, and both surfaces finished in a flat plate shape are pressed from above and below to be pressed. Thus, the thickness of the capacitor | condenser element 20 after winding can further be reduced by removing the winding axis | shaft board 7 and press-shaping the both surfaces finished in flat form.

  6 to 8, 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. 8 (j), one large-capacity type can be obtained by stacking three units 22 into one unit. The electrolytic capacitor element 20 is manufactured. In this way, in order to obtain a large capacity of the capacitor element 20, the number of stacked electrode foils 5 and 6 is increased, and the number of turns of the separator 2 is increased to make the capacitor element 20 of one unit. If a single unit 22 in which a small amount of electrode foils 5 and 6 are wound is laminated to form a single unit, the capacitor element increases as the number of electrode foils 5 and 6 increases. The side surface portion where no electrode foils 5 and 6 are interposed is thickened, the width dimension of the capacitor element 20 is not increased, and further, the capacitor element 20 is selected by selecting the number of stacked units 22. The capacity can be adjusted.

  In the one-unit capacitor element 20 in which a plurality of units 22 are stacked, as shown in FIG. 8 (j), 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. 9, 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.

  As described above, according to the first embodiment, the anode foil 5 and the cathode foil 6 may be disposed only on the one surface side of the strip-shaped separator 2, so that the manufacturing process is simple and labor-saving. Moreover, since it can be manufactured with one separator 2, the capacitor element 20 after winding can be made thin.

  Further, the separator 2 disposed so that the plate-shaped winding plate 7 is rotated in the vertical direction and the longitudinal direction is directed in the horizontal direction is wound from above the winding plate 7, and the anode foil 5 and the cathode foil 6. Is disposed on the upper surface side of the separator 2, and when the rotating reel plate 7 is horizontal, the anode foil 5 and the cathode foil 6 are placed on the separator 2 arranged on the reel plate 7. The anode foil 5 and the cathode foil 6 can be accurately stacked. Furthermore, since the anode foil 5 and the cathode foil 6 are sandwiched between the separators 2 after at least one rotation of the winding plate 7, when the constantly rotating winding plate 7 is horizontal. The anode foil 5 and the cathode foil 6 can be disposed on the separator 2 and are not easily affected by the positional deviation of the anode foil 5 and the cathode foil 6 that occurs when the separator 2 is wound and enlarged.

  Next, a method for manufacturing an electrolytic capacitor according to Example 2 will be described with reference to FIGS. In addition, the same structure as the said Example is abbreviate | omitted. FIG. 10 is a plan view showing an electrode foil and a separator in Example 2, and FIG. 11 is a conceptual diagram showing a wound capacitor.

  As shown in FIG. 10, the electrode foils 27 and 28 placed on the separator 26 have an anode foil 27 with an aluminum tab 29 attached on the right side and an anode foil 27 with an aluminum tab 29 attached on the left side in plan view. A cathode foil 28 ′ having an aluminum tab 30 extending on the right side and having the same length as the anode foil 27; and a cathode foil 28 having an aluminum tab 30 extending on the right side and having a length corresponding to approximately two pieces of the anode foil 27. Four types of electrode foils 27 and 28 are used.

  Further, as shown in FIG. 10, on the separator 26, a length corresponding to approximately two sheets of one cathode foil 28 ′, two anode foils 27, and anode foil 27 in order from the first winding. One cathode foil 28 having the following, and thereafter two anode foils 27 and one cathode foil 28 are alternately arranged, and finally arranged on the separator so as to end with the cathode foil 28 at the end. Yes.

  As shown in FIG. 10, a plurality of adhesives 31 for attaching the electrode foils 27 and 28 to the separator 26 are applied in a circular shape on the surface of the separator 26. The pressure-sensitive adhesive 31 is applied to the separator 26 so that the vicinity of the two corners on the preceding side where the anode foil 27 is wound and the vicinity of the two corners on the leading side where the cathode foil 28 is wound can be adhered. In this way, since the two corners on the leading side where the anode foil 27 and the cathode foil 28 are wound are attached to the separator 26, the anode foil 27 and the cathode foil 28 are rolled up by the separator 26 during winding. I can prevent it.

  Further, when the separator 26 is wound around the winding shaft plate 32, it is bent at a portion indicated by a broken line L shown in FIG. When wound, the cathode foil 28 having a length corresponding to approximately two pieces of the anode foil 27 is bent at the portion indicated by the broken line L, and as shown in the conceptual diagram of FIG. Are arranged so as to sandwich the two anode foils 27 from above and below.

  In the conceptual diagram shown in FIG. 11, the number of anode foils 27 and cathode foils 28 is shown in a simplified manner. However, in Example 2, 12 anode foils 27 are formed in one unit 33, One cathode foil 28 having the same length as the wound anode foil 27 and six cathode foils 28 having a length substantially equal to two of the anode foil 27 are used.

  As described above, according to Example 2, the electrolytic capacitor element 34 after winding is made thinner by winding the minimum number of cathode foils 28 that effectively function as the capacitor element 34 with respect to the number of anode foils 27. In addition, the number of cathode foils 28 can be halved, so that the trouble of disposing the cathode foil 28 on the separator 26 can be reduced.

  Next, a method for manufacturing an electrolytic capacitor according to Example 3 will be described with reference to FIG. In addition, the same structure as the said Example is abbreviate | omitted. 12 is a perspective view showing an electrode foil and a separator in Example 3. FIG.

  As shown in FIG. 12A, first, an electrode foil 36 is disposed on one half of one surface of a separator 35 that forms a strip shape before winding. Next, as shown in FIG. 12B, the other half of the one surface side of the separator 35 on which the electrode foil 36 is not placed is folded back to the electrode foil 36 side, and the electrode foil 36 is sandwiched between the upper and lower sides by the separator 35. . Then, the front-end | tip part of the separator 35 is attached to the winding shaft board 37, and it winds in flat form, bending.

  As described above, according to the third embodiment, after the electrode foil 36 is placed on one half of the separator 35, the other half of the separator 35 is folded back to the electrode foil 36 so that the electrode foil 36 is sandwiched from both sides. The electrode foil 36 can be wound while being fixed to the separator 35 without using an adhesive.

  Next, a method for manufacturing an electrolytic capacitor according to Example 4 will be described with reference to FIG. In addition, the same structure as the said Example is abbreviate | omitted. 13 is a perspective view showing an electrode foil and a separator in Example 4. FIG.

  As shown in FIG. 13 (a), first, the electrode foil 40 is disposed on one separator 39 of the two separators 38, 39 forming a belt-like shape before winding. Next, as shown in FIG. 13B, the other separator 38 is placed on the separator 39 on which the electrode foil 40 is placed, and the electrode foil 40 is moved from both the upper and lower sides by the two separators 38 and 39. Hold it. Thereafter, the front ends of the separators 38 and 39 are attached to the winding plate 41 and wound into a flat plate shape while being bent.

  Next, a method for manufacturing an electrolytic capacitor according to Example 5 will be described with reference to FIG. In addition, the same structure as the said Example is abbreviate | omitted. FIG. 14 is a perspective view showing an electrode foil and a separator in Example 5.

  As shown in FIG. 14, first, the separator 42 before winding, which forms a wide band shape, is bent into a V shape, and arranged so that the V-shaped opening side is upward. And the electrode foil 43 is thrown in from the V-shaped opening side of the separator 42, and is arrange | positioned. Next, the V-shaped opening is closed, the electrode foil 43 is sandwiched from both sides, and then the tip of the separator 42 is attached to the winding plate 44 and wound into a flat plate shape while being bent. In this way, both electrode foils 43 are inserted and arranged from the V-shaped opening side of the separator 42, and then the V-shaped opening is closed and bent, so that the electrode foil 43 is fixed to the separator 42 without using an adhesive. Can be wound while.

  Next, a method for manufacturing an electrolytic capacitor according to Example 6 will be described with reference to FIGS. In addition, about the same component as the component shown by Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. 15, FIG. 16 and FIG. 17 are conceptual diagrams showing the manufacturing process of the capacitor element.

  In the first embodiment described above, the winding shaft 7 is rotated counterclockwise. However, in the winding device 1 in the sixth embodiment, the winding shaft 7 is rotated clockwise (indicated by the arrow in FIG. 1). The separator 2 can be wound up by being continuously rotated in the opposite direction). The separator 2 in Example 6 is not coated with the above-described pressure-sensitive adhesive 3.

  First, as shown in FIG. 15 (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 is 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. 15 (b), 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 side-viewed. A valley having a substantially V shape is formed. 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.

  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. By pressing toward the winding plate 7, the positioning device 45 narrows the lower part 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.

  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. 15 (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. 15 (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 placed 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. 16 (e), when the winding plate 7 and the presser 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. 16 (f), 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. 16G, 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 anode foil 5 is placed at a predetermined position on the separator 2 by pressing the outer surface side of the separator 2 before winding forming the V-shaped valley by the positioning device 45 and narrowing the lower part of the V-shaped valley. In addition, the cathode foil 6 can be disposed, and misalignment of the anode foil 5 and the cathode foil 6 can be prevented.

  Further, although not particularly shown, when the winding by the winding shaft plate 7 is finished, the separator 2 is cut so that the separator 2 is disposed on the outermost periphery, and the end portion of the cut separator 2 is wound. The outer side of the rotated separator 2 is fixed with tape. As in the first embodiment, it is not necessary to wind the tape 21 around the entire outermost periphery of the wound separator 2 (see FIG. 7 (h)), and it is only necessary to fix the end of the separator 2 with the tape. The work is simplified. Finally, the winding shaft plate 7 is removed from the separator 2 wound in a flat plate shape, and both surfaces finished in a flat plate shape are pressed from above and below to be press-shaped.

  Next, a modification of the winding method in the sixth embodiment will be described. First, as shown in FIG. 17 (a), the separator 2 is brought into contact with the lower surface of the reel plate 7, and the front end portion 2 a of the separator 2 is bent so as to come into contact with the upper surface of the reel 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. 17 (b), 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 side-viewed. 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, between the V-shaped valleys, 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. 17 (d), each 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 sixth embodiment, the plate-shaped winding shaft plate 7 is rotated in the vertical direction, and the separator 2 arranged so that the longitudinal direction faces the horizontal direction is wound from the lower side of the winding shaft plate 7. By arranging the anode foil 5 and the cathode foil 6 on the upper surface side of the separator 2, at least before the winding plate 7 is half-rotated, the anode foil 5 and the cathode foil 6 are separated from the separator 2. Since the surface of the separator 2 on which the anode foil 5 and the cathode foil 6 are disposed does not face downward, the anode foil 5 and the cathode foil 6 do not fall from the separator. It is not necessary to apply the pressure-sensitive adhesive 3 for holding the anode foil 5 and the cathode foil 6 as used in Example 1 to the separator 2.

  Further, when the separator 2 is wound, the outer surface side of the separator 2 before winding is pressed by the positioning device 45, and the outer surface side of the wound separator 2 and the inner surface side of the separator 2 before winding are By disposing the anode foil 5 and the cathode foil 6 between the V-shaped valleys formed in the above, the anode foil 5 and the cathode foil 6 can be accurately disposed by the V-shaped valleys formed in the separator 2. Moreover, since the outer surface side of the separator 2 before winding is pressed by the positioning device 45, the anode foil 5 and the cathode foil 6 can be positioned by narrowing the lower part of the V-shaped valley, and the separator 2 is wound. Even if it becomes large, the position shift of the anode foil 5 and the cathode foil 6 can be prevented.

  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, the electrode foils 5 and 6 are mounted on the separator 2 on the upper surface side of the winding plate 7 every time the winding plate 7 rotates 180 °. The electrode foils 5 and 6 are adhered to the surfaces of the separators 2 arranged on both sides of the upper surface and the lower surface of the winding plate 7 every time the winding plate 7 rotates 360 °. Also good.

  Moreover, in the said Example, the manufacturing method of the capacitor | condenser of this invention was applied to manufacture of the capacitor | condenser element 20 of the double anode in which one anode foil 5 is comprised by the two aluminum foil 18 being piled up. However, the present invention is not limited to this, and may be applied to the manufacture of a single anode capacitor element in which one anode foil 5 is constituted by one aluminum foil 18.

  Moreover, in the said Example, although the electrolytic capacitor was illustrated and demonstrated as a capacitor | condenser, it is not restricted to this, It can apply to various capacitors and capacitors, such as an electric double layer capacitor and an electrochemical capacitor, Furthermore, it applies also to a battery. it can.

  In the above-described embodiment, the separator is wound by rotating the winding shaft plate and the presser plate in the vertical direction. However, when the winding shaft plate and the presser plate are rotated in the horizontal direction, the separator is wound. May be wound. Furthermore, when the winding shaft plate and the presser plate are rotated in the horizontal direction, the anode foil and the cathode foil are formed in a V-shaped valley formed by the outer surface side of the wound separator and the inner surface side of the separator before winding. It may be arranged.

It is a perspective view which shows the whole image of the winding apparatus in Example 1. FIG. It is a perspective view which shows the state in which electrode foil is mounted in a separator. It is a top view which shows electrode foil and a separator. It is a perspective view which shows the anode foil cold-welded. It is a perspective view which shows two anode foils laminated | stacked. 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 top view which shows the electrode foil and separator in Example 2. It is a conceptual diagram which shows the wound capacitor | condenser. It is a perspective view which shows the electrode foil and separator in Example 3. FIG. It is a perspective view which shows the electrode foil and separator in Example 4. It is a perspective view which shows the electrode foil and separator in Example 5. FIG. FIG. 10 is a conceptual diagram illustrating a manufacturing process of a capacitor element in Example 6. FIG. 10 is a conceptual diagram illustrating a manufacturing process of a capacitor element in Example 6. FIG. 10 is a conceptual diagram illustrating a manufacturing process of a capacitor element in Example 6.

Explanation of symbols

1 Winding device 2 Separator 3 Adhesive 5 Anode foil (electrode foil)
6 Cathode foil (electrode foil)
7 Winding plate (winding shaft)
10 Presser plates 16 and 17 Aluminum tab 18 Aluminum foil 20 Capacitor element 22 Unit 25 Electrolytic capacitor 26 Separator 27 Anode foil (electrode foil)
28 Cathode foil (electrode foil)
29, 30 Aluminum tab 32 Reel plate (reel)
33 Unit 34 Capacitor element 35 Separator 36 Electrode foil (anode foil, cathode foil)
37 Winding shaft (winding shaft)
38, 39 Separator 40 Electrode foil (anode foil, cathode foil)
41 Winding plate (winding shaft)
42 Separator 43 Electrode foil (anode foil, cathode foil)
44 Winding plate (winding shaft)
45 Positioning device (pressing means)
46 Roller 47 Biasing means

Claims (9)

A method of manufacturing a capacitor in which a plurality of rectangular anode foils and cathode foils are appropriately disposed on a surface and a strip separator is folded and wound into a flat plate shape to laminate the anode foil and the cathode foil,
An anode foil and a cathode foil are appropriately disposed on the same surface of the separator. When the number of anode foils to be disposed on the separator is an even number, one cathode foil is first disposed on the separator, and then two sheets When the number of anode foils arranged on the separator is an odd number, the anode foil is first arranged on the separator. Then, by alternately arranging two cathode foils and two anode foils and winding the separator, the anode foil and the cathode foil are alternately stacked via the separator, and the winding is performed. A method of manufacturing a capacitor, comprising disposing two cathode foils on the outermost periphery of the separator. Winding shaft is rotated in the vertical direction, when the separator is wound by the winding shaft, on the same surface of the separator comprising an outer, manufacture of a capacitor according to claim 1 to place the anode foil and the cathode foil Method. 3. The method of manufacturing a capacitor according to claim 1, wherein the anode foil or the cathode foil placed on the tip of the separator at the beginning of winding is wound while being pressed by a holding plate. 4. The method for manufacturing a capacitor according to claim 1, wherein the two electrode foils are disposed so as to be immovable by an adhesive applied to one surface of the separator. 5. 5. The method of manufacturing a capacitor according to claim 1, wherein both rectangular rectangular electrode foils have chamfered corners on the leading side to be wound among four corners. Winding shaft is rotated in the vertical direction, when the separator is wound by the winding shaft, on the same surface of the separator facing inward, producing a capacitor according to claim 1 to place the anode foil and the cathode foil Method. When the separator is wound, the outer surface side of the separator before winding is pressed by the pressing means, and the V shape formed by the outer surface side of the wound separator and the inner surface side of the separator before winding. method for producing a capacitor according to claim 1 or 6 in the valley placing anode foil and the cathode foil. The method for manufacturing a capacitor according to claim 1, 6 or 7 , wherein the separator at the beginning of winding is clamped by a presser plate and a winding shaft. 9. The method of manufacturing a capacitor according to claim 1, wherein the strip-shaped separator is wound into a flat plate shape, and then both surfaces finished into a flat plate shape are press-shaped.

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