WO2020022471A1 - 電解コンデンサ - Google Patents
電解コンデンサ Download PDFInfo
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- WO2020022471A1 WO2020022471A1 PCT/JP2019/029373 JP2019029373W WO2020022471A1 WO 2020022471 A1 WO2020022471 A1 WO 2020022471A1 JP 2019029373 W JP2019029373 W JP 2019029373W WO 2020022471 A1 WO2020022471 A1 WO 2020022471A1
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- Prior art keywords
- acid
- electrolytic capacitor
- solvent
- dielectric layer
- solid electrolyte
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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
- H01G9/15—Solid electrolytic capacitors
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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
- H01G9/022—Electrolytes; Absorbents
- H01G9/035—Liquid electrolytes, e.g. impregnating materials
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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
- H01G9/15—Solid electrolytic capacitors
- H01G9/151—Solid electrolytic capacitors with wound foil electrodes
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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
- H01G9/145—Liquid electrolytic capacitors
Definitions
- the present disclosure generally relates to an electrolytic capacitor, and more particularly, to an electrolytic capacitor including an anode body, a cathode body, a solid electrolyte, and a liquid component.
- Electrolytic capacitors that are small, have large capacitance, and low equivalent series resistance (ESR) are promising.
- Patent Literature 1 discloses a solid electrolyte using a conductive polymer dispersion in which conductive polymer particles are dispersed in a solvent for a capacitor element in which an anode electrode foil and a cathode electrode foil are wound via a separator.
- a layered solid electrolytic capacitor is described.
- an electrolyte solution containing a salt of a composite compound of an inorganic acid and an organic acid as a solute is filled in a void portion in the capacitor element.
- the complex acid compound is easily dissolved in a glycol-based solvent, but is hardly dissolved in other solvents.
- a complex acid compound is dissolved in a solvent by using ethylene glycol as a solvent.
- the freezing point of the solvent cannot be said to be sufficiently low, and it is difficult to use the electrolytic capacitor at a low temperature.
- An object of the present disclosure is to provide an electrolytic capacitor that can be used at various temperatures.
- the electrolytic capacitor according to one embodiment of the present disclosure includes an anode body, a cathode body, a solid electrolyte, and a liquid component.
- the anode body has a dielectric layer formed on the surface.
- the solid electrolyte is in contact with the dielectric layer and is interposed between the anode body and the cathode body.
- the liquid component contacts the dielectric layer and the solid electrolyte and includes a solvent and an acid component.
- the acid component includes a complex acid compound of an inorganic acid and an organic acid.
- the solvent includes a polyol having two or more hydroxyl groups and a polyalkylene glycol having a repeating unit having three or more carbon atoms.
- An electrolytic capacitor includes an anode body, a cathode body, a solid electrolyte, and a liquid component.
- the anode body has a dielectric layer formed on the surface.
- the solid electrolyte is in contact with the dielectric layer and is interposed between the anode body and the cathode body.
- the liquid component contacts the dielectric layer and the solid electrolyte and includes a solvent and an acid component.
- the acid component includes a complex acid compound of an inorganic acid and an organic acid.
- the solvent includes a polyol having two or more hydroxyl groups and a polyalkylene glycol. The weight of the polyalkylene glycol is greater than the weight of the polyol.
- FIG. 1 is a schematic cross-sectional view of an electrolytic capacitor according to an embodiment of the present disclosure.
- FIG. 2 is a schematic perspective view in which a capacitor element included in the electrolytic capacitor is partially developed.
- FIG. 3 is a schematic enlarged view showing a state in which a solid electrolyte is formed between an anode body and a cathode body in the capacitor element of the above.
- the electrolytic capacitor 1 includes an anode body 21, a cathode body 22, a solid electrolyte 25, and a liquid component 26, as shown in FIGS.
- the anode body 21 has a dielectric layer 210 formed on the surface.
- the solid electrolyte 25 is in contact with the dielectric layer 210 and is interposed between the anode body 21 and the cathode body 22.
- the liquid component 26 comes into contact with the dielectric layer 210 and the solid electrolyte 25 and includes a solvent and an acid component.
- the acid component includes a complex acid compound of an inorganic acid and an organic acid.
- the solvent contains a system polyol containing two or more hydroxyl groups and a polyalkylene glycol having a repeating unit having 3 or more carbon atoms.
- the solvent includes a polyol having two or more hydroxyl groups and a polyalkylene glycol, and the weight of the polyalkylene glycol is larger than the weight of the polyol.
- the complex acid compound can be dissolved in the solvent when the solvent contains a polyol having two or more hydroxyl groups and a polyalkylene glycol.
- the solvent contains a polyalkylene glycol having 3 or more carbon atoms in the repeating unit, the freezing point of the solvent can be lowered.
- the electrolytic capacitor 1 can be easily used even at a low temperature, and the electrolytic capacitor 1 can be used at various temperatures.
- the electrolytic capacitor 1 includes a capacitor element 10, a bottomed case 11 (hereinafter, also referred to as case 11), a sealing member 12, a seat plate 13, lead wires 14A and 14B, and a lead tab. 15A and 15B.
- the case 11 is configured to be able to accommodate the capacitor element 10.
- the case 11 is a cylindrical member, and the bottom is not open but the top is open. Therefore, the capacitor element 10 can be inserted into the case 11 from the opening of the case 11.
- the case 11 is made of, for example, one or more materials selected from the group consisting of aluminum, stainless steel, copper, iron, brass, and alloys thereof.
- the opening of the case 11 is closed by the sealing member 12.
- the sealing member 12 is made of a rubber material such as EPT (ethylene-propylene terpolymer), IIR (isobutylene-isoprenerubber), or a resin material such as epoxy resin.
- the sealing member 12 has a pair of through holes.
- the case 11 is drawn inward in the vicinity of its open end, and the open end is curled, whereby the sealing member 12 is swaged. Further, the sealing member 12 is covered with a seat plate 13.
- the seat plate 13 is made of, for example, an insulating resin material.
- Lead Wire and Lead Tab A pair of lead wire 14A and lead wire 14B are drawn out of the through hole of the sealing member 12 and penetrate the seat plate 13. The pair of lead tabs 15A and 15B are embedded in the sealing member 12. The lead tab 15A electrically connects the lead wire 14A and the electrode of the capacitor element 10. The lead tab 15B electrically connects the lead wire 14B and the electrode of the capacitor element 10.
- the capacitor element 10 of the present embodiment is a wound body as shown in FIG.
- the wound body shown in FIG. 2 shows a state where the capacitor element 10 is taken out from the electrolytic capacitor 1 shown in FIG. 1 and partially expanded.
- the capacitor element 10 includes an anode body 21, a cathode body 22, and a separator 23. As shown in FIG. 2, the lead tab 15A is electrically connected to the anode body 21, and the lead tab 15B is electrically connected to the cathode body 22. Therefore, the anode body 21 is electrically connected to the lead wire 14A via the lead tab 15A, and the cathode body 22 is electrically connected to the lead wire 14B via the lead tab 15B.
- the separator 23 is interposed between the anode body 21 and the cathode body 22.
- the anode body 21, the cathode body 22, and the separator 23 are wound in this state.
- the separator 23 is a nonwoven fabric containing, for example, cellulose, kraft, polyethylene terephthalate, polyphenylene sulfide, nylon, aromatic polyamide, polyimide, polyamide imide, polyether imide, rayon, glass, vinylon or aramid fiber.
- the outermost periphery of the capacitor element 10 is fixed by being fixed with a winding tape 24.
- FIG. 3 is a schematic enlarged view showing this state. As shown in FIG. 3, the separator 23 holds a solid electrolyte 25.
- the anode body 21 includes a metal foil and a dielectric layer 210 formed on the surface of the metal foil.
- the surface of the metal foil is roughened. Thereby, the surface area of the metal foil can be increased, and the area of the dielectric layer 210 formed on the surface of the metal foil can also be increased.
- the method for roughening is not particularly limited, and for example, an etching method can be employed.
- the material of the metal foil is not particularly limited.
- the metal foil is a valve metal such as aluminum, tantalum, niobium or titanium, or an alloy containing the valve metal.
- the dielectric layer 210 is formed by subjecting the surface of the metal foil to a chemical conversion treatment.
- a chemical conversion treatment By this chemical conversion treatment, an oxide film is formed on the surface of the metal foil, and this oxide film becomes the dielectric layer 210.
- a method of applying a voltage to the metal foil in a state where the metal foil is immersed in the treatment liquid can be employed.
- the treatment liquid is not particularly limited, but for example, an ammonium adipate solution can be used.
- Cathode body 22 As the cathode body 22, a metal foil similar to the metal foil used in manufacturing the anode body 21 can be used. Cathode body 22 may have a roughened surface. The cathode body 22 may have a layer containing, for example, titanium or carbon formed on the surface thereof.
- the solid electrolyte 25 is in contact with the dielectric layer 210 and is interposed between the anode body 21 and the cathode body 22.
- the solid electrolyte 25 is porous having fine voids inside.
- the solid electrolyte 25 impregnates the capacitor element 10 with a volatile liquid component and a polymer dispersion containing the conductive polymer 250 dispersed in the volatile liquid component, and volatilizes the volatile liquid component from the capacitor element 10. And can be formed. In this case, the withstand voltage characteristics of the electrolytic capacitor 1 can be improved.
- the solid electrolyte 25 preferably includes the conductive polymer 250.
- the conductive polymer 250 is attached to at least a part of the surface of the dielectric layer 210.
- the conductive polymer 250 is attached to the separator 23.
- the volatile liquid component for example, water, a non-aqueous solvent, or a mixture of water and a non-aqueous solvent can be used.
- a protic solvent or an aprotic solvent can be used.
- the protic solvent may include, for example, one or more selected from the group consisting of alcohols and ethers.
- the alcohol can include, for example, one or more selected from the group consisting of methanol, ethanol, propanol, butanol, ethylene glycol, and propylene glycol.
- the ethers can include, for example, one or more selected from the group consisting of formaldehyde and 1,4-dioxane.
- the aprotic solvent can include, for example, one or more selected from the group consisting of amides, esters, and ketones.
- the amide may include, for example, one or more selected from the group consisting of N-methylacetamide, N, N-dimethylformamide, and N-methyl-2-pyrrolidone.
- Esters can include, for example, methyl acetate.
- Ketones can include, for example, methyl ethyl ketone.
- the conductive polymer 250 preferably includes, for example, one or more components selected from the group consisting of polypyrrole, polythiophene, polyaniline, and derivatives thereof.
- derivatives of polythiophene include poly (3,4-ethylenedioxythiophene) (PEDOT) and the like.
- the conductive polymer 250 may include a homopolymer or a copolymer.
- the weight average molecular weight of the conductive polymer 250 is not particularly limited, but is, for example, 1,000 to 100,000.
- the conductive polymer 250 incorporates a dopant. With this dopant, the conductive polymer 250 can exhibit conductivity.
- the dopant is not particularly limited, but can include, for example, a component having a sulfonic acid group, and includes one or more components selected from the group consisting of aliphatic sulfonic acids, aromatic sulfonic acids, and polymer sulfonic acids. be able to.
- the dopant preferably contains a polymer sulfonic acid.
- the dopant is less likely to be separated from the conductive polymer 250 than in the case where a monomolecular acid component is contained as the dopant, and is particularly difficult to be separated from the conductive polymer 250 even at a high temperature.
- Polymer sulfonic acids include, for example, polyvinyl sulfonic acid, polystyrene sulfonic acid, polyallyl sulfonic acid, polyacryl sulfonic acid, polymethacryl sulfonic acid, poly (2-acrylamido-2-methylpropane sulfonic acid), and polyisoprene sulfonic acid At least one selected from the group consisting of: It is particularly preferred that the dopant comprises polystyrene sulfonic acid.
- the conductive polymer 250 is considered to be in a state of being dispersed and bonded to the side chain of polystyrene sulfonic acid in an island shape. For this reason, the dopant does not easily separate from the conductive polymer 250, and particularly, the dopant does not easily separate from the conductive polymer 250 even at a high temperature.
- the liquid component 26 is impregnated in the capacitor element 10, and specifically, the liquid component enters the plurality of voids of the solid electrolyte 25. Thus, the liquid component 26 is in contact with the dielectric layer 210 and the solid electrolyte 25.
- the liquid component 26 may function as an electrolytic solution in the electrolytic capacitor 1.
- the liquid component 26 includes a solvent and an acid component.
- defects in the dielectric layer 210 can be repaired. Specifically, in the dielectric layer 210, a portion where the metal foil of the anode body 21 is exposed can be oxidized to form the dielectric layer 210.
- the acid component of the present embodiment includes a complex acid compound of an organic acid and an inorganic acid.
- Organic acids include, for example, phthalic acid, isophthalic acid, terephthalic acid, maleic acid, adipic acid, benzoic acid, toluic acid, enanthic acid, malonic acid, 1,6-decanedicarboxylic acid, 1,7-octanedicarboxylic acid, azelaine It may contain at least one selected from the group consisting of acids, salicylic acid, oxalic acid, and glycolic acid.
- the inorganic acid can include, for example, one or more selected from the group consisting of boric acid, phosphoric acid, phosphorous acid, hypophosphorous acid, phosphate ester, carbonic acid, and silicic acid.
- the complex acid compound preferably contains at least one selected from the group consisting of borodisalicylic acid, borodiglycolic acid, and borodisoxalic acid.
- the electrolytic capacitor 1 When the electrolytic capacitor 1 is used in a state where high frequency is applied to the electrolytic capacitor 1, the electrolytic capacitor 1 may generate heat. Since the composite acid compound has excellent thermal stability, the composite acid compound is unlikely to undergo a chemical change even when heat is generated in the electrolytic capacitor 1. This is because in the composite oxide, the organic acid and the inorganic acid form a strong complex bond. For example, when the complex acid compound is borodisalicylic acid, a strong hydroxyl group and a carboxyl group of salicylic acid and two hydroxyl groups of boric acid can form a strong complex bond. Further, since the complex acid compound has a high acidity, the pH of the liquid component 26 can be lowered even in a neutralized salt state. Therefore, when the acid component contains the complex acid compound, the undoping phenomenon in which the dopant is separated from the conductive polymer 250 can be suppressed.
- the complex acid compound may be in the form of a salt.
- the salt of the composite oxide compound may be, for example, in one or more states selected from the group consisting of ammonium salts, quaternary ammonium salts, quaternized amidinium salts, and amine salts.
- the acid component may contain components other than the above-mentioned complex acid compound.
- the acid component preferably contains, for example, an organic acid.
- Organic acids include, for example, phthalic acid, isophthalic acid, terephthalic acid, maleic acid, adipic acid, benzoic acid, toluic acid, enanthic acid, malonic acid, 1,6-decanedicarboxylic acid, 1,7-octanedicarboxylic acid, azelaine It may contain at least one selected from the group consisting of acids, salicylic acid, oxalic acid, and glycolic acid.
- the acid component may include, for example, an inorganic acid.
- the inorganic acid can include, for example, one or more selected from the group consisting of boric acid, phosphoric acid, phosphorous acid, hypophosphorous acid, borate ester, phosphate ester, carbonic acid, and silicic acid.
- the acid component contains, for example, a complex acid compound of the organic acid and the inorganic acid. Therefore, the complex acid compound preferably contains at least one selected from the group consisting of borodisalicylic acid, borodiglycolic acid, and borodisoxalic acid.
- the acid component may include, for example, a polymer acid component.
- the polymer acid component includes, for example, polyacrylic acid, polymethacrylic acid, polyvinyl sulfonic acid, polystyrene sulfonic acid, polyallyl sulfonic acid, polyacryl sulfonic acid, polymethacryl sulfonic acid, poly (2-acrylamido-2-methylpropane sulfone) Acid) and polyisoprenesulfonic acid.
- the acid component contains the composite acid compound and the polymer acid component, whereby deterioration of the acid component due to heat can be suppressed.
- the composite acid compound and the polymeric acid component are more excellent in thermal stability than the composite acid compound. Therefore, when the acid component contains the composite oxide compound, deterioration of the acid component due to heat can be particularly suppressed.
- the acid component preferably contains boric acid.
- the complex acid compound may be hydrolyzed by water contained in the liquid component 26.
- the complex acid compound is borodisalicylic acid
- boric acid and salicylic acid are generated by a hydrolysis reaction of borodisalicylic acid. Since this salicylic acid can corrode the anode body 21 or the cathode body 22, it is necessary to suppress the hydrolysis of the complex acid compound and the production of salicylic acid.
- the acid component contains boric acid
- the hydrolysis reaction of the complex acid compound can be suppressed. This is because, since the hydrolysis reaction is an equilibrium reaction, the progress of the hydrolysis reaction can be suppressed when the acid component contains boric acid.
- the acid component preferably further contains at least one selected from the group consisting of phosphate esters and borate esters. Since the phosphate ester and the borate ester have water absorbability, the hydrolysis reaction of the complex acid compound can be made less likely to occur. When the phosphate ester absorbs water, phosphoric acid is generated, whereas when the borate ester absorbs water, boric acid is generated. When boric acid is generated, the equilibrium of the hydrolysis reaction of the complex acid compound leans toward the side where the complex acid compound is produced. For this reason, the acid component preferably contains a borate ester rather than a phosphate ester.
- the solvent contains a polyalkylene glycol having 3 or more carbon atoms in the repeating unit.
- Polyalkylene glycols having 3 or more carbon atoms in the repeating unit have a longer chain than polyethylene glycol and are less likely to evaporate. For this reason, even when heat is generated in the electrolytic capacitor 1, the solvent is not easily evaporated, and the evaporated solvent passes through the gap between the case 11 and the sealing member 12 or the sealing member 12 itself, and The reduction of the solvent can be suppressed. Therefore, compared to the case where the solvent contains polyethylene glycol or the like, it is easier to suppress the solvent in the liquid component 26 from decreasing.
- the freezing point of the solvent can be lowered, and the electrolytic capacitor 1 can be easily used at a low temperature.
- the solvent contains a polyalkylene glycol having a repeating unit having 3 or more carbon atoms
- the complex acid compound can be easily dissolved in the solvent, so that the complex acid compound can easily exert a repair effect on the dielectric layer 210. That is, the portion of the dielectric layer 210 where the metal foil of the anode body 21 is exposed can be oxidized with the complex acid compound, and the dielectric layer 210 can be formed.
- the polyalkylene glycol having 3 or more carbon atoms in the repeating unit may be a homopolymer or a copolymer.
- the polyalkylene glycol having 3 or more carbon atoms in the repeating unit is preferably a copolymer containing an alkylene oxide in which the repeating unit has 3 or more carbon atoms in the repeating unit. That is, a polyalkylene glycol having 3 or more carbon atoms in the repeating unit is a copolymer containing an alkylene oxide having 3 or more carbon atoms in the repeating unit and a repeating unit other than the alkylene oxide having 3 or more carbon atoms in the repeating unit.
- the freezing point of the solvent can be made lower than when the polyalkylene glycol having 3 or more carbon atoms in the repeating unit is a homopolymer, and the electrolytic capacitor 1 can be used at a lower temperature.
- the alkylene oxide having 3 or more carbon atoms in the repeating unit include propylene oxide (PO) and butylene oxide (BO).
- the copolymer may include PO or BO, or may include PO and BO.
- the copolymer containing an alkylene oxide having 3 or more carbon atoms in the repeating unit preferably contains ethylene oxide (EO) having 2 carbon atoms in the repeating unit. That is, the polyalkylene glycol having 3 or more carbon atoms in the repeating unit is preferably a copolymer containing an alkylene oxide having 3 or more carbon atoms in the repeating unit and an ethylene oxide having 2 carbon atoms in the repeating unit. In this case, the freezing point of the solvent can be particularly lowered, and the electrolytic capacitor 1 can be used particularly at a low temperature.
- the copolymer may include PO and EO, may include BO and EO, and may include PO, BO, and EO.
- the copolymer may be a random copolymer, a block copolymer, or a block random copolymer.
- the solvent contains a polyol containing two or more hydroxyl groups.
- the complex acid compound can be dissolved in the solvent.
- the polyol containing two or more hydroxyl groups hardly evaporates even when the electrolytic capacitor 1 generates heat, the solvent evaporates and passes through the gap between the case 11 and the sealing member 12 or the sealing member 12 itself, The decrease in the solvent in the liquid component 26 can be suppressed.
- the dopant of the conductive polymer 250 contains polystyrene sulfonic acid
- the polyol containing two or more hydroxyl groups can extend the polymer chain of the polystyrene sulfonic acid in the conductive polymer 250.
- the conductive polymer 250 can be swollen. In this case, the conductivity of the conductive polymer 250 can be improved.
- the polyol containing two or more hydroxyl groups include alkylene glycols such as ethylene glycol, diethylene glycol, triethylene glycol, and propylene glycol, sugars such as pentaerythritol, and polyols containing three or more hydroxyl groups such as glycerin and polyglycerin.
- the polyol containing two or more hydroxyl groups contains an alkylene glycol having 3 or more carbon atoms. Alkylene glycol having 3 or more carbon atoms is unlikely to evaporate even when the electrolytic capacitor 1 generates heat, so that the solvent in the liquid component 26 can be prevented from decreasing.
- the dopant of the conductive polymer 250 contains polystyrene sulfonic acid
- the alkylene glycol having 3 or more carbon atoms can swell the conductive polymer 250 and improve the conductivity of the conductive polymer 250. it can.
- propylene glycol is particularly preferable among alkylene glycols having 3 or more carbon atoms.
- the polyol containing two or more hydroxyl groups contains at least one selected from the group consisting of glycerin and polyglycerin.
- Glycerin and polyglycerin hardly evaporate even when the electrolytic capacitor 1 generates heat, so that the solvent in the liquid component 26 can be prevented from decreasing.
- the dopant of the conductive polymer 250 includes polystyrene sulfonic acid, glycerin and polyglycerin can swell the conductive polymer 250 and improve the conductivity of the conductive polymer 250.
- the liquid component 26 can be obtained by containing the complex acid compound and the solvent containing one or more selected from the group consisting of glycerin and polyglycerin. Can be lowered. This is probably because glycerin or polyglycerin is a protic solvent.
- the weight of the polyalkylene glycol having 3 or more carbon atoms in the repeating unit in the solvent is preferably larger than the weight of the polyol containing two or more hydroxyl groups. That is, it is preferable that the polyalkylene glycol in which the number of carbon atoms of the repeating unit is 3 or more is larger than the polyol having two or more hydroxyl groups by weight ratio in the solvent.
- the polyalkylene glycol having 3 or more carbon atoms in the repeating unit When a polyalkylene glycol having 3 or more carbon atoms in the repeating unit is compared with a polyol having 2 or more hydroxyl groups, the polyalkylene glycol having 3 or more carbon atoms in the repeating unit generates heat of the electrolytic capacitor 1. Is also difficult to evaporate.
- a metal foil as a raw material of the anode body 21 is prepared.
- a plurality of fine irregularities can be formed on the surface of the metal foil.
- the surface of the metal foil can be roughened, for example, by etching the metal foil.
- etching treatment for example, a direct current electrolysis method or an alternating current electrolysis method can be employed.
- the dielectric layer 210 is formed on the surface of the roughened metal foil.
- the method for forming the dielectric layer 210 is not particularly limited, but can be formed by, for example, subjecting a metal foil to a chemical conversion treatment.
- the chemical conversion treatment for example, the roughened metal foil is immersed in a chemical conversion solution such as an ammonium adipate solution, and then heated or applied with a voltage.
- the anode body 21 having the dielectric layer 210 formed on the surface can be manufactured.
- the anode body 21 may be manufactured by forming the dielectric layer 210 on a metal foil cut in advance to a desired size.
- the lead wire 14A is connected to the anode body 21.
- the connection method between the anode body 21 and the lead wire 14A is not particularly limited, but for example, caulking bonding or ultrasonic welding can be used.
- Cathode body 22 can be produced from a metal foil in the same manner as anode body 21.
- the method for connecting the cathode body 22 and the lead wire 14B is not particularly limited, but for example, caulking or ultrasonic waves can be used.
- the surface of cathode body 22 may be roughened, or a layer containing titanium or carbon may be formed on the surface of cathode body 22.
- a wound body is produced using the anode body 21, the cathode body 22, and the separator 23 as shown in FIG.
- An end portion of the cathode body 22 located at the outermost layer is fixed with a wrapping tape 24.
- a dielectric layer may be provided on a cut surface of the anode body 21 by further performing a chemical conversion treatment on the wound body.
- the capacitor element 10 is produced by forming the solid electrolyte 25 containing the conductive polymer 250 on the surface of the dielectric layer 210 formed on the surface of the anode body 21. .
- the solid electrolyte 25 can be formed by attaching a conductive polymer 250 formed in advance to the dielectric layer 210.
- a polymer dispersion containing the conductive polymer 250 is preferably used.
- the polymer dispersion includes a volatile liquid component and a conductive polymer 250 dispersed in the volatile liquid component and doped with a dopant.
- the solid electrolyte 25 can be attached to the surface of the dielectric layer 210 by impregnating the wound body with the polymer dispersion and then drying.
- the solid electrolyte 25 can be attached to the surface of the separator 23 and the surface of the cathode body 22.
- the conductive polymer 250 can be attached to the separator 23. This step may be repeated two or more times. In this case, the coverage of the dielectric layer 210 with the solid electrolyte 25 can be increased.
- the liquid component 26 is impregnated into the capacitor element 10. Thereby, the liquid component 26 can be impregnated into the fine voids in the solid electrolyte 25. As a result, the liquid component 26 comes into contact with the dielectric layer 210 and the solid electrolyte 25.
- the method for impregnating the capacitor element 10 with the liquid component 26 is not particularly limited.
- an electrolytic capacitor 1 as shown in FIG. 1 is obtained. Thereafter, the aging process may be performed while applying the rated voltage.
- the use of the electrolytic capacitor 1 is not particularly limited.
- the electrolytic capacitor 1 can be used, for example, as a board of a vehicle ECU (engine control unit) or a switching power supply.
- the vehicle is mainly assumed to be an electric vehicle or a hybrid vehicle, but may be a gasoline engine vehicle or a diesel engine vehicle.
- the electrolytic capacitor 1 may be used for, for example, a motorcycle (including an electric motorcycle), an aircraft, a ship, a drone, and the like.
- the electrolytic capacitor 1 may be used for a power supply device of a CPU (Central Processing Unit) such as a server device, a computer device, and a home game machine.
- a CPU Central Processing Unit
- the electrolytic capacitor 1 may be used for, for example, a power supply device of a field-programmable gate array (FPGA) of a communication device and an industrial device, and a power supply device of a GPU (Graphics Processing Unit) such as a graphic board. Good.
- FPGA field-programmable gate array
- GPU Graphics Processing Unit
- the use of the electrolytic capacitor 1 is not limited to these, and can be used in various fields.
- the configuration of the electrolytic capacitor 1 is not limited to the configuration of the above-described embodiment.
- the capacitor element 10 may be a chip type using a metal sintered body as an anode body instead of a wound body, or a stacked type using a metal plate as an anode body.
- a polymer solution may be applied to the dielectric layer 210, and formed in situ by a chemical polymerization method or an electrolytic polymerization method. That is, the conductive polymer 250 may be formed by a chemical polymerization method using a polymerization liquid or an electrolytic polymerization method.
- the polymerization liquid is a solution containing a monomer, an oligomer, a dopant, and the like.
- an oxidizing agent is added to the polymerization solution.
- the polymerization liquid preferably contains, for example, one or more components selected from the group consisting of pyrrole, aniline, thiophene, and derivatives thereof.
- the solid electrolyte 25 may not include the conductive polymer 250.
- the solid electrolyte 25 may be, for example, manganese dioxide or an organic semiconductor.
- the electrolytic capacitor 1 has an anode body 21, a cathode body 22, a solid electrolyte 25, and a liquid component 26, as in the first embodiment.
- the anode body 21 has a dielectric layer 210 formed on the surface.
- the solid electrolyte 25 is in contact with the dielectric layer 210 and is interposed between the anode body 21 and the cathode body 22.
- the liquid component 26 comes into contact with the dielectric layer 210 and the solid electrolyte 25 and includes a solvent and an acid component.
- the acid component includes a complex acid compound of an inorganic acid and an organic acid.
- the solvent contains a polyol containing two or more hydroxyl groups.
- the electrolytic capacitor 1 according to the second embodiment is different from the electrolytic capacitor 1 according to the first embodiment in that the solvent contains polyalkylene glycol and the weight of the polyalkylene glycol in the solvent is larger than the weight of the polyol containing two or more hydroxyl groups. Different from the electrolytic capacitor 1.
- the polyalkylene glycol having 3 or more carbon atoms in the repeating unit does not include the polyalkylene glycol having 2 carbon atoms in the repeating unit, but the polyalkylene glycol includes a polyalkylene glycol having 2 carbon atoms in the repeating unit. included.
- polyalkylene glycol includes polyethylene glycol. Therefore, in the electrolytic capacitor 1 according to the second embodiment, the solvent can include polyethylene glycol.
- the weight of the polyalkylene glycol in the solvent By setting the weight of the polyalkylene glycol in the solvent to be larger than that of the polyol containing two or more hydroxyl groups, the freezing point of the solvent can be lowered, and the electrolytic capacitor 1 can be easily used even at a low temperature.
- polyalkylene glycol is compared with a polyol containing two or more hydroxyl groups, polyalkylene glycol is less likely to evaporate. Therefore, by increasing the weight ratio of the polyalkylene glycol in the solvent, even when the electrolytic capacitor 1 is used in an environment where heat is likely to be generated in the electrolytic capacitor 1, for example, in a state in which high frequency is applied to the electrolytic capacitor 1, the liquid It is easy to suppress the decrease in the solvent in the component 26.
- a wound electrolytic capacitor ( ⁇ 10 mm ⁇ L (height) 10 mm) having a rated voltage of 25 V and a rated capacitance of 330 ⁇ F was manufactured.
- An etching treatment was performed on an aluminum foil having a thickness of 100 ⁇ m to roughen the surface of the aluminum foil.
- a dielectric layer was formed on the surface of the aluminum foil by a chemical conversion treatment.
- the chemical conversion treatment was performed by immersing the aluminum foil in an ammonium adipate solution and applying a voltage of 50 V thereto. Thereafter, the aluminum foil was cut to prepare an anode body.
- the obtained reaction solution is dialyzed to remove unreacted monomers and excess oxidizing agent, to obtain a polymer dispersion containing about 5% by mass of polyethylene dioxythiophene (PEDOT / PSS) doped with PSS.
- PEDOT / PSS polyethylene dioxythiophene
- PSS polyethylene dioxythiophene
- ESR change The initial equivalent series resistance (ESR) of the obtained electrolytic capacitor was measured. Next, in order to evaluate long-term reliability, the sample was held at 125 ° C. for 5000 hours while applying a rated voltage, and the ESR change rate ( ⁇ ESR) was confirmed.
- ⁇ ESR was indicated by the ratio (X / X 0 ) of the ESR (X) after holding at 125 ° C. to the initial value (X 0 ).
- the ESR was measured at a frequency of 100 kHz of the electrolytic capacitor using an LCR meter in a room temperature environment.
- the electrolytic capacitor (1) has an anode body (21), a cathode body (22), a solid electrolyte (25), and a liquid component (26).
- the anode body (21) has a dielectric layer (210) formed on the surface.
- the solid electrolyte (25) is in contact with the dielectric layer (210) and is interposed between the anode body (21) and the cathode body (22).
- the liquid component (26) contacts the dielectric layer (210) and the solid electrolyte (25) and includes a solvent and an acid component.
- the acid component includes a complex acid compound of an inorganic acid and an organic acid.
- the solvent includes a polyol having two or more hydroxyl groups and a polyalkylene glycol having a repeating unit having three or more carbon atoms.
- the complex acid compound can be dissolved in the solvent.
- the freezing point of the solvent can be lowered.
- the electrolytic capacitor (1) can be easily used even at a low temperature, and the electrolytic capacitor (1) can be used at various temperatures.
- the electrolytic capacitor (1) has an anode body (21), a cathode body (22), a solid electrolyte (25), and a liquid component (26).
- the anode body (21) has a dielectric layer (210) formed on the surface.
- the solid electrolyte (25) is in contact with the dielectric layer (210) and is interposed between the anode body (21) and the cathode body (22).
- the liquid component (26) contacts the dielectric layer (210) and the solid electrolyte (25) and includes a solvent and an acid component.
- the acid component includes a complex acid compound of an inorganic acid and an organic acid.
- the solvent includes a polyol having two or more hydroxyl groups and a polyalkylene glycol. The weight of the polyalkylene glycol is greater than the weight of the polyol.
- the complex acid compound can be dissolved in the solvent.
- the freezing point of the solvent can be lowered.
- the electrolytic capacitor (1) can be easily used even at a low temperature, and the electrolytic capacitor (1) can be used at various temperatures.
- the polyol in the first or second aspect, includes an alkylene glycol having 3 or more carbon atoms.
- the solvent in the liquid component (26) can be prevented from decreasing. Further, the conductivity of the conductive polymer (250) can be improved.
- the polyol includes at least one selected from the group consisting of glycerin and polyglycerin.
- a decrease in the amount of the solvent in the liquid component (26) can be suppressed. Further, the conductivity of the conductive polymer (250) can be improved. Further, the pH of the liquid component (26) can be lowered as compared with the case where the solvent is ⁇ -butyrolactone or sulfolane.
- An electrolytic capacitor (1) according to a fifth aspect is the electrolytic capacitor (1) according to any one of the first, third, and fourth aspects, wherein the polyalkylene glycol contains an alkylene oxide having a repeating unit having 3 or more carbon atoms. It is a polymer.
- the solidification point of the solvent can be made lower than when the polyalkylene glycol having 3 or more carbon atoms in the repeating unit is a homopolymer, and the electrolytic capacitor (1) can be cooled at a lower temperature. Easy to use.
- the weight of the polyalkylene glycol is larger than the weight of the polyol.
- the solvent in the liquid component (26) can be used. Reduction can be suppressed.
- the acid component contains boric acid.
- the hydrolysis reaction of the complex acid compound can be suppressed.
- An electrolytic capacitor (1) according to an eighth aspect is the electrolytic capacitor (1) according to any one of the first to seventh aspects, wherein the complex acid compound is selected from the group consisting of borodisalicylic acid, boroglycolic acid, and borodisoxalic acid. Or more than one.
- the complex acid compound is unlikely to undergo chemical change. Further, the pH of the liquid component (26) can be lowered, and the undoping phenomenon in which the dopant separates from the conductive polymer (250) can be suppressed.
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Abstract
Description
1.概要
本開示の一実施形態に係る電解コンデンサ1は、図1~3に示すように、陽極体21と陰極体22と固体電解質25と液状成分26とを有する。陽極体21は、表面に誘電体層210が形成される。固体電解質25は、誘電体層210と接触し、陽極体21と陰極体22との間に介在する。液状成分26は、誘電体層210および固体電解質25に接触し、溶媒及び酸成分を含む。酸成分は、無機酸および有機酸の複合酸化合物を含む。溶媒は、水酸基を2以上含む系ポリオールと、繰り返し単位の炭素数が3以上のポリアルキレングリコールとを含む。または、溶媒は、水酸基を2以上含むポリオールと、ポリアルキレングリコールとを含み、ポリアルキレングリコールの重量は、ポリオールの重量よりも多い。
2-1.電解コンデンサ
以下、本実施形態に係る電解コンデンサ1の構成を詳細に説明する。
ケース11は、コンデンサ素子10を収容可能なように構成されている。具体的には、ケース11は、筒状の部材であって、底部が開口しておらず、頂部が開口している。このため、ケース11の開口からケース11の内部にコンデンサ素子10を入れることができる。ケース11は、例えば、アルミニウム、ステンレス鋼、銅、鉄、真鍮及びこれらの合金からなる群から選択される一種以上の材料製である。
ケース11の開口は、封止部材12で塞がれている。封止部材12は、例えば、EPT(ethylene-propyleneterpolymer)、IIR(isobutylene‐isoprenerubber)等のゴム材料、又はエポキシ樹脂等の樹脂材料製である。封止部材12は、一対の貫通孔を備える。ケース11は、その開口端近傍が内側に向かって絞り加工され、その開口端はカール加工されており、これによって封止部材12がかしめられている。さらに、この封止部材12は、座板13で覆われている。座板13は、例えば、絶縁性の樹脂材料製である。
一対のリード線14A及びリード線14Bは、封止部材12の貫通孔から引き出され、かつ座板13を貫通している。一対のリードタブ15A及びリードタブ15Bは、封止部材12に埋め込まれている。リードタブ15Aは、リード線14Aとコンデンサ素子10の電極とを電気的に接続している。またリードタブ15Bは、リード線14Bとコンデンサ素子10の電極とを電気的に接続している。
以下、ケース11内に収容されるコンデンサ素子10について、詳細に説明する。
図3に示すように、陽極体21は、金属箔と、金属箔の表面に形成された誘電体層210と、を含む。
陰極体22としては、陽極体21の製造で使用される金属箔と同様の金属箔を用いることができる。陰極体22は、その表面が粗面化されていてもよい。陰極体22は、その表面に、例えばチタン又はカーボンを含む層が形成されていてもよい。
図3に示すように、固体電解質25は、誘電体層210と接触し、かつ、陽極体21及び陰極体22との間に介在する。固体電解質25は、内部に微細な空隙を有する多孔質である。固体電解質25は、揮発性液状成分と、この揮発性液状成分に分散された導電性高分子250を含む高分子分散体を、コンデンサ素子10に含浸させ、コンデンサ素子10から揮発性液状成分を揮発させることで形成され得る。この場合、電解コンデンサ1の耐電圧特性を向上させられる。このため、固体電解質25は、導電性高分子250を含むことが好ましい。また導電性高分子250は、誘電体層210の表面の少なくとも一部に付着される。また導電性高分子250は、セパレータ23に付着される。
液状成分26は、コンデンサ素子10に含浸されており、具体的には、固体電解質25の複数の空隙内に液状成分が入り込んでいる。このため、液状成分26は、誘電体層210及び固体電解質25と接触している。
以下、電解コンデンサ1の製造方法の一例を、各工程ごとに説明する。
まず、陽極体21の原料である金属箔を準備する。この金属箔の表面を粗面化することにより、金属箔の表面に複数の微細な凹凸を形成することができる。金属箔の表面の粗面化は、例えば、金属箔をエッチング処理することで行うことができる。エッチング処理としては、例えば、直流電解法又は交流電解法を採用することができる。
陰極体22は、陽極体21と同様の方法により、金属箔から作製することができる。
この工程では、陽極体21、陰極体22及びセパレータ23を用いて、図2に示すよう巻回体を作製する。最外層に位置する陰極体22の端部を巻止めテープ24で固定する。陽極体21を大判の金属箔を裁断することで作製した場合には、巻回体に更に化成処理を施すことで、陽極体21の裁断面に誘電体層を設けてもよい。
この工程では、陽極体21の表面に形成された誘電体層210の表面に、導電性高分子250を含む固体電解質25を形成することによって、コンデンサ素子10を作製する。
次に、コンデンサ素子10に液状成分26を含浸させる。これにより、固体電解質25内の微細な空隙内に液状成分26を含浸させることができる。これにより、液状成分26は、誘電体層210及び固体電解質25に接触した状態となる。液状成分26をコンデンサ素子10に含浸させる方法は、特に限定されない。
次に、コンデンサ素子10をケース11に収納する。
電解コンデンサ1の用途は、特に限定されない。電解コンデンサ1は、例えば、自動車のECU(エンジンコントロールユニット)の基板、又はスイッチング電源等に使用することができる。この自動車としては、主として、電気自動車又はハイブリッド車等を想定するが、ガソリンエンジン車又はディーゼルエンジン車であってもよい。また電解コンデンサ1は、例えば、二輪車(電動バイクを含む)、航空機、船舶、ドローン等に用いられてもよい。また電解コンデンサ1は、例えば、サーバ装置、コンピュータ装置及び家庭用ゲーム機等のCPU(Central Processing Unit)の電源装置に用いられてもよい。その他にも、電解コンデンサ1は、例えば、通信機器及び産業機器等のFPGA(Field-Programmable Gate Array)の電源装置、並びにグラフィックボード等のGPU(Graphics Processing Unit)の電源装置等に用いられてもよい。電解コンデンサ1の用途は、これらに限定されず、多岐の分野に使用することができる。
電解コンデンサ1の構成は、上述の実施形態の構成に限定されない。
第2実施形態に態様に係る電解コンデンサ1は、第1実施形態と同様に、陽極体21と陰極体22と固体電解質25と液状成分26とを有する。陽極体21は、表面に誘電体層210が形成される。固体電解質25は、誘電体層210と接触し、陽極体21と陰極体22との間に介在する。液状成分26は、誘電体層210および固体電解質25に接触し、溶媒及び酸成分を含む。酸成分は、無機酸および有機酸の複合酸化合物を含む。溶媒は、水酸基を2以上含むポリオールを含む。
(陽極体の準備)
厚さ100μmのアルミニウム箔にエッチング処理を行い、アルミニウム箔の表面を粗面化した。その後、アルミニウム箔の表面に化成処理により誘電体層を形成した。化成処理は、アジピン酸アンモニウム溶液にアルミニウム箔を浸漬し、これに50Vの電圧を印加することにより行った。その後、アルミニウム箔を裁断して、陽極体を準備した。
(陰極体の準備)
厚さ50μmのアルミニウム箔にエッチング処理を行い、アルミニウム箔の表面を粗面化した。その後、アルミニウム箔を裁断して、陰極体を準備した。
(巻回体の作製)
陽極体および陰極体に陽極リードタブおよび陰極リードタブを接続し、陽極体と陰極体とをリードタブを巻き込みながらセルロースのセパレータを介して巻回した。巻回体から突出する各リードタブの端部には、陽極リード線および陰極リード線をそれぞれ接続した。作製された巻回体に対して、再度化成処理を行い、陽極体の切断された端部に誘電体層を形成した。次に、巻回体の外側表面の端部を巻止めテープで固定して巻回体を作製した。
(高分子分散体の調製)
3,4-エチレンジオキシチオフェンと、高分子ドーパントであるポリスチレンスルホン酸(PSS、重量平均分子量10万)とを、イオン交換水に溶かし、混合溶液を調製した。混合溶液を撹拌しながらイオン交換水に溶かした硫酸鉄(III)(酸化剤)を添加し、重合反応を行った。反応後、得られた反応液を透析し、未反応モノマーおよび過剰な酸化剤を除去し、PSSがドープされたポリエチレンジオキシチオフェン(PEDOT/PSS)を約5質量%含む高分子分散体を得た。
(固体電解質層の形成)
減圧雰囲気(40kPa)中で、所定容器に収容された高分子分散体に巻回体を5分間浸漬し、その後、高分子分散体から巻回体を引き上げた。次に、高分子分散体を含浸した巻回体を、150℃の乾燥炉内で20分間乾燥させ、誘電体層の少なくとも一部を被覆する導電性高分子層からなる固体電解質層を形成した。
(電解液の含浸)
表1に示す成分を表1に示す割合で含む電解液を調製し、減圧雰囲気(40kPa)中で液状成分(電解液)に巻回体を5分間浸漬した。
(コンデンサ素子の封止)
電解液を含浸させたコンデンサ素子を封止して、図1に示すような電解コンデンサ(実施例1~15、比較例1および2)を完成させた。その後、定格電圧を印加しながら、130℃で2時間エージング処理を行った。
得られた電解コンデンサについて、以下の方法で低温ESRとESR変化率を測定した。
環境温度-55℃で、LCRメータを用いて、電解コンデンサの周波数100kHz/ΩにおけるESRを測定した。その結果を表1に示す。
得られた電解コンデンサの初期等価直列抵抗(ESR)を測定した。次に、長期信頼性を評価するために、定格電圧を印加しながら125℃で5000時間保持し、ESRの変化率(ΔESR)を確認した。
第1の態様に係る電解コンデンサ(1)は、陽極体(21)と陰極体(22)と固体電解質(25)と液状成分(26)とを有する。陽極体(21)は、表面に誘電体層(210)が形成される。固体電解質(25)は、誘電体層(210)と接触し、陽極体(21)と陰極体(22)との間に介在する。液状成分(26)は、誘電体層(210)および固体電解質(25)に接触し、溶媒及び酸成分を含む。前記酸成分は、無機酸および有機酸の複合酸化合物を含む。前記溶媒は、水酸基を2以上含むポリオールと、繰り返し単位の炭素数が3以上であるポリアルキレングリコールとを含む。
21 陽極体
210 誘電体層
22 陰極体
25 固体電解質
26 液状成分
Claims (8)
- 表面に誘電体層が形成された陽極体と、
陰極体と、
前記誘電体層と接触し、前記陽極体と前記陰極体との間に介在する固体電解質と、
前記誘電体層および前記固体電解質に接触し、溶媒及び酸成分を含む液状成分と、を有し、
前記酸成分は、無機酸および有機酸の複合酸化合物を含み、
前記溶媒は、水酸基を2以上含むポリオールと、繰り返し単位の炭素数が3以上であるポリアルキレングリコールとを含む、
電解コンデンサ。 - 表面に誘電体層が形成された陽極体と、
陰極体と、
前記誘電体層と接触し、前記陽極体と前記陰極体との間に介在する固体電解質と、
前記誘電体層および前記固体電解質に接触し、溶媒及び酸成分を含む液状成分と、を有し、
前記酸成分は、無機酸および有機酸の複合酸化合物を含み、
前記溶媒は、水酸基を2以上含むポリオールと、ポリアルキレングリコールとを含み、
前記ポリアルキレングリコールの重量は、前記ポリオールの重量よりも多い、
電解コンデンサ。 - 前記ポリオールは、炭素数3以上のアルキレングリコールを含む
請求項1又は2に記載の電解コンデンサ。 - 前記ポリオールは、グリセリン及びポリグリセリンからなる群から選択される一種以上を含む、
請求項1~3のいずれか一項に記載の電解コンデンサ。 - 前記ポリアルキレングリコールは、繰り返し単位の炭素数が3以上のアルキレンオキサイドを含む共重合体である、
請求項1、3及び4のいずれか一項に記載の電解コンデンサ。 - 前記ポリアルキレングリコールの重量は、前記ポリオールの重量よりも多い、
請求項1、3、4及び5のいずれか一項に記載の電解コンデンサ。 - 前記酸成分は、ホウ酸を含む、
請求項1~6のいずれか一項に記載の電解コンデンサ。 - 前記複合酸化合物は、ボロジサリチル酸、ボロジグリコール酸、及びボロジシュウ酸からなる群から選択される一種以上を含む、
請求項1~7のいずれか一項に記載の電解コンデンサ。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201980044192.7A CN112424893B (zh) | 2018-07-26 | 2019-07-26 | 电解电容器 |
| US17/261,819 US20210343482A1 (en) | 2018-07-26 | 2019-07-26 | Electrolytic capacitor |
| CN202211452386.0A CN115798934A (zh) | 2018-07-26 | 2019-07-26 | 电解电容器 |
| JP2020532491A JPWO2020022471A1 (ja) | 2018-07-26 | 2019-07-26 | 電解コンデンサ |
| EP19841228.0A EP3828907A4 (en) | 2018-07-26 | 2019-07-26 | ELECTROLYTIC CAPACITOR |
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| JP2018-140625 | 2018-07-26 | ||
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| WO2020022471A1 true WO2020022471A1 (ja) | 2020-01-30 |
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| US (1) | US20210343482A1 (ja) |
| EP (1) | EP3828907A4 (ja) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022065497A1 (ja) * | 2020-09-28 | 2022-03-31 | 日本ケミコン株式会社 | 電解コンデンサ用電解液および電解コンデンサ |
| WO2022065434A1 (ja) * | 2020-09-25 | 2022-03-31 | パナソニックIpマネジメント株式会社 | 電解コンデンサ |
| US20220351912A1 (en) * | 2020-01-30 | 2022-11-03 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor and method for manufacturing same |
| WO2025115979A1 (ja) * | 2023-11-30 | 2025-06-05 | パナソニックIpマネジメント株式会社 | 電解コンデンサ |
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- 2019-07-26 CN CN202211452386.0A patent/CN115798934A/zh active Pending
- 2019-07-26 EP EP19841228.0A patent/EP3828907A4/en not_active Withdrawn
- 2019-07-26 WO PCT/JP2019/029373 patent/WO2020022471A1/ja not_active Ceased
- 2019-07-26 JP JP2020532491A patent/JPWO2020022471A1/ja active Pending
- 2019-07-26 CN CN201980044192.7A patent/CN112424893B/zh active Active
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220351912A1 (en) * | 2020-01-30 | 2022-11-03 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor and method for manufacturing same |
| US12417883B2 (en) * | 2020-01-30 | 2025-09-16 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor and method for manufacturing same |
| WO2022065434A1 (ja) * | 2020-09-25 | 2022-03-31 | パナソニックIpマネジメント株式会社 | 電解コンデンサ |
| JPWO2022065434A1 (ja) * | 2020-09-25 | 2022-03-31 | ||
| US12300445B2 (en) | 2020-09-25 | 2025-05-13 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor |
| WO2022065497A1 (ja) * | 2020-09-28 | 2022-03-31 | 日本ケミコン株式会社 | 電解コンデンサ用電解液および電解コンデンサ |
| JPWO2022065497A1 (ja) * | 2020-09-28 | 2022-03-31 | ||
| EP4220675A4 (en) * | 2020-09-28 | 2025-06-18 | Nippon Chemi-Con Corporation | ELECTROLYTIC SOLUTION FOR ELECTROLYTIC CAPACITORS, AND ELECTROLYTIC CAPACITOR |
| JP7727271B2 (ja) | 2020-09-28 | 2025-08-21 | 日本ケミコン株式会社 | 電解コンデンサ用電解液および電解コンデンサ |
| WO2025115979A1 (ja) * | 2023-11-30 | 2025-06-05 | パナソニックIpマネジメント株式会社 | 電解コンデンサ |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112424893B (zh) | 2022-12-06 |
| EP3828907A1 (en) | 2021-06-02 |
| US20210343482A1 (en) | 2021-11-04 |
| JPWO2020022471A1 (ja) | 2021-08-02 |
| CN112424893A (zh) | 2021-02-26 |
| EP3828907A4 (en) | 2021-10-06 |
| CN115798934A (zh) | 2023-03-14 |
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