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WO2018159426A1 - Condensateur électrolytique - Google Patents

Condensateur électrolytique Download PDF

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Publication number
WO2018159426A1
WO2018159426A1 PCT/JP2018/006332 JP2018006332W WO2018159426A1 WO 2018159426 A1 WO2018159426 A1 WO 2018159426A1 JP 2018006332 W JP2018006332 W JP 2018006332W WO 2018159426 A1 WO2018159426 A1 WO 2018159426A1
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WIPO (PCT)
Prior art keywords
lead terminal
anode
anode lead
bent portion
cathode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/006332
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English (en)
Japanese (ja)
Inventor
敦 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2019502917A priority Critical patent/JPWO2018159426A1/ja
Publication of WO2018159426A1 publication Critical patent/WO2018159426A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/008—Terminals
    • H01G9/012—Terminals specially adapted for solid capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
    • H01G9/052—Sintered electrodes

Definitions

  • the present invention relates to an electrolytic capacitor, and more particularly to an electrolytic capacitor having a bent anode lead terminal.
  • Electrolytic capacitors are mounted on various electronic devices because of their low equivalent series resistance (ESR) and excellent frequency characteristics.
  • the electrolytic capacitor usually includes a capacitor element including an anode part and a cathode part, an anode lead terminal electrically connected to the anode part, and a cathode lead terminal electrically connected to the cathode part.
  • the anode part has an anode body and an anode wire extending from the anode body.
  • the anode lead terminal is, for example, a long plate-like member, and an anode wire is bonded to one main surface.
  • the capacitor element is usually sealed with an exterior body.
  • the anode lead terminal is bent a plurality of times and led out from the exterior body, and then further bent along the outer shape of the exterior body (Patent Document 1 and the like).
  • the anode lead terminal 113 of the electrolytic capacitor 120 of Patent Document 1 is bent approximately in a U shape.
  • the anode lead terminal 113 further includes a bent portion B that bends the anode lead terminal 113 in a direction away from the anode wire 102 inside the exterior body 111.
  • the anode lead terminal 113 led out from the exterior body 111 is bent along the outer shape of the exterior body 111, the anode lead terminal 113 is connected from the anode wire 102 to the anode lead terminal 113 inside the exterior body 111. Stress F in the direction of peeling works.
  • the presence of the bent portion B makes it easier for the anode lead terminal 113 to be peeled off from the anode wire 102.
  • the anode lead terminal 113 moves due to the stress F, the position of the anode wire 102 is easily displaced.
  • peeling may occur at the boundary between the anode body constituting the capacitor element 110 and the anode wire 102. Therefore, the leakage current is likely to increase.
  • a first aspect of the present invention includes a capacitor element including an anode part and a cathode part, an anode lead terminal electrically connected to the anode part and having a first main surface and a second main surface, and the cathode part.
  • An electrolytic capacitor comprising: a cathode lead terminal to be electrically connected; and an exterior body that covers the capacitor element and exposes at least a part of the anode lead terminal and the cathode lead terminal.
  • an external bent portion outside the exterior body, and the internal bent portion is located in front of the anode lead terminal extending from the joint portion with the anode wire at a position not in contact with the anode wire.
  • the present invention relates to an electrolytic capacitor comprising: a second external bent portion that bends an anode lead terminal along the outer shape of the outer package and places the anode lead terminal on a mounting surface of the outer package.
  • the anode lead terminal can be bent outside the exterior body without applying a load to the anode wire, displacement of the anode wire and peeling from the anode lead terminal are suppressed. Therefore, the leakage current is reduced.
  • FIG. 1 is a schematic cross-sectional view of an electrolytic capacitor 20 according to this embodiment.
  • FIG. 2 is an enlarged schematic cross-sectional view showing the main part of the electrolytic capacitor 20 according to one embodiment of the present invention.
  • the electrolytic capacitor 20 includes a capacitor element 10 having an anode portion 6 and a cathode portion 7, an exterior body 11 that seals the capacitor element 10, an electrical connection with the anode portion 6, and a part from the exterior body 11.
  • An exposed anode lead terminal 13 and a cathode lead terminal 14 electrically connected to the cathode portion 7 and partially exposed from the exterior body 11 are provided.
  • the anode unit 6 includes an anode body 1 including a dielectric layer 3 and an anode wire 2.
  • the cathode portion 7 includes a solid electrolyte layer 4 formed on the dielectric layer 3 and a cathode layer 5 that covers the surface of the solid electrolyte layer 4.
  • the anode section 6 includes an anode body 1 and an anode wire 2 that extends from one surface of the anode body 1 and is electrically connected to the anode lead terminal 13.
  • the soot anode body 1 is, for example, a rectangular parallelepiped porous sintered body obtained by sintering metal particles.
  • metal particles valve action metal particles such as titanium (Ti), tantalum (Ta), and niobium (Nb) are used.
  • One type or two or more types of metal particles are used for the anode body 1.
  • the metal particles may be an alloy composed of two or more metals.
  • an alloy containing a valve action metal and silicon, vanadium, boron, or the like can be used.
  • a compound containing a valve metal and a typical element such as nitrogen may be used.
  • the alloy of the valve action metal preferably contains the valve action metal as a main component and contains 50 atom% or more of the valve action metal.
  • Anode wire 2 is made of a conductive material.
  • the material of the anode wire 2 is not specifically limited, For example, copper, aluminum, aluminum alloy etc. other than the said valve action metal are mentioned.
  • the materials constituting the anode body 1 and the anode wire 2 may be the same or different.
  • the anode wire 2 includes a first portion 2 a embedded from one surface of the anode body 1 into the anode body 1 and a second portion 2 b extending from the one surface of the anode body 1.
  • the cross-sectional shape of the anode wire 2 is not particularly limited, and is a circular shape or a shape obtained by crushing a circular shape (a shape consisting of straight lines parallel to each other and two curves connecting the ends of these straight lines.
  • the diameter of the anode wire 2 (long diameter in the case of a track shape and an elliptical shape) is not particularly limited, but is, for example, 0.1 mm to 1.0 mm.
  • the soot anode part 6 is produced, for example, by pressing and sintering in a rectangular parallelepiped shape with the first part 2a embedded in the powder of the metal particles. Thereby, it pulls out so that the 2nd part 2b of the anode wire 2 may be planted from one surface of the anode body 1.
  • FIG. The second portion 2b is joined to the anode lead terminal 13 by welding or the like, and the anode wire 2 and the anode lead terminal 13 are electrically connected.
  • the method of welding is not particularly limited, and examples include resistance welding and laser welding.
  • a dielectric layer 3 is formed on the surface of the anode body 1.
  • the dielectric layer 3 is made of, for example, a metal oxide.
  • a method for forming a layer containing a metal oxide on the surface of the anode body for example, a method of anodic oxidation of the surface of the anode body 1 by immersing the anode body 1 in a chemical conversion solution, The method of heating in the atmosphere containing is mentioned.
  • the dielectric layer 3 is not limited to the layer containing the metal oxide, and may have an insulating property.
  • the cathode portion 7 includes a solid electrolyte layer 4 formed on the dielectric layer 3 and a cathode layer 5 that covers the solid electrolyte layer 4.
  • the solid electrolyte layer 4 only needs to be formed so as to cover at least a part of the dielectric layer 3.
  • a manganese compound or a conductive polymer is used for the solid electrolyte layer 4.
  • the conductive polymer include polypyrrole, polythiophene, polyfuran, polyaniline, polyacetylene, polyphenylene, polyparaphenylene vinylene, polyacene, polythiophene vinylene, polyfluorene, polyvinyl carbazole, polyvinyl phenol, polypyridine, and derivatives of these polymers. Can be mentioned. These may be used alone or in combination of two or more.
  • the conductive polymer may be a copolymer of two or more monomers. Among these, polythiophene, polyaniline, polypyrrole, and the like are preferable in terms of excellent conductivity. Of these, polypyrrole is preferred because of its excellent water repellency.
  • the solid electrolyte layer 4 containing the conductive polymer is formed, for example, by polymerizing a raw material monomer on the dielectric layer 3. Alternatively, it is formed by applying a liquid containing the conductive polymer to the dielectric layer 3.
  • the solid electrolyte layer 4 is composed of one or more solid electrolyte layers. When the solid electrolyte layer 4 is composed of two or more layers, the composition and formation method (polymerization method) of the conductive polymer used in each layer may be different.
  • polypyrrole, polythiophene, polyfuran, polyaniline and the like mean polymers having a basic skeleton of polypyrrole, polythiophene, polyfuran, polyaniline and the like, respectively. Accordingly, polypyrrole, polythiophene, polyfuran, polyaniline and the like can also include respective derivatives.
  • polythiophene includes poly (3,4-ethylenedioxythiophene) and the like.
  • various dopants may be added to the polymerization liquid, conductive polymer solution or dispersion for forming the conductive polymer.
  • the dopant is not particularly limited, but 1,5-naphthalenedisulfonic acid, 1,6-naphthalenedisulfonic acid, 1-octanesulfonic acid, 1-naphthalenesulfonic acid, 2-naphthalenesulfonic acid, 2,6-naphthalenedisulfonic acid, 2,7-naphthalenedisulfonic acid, 2-methyl-5-isopropylbenzenesulfonic acid, 4-octylbenzenesulfonic acid, 4-nitrotoluene-2-sulfonic acid, m-nitrobenzenesulfonic acid, n-octylsulfonic acid, n-butane Sulfonic acid, n-hexanesulfonic acid, o-nitrobenzenesulfonic acid,
  • the derivatives include metal salts such as lithium salt, potassium salt and sodium salt, ammonium salts such as methylammonium salt, dimethylammonium salt and trimethylammonium salt, piperidinium salt, pyrrolidinium salt and pyrrolinium salt.
  • the average particle diameter D50 of the particles is preferably 0.01 ⁇ m to 0.5 ⁇ m, for example. If the average particle diameter D50 of the particles is within this range, the particles easily penetrate into the anode body 1.
  • the cathode layer 5 has, for example, a carbon layer 5a formed so as to cover the solid electrolyte layer 4, and a metal paste layer 5b formed on the surface of the carbon layer 5a.
  • the carbon layer 5a includes a conductive carbon material such as graphite and a resin.
  • the metal paste layer 5b includes, for example, metal particles (for example, silver) and a resin.
  • the configuration of the cathode layer 5 is not limited to this configuration.
  • the structure of the cathode layer 5 should just be a structure which has a current collection function.
  • the anode lead terminal 13 is electrically connected to the anode body 1 through the second portion 2 b of the anode wire 2.
  • the material of the anode lead terminal 13 is not particularly limited as long as it is electrochemically and chemically stable and has conductivity, and may be a metal or a nonmetal.
  • the shape is not particularly limited as long as it is a long and flat plate having the first main surface 13X and the second main surface 13Y.
  • the thickness of the anode lead terminal 13 (distance between the main surfaces of the anode lead terminal 13) is preferably 25 ⁇ m to 200 ⁇ m, more preferably 25 ⁇ m to 100 ⁇ m, from the viewpoint of reducing the height.
  • the anode lead terminal 13 may be joined to the anode wire 2 by a conductive adhesive or solder, or may be joined to the anode wire 2 by resistance welding or laser welding.
  • the conductive adhesive is, for example, a mixture of a thermosetting resin described later and carbon particles or metal particles.
  • the anode lead terminal 13 includes two internal bent portions 130 inside the exterior body 11 and two external bent portions 131 outside the exterior body 11. Further, as shown in an enlarged view in FIG. 2, the internal bent portion 130 is configured so that the anode lead terminal 13 extending from the joint portion W with the anode wire 2 is located on the first main surface 13 ⁇ / b> X side at a position not in contact with the anode wire 2.
  • the external bent portion 131 includes a first external bent portion 1311 that bends the anode lead terminal 13 led out from the outer package 11 again to the first main surface 13X side, and an anode lead bent by the first external bent portion 1311.
  • the terminal 13 includes a second external bent portion 1312 that is bent along the outer shape of the exterior body 11 and disposed on the mounting surface 11 ⁇ / b> X of the exterior body 11.
  • a bending part is not limited to this, You may provide the other bending part in the range which does not disturb the function of each bending part.
  • the anode lead terminal 13 joined to the anode wire 2 has a joint portion W in the vicinity of one end portion 13T1, and includes a first internal bent portion 1301 in the vicinity of the joint portion W. Subsequently, a second inner bent portion 1302, a first outer bent portion 1311, and a second outer bent portion 1312 are provided.
  • the region including the end portion 13T1 of the anode lead terminal 13 and the joint portion W, the region from the first internal bent portion 1301 to the joint region R0, and the region from the first internal bent portion 1301 to the second internal bent portion 1302 are bent regions.
  • a region from R1 and the second inner bent portion 1302 to the first outer bent portion 1311 is defined as a bent region R2.
  • the region from the first external bent portion 1311 to the second external bent portion 1312 includes the bent region R3, and the second external bent portion 1312 to the other end 13T2, and the region disposed on the mounting surface 11X is the bent region. R4.
  • the size of each region is not particularly limited, and may be set as appropriate according to the shape and size of the outer package 11, the length and diameter of the anode wire 2, and the like.
  • the inner bending portion 130 is sealed together with the capacitor element 10 and disposed inside the outer package 11. Therefore, the internal bent portion 130 is formed before the sealing step for sealing the capacitor element 10.
  • the internal bent portion 130 is formed before joining with the anode wire 2.
  • the external bent portion 131 is exposed from the exterior body 11 without being sealed. Therefore, considering the sealing process, the external bent portion 131 is formed after the sealing process. That is, the external bent portion 131 is formed with respect to the anode lead terminal 13 that is bonded to the anode body 1 and includes the internal bent portion 130.
  • the internal bent portion 130 has a function of relaxing or absorbing stress applied to the anode lead terminal 13 (and thus the anode wire 2 bonded to the anode lead terminal 13) when the external bent portion 131 is formed. Thereby, the bonding between the anode lead terminal 13 and the anode wire 2 is maintained, the positional deviation of the anode wire 2 is suppressed, and the peeling between the anode wire 2 and the anode body 1 is suppressed.
  • the second external bent portion 1312 is formed after the first external bent portion 1311 will be described as an example.
  • the first internal bent portion 1301 is located in the vicinity of the joint W with the anode wire 2 and bends the anode lead terminal 13 to the first main surface 13X side at a position not in contact with the anode wire 2.
  • the angle of bending (bending angle ⁇ 1) of anode lead terminal 13 by first internal bent portion 1301 is not particularly limited, but is preferably 75 to 135 °. Thereby, when forming the external bending part 131, the stress concerning the anode lead terminal 13 becomes still easier to be relieved.
  • the bending angle ⁇ 1 is an angle formed by the first main surface 13X in the bonding region R0 and the first main surface 13X in the bending region R1.
  • the second internal bent portion 1302 bends the anode lead terminal 13 bent by the first internal bent portion 1301 in the direction along the anode wire 2 and leads out from the exterior body 11.
  • the angle of bending (bending angle ⁇ 2) of anode lead terminal 13 by second internal bent portion 1302 is not particularly limited, but is preferably 75 to 135 °. Thereby, when forming the external bending part 131, the stress concerning the anode lead terminal 13 becomes still easier to be relieved.
  • the bending angle ⁇ 2 is an angle formed between the second main surface 13Y in the bending region R1 and the second main surface 13Y in the bending region R2.
  • the first main surface 13X (or second main surface 13Y) in the bent region R2 and the anode wire 2 may not be parallel, and the first main surface 13X (or second main surface 13Y) in the bent region R2 and the anode wire.
  • the angle formed by 2 may be 0 to 20 °.
  • the first external bent portion 1311 bends the anode lead terminal 13 led out from the outer package 11 to the first main surface 13X side.
  • the anode lead terminal 13 is pulled in the direction along the anode wire 2 to the outside of the capacitor element 10 (tensile force F 1) and pulled toward the first main surface 13 X side.
  • Force tensile force F2
  • the tensile force F ⁇ b> 1 acts to cause the joining region R ⁇ b> 0 of the anode lead terminal 13 to be laterally shifted and to peel off the anode lead terminal 13 and the anode wire 2.
  • the tensile force F2 acts to push up the joining region R0 of the anode lead terminal 13 to the second main surface side and peel off the anode lead terminal 13 and the anode wire 2.
  • the bending angle ⁇ 1 and the bending angle ⁇ 2 of the internal bending portion 130 increase. That is, the tensile force F1 applied to the anode lead terminal 13 is absorbed by the first internal bent portion 1301 and the second internal bent portion 1302 due to the spring effect. As a result, the lateral displacement of the anode lead terminal 13 in the joining region R0 or the lateral displacement of the anode wire 2 together with the joining region R0 is suppressed.
  • the second internal bent portion 1302 is effective for the tensile force F2.
  • the second internal bent portion 1302 is opened and the bending angle ⁇ 2 is increased. That is, the second internal bent portion 1302 exerts a stress that pushes up the bent region R1 of the anode lead terminal 13 toward the second main surface 13Y. Since this stress works in a direction to cancel the tensile force F2, the stress applied to the anode lead terminal 13 is relaxed by the tensile force F2. Therefore, the displacement of the anode wire 2 due to the separation of the anode lead terminal 13 from the joint W or the anode wire 2 being pushed up together with the joint region R0 to the second main surface 13Y side is suppressed.
  • the second external bent portion 1312 further bends the anode lead terminal 13 bent by the first external bent portion 1311 along the outer shape of the outer package 11 and arranges it on the mounting surface 11 ⁇ / b> X of the outer package 11.
  • the anode lead terminal 13 is pulled toward the first main surface 13X side (tensile force F3) and pulled inward of the capacitor element 10 in the direction along the anode wire 2.
  • Force (tensile force F4) is applied.
  • the tensile force F3 is applied, as in the case of the tensile force F2, a stress that pushes up the second internal bent portion 1302 to the second main surface 13Y side works.
  • the stress applied to the anode lead terminal 13 is relieved by the tensile force F3.
  • the tensile force F4 is applied, a spring effect is generated as in the case of the tensile force F1. Therefore, the tensile force F4 applied to the anode lead terminal 13 is absorbed by the first internal bent portion 1301 and the second internal bent portion 1302.
  • the angle of bending of the anode lead terminal 13 by the first external bending portion 1311 is not particularly limited as long as the bending region R3 is along the surface of the exterior body 11.
  • the bending angle ⁇ 3 is, for example, 75 to 135 °, depending on the shape of the exterior body 11.
  • the bending angle ⁇ 3 is an angle formed by the first main surface 13X in the bending region R2 and the first main surface 13X in the bending region R3.
  • the bending angle (bending angle ⁇ 4) of the anode lead terminal 13 by the second external bending portion 1312 is not particularly limited as long as the bending region R3 is along the surface of the exterior body 11.
  • the bending angle ⁇ 4 is, for example, 75 to 135 °, depending on the shape of the exterior body 11.
  • the bending angle ⁇ 4 is an angle formed by the first main surface 13X in the bending region R3 and the first main surface 13X in the bending region R4.
  • the anode lead terminal 13 can be led out from an arbitrary position of the exterior body 11. That is, by adjusting the positions of the first internal bent portion 1301 and the second internal bent portion 1302, the anode lead terminal 13 can be moved from an arbitrary position of the outer package 11 without changing the position of the capacitor element 10 in the electrolytic capacitor 20. Can be derived.
  • the thickness of the exterior body covering the capacitor element may be different between the mounting surface side and the non-mounting surface side opposite thereto. In this case, there is a concern that a part of the capacitor element is exposed from the side having the smaller thickness of the exterior body. If the thickness of the exterior body is increased in order to avoid such exposure, the thickness of the electrolytic capacitor also increases, so that the requirement for a low profile cannot be satisfied.
  • the bent region R2 of the anode lead terminal 13 can be arranged on a plane including the anode wire 2 by the internal bent portion 130.
  • the anode wire 2 is usually disposed so as to pass through the center of the capacitor element 10. Therefore, when the capacitor element 10 is sealed, the position of the anode lead terminal 13 having the bent region R2 on the plane is led out of the exterior body 11 from the position where the thickness T of the electrolytic capacitor 20 is equally divided.
  • condenser element 10 to the exterior body 11 can be made equivalent in the mounting surface 11X side and the non-mounting surface 11Y side of the opposite side. Thereby, the external appearance of the obtained electrolytic capacitor 20 is also improved.
  • the thickness T is the maximum length of the electrolytic capacitor 20 in the thickness direction of the anode lead terminal 13 when viewed in a cross section perpendicular to the first main surface 13X and along the anode wire 2.
  • an upper mold and a lower mold are usually used. Sealing is performed while supporting the capacitor element 10 with the anode lead terminal 13 and the cathode lead terminal 14 sandwiched between these molds.
  • the internal bent portion 130 is formed so that the anode lead terminal 13 joined to the anode wire 2 is arranged on the same plane as the cathode lead terminal 14 drawn out from the joint portion with the cathode portion 7.
  • the capacitor element 10 before sealing is placed on a horizontal plane, if the height of the extracted anode lead terminal 13 and the cathode lead terminal 14 is different, the capacitor element 10 supported by them is inclined. It will be housed in the mold. For this reason, the capacitor element 10 may be exposed at a portion where the thickness of the exterior body 11 is small.
  • the cathode lead terminal 14 is electrically connected to the cathode portion 7.
  • the material of the cathode lead terminal 14 is not particularly limited as long as it is electrochemically and chemically stable and has conductivity, and may be a metal or a nonmetal.
  • the shape is not particularly limited, and for example, it is long and flat.
  • the thickness of the cathode lead terminal 14 is preferably 25 to 200 ⁇ m and more preferably 25 to 100 ⁇ m from the viewpoint of reducing the height.
  • the cathode lead terminal 14 is bonded to the cathode layer 5 via, for example, the conductive adhesive 8.
  • the presence or absence of a bent portion and the position of bonding with the cathode layer 5 are not particularly limited.
  • a part of the cathode lead terminal 14 is disposed on the mounting surface 11 ⁇ / b> X together with the anode lead terminal 13.
  • the other part of the cathode lead terminal 14 is preferably bonded to the cathode portion 7 (cathode layer 5) on the non-mounting surface 11Y side opposite to the mounting surface 11X. This is because the production of the electrolytic capacitor 20 is simplified. From these points, it is preferable that the cathode lead terminal 14 also includes an internal bent portion 140 and an external bent portion 141 (see FIG. 1), similarly to the anode lead terminal 13.
  • the cathode lead terminal 14 is bonded to the cathode layer 5 on the non-mounting surface 11Y side and includes the following internal bent portion 140.
  • the internal bent portion 140 is a first internal bent portion that bends the cathode lead terminal 14 extending from the junction with the cathode layer 5 toward the mounting surface 11X (to the first main surface 13X side of the anode lead terminal 13). 1402 and a second internal bent portion 1402 that bends the cathode lead terminal 14 bent by the first internal bent portion 1401 in a direction along the anode wire 2 and leads out from the outer package 11.
  • the cathode lead terminal 14 includes the following external bent portion 141.
  • the external bending portion 141 includes a first external bending portion 1411 that bends the cathode lead terminal 14 derived from the outer package 11 toward the mounting surface 11X (to the first main surface 13X side of the anode lead terminal 13), and a first external bending portion 1411.
  • the cathode lead terminal 14 bent by the external bent portion 1411 is bent along the outer shape of the exterior body 11 and provided with a second external bent portion 1412 disposed on the mounting surface 11X of the exterior body 11.
  • the internal bent portion 140 has an action of relaxing stress applied to the cathode lead terminal 14 when the two external bent portions 141 are formed. Thereby, joining of the cathode lead terminal 14 and the cathode layer 5 is maintained.
  • a bending part is not limited to this, You may provide the other bending part in the range which does not disturb the function of each bending part.
  • the outer package 11 is provided to electrically insulate the anode lead terminal 13 and the cathode lead terminal 14 from each other and is made of an insulating material.
  • the exterior body 11 contains the hardened
  • the thermosetting resin include epoxy resin, phenol resin, silicone resin, melamine resin, urea resin, alkyd resin, polyurethane, polyimide, unsaturated polyester, and the like.
  • the exterior body 11 accommodates, for example, the thermosetting resin and the capacitor element 10 to which the anode lead terminal 13 and the cathode lead terminal 14 are connected in a mold including an upper mold and a lower mold, and transfer molding. Formed by a method or a compression molding method. At this time, a part of the anode lead terminal 13 and the cathode lead terminal 14 is led out from the exterior body 11.
  • the electrolytic capacitor 20 includes, for example, a preparation step of preparing the capacitor element 10, the anode lead terminal 13 including the internal bent portion 130, and the cathode lead terminal 14 including the internal bent portion 140, and the anode disposed at a predetermined position.
  • Capacitor element 10 is mounted on lead terminal 13 and cathode lead terminal 14, and part of first main surface 13 ⁇ / b> X of anode lead terminal 13 is joined to anode wire 2, and part of cathode lead terminal 14 is a cathode part.
  • the derived anode lead terminal 13 and cathode lead terminal 14 are bent to form an external bent portion, and the anode lead terminal 13 and the cathode are A bending step of placing a portion of the mode pin 14 on the mounting surface 11X of the exterior body 11, by a method comprising, can be produced.
  • valve action metal particles and the anode wire 2 are placed in a mold so that the first portion 2a is embedded in the valve action metal particles, and after pressure forming, sintering is performed in a vacuum, so that the first portion 2a is porously sintered.
  • the anode part 6 embedded in the inside of one side of the bonded body is prepared.
  • the pressure during the pressure molding is not particularly limited, and is, for example, about 10 to 100N. If necessary, the valve action metal particles may be mixed with a binder such as polyacrylic carbonate.
  • the dielectric layer 3 is formed on the anode body 1.
  • the anode body 1 is immersed in a chemical conversion tank filled with an electrolytic aqueous solution (for example, phosphoric acid aqueous solution), and the second portion 2b of the anode wire 2 is connected to the anode body of the chemical conversion tank, thereby anodizing.
  • an electrolytic aqueous solution for example, phosphoric acid aqueous solution
  • the dielectric layer 3 made of an oxide film of the valve metal can be formed on the surface of the anode body 1.
  • the electrolytic aqueous solution is not limited to a phosphoric acid aqueous solution, and nitric acid, acetic acid, sulfuric acid, and the like can be used.
  • the solid electrolyte layer 4 is formed.
  • a process of forming the solid electrolyte layer 4 containing a conductive polymer will be described.
  • the solid electrolyte layer 4 containing a conductive polymer is, for example, a method of impregnating a monomer or oligomer into the anode body 1 on which the dielectric layer 3 is formed, and then polymerizing the monomer or oligomer by chemical polymerization or electrolytic polymerization.
  • the anode body 1 on which the dielectric layer 3 is formed is impregnated with a conductive polymer solution or dispersion and dried to form at least part of the dielectric layer 3.
  • the cathode layer 5 composed of the carbon layer 5a and the metal paste layer 5b is formed by sequentially applying a carbon paste and a metal paste on the surface of the solid electrolyte layer 4.
  • the configuration of the cathode layer 5 is not limited to this, and any configuration having a current collecting function may be used.
  • the capacitor element 10 is manufactured by the above method.
  • an anode lead terminal 13 and a cathode lead terminal 14 are prepared.
  • Internal bent portions (130, 140) are formed in the anode lead terminal 13 and the cathode lead terminal 14, respectively.
  • the internal bent portion is formed by, for example, pressing. What is necessary is just to set the position of the internal bending part 130 of the anode lead terminal 13 suitably according to the length, diameter, etc. of the anode wire 2.
  • the position of the internal bent portion 140 of the cathode lead terminal 14 may be appropriately set according to the shape and size of the capacitor element 10.
  • the anode lead terminal 13 and the cathode lead terminal 14 each having an internal bent portion are disposed at predetermined positions. At this time, the anode wire 2 is in contact with a part of the first main surface 13X of the anode lead terminal 13, and the first main surface 13X is on the mounting surface 11X of the exterior body 11 formed in a later step.
  • the anode lead terminal 13 is disposed so as to face each other.
  • the cathode lead terminal 14 is disposed so that the cathode lead terminal 14 contacts the cathode portion 7 (cathode layer 5) on the non-mounting surface 11Y side opposite to the mounting surface 11X.
  • the conductive adhesive 8 is applied to a predetermined position of the cathode layer 5.
  • Capacitor element 10 is mounted from the first main surface 13X side in a state where each lead terminal is arranged. Next, the second portion 2b of the anode wire 2 and the vicinity of one end 13T1 of the anode lead terminal 13 are joined by laser welding, resistance welding, or the like. At this time, the vicinity of one end of the cathode lead terminal 14 is bonded to the cathode layer 5 via the conductive adhesive 8.
  • the anode lead terminal 13 is joined to the non-mounting surface 11Y side of the anode wire 2 and the cathode lead terminal 14 is joined to the non-mounting surface 11Y side of the cathode portion 7. That is, since both the anode lead terminal 13 and the cathode lead terminal 14 are bonded to the non-mounting surface 11Y side of each member, the capacitor element 10 can be placed on each lead terminal in one step. The process is simplified.
  • the materials of the capacitor element 10 and the exterior body 11 are accommodated in a mold, and the capacitor element 10 is sealed by a transfer molding method, a compression molding method, or the like. Stop. At this time, a part of the anode lead terminal 13 and the cathode lead terminal 14 is exposed from the mold.
  • the molding conditions are not particularly limited, and the time and temperature conditions may be appropriately set in consideration of the curing temperature of the thermosetting resin used.
  • the electrolytic capacitor 20 is manufactured by the above method.
  • the electrolytic capacitor according to the present invention can be used for various applications because leakage current is reduced and connection reliability is excellent.
  • Electrolytic capacitor 10 Capacitor element 10Y: Opposing surface 1: Anode body 2: Anode wire 2a: First portion of anode wire 2b: Second portion of anode wire 3: Dielectric layer 4: Solid electrolyte layer 5: Cathode layer 5a : Carbon layer 5b: Metal paste layer 6: Anode portion 7: Cathode portion 11: Exterior body 11X: Mounting surface 11Y: Non-mounting surface 13: Anode lead terminal 13X: First main surface 13Y: Second main surface 13T1, 13T2: End portion 130: Internal bent portion 1301: First internal bent portion 1302: Second internal bent portion 131: External bent portion 1311: First external bent portion 1312: Second external bent portion 14: Cathode lead terminal 140: Internal bent portion 1401: First inner bent portion 1402: Second inner bent portion 141: External bent portion 1411: First outer bent portion 1412: Second outer bent portion 120: Electrolytic outlet Sensor 110: Capacitor element 102: Anode wire 111: Exterior body 113

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Abstract

L'invention concerne un condensateur électrolytique qui est équipé des éléments suivants : un élément de condensateur qui est pourvu d'une section d'anode et d'une section de cathode ; un fil d'anode ; et une borne de sortie d'anode ayant une première surface principale et une deuxième surface principale. La borne de sortie d'anode est pourvue d'une section de courbure intérieure à l'intérieur d'un boîtier extérieur, et d'une section de courbure extérieure à l'extérieur du boîtier extérieur. La section de courbure intérieure comporte : une première section de courbure intérieure, qui se courbe, à un emplacement où la borne de sortie d'anode n'est pas en contact avec le fil d'anode, la borne de sortie d'anode jusqu'au premier côté de surface principale, ladite borne de sortie d'anode s'étendant d'une section de liaison où la borne de sortie d'anode et le fil d'anode sont liés l'un à l'autre ; et une deuxième section de courbure intérieure, qui courbe la borne de sortie d'anode dans la direction le long du fil d'anode, ladite borne de sortie d'anode ayant été courbée par la première section de courbure intérieure, et qui fait sortir la borne de sortie d'anode du boîtier extérieur. La section de courbure extérieure comporte : une première section de courbure extérieure, qui courbe, vers le premier côté de surface principale, la borne de sortie d'anode sortant du boîtier extérieur ; et une deuxième section de courbure extérieure, qui courbe la borne de sortie d'anode le long de la forme extérieure du boîtier extérieur, ladite borne de sortie d'anode ayant été courbée par la première section de courbure extérieure, et qui dispose la borne de sortie d'anode sur la surface de montage du boîtier extérieur.
PCT/JP2018/006332 2017-02-28 2018-02-22 Condensateur électrolytique Ceased WO2018159426A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019502917A JPWO2018159426A1 (ja) 2017-02-28 2018-02-22 電解コンデンサ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017037290 2017-02-28
JP2017-037290 2017-02-28

Publications (1)

Publication Number Publication Date
WO2018159426A1 true WO2018159426A1 (fr) 2018-09-07

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PCT/JP2018/006332 Ceased WO2018159426A1 (fr) 2017-02-28 2018-02-22 Condensateur électrolytique

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Country Link
JP (1) JPWO2018159426A1 (fr)
WO (1) WO2018159426A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114981905A (zh) * 2020-01-28 2022-08-30 松下知识产权经营株式会社 电解电容器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10125558A (ja) * 1996-10-15 1998-05-15 Nitsuko Corp 導電性機能高分子膜を固体電解質とする固体コンデンサ
JP2004172527A (ja) * 2002-11-22 2004-06-17 Rohm Co Ltd 固体電解コンデンサ及びその製造方法
JP2006351999A (ja) * 2005-06-20 2006-12-28 Sanyo Electric Co Ltd 固体電解コンデンサ及びその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10125558A (ja) * 1996-10-15 1998-05-15 Nitsuko Corp 導電性機能高分子膜を固体電解質とする固体コンデンサ
JP2004172527A (ja) * 2002-11-22 2004-06-17 Rohm Co Ltd 固体電解コンデンサ及びその製造方法
JP2006351999A (ja) * 2005-06-20 2006-12-28 Sanyo Electric Co Ltd 固体電解コンデンサ及びその製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114981905A (zh) * 2020-01-28 2022-08-30 松下知识产权经营株式会社 电解电容器

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