CN108231420B - Quick-charging aluminum electrolytic capacitor and preparation method thereof - Google Patents
Quick-charging aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- CN108231420B CN108231420B CN201810039453.3A CN201810039453A CN108231420B CN 108231420 B CN108231420 B CN 108231420B CN 201810039453 A CN201810039453 A CN 201810039453A CN 108231420 B CN108231420 B CN 108231420B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G9/02—Diaphragms; Separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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 OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
Abstract
A quick charging aluminum electrolytic capacitor comprises a shell, a core cladding and a rubber plug, wherein an insulating film is generated on the inner wall of the shell; two side edges of the negative electrode foil are positioned at the inner sides of two side edges of the positive electrode foil, and two side edges of the electrolytic paper extend out of two side edges of the positive electrode foil; an explosion-proof groove is formed in the inner shell surface of the bottom of the shell, a layer of packing paper is arranged between the bottom of the core bag and the explosion-proof groove, and one or more layers of transparent adhesive tapes are wound on the outermost layer of the core bag; the surface of the shell at the bottom of the shell is smooth and is printed or pasted with a layer of marking film; the liquid comprises a solution system
And solution system
(ii) a Solution system
Contains 2 to 15 mass percent of carbon nano tubes. The electrolyte of the quick-charging aluminum electrolytic capacitor has high ionic conductivity and small impedance, so that the heating of the capacitor during large-current charging can be reduced. Meanwhile, the dislocation arrangement of the two side edges of the positive foil, the negative foil and the electrolytic paper can ensure the stability of the capacitor.
Description
Technical Field
The invention relates to a capacitor, in particular to a quick-charging aluminum electrolytic capacitor and a preparation method thereof.
Background
The aluminum electrolytic capacitor is mainly used for filtering, bypassing and coupling, and has certain current impact resistance. However, in the background of the present fast-paced life, the ability to charge quickly has become a trend in the development of various products. However, in general, under the condition of large current impact, instantaneous and severe heating occurs to cause internal flash fire or explosion failure of the explosion-proof valve of the capacitor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a quick-charging aluminum electrolytic capacitor which can be quickly charged and has good stability and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a quick-charging aluminum electrolytic capacitor comprises a shell, a core bag and a rubber plug, wherein the core bag is sealed in the shell through the rubber plug after being impregnated with electrolyte; an insulating film is generated on the inner wall of the shell; the core bag is formed by winding a positive electrode foil, a negative electrode foil and electrolytic paper, wherein two side edges of the negative electrode foil are positioned at the inner sides of two side edges of the positive electrode foil, and two side edges of the electrolytic paper extend out of two side edges of the positive electrode foil; an anti-explosion groove is formed in the inner shell surface of the bottom of the shell, the anti-explosion groove is opposite to the bottom of the core bag, a layer of packing paper is arranged between the bottom of the core bag and the anti-explosion groove, one or more layers of transparent adhesive tapes are wound on the outermost layer of the core bag, and the transparent adhesive tapes fill the outer side surface of the core bag; the surface of the shell at the bottom of the shell is flat and is printed or stuck with a layer of identification film. In the invention, the internal structure of the capacitor is newly designed. In the present invention, if the housing is an aluminum housing, the insulating film of the inner wall of the housing may be aluminum oxide; or an insulating film formed by forming an alumina insulating film and then coating; if the shell is made of materials other than aluminum, an insulating film is coated or plated on the inner wall of the shell.
In the invention, the explosion-proof groove is arranged inside the shell, so that the outer side surface of the bottom of the shell is a flat surface, and a layer of identification film is pasted on the bottom of the shell for identifying information of a product. The information of the traditional capacitor product, such as the positive pole mark, the negative pole mark, the capacity, the manufacturer and the like, is printed or plated on the outer side surface of the bottom of the shell in the form of a film. After the capacitor is welded on the circuit board, the product information mark is positioned at the tail part of the capacitor, so that the product information mark can be directly seen, and the capacitor is very convenient; especially when the circuit board is tested and the capacitors with different specifications need to be replaced.
In the invention, the packing paper can separate the explosion-proof groove from the core bag, so that the smoothness degree of the groove body edge of the explosion-proof groove can reduce the requirement, and the shell is convenient to process. The bottom of the core bag is not scratched by the groove body under the action of the packing paper, and the capacitor can play a certain buffering role when the capacitor explodes, so that the electrolyte is prevented from being directly sprayed onto the circuit board to damage the circuit board.
In the invention, the transparent adhesive tape fills the outer side surface of the core package, so that the transparent adhesive tape can play a good role in protecting the core package during production and prevent the core package from being damaged due to collision during impregnation and assembly.
The electrolyte comprises a solution system
And solution system
Said solution system
And solution system
The weight mixing ratio of the components is 1:4-7: 3; the solution system
The carbon nano tube with the mass percent of 2 percent to 15 percent is contained; the solution system
Comprises 85 to 95 percent of polymerized monomer, 2 to 20 percent of cross-linking agent and 0.1 to 10 percent of thermal initiator, wherein the thermal initiator comprises one or more of hydrogen peroxide, persulfate and hydroperoxide; the polymerized monomer is acrylic acid and derivatives thereof.
In the invention, the carbon nano tube is prepared by using concentrated sulfuric acid: solution treated modified carbon nanotubes of concentrated nitric acid =3: 1.
In the present invention, the crosslinking agent comprises one or more of 2-ethylhexyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, and methyl methacrylate; the polymeric monomer comprises one or more of acrylic acid, polyacrylic acid, methyl acrylate, isobutyl acrylate and ethyl methacrylate.
In the present invention, the solution system
Also comprises 45 to 65 percent of main solvent, 15 to 25 percent of auxiliary solvent, 8 to 25 percent of main solute, 2 to 5 percent of auxiliary solute and 0.5 to 3 percent of additive; the main solvent may be ethylene glycol, and the auxiliary solvent includes one or more of water, glycerin, glycerol, propylene glycol, and 1, 4-butylene glycol.
In the invention, the main solute comprises one or more of succinic acid, glutaric acid, adipic acid, ammonium adipate, ammonium suberate, ammonium azelate, ammonium sebacate, ammonium 1, 7-sebacate, ammonium isosebacate, ammonium alkyl sebacate, ammonium dodecadioate and 2-hexyl adipic acid; the secondary solute comprises one or more of boric acid, polyvinyl alcohol, polyethylene glycol, butyl phosphate, monobutyl phosphate, ammonium pentaborate, phthalic acid, terephthalic acid and citric acid.
In the invention, the additive comprises nitro compounds, including one or more of p-nitrophenol, o-nitrophenol, m-dinitrobenzene, p-nitroanisole or p-nitrobenzyl alcohol and ammonium hypophosphite.
The thermal initiator used by the invention is water-soluble, inorganic and medium-temperature, can be uniformly dissolved in the solvent of the electrolyte, can obtain uniform gel-state electrolyte, and effectively avoids the risks of insufficient local polymerization, internal short circuit of the capacitor and the like caused by the fact that other types of initiators cannot be uniformly dissolved in the solvent of the electrolyte.
The invention adopts a solution polymerization mode, the thermal initiator is uniformly dispersed in the solvent, the thermal initiator is decomposed and broken under the heating condition to form two initial free radicals, and then the monomer free radicals are initiated to carry out polymerization reaction, the viscosity of the obtained polymerization system is lower than that of bulk polymerization, the mixing and heat dissipation are easier, the production operation and the temperature are easy to control, and the evaporation of the solvent can be utilized to remove the polymerization heat.
A conventional organic peroxide polymerization initiator (e.g., α' -azobisisobutyronitrile) generates a radical by itself decomposition reaction and generates nitrogen gas to cure the polymer in a state where bubbles are enclosed in the gel, and it is difficult to obtain a uniform gel-like polymer due to the presence of the bubbles.
In the invention, the initiator molecule contains weak bonds, two primary free radicals are generated by heating and decomposing, and the primary free radicals are used for initiating the monomer to generate free radicals so as to generate chain initiation reaction and generate polymerization reaction, thereby forming a gel state. FIG. 1 is a schematic representation of the decomposition of persulfate initiators to free radicals upon heating.
The initiation in the polymerization process comprises the following steps of (1) decomposing an initiator into initial free radicals in a water phase; (2) the initial free radical initiates polymerization in the aqueous phase (the electrolyte is present during the formulation process and even after the formulation is complete); (3) the initial free radical monomer in the water phase diffuses into the emulsion particles or the monomer liquid drops; (4) the free radicals initiate polymerization in the emulsion particles to generate high molecular polymers, so that the emulsion particles grow continuously.
The first stage is a latex particle generating period. The polymerization rate increases from the start of initiation of polymerization until micelles formed by the emulsifier disappear. The free radicals generated in the water phase are diffused into the micelle to initiate and grow to continuously form emulsion particles, and meanwhile, the monomers in the water phase can also initiate polymerization to adsorb emulsifier molecules to form the emulsion particles. Along with the continuous progress of the initiated polymerization, the solubilized micelles continuously nucleate, the emulsion particles continuously increase or enlarge, when the monomer conversion rate is about 15%, the micelles completely disappear and no new emulsion particles are formed, and the initiated polymerization is completely carried out in the emulsion particles later.
The second stage is a constant speed period. After the micelles disappeared, the polymerization entered the second stage. The chain initiation, propagation and termination reactions continue to take place within the latex particles, and the droplets still act as a depot, continuously supplying monomer to the latex particles. The monomer concentration in the latex particles is kept constant, and the polymerization rate in this stage is basically constant by adding the latex particles in a constant number. The monomer conversion rate reaches about 50%, all liquid drops disappear, all monomers enter emulsion particles, and the process begins to shift to the third stage.
And a third stage, namely a deceleration period. The latex particles are composed of monomers and polymers, free radicals in water can continuously diffuse to the latex particles to initiate or terminate, but the monomers have no supplementary source, and the polymerization rate is reduced along with the reduction of the concentration of the monomers in the latex particles until the polymerization is completed.
In the invention, the carbon nano tube is a multi-wall carbon nano tube, and a cross-linked network structure is formed between the polyether amine grafted on the surface of the multi-wall carbon nano tube and the polymer, so that the mechanical property of the electrolyte is improved; meanwhile, in the invention, the polyether amine is grafted on the surface of the carbon nano tube, and the polyether amine and the copolymer are chemically crosslinked, thereby being beneficial to the dispersion of the carbon nano tube in the polymer.
In the invention, after the multi-wall carbon nano tube is grafted with the polyether amine on the surface and compounded with the gel electrolyte, the ionic conductivity of the gel electrolyte is improved, the impedance of the gel electrolyte is reduced, and more electrolyte can be adsorbed in the gel electrolyte due to the special geometric structure of the carbon nano tube, so that the concentration of the electrolyte is high.
In the invention, the edges of two sides of the positive electrode foil respectively extend out of the edges of two sides of the negative electrode foil by 0.5-1mm, and the edges of two sides of the electrolytic paper respectively extend out of the edges of two sides of the positive electrode foil by 0.5-1 mm. In the invention, the edges of the two sides of the positive electrode foil and the negative electrode foil are staggered, so even if burrs on the positive electrode foil pierce the electrolytic paper, the burrs cannot be lapped on the negative electrode foil to cause short circuit. The edges of the two sides of the electrolytic paper respectively extend out of the edges of the two sides of the positive electrode foil, so that the creepage distance of current can be increased when the high-current charging is carried out.
In the invention, the bottom of the rubber plug is provided with a sawtooth-shaped or point-shaped bulge, and the bulge is tightly contacted with the electrolytic paper extending out of the core bag. In the invention, dust or metal chips are easy to blow away from the rubber plug due to the existence of the bulge when falling onto the rubber plug in production.
In the invention, the turning part of the explosion-proof groove is set to be a smooth arc-shaped surface.
The preparation method of the quick charging aluminum electrolytic capacitor comprises the following steps: 1) cutting, namely cutting the positive foil, the negative foil and the electrolytic paper according to the design size of the product;
2) winding the positive foil, the electrolytic paper and the negative foil into a core bag, wherein the edges of two sides of the positive foil respectively extend out of the edges of two sides of the negative foil by 0.5-1mm, and the edges of two sides of the electrolytic paper respectively extend out of the edges of two sides of the positive foil by 0.5-1 mm;
3) winding one or more layers of transparent adhesive tapes on the outer side surface of the core bag;
4) impregnating the core bag with electrolyte;
D. adding excessive thionyl chloride (SOCl2) into the multiwall carbon nanotube, and refluxing for 24 hours at the temperature of 60 ℃ to obtain a dry acyl chloride multiwall carbon nanotube; E. reacting an acyl chloride multi-walled carbon nanotube with excessive polyetheramine at 110 ℃ for 48 hours, cooling, filtering the solution, and repeatedly washing with acetone to completely remove the residual polyetheramine; F. drying the product of the step E in a vacuum box at 40 ℃ for 24 hours, removing residual solvent and storing to obtain the multi-walled carbon nano tube grafted by the acid modified polyetheramine;
5) assembling the core package obtained in the step 4),
placing a layer of packing paper in the shell with the generated insulating film;
sealing the core bag in the shell through a rubber plug;
6) and a layer of marking film is stuck to the bottom of the shell.
In the invention, a layer of packing paper is placed in the shell, so that when the explosion-proof groove is opened in the aging or using process of the capacitor, the electrolyte cannot be directly flushed out of the explosion-proof groove, and the electrolyte pollutes a circuit board. Meanwhile, the marking film can further buffer the impact of the electrolyte, and at least the core package cannot be flushed out along with the electrolyte.
Compared with the prior art, the invention has the advantages that: the electrolyte of the quick-charging aluminum electrolytic capacitor has high ionic conductivity and small impedance, so that the heating of the capacitor during large-current charging can be reduced. Meanwhile, the dislocation arrangement of the two side edges of the positive foil, the negative foil and the electrolytic paper can ensure the stability of the capacitor.
Drawings
FIG. 1 is a schematic view of the structure of a rapid charging aluminum electrolytic capacitor according to the present invention.
Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.
Fig. 3 is an enlarged schematic view of the structure at B in fig. 1.
Fig. 4 is a schematic structural view of the core pack of the present invention after being unfolded.
Fig. 5 is a schematic structural view of the explosion-proof tank of the present invention.
Description of the figures
1. A housing; 2. a core package; 3. a rubber plug; 4. an insulating film; 5. a positive electrode foil; 6. a negative electrode foil; 7. electrolyzing paper; 8. a transparent adhesive tape; 9. an explosion-proof groove; 10. packing paper; 11. a marking film; 12. and (4) protruding.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Examples
As shown in fig. 1, the fast charging aluminum electrolytic capacitor comprises a housing 1, a core package 2 and a rubber plug 3, wherein the core package 2 is sealed in the housing 1 through the rubber plug after being impregnated with electrolyte. As shown in fig. 3, an insulating film 4 is formed on the inner wall of the housing 1; the core bag 2 is formed by winding a positive electrode foil 5, a negative electrode foil 6 and electrolytic paper 7, wherein two side edges of the negative electrode foil 6 are positioned at the inner sides of two side edges of the positive electrode foil 5, and two side edges of the electrolytic paper 7 extend out of two side edges of the positive electrode foil 5. As shown in fig. 2 and 5, an explosion-proof slot 9 is formed in the inner shell surface of the bottom of the outer shell 1, the explosion-proof slot 9 faces the bottom of the core package 2, a layer of packing paper 10 is arranged between the bottom of the core package 2 and the explosion-proof slot 9, and one or more layers of transparent adhesive tapes 8 are wound on the outermost layer of the core package 2; the bottom of the housing 1 has a flat housing surface and is printed or otherwise affixed with a logo film 11. In this embodiment, the bottom of the rubber plug 3 is provided with a sawtooth-shaped or dot-shaped protrusion 12, and the protrusion 12 is in close contact with the electrolytic paper 7 extending from the core pack 2. The turning part of the explosion-proof groove 9 is set to be a smooth arc surface.
In this embodiment, the electrolyte includes a solution system
And solution system
Solution system
And solution system
The weight mixing ratio of the components is 1:4-7: 3; solution system
The carbon nano tube contains 5 percent of carbon nano tube by mass percent, and the carbon nano tube is prepared by using concentrated sulfuric acid: solution treated modified carbon nanotubes of concentrated nitric acid =3: 1. Solution system
Comprises 85% of polymerized monomer, 10% of cross-linking agent and 5% of thermal initiator, wherein the thermal initiator comprises one or more of hydrogen peroxide, persulfate and hydroperoxide; the polymeric monomer is acrylic acid and derivatives thereof.
In this example, the crosslinking agent was 2-hydroxyethyl methacrylate. The polymerized monomer is isobutyl acrylate.
In this example, the solution system
Also comprises 50 percent of main solvent, 20 percent of auxiliary solvent, 20 percent of main solute, 4 percent of auxiliary solute and 1 percent of additive; the main solvent can be glycol, and the auxiliary solvent can be one or more of water, glycerol, propylene glycol and 1, 4-butanediol. In this embodiment, the primary solute includes succinic acid, glutaric acid, adipic acid, ammonium adipate, ammonium suberate, ammonium azelate, ammonium sebacate, ammonium 1, 7-sebacate, ammonium isosebacate, ammonium alkyl sebacateOne or more of ammonium dodecanedioate and 2-hexyladipic acid; the secondary solute comprises one or more of boric acid, polyvinyl alcohol, polyethylene glycol, butyl phosphate, monobutyl phosphate, ammonium pentaborate, phthalic acid, terephthalic acid and citric acid.
In this embodiment, the additive comprises a nitro compound comprising one or more of p-nitrophenol, o-nitrophenol, m-dinitrobenzene, p-nitroanisole or p-nitrobenzyl alcohol, ammonium hypophosphite.
As shown in FIG. 4, the two side edges of the positive electrode foil 5 respectively extend 0.8mm beyond the two side edges of the negative electrode foil 6, and the two side edges of the electrolytic paper 7 respectively extend 0.8mm beyond the two side edges of the positive electrode foil 5.
The preparation method of the quick-charging aluminum electrolytic capacitor comprises the following steps: 1) cutting, namely cutting the positive foil, the negative foil and the electrolytic paper according to the design size of the product;
2) winding the positive foil, the electrolytic paper and the negative foil into a core bag, wherein the edges of two sides of the positive foil respectively extend out of the edges of two sides of the negative foil by 0.8mm, and the edges of two sides of the electrolytic paper respectively extend out of the edges of two sides of the positive foil by 0.8 mm;
3) winding one or more layers of transparent adhesive tapes on the outer side surface of the core bag;
4) impregnating the core bag with electrolyte;
D. adding excessive thionyl chloride (SOCl2) into the multiwall carbon nanotube, and refluxing for 24 hours at the temperature of 60 ℃ to obtain a dry acyl chloride multiwall carbon nanotube; E. reacting an acyl chloride multi-walled carbon nanotube with excessive polyetheramine at 110 ℃ for 48 hours, cooling, filtering the solution, and repeatedly washing with acetone to completely remove the residual polyetheramine; F. drying the product of the step E in a vacuum box at 40 ℃ for 24 hours, removing residual solvent and storing to obtain the multi-walled carbon nano tube grafted by the acid modified polyetheramine;
5) assembling the core package obtained in the step 4),
placing a layer of packing paper in the shell with the generated insulating film;
sealing the core bag in the shell through a rubber plug;
6) and a layer of marking film is stuck to the bottom of the shell.
The electrolyte of the fast-charging aluminum electrolytic capacitor of the embodiment has high ionic conductivity and small impedance, so that the heat generation of the capacitor during large-current charging can be reduced. Meanwhile, the dislocation arrangement of the two side edges of the positive foil, the negative foil and the electrolytic paper can ensure the stability of the capacitor.
Claims (9)
1. A quick charge aluminum electrolytic capacitor is characterized in that: the core bag is sealed in the shell through the rubber plug after being impregnated with electrolyte; an insulating film is generated on the inner wall of the shell; the core bag is formed by winding a positive electrode foil, a negative electrode foil and electrolytic paper, wherein two side edges of the negative electrode foil are positioned at the inner sides of two side edges of the positive electrode foil, and two side edges of the electrolytic paper extend out of two side edges of the positive electrode foil; an anti-explosion groove is formed in the inner shell surface of the bottom of the shell, the anti-explosion groove is opposite to the bottom of the core bag, a layer of packing paper is arranged between the bottom of the core bag and the anti-explosion groove, one or more layers of transparent adhesive tapes are wound on the outermost layer of the core bag, and the outer side face of the core bag is filled with the transparent adhesive tapes; the surface of the shell at the bottom of the shell is flat and is printed or pasted with a layer of marking film;
the electrolyte comprises a solution system
And solution system
Said solution system
And solution system
The weight mixing ratio of the components is 1:4-7: 3; the solution system
The carbon nano tube with the mass percent of 2 percent to 15 percent is contained; the solution system
Comprises 85 to 95 percent of polymerized monomer, 2 to 20 percent of cross-linking agent and 0.1 to 10 percent of thermal initiator, wherein the thermal initiator comprises one or more of hydrogen peroxide, persulfate and hydroperoxide; the polymerization monomer is acrylic acid and derivatives thereof;
the carbon nano tube is prepared by using concentrated sulfuric acid: solution treated modified carbon nanotubes with concentrated nitric acid =3: 1; the carbon nano tube is a multi-wall carbon nano tube, and polyether amine is grafted on the surface of the multi-wall carbon nano tube.
2. The fast-charging aluminum electrolytic capacitor of claim 1, wherein: the cross-linking agent comprises one or more of 2-ethylhexyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate and methyl methacrylate; the polymeric monomer comprises one or more of acrylic acid, polyacrylic acid, methyl acrylate, isobutyl acrylate and ethyl methacrylate.
3. The fast-charging aluminum electrolytic capacitor of claim 1, wherein: the solution system
Also comprises 45 to 65 percent of main solvent, 15 to 25 percent of auxiliary solvent, 8 to 25 percent of main solute, 2 to 5 percent of auxiliary solute and 0.5 to 3 percent of additive; the main solvent may be ethylene glycol, and the auxiliary solvent includes one or more of water, glycerin, glycerol, propylene glycol, and 1, 4-butylene glycol.
4. The fast-charging aluminum electrolytic capacitor of claim 3, wherein: the main solute comprises one or more of succinic acid, glutaric acid, adipic acid, ammonium adipate, ammonium suberate, ammonium azelate, ammonium sebacate, 1, 7-ammonium sebacate, ammonium isosebacate, ammonium alkyl sebacate, ammonium dodecalaurate and 2-hexyl adipic acid; the secondary solute comprises one or more of boric acid, polyvinyl alcohol, polyethylene glycol, butyl phosphate, monobutyl phosphate, ammonium pentaborate, phthalic acid, terephthalic acid and citric acid.
5. The fast-charging aluminum electrolytic capacitor of claim 3, wherein: the additive comprises nitro compounds including one or more of p-nitrophenol, o-nitrophenol, m-dinitrobenzene, p-nitroanisole or p-nitrobenzol, and ammonium hypophosphite.
6. The fast-charging aluminum electrolytic capacitor of claim 1, wherein: the edges of two sides of the positive electrode foil respectively extend out of the edges of two sides of the negative electrode foil by 0.5-1mm, and the edges of two sides of the electrolytic paper respectively extend out of the edges of two sides of the positive electrode foil by 0.5-1 mm.
7. The fast-charging aluminum electrolytic capacitor of claim 1, wherein: the bottom of the rubber plug is provided with zigzag or dotted bulges, and the bulges are tightly contacted with the electrolytic paper extending out of the core bag.
8. The fast-charging aluminum electrolytic capacitor of claim 1, wherein: the turning part of the explosion-proof groove is set to be a smooth arc-shaped surface.
9. The method of manufacturing a fast-charging aluminum electrolytic capacitor according to any one of claims 1 to 8, characterized in that: the method comprises the following steps: 1) cutting, namely cutting the positive foil, the negative foil and the electrolytic paper according to the design size of the product;
2) winding the positive foil, the electrolytic paper and the negative foil into a core bag, wherein the edges of two sides of the positive foil respectively extend out of the edges of two sides of the negative foil by 0.5-1mm, and the edges of two sides of the electrolytic paper respectively extend out of the edges of two sides of the positive foil by 0.5-1 mm;
3) winding one or more layers of transparent adhesive tapes on the outer side surface of the core bag;
4) impregnating the core bag with electrolyte;
D. adding excessive thionyl chloride (SOCl2) into the multiwall carbon nanotube, and refluxing for 24 hours at the temperature of 60 ℃ to obtain a dry acyl chloride multiwall carbon nanotube; E. reacting an acyl chloride multi-walled carbon nanotube with excessive polyetheramine at 110 ℃ for 48 hours, cooling, filtering the solution, and repeatedly washing with acetone to completely remove the residual polyetheramine; F. drying the product of the step E in a vacuum box at 40 ℃ for 24 hours, removing residual solvent and storing to obtain the multi-walled carbon nano tube grafted by the acid modified polyetheramine;
5) assembling the core package obtained in the step 4),
placing a layer of packing paper in the shell with the generated insulating film;
sealing the core bag in the shell through a rubber plug;
6) and a layer of marking film is stuck to the bottom of the shell.
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| CN201810039453.3A CN108231420B (en) | 2018-01-16 | 2018-01-16 | Quick-charging aluminum electrolytic capacitor and preparation method thereof |
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| CN109243827B (en) * | 2018-11-07 | 2020-10-20 | 广州金立电子有限公司 | Capacitor and manufacturing method thereof |
| CN113611535A (en) * | 2021-08-04 | 2021-11-05 | 广东联盈控电子科技有限公司 | Electrolyte for aluminum electrolytic capacitor and preparation method thereof |
| CN116525304B (en) * | 2023-06-29 | 2023-12-01 | 深圳市新中元电子有限公司 | Preparation method of solid-liquid mixed electrolytic capacitor |
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| CN108231420A (en) | 2018-06-29 |
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