26results about "Liquid electrolytic capacitors" patented technology

This application relates to the field of electronic component technology, specifically to a novel rare-earth capacitor and its preparation method. The novel rare-earth capacitor provided by this application includes: an anode, a cathode, and a rare-earth electrolyte. The anode is an aluminum substrate plated with titanium. The rare-earth electrolyte includes: an organic solvent, an electrolyte salt, and rare-earth electrolyte additives. The organic solvent includes: a mixture of ethylene glycol (EG) and gluconate (GBL). The electrolyte salt includes: ammonium phthalate and imidazole salt. The cathode is titanium foil. This application can meet the stringent low-temperature environment requirements of -40℃ and possesses extremely high resistance to blast impact and vibration. Even in extreme conditions where the distance between adjacent detonators is only 0.3–0.5 meters and there is a millisecond-level delay in detonation, it can still ensure that the electronic detonator is not affected by the preceding explosion. This product can replace existing imported tantalum capacitors, achieving domestic supply chain integration and effectively reducing costs.

This electrolytic capacitor includes a capacitor element and a liquid component. The capacitor element includes a conductive component. The conductive component includes a conductive polymer. The liquid component includes a solvent, a base component, a first acid component, and a second acid component. The total mass content of the base component, the first acid component, and the second acid component in the liquid component is 3% to 15% inclusive. The base dissociation constant pKb of the base component is more than 4.75 and equal to or less than 7.00. The first acid component has a first aromatic ring and two or more first carboxyl groups that are bonded to the first aromatic ring. The second acid component has a second aromatic ring, and a second carboxyl group and a hydroxyl group which are bonded to the second aromatic ring. The mass content Ma1 of the first acid component, the mass content Ma2 of the second acid component, and the mass content Mb of the base component in the liquid component satisfy the following relational expressions. 1.5 ≤ (Ma1 + Ma2) / Mb ≤ 3.0 0.8 ≤ Ma1 / Ma2 ≤ 6.0

The present disclosure provides a core package, an aluminum electrolytic capacitor and a packaging method thereof. The core package includes a plurality of first electrode foils and second electrode foils laminated one on another, each of the first electrode foils is an anode foil or a cathode foil, and the second electrode foil is the other. Among the plurality of first electrode foils, a first conductive foil is arranged at the edge of each of the first electrode foils, a first portion of the first conductive foil is electrically coupled to the corresponding first electrode foil, and a second portion of the first conductive foil extends and protrudes relative to the corresponding first electrode foil; and the plurality of first conductive foils are connected to a first conductive foil strip through the second portion; and an oxide film is formed on a surface of the first conductive foil.

An electrolytic capacitor according to the present invention comprises a capacitor element and a liquid component impregnated in the capacitor element. The capacitor element includes: an anode foil provided with a dielectric layer; a cathode foil; a wound body obtained by winding a separator interposed between the anode foil and the cathode foil; a first electroconductive polymer layer formed on the separator; and a winding stop tape for fixing a winding end portion of the wound body. The coating amount of the first electroconductive polymer layer on the separator is 0.04 mg / cm2 or more. A lactone compound is present in the liquid component in a proportion of 40 mass% or less.

To provide, for example, a separator suited to a capacitor that includes cathode foil on which a carbon layer is formed, and a capacitor including the separator.SOLUTION: A capacitor (2) includes anode foil (12), cathode foil (14), and a separator (16) disposed between the anode foil and the cathode foil. The cathode foil includes a carbon layer (20), and the separator is in contact with the carbon layer and has a density [symbol: ρ, unit: g / cm3] that satisfies the following formula: ρ≥4.0×10-3×WPA, where WPA represents the amount of carbon per square centimeter of the separator [unit: μg / cm2].SELECTED DRAWING: Figure 1

An electrolytic capacitor according to the present invention includes a capacitor element and a liquid component. The capacitor element comprises an anode body having a dielectric layer on a surface thereof, and a conductive polymeric compound covering at least a portion of the dielectric layer. The liquid component includes an acid component, a base component, a solvent, and an antioxidant. The solvent includes water and a polyol compound. The acid component includes a coordination compound containing a central atom and an organic molecule having a plurality of coordinating atoms bonded to the central atom, and at least one of the plurality of coordinating atoms is an oxygen atom bonded to a carbonyl group.

An electrolytic capacitor includes a porous anode body, a dielectric layer formed on a surface of the anode body, and a conductive polymer and a salt compound that are filled inside pores of the anode body. L is a shortest distance from a center of the anode body to a first principal surface of the anode body, the first principal surface being closest to the center, and a region in which a minimum value of respective distances to principal surfaces of the anode body is L / 3 or less, and a region in which the minimum value is 2L / 3 or more, are defined as a surface layer part and a central part, respectively, inside the anode body. A ratio B / A of an ion strength B derived from the salt compound to a sum A of all ion strengths measured by time-of-flight secondary ion mass spectrometry (TOF-SIMS) in a cross section that passes through the center and that is perpendicular to the first principal surface is defined as an ion strength ratio. A ratio R2 / R1 of an ion strength ratio R2 in the central part of the anode body to an ion strength ratio R1 in the surface layer part of the anode body is 0.15 or more.

The present invention provides an electrolyte that can achieve both good low-temperature and high-temperature characteristics, and an electrolytic capacitor using the same. [Solution] An electrolyte characterized by containing 0.1 to 0.5% by weight of a uronic acid represented by formula I in a mixed solvent with γ-butyrolactone as the main solvent and ethylene glycol as a secondary solvent. Galacturonic acid and / or glucuronic acid are preferred as the uronic acid. An organic carboxylic acid or a salt thereof can be used as the solute of the electrolyte, and a linear saturated aliphatic carboxylic acid or a salt thereof with a molecular weight of 200 or more is particularly preferred. TIFF2026105971000005.tif34153

The utility model discloses an electrolytic capacitor metal shell with anti -explosion structure relates to electrolytic capacitor anti -explosion technical field, the utility model discloses an electrolytic capacitor body, electrolytic capacitor body surface fixedly connected with the fixed ring, the fixed ring top is provided with collection mechanism, the collection mechanism includes the fixed ring top fixed connection of installation ring, the collection pipe of screw thread connection in installation ring surface and is provided with the taper block of collection pipe top portion, the utility model discloses a circular ring collection pipe and the cooperation of taper block, when gas is discharged through the air -dispersing through -slot, electrolyte is intercepted storage between the liquid storage groove of collection pipe and capacitor body, and the sealing rubber strip prevents electrolyte leakage, and the cushion block ensures that the air -dispersing through -slot is unobstructed, and this movement process realizes gas -liquid separation, avoids electrolyte splash corrosion surrounding element, and also guarantees pressure quick release, and the safety and reliability of equipment are improved significantly.

An electrolytic capacitor (1) comprising a main body shell (2), a capacitor element (10), and a sealing body (5), wherein the main body shell (2) has an opening, the capacitor element (10) is housed within the main body shell (2), the sealing body (5) seals the opening of the main body shell (2), the capacitor element (10) is wound with an anode foil (11) having an oxide coating (16) on its surface and a cathode foil (12) opposite to the anode foil (11) separated by a spacer (13), and an electrolyte layer (19) is provided between the anode foil (11) and the cathode foil (12), the electrolyte layer comprising: a solid electrolyte (17) comprising a conductive polymer; and a liquid electrolyte (18) covering at least a portion of the solid electrolyte (17), the liquid electrolyte (18) comprising at least an unsaturated fatty acid salt, wherein the unsaturated fatty acid salt monomer or a mixture of unsaturated fatty acids added to the unsaturated fatty acid salt comprises more than 50% by weight of the liquid electrolyte (17).

An electrolytic capacitor 1 comprises: a body case 2 that is provided with an opening section; a capacitor element 10 that is accommodated inside the body case 2; and a sealing body 5 that seals the opening section in the body case 2. The capacitor element 10 is such that a positive electrode foil 11, which has an oxide film 16, and negative electrode foil 12, which faces the positive electrode foil 11 across a separator 13, are wound on a surface thereof, and has an electrolyte layer 19, which includes a solid electrolyte 17 containing a conductive polymer and a liquid electrolyte 18 covering at least a portion of the solid electrolyte 17, between the positive electrode foil 11 and the negative electrode foil 12. The liquid electrolyte 18 contains at least an unsaturated fatty acid salt. The unsaturated fatty acid salt alone or a mixture that is the unsaturated fatty acid salt with an unsaturated fatty acid added thereto accounts for 50 wt% or greater of the liquid electrolyte 17.

This invention relates to the field of electrode foil manufacturing technology, and particularly to a method for forming small-width electrode foil for high-density surface-mount capacitors. The method includes the following steps: S1, surface pretreatment: The aluminum foil is immersed in a diluted pretreatment solution at 60-70°C, followed by ultrasonic treatment; after washing, it is treated with pure water at 90-95°C for 12-15 minutes, and then air-dried to complete the surface pretreatment; S2, primary formation; S3, secondary formation; S4, tertiary formation. This invention provides a method for forming small-width electrode foil for high-density surface-mount capacitors to solve the problems in related technologies where high specific capacitance and low leakage current cannot be simultaneously achieved, and where bending performance is poor.

The present invention provides an electrolytic capacitor based on an n-type conductive polymer and a manufacturing process for the same. The capacitor comprises a wound body formed by laminating a negative electrode foil, electrolytic paper, and a positive electrode foil with an oxide film dielectric formed on its surface in this order and winding them together. The wound body has an n-type conductive polymer electrolyte layer inside, and the material of the n-type conductive polymer electrolyte layer contains one or more types of n-type conductive polymers, the n-type conductive polymer having repeating units of formula (I) which is a negatively charged conjugated structure as shown below, where X is one of an oxygen atom, a sulfur atom, a selenium atom, a tellurium atom, or a nitrogen atom, and when X is a nitrogen atom, R is one of a hydrogen atom, a linear alkyl, or an isoalkyl, and when X is one of an oxygen atom, a sulfur atom, a selenium atom, or a tellurium atom, R is absent, and Y + represents a cation. The conjugated repeating units of the negatively charged structure may be the same or different. The resulting capacitor has low ESR and high stability. [Formula 1] TIFF2026519187000011.tif47169

The present invention provides an electrolyte for electrolytic capacitors that can suppress the increase in leakage current in high-temperature environments without worsening yield, an electrolytic capacitor using this electrolyte, and a method for manufacturing an electrolytic capacitor. [Solution] The electrolyte for the electrolytic capacitor contains inorganic oxide colloidal particles, phosphoric acid in an amount of more than 0.1 wt% and 0.3 wt% or less relative to the total amount of the electrolyte for the electrolytic capacitor, and diethylene glycol in an amount of 14 wt% or more relative to the total amount of the solvent. The electrolytic capacitor comprises an anode body having a dielectric film formed on the surface of a foil made of a valve metal as a base material, and a cathode body, with the electrolyte for the electrolytic capacitor interposed between the anode body and the cathode body. The electrolyte for the electrolytic capacitor is prepared in advance in the electrolyte preparation step and impregnated into the element consisting of the anode body and cathode body in the impregnation step.

To provide an electrolytic capacitor that can sufficiently suppress performance degradation when used for a long period of time or when used in a high-temperature environment. [Solution] The electrolytic capacitor according to this disclosure comprises a capacitor element, a liquid component impregnated into the capacitor element, a plurality of microcapsules, and a case that houses the capacitor element, the liquid component, and the plurality of microcapsules. The capacitor element includes an anode foil having a dielectric layer, a cathode foil arranged opposite to the dielectric layer, a separator interposed between the anode foil and the cathode foil, and a conductive polymer layer interposed between the anode foil and the cathode foil and in contact with the separator. Each of the plurality of microcapsules contains a degradation prevention component, and the capsule wall of each of the plurality of microcapsules ruptures when predetermined conditions are met, releasing the degradation prevention component to the outside.

To realize a temperature detection circuit and temperature detection method that are highly sensitive and accurate, and can be supplied at low cost. [Solution] The temperature detection circuit 10CT1 according to the present invention is electrically connected to a temperature sensor having an element part 10S in which an equivalent circuit including an equivalent series resistance Rs and capacitance C is formed between a first terminal and a second terminal, and is a temperature detection circuit that outputs a detection value for detecting the ambient temperature of the temperature sensor, and is characterized by having a power supply and discharge part CTA that causes a change in the electromagnetic state in the equivalent circuit over time by charging or discharging the capacitance C through the equivalent series resistance Rs, and a detection part CTB that outputs a detection value that reflects the temperature dependence of the change in the electromagnetic state in the equivalent circuit over time due to the temperature characteristics of the equivalent series resistance Rs and capacitance C.

The present invention relates to a hybrid polymer capacitor (100) comprising several layers between an anode layer (1) and a cathode layer (6), the hybrid polymer capacitor (100) comprising a non-hydrated metal oxide layer (2) having a thickness of at least 100 nm in the stacking direction, a hydrated metal oxide layer (3) arranged on the surface of the non-hydrated metal oxide layer (2), and a liquid electrolyte having a conductivity of at least 200 μS / cm at 30° C. and a water content of at least 0.5%, the hydrated metal oxide layer and the non-hydrated metal oxide layers (2, 3) being impregnated with the liquid electrolyte.

An electrode for an electrolytic capacitor, preferably a wound electrolytic capacitor, is provided, the electrode comprising a carrier substrate and a first metallization on a first side of the carrier substrate.

The present disclosure relates to the technical field of electronic devices, and particularly to a capacitor explosion-proof device, a circuit board, and an electronic device. The capacitor explosion-proof device includes an explosion-proof casing (100), covering a top of an electrolytic capacitor (300) opposing the pins. The explosion-proof casing includes a side plate, at least one vent (111) provided on the side plate, and opposing the top. The technical solutions provided by the embodiments of the present disclosure may include following beneficial effects: avoiding spreading electrolyte solution to cause a fire, preventing the spread of fired electrolyte to a large area, and effectively reducing the probability of a fire.

This suppresses the increase in ESR of electrolytic capacitors and also suppresses the increase in leakage current. [Solution] The disclosed electrolytic capacitor comprises a capacitor element and a liquid component. The capacitor element comprises an anode having a dielectric layer on its surface and a conductive polymer compound covering at least a portion of the dielectric layer. The liquid component comprises an acid component, a base component, and a solvent. The solvent comprises an organic compound having a hydroxyl group, and the acid component comprises an organic carboxylic acid compound. The base component comprises at least one selected from the group consisting of primary amine compounds and secondary amine compounds.

To provide electrolytic capacitors, a method for manufacturing electrolytic capacitors, and holding materials that improve reliability.SOLUTION: An aluminum electrolytic capacitor has a capacitor element 10 with an anode foil and a cathode foil wound through a separator, a case 11 that houses the capacitor element, a sealing element 12 that seals the opening of the case, and a holding material 14 that is placed between the capacitor element and the sealing element and holds an antioxidant that is more easily oxidized than the sealing element.SELECTED DRAWING: Figure 2

The disclosed electrolytic capacitor comprises: a wound capacitor element formed by winding a laminate, a liquid component impregnated in the capacitor element, and a bottomed cylindrical shell housing the capacitor element and the liquid component. The laminate comprises: an anode foil having a dielectric layer on its surface, a cathode foil opposite the dielectric layer of the anode foil, a spacer between the anode foil and the cathode foil, and a conductive polymer held in the spacer. In a cross-section of the capacitor element perpendicular to the winding axis, the ratio of the combined cross-sectional area of ​​the anode foil and the cathode foil to the cross-sectional area of ​​the capacitor element is 55% or more.

A solid electrolytic capacitor that can suppress an increase of the equivalent series resistance and reduction of the capacitance under the high-temperature environment even when the solid electrolytic capacitor uses both the conductive polymer and the electrolytic solution and contains the fibrillated fiber as a separator. The solid electrolytic capacitor includes an anode body having a dielectric film, a cathode body facing the anode body, and an interlayer intervening between the anode body and the cathode body. The interlayer includes a conductive polymer, an electrolytic solution, and a separator. The separator contains the fibrillated fiber and has the air resistance of 5.8 (sec / 100mL) or less. The electrical conductivity of the interlayer is 55 (S) or more and less than 180 (S).

This invention discloses a flashover voltage booster, its preparation method, and applications, as well as an electrolyte for electrolytic capacitors. It relates to the technical field of electrolytes for high-voltage electrolytic capacitors. The preparation method includes: heating pure water to 93-97°C, adding boric acid and stirring to dissolve; adding ethyl silicate-40 dropwise at 80-90°C and reacting for 4-5 hours; adding methyltrimethoxysilane and stirring at 80-90°C for 1-1.5 hours; vacuum dehydrating at 78-82°C; adding ethylene glycol when the water content drops to 50%; further dehydrating until the water content is <3%; and cooling to obtain the flashover voltage booster. This invention utilizes the hydrolytic crosslinking of boric acid and ethyl silicate-40, end-capping with methyltrimethoxysilane to inhibit gelation and reduce viscosity, combined with staged dehydration and compatibility with ethylene glycol, to prepare a low-viscosity, highly compatible, and high-temperature stable borosilicate crosslinked booster. This significantly improves the flashover voltage and high-temperature stability of the electrolyte, with minimal impact on conductivity and ESR.

The present invention addresses the problem of providing: an electrolyte solution that is for use in a vehicle-mounted hybrid-type electrolytic capacitor which is installed in vehicle-mounted AV equipment or electrical equipment, and that is capable of maintaining low ESR at high capacitance and in high frequencies in the long term, even in harsh high-temperature environments; and a vehicle-mounted hybrid-type electrolytic capacitor that is produced using the electrolyte solution.　Provided is an electrolyte solution for use in a vehicle-mounted hybrid-type electrolytic capacitor, wherein: the vehicle-mounted hybrid-type electrolytic capacitor has, inside an outer container, a capacitor element which has a solid electrolyte layer and the electrolyte solution which is impregnated in the capacitor element; the solid electrolyte layer contains a solid electrolyte comprising a conductive polymer; the electrolyte solution contains an electrolyte, an aromatic nitro compound, and an organic solvent; the electrolyte is an acid and / or a salt; the salt comprises an acid component and a base component; the aromatic nitro compound does not have, on an aromatic ring thereof, a hydroxyl group, a carboxyl group, or an alkyl group which has an hydroxyl group; and the electrical conductivity of the electrolyte solution at 30°C is 0.05-1.0 mS / cm.