WO2023162602A1 - コンデンサアセンブリ - Google Patents

コンデンサアセンブリ Download PDF

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Publication number
WO2023162602A1
WO2023162602A1 PCT/JP2023/003237 JP2023003237W WO2023162602A1 WO 2023162602 A1 WO2023162602 A1 WO 2023162602A1 JP 2023003237 W JP2023003237 W JP 2023003237W WO 2023162602 A1 WO2023162602 A1 WO 2023162602A1
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WO
WIPO (PCT)
Prior art keywords
anode
outer case
cathode
case
capacitor
Prior art date
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Ceased
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PCT/JP2023/003237
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English (en)
French (fr)
Japanese (ja)
Inventor
伸幸 山口
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Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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Priority to JP2024502949A priority Critical patent/JPWO2023162602A1/ja
Publication of WO2023162602A1 publication Critical patent/WO2023162602A1/ja
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
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/10—Housing; Encapsulation
    • 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
    • H01G9/06—Mounting in containers
    • 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
    • H01G9/08—Housing; Encapsulation

Definitions

  • the present invention relates to a capacitor assembly, and more particularly to the structure of an exterior case that houses a capacitor element within the capacitor assembly.
  • Electrolytic capacitors have a low equivalent series resistance (ESR) and excellent frequency characteristics, so they are installed in various electronic devices.
  • Patent Document 1 describes a capacitor assembly that includes an electrolytic capacitor and a ceramic housing that houses the electrolytic capacitor. With the electrolytic capacitor positioned within the ceramic housing, a lid is positioned over the ceramic housing and in the presence of a gaseous atmosphere containing an inert gas, the lid is welded and sealed to the sidewalls of the ceramic housing. A capacitor assembly is thus obtained.
  • Patent Document 1 in order to weld the lid to the side wall of the ceramic housing, it is necessary to make the side wall sufficiently thick. This limits the size of the electrolytic capacitors that can be accommodated within the ceramic housing. Also, space is required for electrically connecting the anode of the electrolytic capacitor to the anode terminal provided outside the ceramic housing, and there may be extra space in the housing that is not occupied by the electrolytic capacitor. As a result, the mounting size of the electrolytic capacitor is limited, and it is difficult to increase the capacity.
  • one aspect of the present disclosure includes a capacitor element, a first outer case, and a second outer case, wherein one of the first outer case and the second outer case is an anode of the capacitor element.
  • a cathode terminal electrically connected to a cathode portion is provided, and a bottomed cylindrical cathode outer case is opened at one end, wherein the open end of the first outer case and the open end of the second outer case.
  • the present invention relates to a capacitor assembly, wherein the anode outer case and the cathode outer case are integrally joined together to house the capacitor element.
  • the size of the capacitor element or electrolytic capacitor that can be stored in the exterior case can be increased, making it possible to easily realize a high-capacity electrolytic capacitor.
  • FIG. 1 is a cross-sectional view that schematically shows an example of a configuration of a capacitor assembly according to an embodiment of the present disclosure
  • FIG. 1A and 1B are side and bottom views schematically showing an example of a configuration of a capacitor assembly according to an embodiment of the present disclosure
  • FIG. 4 is a bottom view of the separated anode and cathode outer cases used in the capacitor assembly according to the embodiment of the present disclosure
  • FIG. 4 is a bottom view of another example of a capacitor assembly according to an embodiment of the present disclosure, with the anode and cathode outer cases separated
  • FIG. 4 is a bottom view of the separated anode and cathode outer cases, showing yet another example of a capacitor assembly according to an embodiment of the present disclosure
  • FIG. 4 is a bottom view of the separated anode and cathode outer cases, showing yet another example of a capacitor assembly according to an embodiment of the present disclosure
  • FIG. 4 is a bottom view of the separated anode and cathode outer cases, showing yet another example of a capacitor assembly according to an embodiment of the present disclosure
  • 1 is a top view of the interior of a capacitor assembly showing one embodiment of a capacitor assembly having multiple capacitor elements
  • FIG. 1 is a cross-sectional view of a capacitor assembly showing one embodiment of a capacitor assembly comprising an element stack in which multiple capacitor elements are stacked;
  • the present disclosure encompasses a combination of matters described in two or more claims arbitrarily selected from the multiple claims described in the attached claims. In other words, as long as there is no technical contradiction, the items described in two or more claims arbitrarily selected from the multiple claims described in the attached claims can be combined.
  • a capacitor assembly includes a capacitor element, a first outer case, and a second outer case.
  • One of the first outer case and the second outer case is a bottomed cylindrical anode outer case with one end open and provided with an anode terminal electrically connected to the anode portion of the capacitor element;
  • the other of the first outer case and the second outer case is a bottomed cylindrical cathode outer case with one end open and provided with a cathode terminal electrically connected to the cathode portion of the capacitor element.
  • the open end of the first outer case and the open end of the second outer case are joined, and the anode outer case and the cathode outer case are integrated to house the capacitor element.
  • the shape of the outer case in which the anode outer case and the cathode outer case are integrated is, for example, a substantially rectangular parallelepiped.
  • first outer case is the anode outer case and the second outer case is the cathode outer case.
  • present invention is not limited to this, and the first outer case may be the cathode outer case and the second outer case may be the anode outer case.
  • the joints are formed on the outer surfaces of the respective outer cases.
  • the dimensions are not affected, and the mounting dimensions of the capacitor element can be increased.
  • a first joint where the metal material is exposed is provided on the outer surface of the open end of the first exterior case.
  • the outer surface of the open end of the second exterior case may be provided with a second joint where the metal material is exposed.
  • Metal materials include, for example, solder, copper, gold, iron, nickel, iron-nickel alloys, and the like.
  • the metal material can be adhered, for example, to a base made of ceramic by a vapor phase method such as vapor deposition or a liquid phase method such as electroless plating.
  • the first joint and the second joint are joined by soldering or welding, for example.
  • the outer surface of the first exterior case at the first joint where the metal material is exposed is preferably flush with the outer surface of the second exterior case at the second joint where the metal material is exposed. Thereby, the first joint portion and the second joint portion can be easily joined.
  • the anode terminal may be provided on the bottom of the anode exterior case (either the first exterior case or the second exterior case).
  • the cathode terminal may be provided on the bottom of the cathode outer case (the other of the first outer case and the second outer case).
  • the anode terminal and the cathode terminal are arranged at positions facing each other with the cylindrical portion of the outer case interposed therebetween.
  • the structure for electrically connecting the capacitor element, the anode terminal and the cathode terminal can be made compact, and the dimension of the capacitor element can be maximized with respect to the exterior case.
  • the terminal arrangement is the same as that of a conventional chip-type capacitor, it is easy to mount on a printed circuit board.
  • the "bottom part" is a closed part on the opposite side of the opening of the bottomed cylindrical case.
  • the anode terminal faces the planted surface of the anode wire and is arranged on an extension line of the anode wire extending from the planted surface.
  • the cathode terminal may be arranged, for example, at a position facing the surface of the anode body opposite to the surface on which the anode wire is planted.
  • the second exterior case may be provided with a fitting portion that protrudes from the opening end toward the opening end side.
  • the fitting part is inserted inside the open end of the first outer case to fix the first outer case and the second outer case.
  • the first outer case and the second outer case can be temporarily fixed in an integrated state by the fitting portion, and by performing welding or the like in the temporarily fixed state, the first joint portion and the second joint portion easier to connect with.
  • the outer diameter of the fitting portion may be smaller than the outer diameter of the opening end of the first exterior case in order to facilitate the insertion of the fitting portion.
  • the outer surface of the fitting portion may be flush with the outer surface of the portion of the second exterior case excluding the joining portion and the fitting portion.
  • the outer diameter of the cylindrical portion of the second exterior case may be formed to be small at least in part on the open end side, and the portion of the cylindrical portion with the reduced outer diameter may be used as the fitting portion.
  • a protrusion may be provided on the inner surface of the opening end of the first exterior case in order to regulate the insertion position of the fitting portion that is inserted into the first exterior case. This facilitates positioning of the first exterior case and the second exterior case, and facilitates temporary fixing of the first exterior case and the second exterior case.
  • the first outer case and the second outer case may be filled with gas for the purpose of suppressing deterioration of the characteristics of the capacitor element.
  • the gas may be an inert gas. Nitrogen gas, argon gas, helium gas, etc. are mentioned as an inert gas.
  • a heat radiating member may be enclosed in the first exterior case and the second exterior case.
  • the heat-dissipating member has excellent thermal conductivity, quickly releases heat generated in the capacitor element (electrolytic capacitor), and has the effect of suppressing the temperature rise of the capacitor element (electrolytic capacitor).
  • the heat radiation member may be a heat radiation sheet. Materials for the heat-dissipating member or the heat-dissipating sheet include silicone rubber containing a thermally conductive filler.
  • the anode outer case and/or the cathode outer case may comprise a ceramic housing and a metal material fixed to a predetermined area on the surface of the housing.
  • the anode terminal and/or the cathode terminal may be formed of a metal material adhered to the outer surface of the anode outer case or the cathode outer case.
  • metal exposed regions in which the metal material is exposed may be formed on the inner surfaces of the anode outer case and/or the cathode outer case.
  • a metal exposed area on the inner surface of the anode outer case is electrically connected to the anode terminal, and electrical connection can be made between the anode part of the capacitor element and the anode terminal via the metal exposed area.
  • the metal exposed area on the inner surface of the cathode outer case can be electrically connected to the cathode terminal, and the cathode portion of the capacitor element can be electrically connected to the cathode terminal through the metal exposed area.
  • connection between the exposed metal area on the inner surface of each outer case and the anode terminal or cathode terminal on the outer surface is, for example, through the area where the anode terminal or the cathode terminal of the housing is provided, and the inner surface of the case. It may be electrically connected to the exposed metal material.
  • An anode outer case and a cathode outer case having holes (third joints) provided in the anode terminal or the cathode terminal are joined to the first joint and the second joint to form an integral outer case having a hole.
  • the capacitor element may be electrically connected to the anode terminal and the cathode terminal and the exterior case may be sealed by bonding the third bonding portion by laser, soldering, welding, or the like.
  • Either the anode outer case or the cathode outer case may be provided with a metal housing.
  • the other of the anode outer case and the cathode outer case comprises a ceramic housing and a metal material adhered to a predetermined area on the surface of the housing.
  • the metallic casing does not require formation of the first joint portion or the second joint portion, and can be manufactured at low cost.
  • the inner surface of the metal housing may be covered with an insulating material.
  • the capacitor assembly may include multiple capacitor elements. Each of the plurality of capacitor elements may be electrically connected in parallel with the anode terminal and the cathode terminal.
  • the capacitor assembly may comprise an element stack in which a plurality of capacitor elements are stacked.
  • FIG. 1A is a cross-sectional view schematically showing an example of a capacitor assembly according to this embodiment.
  • FIG. 1B is a bottom and side view of the capacitor assembly shown in FIG. 1A.
  • FIG. 1B(a) is a side view of main surface S3 in FIG. 1A.
  • FIG. 1B(b) is a bottom view of main surface S1 in FIG. 1A.
  • FIG. 1B(c) is a side view of main surface S4 in FIG. 1A.
  • the thickness of the exterior case is drawn thicker than it actually is for explanation.
  • FIG. 2 is a bottom view of anode outer case 40A and cathode outer case 40B in a state in which anode outer case 40A and cathode outer case 40B are separated before capacitor element 10 is accommodated, and shows surface S1 of FIG. 1A.
  • Fig. 3 shows a view from the side;
  • the capacitor assembly 100 includes a capacitor element 10, an anode outer case (first outer case) 40A, and a cathode outer case (second outer case) 40B.
  • the anode outer case 40A and the cathode outer case 40B are each a bottomed cylindrical outer case with one end open. The other ends of the anode outer case 40A and the cathode outer case 40B are closed by a bottom.
  • the anode exterior case 40A has a ceramic housing 41A, and a metal material 42A is fixed to a predetermined region of the housing 41A by vapor deposition using the housing 41A as a base layer.
  • the vapor-deposited metal material 42A forms an anode terminal 43A, a joint (first joint) 44A, and an exposed region 45A.
  • the cathode outer case 40B like the anode outer case 40A, has a ceramic housing 41B, and a metal material 42B is fixed to a predetermined region of the housing 41B by vapor deposition using the housing 41B as a base layer. .
  • the vapor-deposited metal material 42B forms a cathode terminal 43B, a joint (second joint) 44B, and an exposed region 45B.
  • the first joint portion 44A and the second joint portion 44B are provided on the outer surfaces of the open ends of the anode outer case 40A and the cathode outer case 40B, respectively.
  • the anode outer case 40A and the cathode outer case 40B are joined with the first joint portion 44A and the second joint portion 44B so that one of the open ends of each outer case is closed by the other, and the outer case is integrated as a whole. configure.
  • the anode outer case 40A and the cathode outer case 40B are integrated to house the capacitor element 10. As shown in FIG.
  • the outer surface of the anode outer case 40A at the first joint portion 44A is flush with the outer surface of the cathode outer case 40B at the second joint portion 44B, forming a flat joint surface. This facilitates bonding formation and increases bonding strength.
  • the positions of the first joint portion 44A and the second joint portion 44B may be positioned at the center of the integrated outer case. , the anode outer case 40A or the cathode outer case 40B.
  • the anode terminal 43A is provided on the outer surface of the bottom of the anode exterior case 40A.
  • An exposed region 45A is provided on the inner surface of the bottom of the anode outer case 40A located on the back surface of the anode terminal 43A.
  • a through hole 46A is provided in the housing 41A at the bottom of the anode exterior case 40A, and the through hole 46A is filled with a metal material. The exposed region 45A is electrically connected to the anode terminal 43A through the through hole 46A.
  • the exposed region 45A is electrically connected to the anode portion 6 of the capacitor element. Thereby, the anode terminal 43A is electrically connected to the anode portion 6 .
  • a cathode terminal 43B is provided on the outer surface of the bottom of the cathode exterior case 40B.
  • An exposed area 45B is provided on the inner surface of the bottom of the cathode outer case 40B located on the back surface of the cathode terminal 43B.
  • a through hole 46B is provided in the housing 41B at the bottom of the cathode outer case 40B, and the through hole 46B is filled with a metal material. The exposed region 45B is electrically connected to the cathode terminal 43B through the through hole 46B.
  • the exposed region 45B is electrically connected to the cathode portion 7 of the capacitor element.
  • the cathode terminal 43B is electrically connected to the cathode section 7. As shown in FIG.
  • the rear surface of the first joint portion 44A and/or the second joint portion 44B is also provided with an exposed region in which a metal material is fixed using the housing as a base layer, and the first joint portion 44A and the second joint portion 44B are electrically connected to each other. may be connected to In this case, the first joint portion 44A and the second joint portion 44B function as anode terminals or cathode terminals (for example, cathode terminals).
  • One of the anode exterior case 40A and the cathode exterior case 40B is an exterior case in which a metal material is fixed to a predetermined region of a ceramic housing by vapor deposition, and the other is a bottomed metal cylindrical case. good too.
  • a specific gas may be filled in the exterior case in which the anode exterior case 40A is integrated with the cathode exterior case 40B.
  • the gas may be, for example, an inert gas.
  • a heat-dissipating member (for example, a heat-dissipating sheet) may be enclosed in the integrated exterior case.
  • the capacitor element 10 has an anode portion 6 and a cathode portion 7 .
  • Anode portion 6 is electrically connected to anode terminal 43A
  • cathode portion 7 is electrically connected to cathode terminal 43B, thereby realizing capacitor assembly 100 .
  • the anode section 6 has the anode body 1 and the anode wire 2
  • the implanted portion 2b of the anode wire 2 from the anode body 1 is joined to the exposed region 45A to form the anode wire 2
  • An electrical connection is made between the anode portion 6 and the anode terminal 43A through the .
  • Anode body 1 is a porous sintered body of a valve metal, and dielectric layer 3 is formed on the surface of anode body 1 .
  • Cathode portion 7 has solid electrolyte layer 4 covering at least part of dielectric layer 3 and cathode layer 5 covering at least part of the surface of solid electrolyte layer 4 .
  • the cathode layer 5 is adhered and fixed to the exposed region 45A via the conductive adhesive 8, and the cathode section 7 and the cathode terminal 43B are electrically connected.
  • a hole may be provided in the bottom of the anode outer case 40A and the third joint 53 may be formed in the hole in order to facilitate welding.
  • the configuration of the capacitor element is not limited to this, and for example, a valve metal foil may be used as the anode body 1 .
  • At least a partial region of the valve metal foil may be roughened, for example by etching, and the dielectric layer 3 may be formed on the surface of the roughened region.
  • At least part of the dielectric layer 3 is covered with a cathode portion 7 .
  • a partial region of the surface of the valve metal foil is not covered with the cathode portion 7, and the portion of the anode body 1 not covered with the cathode portion 7 is adhered and fixed to the exposed region 45A via a conductive adhesive.
  • electrical connection can be established between the anode portion 6 and the anode terminal 43A.
  • As the anode body 1 a laminate of foils of a valve-acting metal in which the cathode portion 7 is formed may be used.
  • FIG. 3 shows another embodiment of the anode outer case 40A and the cathode outer case 40B.
  • FIG. 3 is a bottom view of a state in which the anode outer case 40A1 and the cathode outer case 40B1 are separated.
  • One of the anode outer case 40A1 and the cathode outer case 40B1 (here, the cathode outer case 40B1) is provided with a fitting portion 47 projecting from the open end of the outer case toward the open end side.
  • the fitting portion 47 protrudes toward the opening end side from the joint portion (here, the second joint portion 44B) on the opening end side.
  • the fitting portion 47 is inserted inside the open end of the other of the anode outer case 40A1 and the cathode outer case 40B1 (here, the cathode outer case 40B1). By inserting the fitting portion 47, the anode outer case 40A1 and the cathode outer case 40B1 are temporarily fixed in an integrated state. Since it can be joined to the first joint portion 44A and the second joint portion 44B in a temporarily fixed state, the first joint portion and the second joint portion can be easily joined.
  • the fitting portion 47 is inserted inside the cathode outer case 40B1 until the first joint portion 44A and the second joint portion 44B are adjacent to or overlap each other.
  • fitting portion 47 As shown in FIG. It may be formed smaller than the outer diameter of the open end of the anode exterior case 40A1).
  • FIG. 4 shows still another embodiment of the anode outer case 40A and the cathode outer case 40B.
  • FIG. 4 is a bottom view of a state in which the anode outer case 40A2 and the cathode outer case 40B2 are separated.
  • a projection 48 protruding toward the inside of the cylinder is provided on the inner surface of the open end of the anode outer case 40A2 into which the fitting portion 47 is inserted.
  • Other configurations are the same as those of anode exterior case 40A1 and cathode exterior case 40B1 shown in FIG.
  • the protrusion 48 is, for example, a recess formed in a predetermined area of the housing of the anode exterior case 40A2 and protruding toward the inside of the cylinder.
  • the protrusion 48 regulates the insertion position when the fitting portion 47 of the cathode outer case 40B2 is inserted into the opening end of the anode outer case 40A2, thereby facilitating the positioning of the cathode outer case 40B2 with respect to the anode outer case 40A2.
  • FIG. 5 shows still another embodiment of the anode outer case 40A and the cathode outer case 40B.
  • FIG. 5 is a bottom view of the state in which the anode outer case 40A3 and the cathode outer case 40B3 are separated.
  • the outer diameter of the cylindrical portion of one of the anode outer case 40A3 and the cathode outer case 40B3 (here, the cathode outer case 40B3 in which the fitting portion 47 is provided) is It may be smaller than the outer diameter of the cylindrical portion of the inserted anode outer case 40A3).
  • the outer surface of the fitting portion 47 is flush with the outer surface of the cylindrical portion of the cathode exterior case 40B3 in the portion (for example, the exposed portion of the housing 41B) excluding the second joint portion 44B and the fitting portion 47. good too.
  • the fitting portion 47 is provided in the cathode outer cases 40B1 to 40B3.
  • a projection 48 is also provided on the anode exterior case 40A2.
  • the present invention is not limited to this, and the fitting portion 47 may be provided on the anode outer case and the protrusion 48 may be provided on the cathode outer case.
  • FIG. 6 shows still another embodiment of the anode outer case 40A and the cathode outer case 40B.
  • FIG. 6 is a bottom view of a state in which the anode outer case 40A4 and the cathode outer case 40B4 are separated.
  • the anode exterior case 40A4 is a bottomed cylindrical metal case having an opening, and the entire surface of the metal case can constitute the anode terminal 43A. The end of the metal case on the opening side forms the first joint 44A.
  • the cathode outer case 40B4 is an outer case formed by vapor-depositing a metal material on a predetermined region of the ceramic housing 41B to form a cathode terminal 43B and a second joint 44B.
  • a plurality of capacitor elements may be housed in the capacitor assembly.
  • a plurality of capacitor elements may be mounted on a substrate, for example, each anode portion electrically connected to an anode terminal, and each cathode portion electrically connected to a cathode terminal.
  • a plurality of capacitor elements may be stacked such that their respective cathode portions overlap each other to form an element laminate.
  • FIG. 7 shows an example of a capacitor assembly 101 in which eight capacitor elements 10a-10h are mounted on a substrate.
  • FIG. 7 is a top view of the inside of the capacitor assembly (viewed from the main surface S2 side of FIG. 1A).
  • Wiring layers are formed on the surface of the substrate 50 facing the capacitor elements 10a to 10h and the surface on the opposite side thereof, and the wiring layers on both surfaces are electrically connected through through holes.
  • Each of the anode portions of capacitor elements 10a to 10h is electrically connected to anode terminal 43A via connecting member 51A and conductive adhesive 8 provided at the end of substrate 50 on the side of anode exterior case 40A. .
  • Each of the cathode portions of the capacitor elements 10a to 10e is electrically connected to the cathode terminal 43B via the connection member 51B and the conductive adhesive 8 provided at the end of the substrate 50 on the cathode outer case 40B side, A capacitor assembly 101 is constructed.
  • a structure in which a plurality of substrates are used and the substrates are stacked in a plurality of stages may be employed.
  • FIG. 8 is a cross-sectional view showing an example of a capacitor assembly 102 comprising an element stack in which five capacitor elements 10a-10e are stacked.
  • the anode portions of the five stacked capacitor elements 10a to 10e are bundled on the side of the anode outer case 40A and electrically connected to the anode terminal 43A via the connecting member 52.
  • the cathode portions of the capacitor elements 10a to 10e are bundled on the side of the cathode outer case 40B and electrically connected to the cathode terminal 43B via a connection member.
  • the capacitor element 10 will be described in detail, taking as an example a case in which a solid electrolyte layer is provided as the electrolyte.
  • Anode section 6 has anode body 1 and anode wire 2 extending from one surface of anode body 1 and electrically connected to an anode terminal.
  • Anode body 1 is, for example, a cuboid porous sintered body obtained by sintering metal particles.
  • the metal particles particles of valve action metals such as titanium (Ti), tantalum (Ta) and niobium (Nb) are used.
  • One or two or more kinds of metal particles are used in anode body 1 .
  • the metal particles may be an alloy 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 action metal and a typical element such as nitrogen may also be used.
  • the alloy of the valve action metal contains the valve action metal as a main component, and contains, for example, 50 atomic % or more of the valve action metal.
  • the anode wire 2 is made of a conductive material.
  • the material of the anode wire 2 is not particularly limited, and examples thereof include the above-described valve action metals, copper, aluminum, aluminum alloys, and the like.
  • the materials constituting anode body 1 and anode wire 2 may be of the same type or of different types.
  • Anode wire 2 has a first portion 2 a embedded inside anode body 1 from one surface of anode body 1 and a second portion 2 b extending from the one surface of anode body 1 .
  • the cross-sectional shape of the anode wire 2 is not particularly limited, and may be circular, track-shaped (a shape consisting of mutually parallel straight lines and two curved lines connecting the ends of these straight lines), elliptical, rectangular, polygonal, and the like. be done.
  • the anode portion 6 is produced, for example, by embedding the first portion 2a in the powder of the first metal particles, molding the first portion 2a into a rectangular parallelepiped shape, and sintering the first portion. As a result, the second portion 2b of the anode wire 2 is pulled out from one surface of the anode body 1 so as to be erected. The second portion 2b is joined to the exposed region 45A of the anode outer case 40A by welding or the like, so that the anode wire 2 and the anode terminal 13 are electrically connected.
  • the welding method is not particularly limited, and includes resistance welding, laser welding, and the like.
  • a dielectric layer 3 is formed on the surface of the anode body 1 .
  • the dielectric layer 3 is made of metal oxide, for example.
  • a method for forming a layer containing a metal oxide on the surface of anode body 1 for example, anode body 1 is immersed in a chemical solution to anodize the surface of anode body 1, or anode body 1 is immersed in oxygen.
  • the dielectric layer 3 is not limited to the layer containing the above-mentioned metal oxide, and may have insulating properties.
  • the cathode section 7 has a solid electrolyte layer 4 and a cathode layer 5 covering the solid electrolyte layer 4 .
  • Solid electrolyte layer 4 is formed to cover at least a portion of dielectric layer 3 .
  • a manganese compound or a conductive polymer is used for the solid electrolyte layer 4 .
  • conductive polymers include polypyrrole, polythiophene, polyfuran, polyaniline, polyacetylene, and the like. These may be used alone, or may be used in combination. Also, the conductive polymer may be a copolymer of two or more monomers. Polythiophene, polyaniline, and polypyrrole may be used from the viewpoint of excellent conductivity. In particular, polypyrrole may be used because of its excellent water repellency.
  • the solid electrolyte layer 4 containing the conductive polymer may be composed of two or more solid electrolyte layers.
  • the solid electrolyte layer 4 may include a first conductive polymer layer covering the dielectric layer 3 and a second conductive polymer layer covering the first conductive polymer layer.
  • the composition and formation method (polymerization method) of the conductive polymer used for each layer may be different.
  • the first conductive polymer layer may be formed by polymerizing raw material monomers on the dielectric layer 3 .
  • the second conductive polymer layer may be formed by applying a liquid containing the conductive polymer to the dielectric layer 3 .
  • polypyrrole, polythiophene, polyfuran, polyaniline, etc. mean polymers having polypyrrole, polythiophene, polyfuran, polyaniline, etc. as a basic skeleton, respectively. Therefore, polypyrrole, polythiophene, polyfuran, polyaniline, etc. may also include their respective derivatives.
  • polythiophenes include poly(3,4-ethylenedioxythiophene) and the like.
  • dopants may be added to the polymerization liquid, solution or dispersion of the conductive polymer for forming the conductive polymer, in order to improve the conductivity of the conductive polymer.
  • the dopant is not particularly limited, examples include naphthalenesulfonic acid, p-toluenesulfonic acid, polystyrenesulfonic acid and the like.
  • the average particle diameter D50 of the particles is, for example, 0.01 ⁇ m or more and 0.5 ⁇ m or less. If the average particle diameter D50 of the particles is within this range, the particles can easily penetrate into the interior of anode body 1 .
  • the cathode layer 5 has, for example, a carbon layer 5a formed 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 contains a conductive carbon material such as graphite and a resin.
  • the metal paste layer 5b contains, for example, metal particles (for example, silver) and resin.
  • the structure of the cathode layer 5 is not limited to this structure.
  • the configuration of the cathode layer 5 may be any configuration as long as it has a current collecting function.
  • the present invention can be used for electrolytic capacitors, preferably for electrolytic capacitors using a porous body as an anode body.
  • capacitor assembly 10a to 10h capacitor element 1: anode body 2: anode wire 2a: first part 2b: second part 3: dielectric layer 4: solid electrolyte layer 5: cathode layer 5a: carbon layer 5b : Metal paste layer 6: Anode part 7: Cathode part 8: Conductive adhesive 40A, 40A1 to 40A3: Anode outer case 41A: Housing 42A: Metal material 43A: Anode terminal 44A: Joint (first joint) 45A: Exposed area 46A: Through hole 40B, 40B1 to 40B4: Cathode outer case 41B: Housing 42B: Metal material 43B: Cathode terminal 44B: Joint (second joint) 45B: exposed region 46B: through hole 47: fitting portion 48: protrusion 50: substrate 51A, 51B, 52: connection member 53: hole (third joint)

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
PCT/JP2023/003237 2022-02-25 2023-02-01 コンデンサアセンブリ Ceased WO2023162602A1 (ja)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005317461A (ja) * 2004-04-30 2005-11-10 Sanyo Electric Co Ltd パック電池
JP2006196498A (ja) * 2005-01-11 2006-07-27 Matsushita Electric Ind Co Ltd 固体電解コンデンサ及びその製造方法
JP2013021162A (ja) * 2011-07-12 2013-01-31 Taiyo Yuden Co Ltd 電気化学デバイス
JP2013191805A (ja) * 2012-03-15 2013-09-26 Kojima Press Industry Co Ltd 樹脂モールド型コンデンサ
JP2018032677A (ja) * 2016-08-23 2018-03-01 パナソニックＩｐマネジメント株式会社 コンデンサ
JP2021158162A (ja) * 2020-03-25 2021-10-07 パナソニックＩｐマネジメント株式会社 コンデンサ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005317461A (ja) * 2004-04-30 2005-11-10 Sanyo Electric Co Ltd パック電池
JP2006196498A (ja) * 2005-01-11 2006-07-27 Matsushita Electric Ind Co Ltd 固体電解コンデンサ及びその製造方法
JP2013021162A (ja) * 2011-07-12 2013-01-31 Taiyo Yuden Co Ltd 電気化学デバイス
JP2013191805A (ja) * 2012-03-15 2013-09-26 Kojima Press Industry Co Ltd 樹脂モールド型コンデンサ
JP2018032677A (ja) * 2016-08-23 2018-03-01 パナソニックＩｐマネジメント株式会社 コンデンサ
JP2021158162A (ja) * 2020-03-25 2021-10-07 パナソニックＩｐマネジメント株式会社 コンデンサ

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