1216results about "Electrolytic capacitor manufacture" patented technology

The invention provides an anode foil and a preparation method thereof, and relates to the technical field of capacitors. The preparation method comprises the following steps: preparing mixed aluminum slurry which comprises spherical aluminum powder, spherical aluminum oxide powder, a solvent, a binder and a dispersing agent; coating the surface of an aluminum foil substrate with the mixed aluminum slurry, and drying the aluminum foil substrate containing the mixed aluminum slurry to obtain a powder layer aluminum foil blank; sintering the powder layer aluminum foil green body to obtain a sintered foil; performing shot blasting treatment on the sintered foil to obtain an initial anode foil; cleaning and boiling the initial anode foil; and performing formation treatment on the boiled initial anode foil to obtain a target anode foil. According to the preparation method disclosed by the invention, the bending strength of the anode foil can be improved, and large-scale application of the anode foil can be realized.

The invention relates to an electrode preparation method, an electrode prepared by the method, an energy storage device comprising the electrode and an electrode production system for carrying out the method. The preparation method comprises the following steps: (a) providing a self-supporting electrode film which comprises a first side and a second side opposite to the first side, and the second side comprises a to-be-deposited area on which metal is deposited when the self-supporting electrode film is in contact with an electrolyte for an electrodeposition reaction; (b) providing an electrolyte containing a salt of a metal to be deposited; and (c) contacting at least the region to be deposited of the second side of the self-supporting electrode film with the electrolyte, and performing an electrodeposition reaction in the region to be deposited, thereby depositing a current collector of the metal to be deposited on the second side, where the electrodeposition temperature is 0 to 70 DEG C. According to the electrode prepared by the method disclosed by the invention, the active substance in the electrode has excellent first discharge specific capacity, first coulombic efficiency and cycle performance.

The invention relates to the technical field of power electronic components, and discloses a high-temperature-resistant electrolytic capacitor which comprises the following components in parts by weight: 80-90 parts of a graphene or carbon nanotube coating used for preparing an electrolytic capacitor shell; the invention further provides a preparation method of the high-temperature-resistant electrolytic capacitor, and the preparation method comprises the following steps: heat conduction optimization design: simulating a temperature field of the electrolytic capacitor through an unsteady-state heat conduction equation, optimizing a heat dissipation path of the electrolytic capacitor, and improving the heat dissipation performance of the electrolytic capacitor; and heat can be uniformly conducted to an external heat dissipation device. By introducing the microencapsulated phase change material, the graphene coating and the accurate temperature sensor array and optimizing heat dissipation design, efficient heat dissipation, temperature balance and long-term stability of the electrolytic capacitor in a high-temperature environment are achieved, the working performance of the electrolytic capacitor is remarkably improved, and the service life of the electrolytic capacitor is remarkably prolonged.

The invention provides a preparation method of a sintered anode foil, the sintered anode foil and an aluminum electrolytic capacitor, and the preparation method comprises the following steps: (1) mixing a dispersant and a binder, fully dissolving, adding aluminum powder, and uniformly dispersing to obtain slurry; the binder comprises at least one of aliphatic polycarbonates shown in the following general formula I: # imgabs0 #, m is an integer from 1 to 10, and n is an integer from 100 to 2000; (2) respectively coating two sides of a base material foil with the slurry, and drying to obtain a coated foil; (3) sintering the coated foil to obtain a sintered foil; and (4) forming the sintered foil to obtain the sintered anode foil. According to the preparation method disclosed by the invention, the aliphatic polycarbonate as shown in the general formula I is used as a binder, has a relatively good dispersion effect on micron-sized aluminum powder, and is easier to remove in a sintering stage, so that the sintered anode foil with low carbon residue and leakage current is prepared, and the preparation energy consumption is reduced.

A solid electrolytic capacitor according to one aspect of the present disclosure includes: an anode body made of a valve metal; a dielectric layer formed on the anode body; and a solid electrolyte layer formed on the dielectric layer. The solid electrolyte layer includes: a first conductive polymer layer formed on the dielectric layer and heterogeneously doped with a monomolecular dopant; a block layer formed on the first conductive polymer layer; and a second conductive polymer layer formed on the block layer and composed of a self-doped-type conductive polymer containing a plurality of side chains containing a functional group that can be doped. The block layer blocks a migration of the self-doped-type conductive polymer from the second conductive polymer layer into the first conductive polymer layer and / or a migration of the self-doped-type conductive polymer from the second conductive polymer layer into pores of the porous anode body.

According to the preparation method for the positive electrode material of the aluminum electrolytic capacitor, the base material aluminum foil is not fully coated with the aluminum powder slurry, but blank areas are reserved on the left side and the right side, the blank areas are coated with a layer of anti-sticking slurry containing oxide particles or ceramic particles with the melting point higher than that of aluminum, and the melting point of the particles is higher than that of the aluminum; diffusion among aluminum atoms can be effectively blocked, an anti-sticking layer is formed, and adhesion between adjacent aluminum foil layers is prevented; due to the use of the anti-sticking slurry, the adhesive force between the aluminum foil layers is reduced, so that the occurrence of tearing and wrinkling in the processes of coil dividing, sintering, formation and subsequent treatment is reduced, the reliability of the aluminum electrolytic capacitor is improved, and the service life of the aluminum electrolytic capacitor is prolonged; according to the anti-adhesion sintered foil manufactured through the method, the width of the blank area is preferably 5-20 mm, and the design guarantees the sufficient anti-adhesion effect and does not affect the effective use area of the aluminum foil.

The invention relates to the field of paper for aluminum electrolytic capacitors, and discloses a preparation method of a high-liquid-absorption high-voltage electrolytic capacitor diaphragm. The whole diaphragm is prepared from high-beating-degree and high-purity insulating softwood pulp, so that high unit thickness voltage resistance can be ensured. The adopted preparation method is a continuous drying mode, the drying efficiency is higher than that of a gap drying mode, after the fibers are formed through a fourdrinier wire, heating drying is firstly adopted, and then freezing decompression drying is adopted, so that fine pore structures among the fibers can be effectively increased, the high voltage resistance of the diaphragm is reserved, and the liquid absorption performance of the diaphragm is also greatly improved; therefore, ion moving resistance is reduced and diaphragm internal resistance is reduced.

The invention discloses a chip tantalum capacitor and a packaging method thereof, the capacitor comprises a lead frame and a tantalum core, and the lead frame is connected with the tantalum core through a connecting part. The packaging method comprises the following steps: correspondingly connecting a lead frame, a connecting part and a tantalum core, and then coating a water-soluble polymer material on the connecting part; putting into a mold for mold pressing; soaking in water after mould pressing, taking out, washing and drying; and carrying out electroplating treatment to finish packaging of the tantalum capacitor. According to the invention, a layer of water-soluble polymeric membrane material is coated on the positive and negative electrode lead wire areas of the lead wire frame; the water-soluble polymer material has good adhesion and peelability, so that the epoxy mould pressing flash material can be effectively prevented from being tightly attached to the lead frame in the mould pressing process, the epoxy mould pressing flash material is effectively removed, particularly the flash material is prevented from being tightly attached to the lead frame, the production quality and the product performance are improved, and the production cost is reduced. And the step of treating the flash is omitted.

The invention relates to the technical field of capacitor electrolyte manufacturing, in particular to an ultrahigh-conductivity capacitor electrolyte formula and a preparation method thereof.The ultrahigh-conductivity capacitor electrolyte formula comprises a main solvent, a solute and an additive, an organic solvent in the main solvent and a low-viscosity organic solvent are mixed according to a specific proportion, the dielectric property and the ion migration environment of the solvent can be effectively balanced, and the conductivity of the capacitor is improved; and a good condition is created for ion transmission. And through reasonable matching and concentration control of high-dissociation-degree salts and organic salts in solutes, sufficient dissociation and efficient transmission of ions are ensured, and the conductivity of the electrolyte is greatly improved. A plurality of additives are added according to a specific proportion and properties, the conductivity enhancing additive forms a conductive network, the electrode protection additive forms a uniform protection film on the surface of an electrode to improve the interface stability, the electrolyte stabilizing additive inhibits decomposition and oxidation reactions in a wide temperature range, and stable performance and high conductivity of the electrolyte are guaranteed through a synergistic effect.

The invention discloses a high-adhesion solid-state capacitor carbon foil production process, and relates to the technical field of solid-state capacitor carbon foils. The preparation method comprises the following steps: generating a three-dimensional graphene layer in situ on the surface of an aluminum foil by a chemical vapor reduction method; secondly, the graphene layer is modified by utilizing aluminum nitrate ammonium nitrate, and then the Ni-Al layer with a continuous lamellar structure is prepared on the graphene layer through electrochemical deposition, so that active sites are provided, and the ion diffusion capability of the carbon foil is remarkably improved; finally, mixing ethylene diamine tetraacetic acid dipotassium salt and corn starch to prepare nitrogen-doped carbon aerogel, preparing the nitrogen-doped carbon aerogel into powder, and coating the surface of the Ni-Al layer with the powder to prepare a four-layer composite carbon foil; by doping nitrogen atoms, the surface chemical performance of the carbon aerogel material can be changed, the wettability of an electrode is improved, the diffusion rate of electrolyte ions is increased, and the specific capacity of the material is increased, so that the overall electrochemical performance of the carbon foil is improved. The four-layer composite carbon foil prepared by the invention has the effects of high adhesion and excellent electrochemical performance.

The present invention discloses a negative pressure packaging method for aluminum electrolytic capacitors, comprising: inserting a core into a sealing body. Placing the core, the sealing body and the outer shell in the inner cavity of a receiving mechanism, and sealing the receiving mechanism. Evacuating the inner cavity of the receiving mechanism so that the inner cavity of the receiving mechanism is in a negative pressure state. The sealing body and the outer shell are packaged so that the sealing body is located at a first depth of the outer shell. The sealing body and the outer shell are pressed together so that the sealing body is located at a second depth of the outer shell, and the second depth is closer to the bottom of the outer shell relative to the first depth. The method solves the problem of the sealing body sliding too long on the inner wall of the outer shell in the prior art, avoids overheating of the friction surface of the sealing body and slight melting, and can ensure that the outer diameter of the sealing body will not shrink, thereby ensuring the airtightness of the outer shell and the sealing body, realizing the negative pressure packaging of the aluminum electrolytic capacitor, improving the stability of the product and increasing the service life of the product.

The invention discloses a block anode for an aluminum electrolytic capacitor and a preparation method of the block anode, and belongs to the technical field of aluminum electrolytic capacitors, and the preparation method of the block anode for the aluminum electrolytic capacitor comprises the following steps: uniformly mixing dielectric substance coated aluminum powder, a binder and a solvent to obtain slurry, and drying the slurry to remove the solvent in the slurry to obtain mixed powder; the dielectric constant of the dielectric substance is greater than that of aluminum oxide; and briquetting and shaping the mixed powder to obtain a block, degreasing the block in an oxygen-containing atmosphere, and sintering in an oxygen-free atmosphere to obtain the block anode for the aluminum electrolytic capacitor. A later-stage anode cutting process is reduced through a block type integrated forming technology, and the problem that edge burrs are generated due to shearing friction between a metal cutter and anode foil is solved fundamentally. The dielectric constant of the block type anode dielectric layer is increased by introducing the dielectric substance, and the problem of low capacity of the anode foil of the aluminum electrolytic capacitor is solved.

The invention discloses an aluminum electrolytic capacitor special for an electric tool and a preparation method of the aluminum electrolytic capacitor. The method comprises the following steps that a positive electrode guide pin and a negative electrode guide pin are riveted to an anode foil and a cathode foil respectively; placing electrolytic paper between the anode foil and the cathode foil, and winding to form a core package; carrying out baking drying and electrolyte impregnation treatment on the wound core package, and then carrying out packaging and aging; the electrolyte consists of the following components in percentage by mass: 45-60% of a solvent, 25-40% of a solute, 5-15% of an additive and 5-10% of a stabilizer, the solute contains 2-butyl suberic acid; the stabilizer contains alkyl phosphate. According to the preparation method of the aluminum electrolytic capacitor special for the electric tool, the electrolyte formula is optimized, oxidation hydrolysis of the electrode foil and the oxidation film is effectively inhibited, the ion migration resistance is reduced, the polarization phenomenon is reduced, the loss value and the equivalent series resistance (ESR) of the obtained capacitor are remarkably reduced, the ripple resistance is improved, and the aluminum electrolytic capacitor is suitable for the electric tool.

Provided is a conductive polymer solution capable of providing an electrolytic capacitor having high capacity and exhibiting low ESR characteristics. A conductive polymer solution having a pH of 1.5-5.0 is used, the solution containing 0.01-10% by mass of a polythiophene (A) containing at least one type of structural unit selected from the group consisting of structural units represented by general formula (1) and structural units represented by general formula (2), 0.001-20% by mass of an epoxy compound (B) having at least two or more epoxy groups, and water. In general formulae (1) and (2), R2 represents a hydrogen atom, a methyl group, an ethyl group, a C3-6 linear or branched alkyl group, or a fluorine atom, m represents an integer of 1-10, and n represents 0 or 1. ] # imgabs0 #

The invention discloses a sealing structure for an electrolytic capacitor, and relates to the technical field of electrolytic capacitors, the sealing structure comprises a capacitor fixing mechanism and a lifting support rod installed at the bottom of the capacitor fixing mechanism, the top of the capacitor fixing mechanism is provided with a sealing mechanism, and the bottom of the sealing mechanism is provided with a moving disc. The capacitor fixing mechanism comprises a workbench, a fixing ring is fixedly installed on the top of the workbench, a first rotating motor is installed on one side of the interior of the fixing ring, the output end of the first rotating motor is fixedly connected with a rotating main bevel gear, and the top of the rotating main bevel gear is connected with a meshing gear ring in a meshing mode. An adjusting knob is rotated to drive an inclined threaded rod to rotate, so that an inclined threaded sleeve drives a second support and an inclined rotating rod to rotate, the inclination angle of an inclined guide plate can be adjusted, and when the electrolytic capacitor is sealed, a capacitor end cover can be secondarily extruded and fixed through a clamping sliding rod.

A core package includes N cores, N+1 hollow-square-shaped thin plates, a first substrate and a second substrate. The N+1 hollow-square-shaped thin plates and the N cores are stacked alternately to form a semi-finished core package. Anode portions of adjacent two cores are electrically connected, and cathode portions of adjacent two cores are electrically connected. When stacking the N+1 hollow-square-shaped thin plates and the N cores, a space where the N+1 hollow-square-shaped thin plates are not in contact with the N cores is filled with an insulating adhesive. A double-substrate multilayer solid aluminum electrolytic capacitor includes a resin shell, a waterproof coating and the core package. This application also provides a method of preparing the double-substrate multilayer solid aluminum electrolytic capacitor.

The invention discloses a special aluminum fixing capacitor for an electronic detonator with ultralow electric leakage characteristic and a preparation method thereof, the capacitor comprises a positive foil electrode, a negative foil electrode, an aluminum foil or an aluminum alloy foil coated with an oxide film on the surface, electrolytic paper and an electrolyte, and the electrolyte can be a phosphate-based electrolyte, a borate-based electrolyte or an organic electrolyte containing high-conductivity salt, and an additive, the preparation method comprises the following steps: slitting positive and negative foils and electrolytic paper, winding the positive and negative foils and the electrolytic paper to form a concentric circle, forming a repair oxide film, dipping a conductive polymer material, baking and polymerizing to form a conductive film, injecting a pouring sealant into an aluminum shell, and carrying out heat treatment to obtain the conductive aluminum shell. The formation liquid is ammonium dihydrogen phosphate, ammonium adipate or boric acid aqueous solution, and the pouring sealant is epoxy resin or polyurethane; the capacitor has an ultra-low electric leakage characteristic, is suitable for being used as a power supply energy storage element in an electronic detonator system, stabilizes power supply output and inhibits an electric leakage phenomenon.

The invention discloses a film for preventing a capacitor core from being damaged and a method for aging by adopting the film, which can effectively isolate the core with large leakage current in time, do not need a specially-assigned person to find and remove the capacitor core with large leakage current, and improve the production efficiency by 50%. And the core is prevented from burning to influence the surrounding core as shown in the figure, so that the product percent of pass can be effectively improved by 12%. Compared with the prior art, the efficiency is improved by 50%, the product percent of pass is improved by 12%, and the method is simple, easy to operate and remarkable in effect.

An ammonium acetate selected from the group of pentylammonium acetate, phenylethylammonium acetate, 2-([1,1′-biphenyl]-4-yl) ethan-1-amine acetate, butanammonium acetate, hexylammonium acetate, octylammonium acetate, phenylbutanammonium acetate, and any combination thereof, is used to modify a perovskite layer in a perovskite solar cell. A perovskite solar cell includes a perovskite layer and an interface modification layer that is in contact with the perovskite layer and includes at least one ammonium acetate provided herein. A method of preparing the inverted perovskite solar cell.

A solid electrolytic capacitor that includes an anode body having a porous part on surface thereof and a manufacturing method thereof including a step (i) of forming a first solid electrolyte layer on a dielectric layer and a step (ii) of forming a second solid electrolyte layer on the first solid electrolyte layer. The first and second solid electrolyte layers contain first and second conductive polymers, respectively. The step (i) includes a step (i-a) of supplying a reaction solution containing a monomer and a silane compound to the surface of the dielectric layer, and a step (i-b) of forming the first solid electrolyte layer by polymerizing the monomer in the supplied reaction solution to form the first conductive polymer. The monomer contains a compound represented by the following formula (I) (in the formula (I), R represents an alkyl group whose carbon number is within a range of 1 to 10).

To allow attachment of electrolytic capacitors and other relatively large electrical circuit devices to a PCB while meeting size limitations, The PCB can include a full-through opening within which the device can be located. Along one edge of the opening, the PCB includes half-through cuts with a conductive lining extending from the opening, where the pins of the capacitor or other device can rest and form electrical connections. In addition to pins extending radially from one end of the capacitor or other device, the device includes a notch extending from the opposing end. Along the edge of the PCB opening opposing the half-through cuts for the pins, the PCB includes a half-though cut for the device's notch to rest, thereby providing mounting stability.

The invention relates to a preparation method of a sintering type aluminum electrolytic capacitor anode foil with controllable carbon content. The preparation method comprises the following steps: mixing aluminum powder, an adhesive, an additive, a composite carbon source and a solvent to obtain aluminum powder slurry; and coating the aluminum powder slurry on a base material to obtain an aluminum foil, and carrying out gradient temperature control sintering. The invention further relates to the carbon-content-controllable sintering type aluminum electrolytic capacitor anode foil prepared through the method. The gradient doping of the carbon source is carried out by compounding the carbon source and gradient temperature control sintering, so that the accurate control of the carbon content is realized, a uniform conductive network is formed, and the reduction of the leakage current and the increase of the mechanical strength are realized.

The invention discloses a high-performance electrode foil and a sintering process thereof. The sintering process comprises the following steps: carrying out hydration treatment on an aluminum-containing interlayer foil to obtain a hydrated interlayer foil; winding the base layer foil and the hydrated interlayer foil at intervals to form a foil roll; and sintering the foil roll. The adopted interlayer foil is the aluminum-containing interlayer foil, and when the aluminum-containing interlayer foil is subjected to hydration treatment, hydrated aluminum hydroxide can be formed on the surface of the aluminum-containing interlayer foil; when sintering is carried out, on one hand, hydrated aluminum hydroxide on the surface of the hydrated interlayer foil can be decomposed, generated water can react with aluminum powder on the surface of the base layer foil at a high temperature, aluminum oxide and hydrogen are generated, and therefore the purposes of promoting the aluminum powder on the surface of the base layer foil to generate aluminum oxide and promoting the sintering process are achieved, and aluminum powder oxidation is more uniform; and on the other hand, generation and decomposition of aluminum hydroxide can cause a large number of pores to be generated in the interlayer foil, so that the adhesive gasified from the base layer foil is better adsorbed, adhesive discharging is more complete, and improvement of the performance of the electrode foil is facilitated.

A solid electrolytic capacitor includes: a capacitor element including an anode part and a cathode part; a substrate that supports the capacitor element; a sealing body that seals the capacitor element; a first external electrode electrically connected to the anode part; a second external electrode electrically connected to the cathode part; and an adhesive layer disposed between the capacitor element and a first surface of the substrate. At an interface between the first surface and the adhesive layer, a maximum height Rz1 of surface roughness of the first surface is 5 μm or more, and a maximum height Rz2 of surface roughness of the adhesive layer is 3 μm or more.

The invention discloses a method for manufacture sintered anode aluminum foil. Ultrasound was used to change the stacking structure of aluminum powder on the surface of the anode aluminum foil, allowing aluminum powder particles of different sizes to form a gradient distribution in the thickness of the aluminum powder layer, with a gradual decrease in average particle size from bottom to top, larger voids in the lower layer, and denser and larger surface area in the upper layer. Therefore, the specific capacitance and the withstand voltage were improved. By introducing ultrasonic vibration, this invention can simultaneously enhance the specific capacitance and withstand voltage of anode aluminum foil after high-temperature sintering and anodizing, while traditional sintering methods cannot obtain high specific capacitance and withstand voltage performance simultaneously.

A method for producing an electrolytic capacitor, the method including steps of: preparing an electrode foil; preparing a first conductive polymer dispersion containing a first conductive polymer component and a first dispersion medium; forming a first conductive polymer layer containing the first conductive polymer component, by applying the first conductive polymer dispersion to a surface of the electrode foil by a coating method, and then at least partially removing the first dispersion medium; and fabricating a capacitor element, using the electrode foil having the first conductive polymer layer.

The invention discloses an aluminum electrolytic capacitor foil prepared from porous aluminum powder, which is a three-dimensional porous aluminum electrode foil, the three-dimensional porous aluminum electrode foil is formed by high-temperature sintering of a foil material consisting of a base layer aluminum foil and a mixture coated on the surface of the base layer aluminum foil, and the mixture is formed by uniformly mixing large-particle porous aluminum powder, small-particle aluminum powder, a binder and a solvent. The invention also discloses a preparation method of the aluminum electrolytic capacitor foil prepared from the porous aluminum powder, which comprises the following steps: S1, stirring the large-particle aluminum powder, 3-30% of hydrogen peroxide and 1-10% of sodium hydroxide solution at the constant temperature of 35-55 DEG C to react, filtering, washing and drying to obtain the large-particle porous aluminum powder; s2, uniformly mixing the large-particle porous aluminum powder, the small-particle porous aluminum powder, the binder and the solvent, coating the surface of the base layer aluminum foil with the mixture, and drying and curing; and S3, sintering the heated and cured foil at high temperature to form the three-dimensional porous aluminum electrode foil. The specific surface area of the powder can be increased through aluminum powder pore forming, and improvement of the foil capacity is facilitated.

The invention provides a formed foil and a preparation method thereof. The preparation method of the formed foil comprises the following steps: carrying out pretreatment on an aluminum foil, namely carrying out at least one high-temperature treatment and acid treatment on the aluminum foil; and carrying out multi-stage formation treatment on the pretreated aluminum foil. According to the invention, the hydration resistance of the formed foil can be improved, and the reliability and stability of the aluminum electrolytic capacitor can be improved.

The invention discloses an impregnation preparation method of a hybrid aluminum electrolytic capacitor, and relates to the technical field of capacitors. The method at least comprises the following steps: soaking corroded anode aluminum foil and cathode aluminum foil with citrate; placing electrolytic paper between the anode aluminum foil and the cathode aluminum foil and winding the electrolytic paper into a core package; at least one half of the volume of the core package is immersed in an impregnation liquid from one end for first impregnation treatment, then the core package is inverted, and at least one remaining half of the volume of the core package is immersed in the impregnation liquid from the other end for second impregnation treatment; carrying out drying treatment on the core package subjected to the second impregnation treatment; and carrying out assembling and aging treatment on the dried core cladding, an aluminum shell and a leather plug to obtain the hybrid aluminum electrolytic capacitor. Through the impregnation preparation method of the hybrid aluminum electrolytic capacitor provided by the invention, the impregnation time is greatly shortened, the impregnation efficiency and consistency are improved, and the performance of the capacitor is improved.

Calendering methods that accurately and / or precisely calender dry electrode films, and systems thereof, are described. The methods and systems are able to control the calendering nip and / or calendering distance between the calendering rollers with and / or without the presence of an electrode film and / or electrode powder mixture such that the variation of the calendering distance is reduced.