8results about How to "Increase the flash voltage" patented technology

The invention relates to a core of an aluminum electrolytic capacitor and the aluminum electrolytic capacitor comprising the core, and relates to the technical field of capacitors. The core of the aluminum electrolytic capacitor is composed of an assembly comprising a positive electrode foil, a negative electrode foil, electrolytic paper and a foil guide strip, the positive electrode foil is an aluminum foil with the purity of 99.99% or above, and the negative electrode foil is an aluminum foil with the purity of 99.5% or above. The aluminum electrolytic capacitor provided by the invention comprises the core provided by the invention. The aluminum electrolytic capacitor disclosed by the invention not only can stably work under a rated working voltage for a long time, but also can continuously and stably work under an overvoltage working condition within a short time, and has a good industrial application prospect.

The application provides an anode foil and a preparation method thereof. The preparation method comprises the following steps: providing an unformed foil, wherein the unformed foil comprises an aluminum foil base material and an aluminum powder sintering layer arranged on the surface of the aluminum foil base material; and sequentially performing the following processes on the unformed foil: water boiling, first-stage chemical conversion, second-stage chemical conversion, third-stage chemical conversion, power feeding treatment, fourth-stage chemical conversion, fifth-stage chemical conversion, first-stage heat treatment, first chemical conversion repair, first phosphoric acid treatment, second chemical conversion repair, second-stage heat treatment, third chemical conversion repair and second phosphoric acid treatment. The solutes of the electrolyte of the first-stage chemical conversion, the second-stage chemical conversion and the third-stage chemical conversion comprise citric acid, triammonium citrate, adipic acid, ammonium adipate, salicylic acid, hypophosphite, boric acid and ammonium salt, and the solvent is water. The solutes of the electrolyte of the fourth-stage chemical conversion and the fifth-stage chemical conversion comprise citric acid, triammonium citrate, sebacic acid, ammonium sebacate, salicylic acid, sodium hypophosphite, boric acid and ammonium salt, and the solvent is water. An anode foil prepared by the preparation method has a high specific capacity and a small hydration leakage current.

The invention discloses a high-reliability liquid capacitor and a preparation method thereof, and relates to the technical field of electrolytic capacitors. The high-reliability liquid capacitor comprises a core package and an aluminum shell, the core package comprises an anode foil, a cathode foil, an electrolyte solution and electrolytic paper, the preparation method comprises the steps of formation, winding compounding, liquid immersion, vacuum heat sealing and cooling solidification, and the prepared liquid capacitor is high in sparking voltage, low in generated leakage current and long in service life.

The invention discloses an aluminum electrolytic capacitor and a manufacturing method thereof. The manufacturing method comprises the following steps: Step S1, making a core package, the specific capacitance of the anode foil is 0.67-0.70 μF / cm 2 , thickness 110-125 μm, specific volume discrete rate ≤10%, tensile strength ≥16.7 N / cm; step S2, drying treatment; step S3, electrolyte impregnation: immerse the core package dried in step S2 into the electrolyte for impregnation treatment, the electrolyte is composed of the following components by mass percentage: main solvent 45%-68%, auxiliary solvent 15%-25%, solute 8%-15%, additive 5%-12%, getter 0.8%-2%, repair agent 0.3%-1%; step S4, heating polymerization; step S5, packaging step: put the core package polymerized in step S4 into the shell and seal it with a rubber plug; after sealing, the height between the top of the waist groove on the shell and the top of the curling edge is controlled at 4.0±0.3 mm, and the glue insertion depth of the curling edge is 40%-60% of the thickness of the rubber plug; step S6, aging step. The aluminum electrolytic capacitor of the present invention not only reduces leakage current and product loss, but also improves the product's ability to withstand large ripple currents.

The invention discloses an electrolyte for an electrolytic capacitor, and the electrolyte comprises the following components in parts by mass: 60-80 parts of a solvent, 15-25 parts of a solute, 0.1-0.5 part of a waterproof mixture, 0.1-0.5 part of a hydrogen eliminating agent, and 0.5-2 parts of a sparking voltage boosting agent. Wherein the sparking voltage boosting agent comprises polyhydroxy polycarboxyl organic acid and plasma treatment silicon carbide. On the basis of not introducing other organic matters to modify the silicon carbide, the silicon carbide is subjected to plasma treatment, and in the plasma strengthening process, high-energy plasma can interact with the surface of the silicon carbide to form a special structure and a special chemical state on the surface of the silicon carbide, so that the surface performance of the silicon carbide is improved. Results show that plasma treated silicon carbide and polyhydroxy polycarboxyl organic acid have a good synergistic effect, the sparking voltage of the electrolyte is improved, and the service life of a capacitor is prolonged.

The application discloses a kind of low ESR wide temperature range aluminum electrolytic capacitor and preparation method thereof, first to anode foil multistage corrosion treatment, then preparation electrolyte, then the positive pole foil strip and negative pole foil strip are riveted on anode foil and cathode foil respectively, then electrolytic paper is intervened between anode foil and cathode foil and is wound into element, then the element obtained by winding is dried, then the element after drying is immersed in electrolyte and is immersed, then the element after immersion is loaded into aluminum shell and is sealed, finally the capacitor after packaging is aged treatment;The electrolyte is composed of the following mass percentage components: solvent 40-60%, solute 30-50%, additive 3-10%;The additive is composed of the following mass percentage components: alkyl phosphate 30-55%, mannitol 20-40%, monobutyl phosphate 15-25%, aminoacetic acid 1-5%.The aluminum electrolytic capacitor provided by the application has low ESR, high flashover voltage and good low-temperature performance, and is suitable for high-end data center power supply and AI server power supply.

The invention relates to the technical field of electrolyte, and discloses a high-voltage aluminum electrolytic capacitor which comprises a shell, an anode foil is fixedly connected to the left side of the upper end of the shell, a cathode foil is fixedly connected to the right side of the upper end of the shell, a contact opening is fixedly connected to the middle of the upper end of the shell, and a battery cell is fixedly connected to the middle of the lower end of the contact opening. A wrapping layer is arranged on the outer side of the battery core, and a film II is arranged in the middle of the outer side of the wrapping layer. When the electrolyte in the high-voltage aluminum electrolytic capacitor is used, personnel need to prevent external halogen from entering the interior, and at the moment, the personnel can add n-hexane and tetrahydrofuran into the interior, so that an internal gasket and an electrical core can be wrapped, the external halogen entering the interior can be reduced, and the service life of the high-voltage aluminum electrolytic capacitor is prolonged. The corrosion of the aluminum electrolytic capacitor can be reduced, and the conductivity of the electrolyte can be improved while the sparking voltage of the electrolyte is improved, so that the service life of the aluminum electrolytic capacitor is prolonged.

The present invention discloses an electrolyte for an electrolytic capacitor, wherein the electrolyte comprises, by mass, 60 to 80 parts of a solvent, 15 to 25 parts of a solute, 0.1 to 0.5 parts of a waterproof mixture, 0.1 to 0.5 parts of a hydrogen remover, and 0.5 to 2 parts of a flash voltage enhancer; wherein the flash voltage enhancer comprises a polyhydroxy polycarboxyl organic acid and plasma-treated silicon carbide. The present invention performs plasma treatment on silicon carbide without introducing other organic substances to modify silicon carbide. During the plasma strengthening process, high-energy plasma can interact with the surface of silicon carbide to form a special structure and chemical state on the surface of silicon carbide, thereby improving the surface properties of silicon carbide. The results show that plasma-treated silicon carbide and polyhydroxy polycarboxyl organic acids have a good synergistic effect, which improves the flash voltage of the electrolyte and the life of the capacitor.