CN101556866A - High-end large-scale aluminum electrolysis capacitor and preparation method thereof - Google Patents
High-end large-scale aluminum electrolysis capacitor and preparation method thereof Download PDFInfo
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- CN101556866A CN101556866A CNA200910039653XA CN200910039653A CN101556866A CN 101556866 A CN101556866 A CN 101556866A CN A200910039653X A CNA200910039653X A CN A200910039653XA CN 200910039653 A CN200910039653 A CN 200910039653A CN 101556866 A CN101556866 A CN 101556866A
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Abstract
The invention discloses a high-end large-scale aluminum electrolysis capacitor and a preparation method thereof. The capacitor comprises a capacitor core, an aluminum shell for encapsulating the capacitor core, a cover board arranged at the opening of the top end of the aluminum shell and positive and negative extraction strips for connecting the core and the cover board. The capacitor core is formed by winding after overlapping positive and negative paillons with electrolytic paper which is used for playing a role of interval between the positive paillons and the negative paillons. A fixing agent is closely filled in the clearance between the lower part of the core and the inner wall of the aluminum shell. The cover board is provided with an explosion-proof valve. The positive and negative extraction strips comprise two or more pairs of extraction strips. The negative paillons at the lower end of the core extend out of the core and contact with the bottom end of the aluminum shell. In the preparation method of the aluminum electrolysis capacitor, impregnation electrolysis solution with properties of high temperature resistance, high stability and strong corrosion resistance is selected, ensuring that the high-end aluminum electrolysis capacitor products are safe and reliable, are long in service life and good in high temperature resistance. The service life of the capacitor can achieve 8,000 hours at 105 DEG C or 2,000 hours at 125 DEG C.
Description
Technical field
The present invention relates to a kind of aluminium electrolytic capacitor and preparation method thereof, relate in particular to a kind of high-end large-scale aluminum electrolysis capacitor and preparation method thereof.
Background technology
Along with science and technology develops with rapid changepl. never-ending changes and improvementsly, complete machine industries such as automotive electronics, programme-controlled exchange device, frequency-variable controller and UPS uninterrupted power supply have been more and more high to the requirement of screw bolt-type aluminium electrolytic capacitor at present.Because above-mentioned complete machine industry characteristic is the circuit more complicated, therefore the environment for use harshness needs aluminium electrolytic capacitor to possess the characteristic that high temperature resistant, long-life, big capacity and large ripple current-resistant impact.The Working electrolyte system that prior art screw bolt-type aluminium electrolytic capacitor adopts is more single, Working electrolyte high temperature physical and chemical performance instability, reactions such as thermal decomposition, amidatioon and esterification easily take place, adopt conventional design, cause capacitor stability not high, useful life is short, and anti-steady ripple current capacity is poor.Prior art products mainly is after work a period of time, is prone to following early failure:
(1) when capacitor was worked in circuit for a long time, anode lead and anode aluminium foil easily corroded, even the anode lead all is corroded disconnectedly, made product be in open-circuit condition and lost efficacy.
(2) product poor high temperature stability when fluctuation or long time continuous working take place civil power, is prone to scintillation, puncture, causes the short circuit blast, even catches fire, and causes security incident.
(3) the anti-ripple current ability of product is not enough, use a period of time after internal pressure sharply raise, cause product bottom bulging or explosion-proof plug to be opened, cause electrolyte to be evaporated and make fuse dry.
(4) because the electrolyte heat-resisting quantity is not enough, it is very fast that the product capacitance easily decays and loss is gone up, and causes ESR to increase, and the capacitor internal temperature rise becomes greatly, impels product to lose efficacy in advance.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of safe and reliable, long-life, resistant to elevated temperatures high-end large-scale aluminum electrolysis capacitor and preparation method thereof.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions: a kind of high-end large-scale aluminum electrolysis capacitor, comprise the aluminum hull of capacitor core body, encapsulated capacitor core body and the cover plate at aluminum hull top end opening place, and the positive and negative lead that connects core body and cover plate, described electric capacity core body is by positive and negative paillon foil with after the electrolytic paper stack that plays interval action between the positive and negative paillon foil, coiling forms, and the gap location of described core body bottom and aluminum hull inwall tightly is filled with fixative.Described cover plate is provided with explosion-proof valve.Described positive and negative lead is many to lead more than two couples, and maximum leads can be 10 pairs.The core body body is exposed in the negative paillon foil extension of described core body lower end, and contacts with the aluminum hull bottom.
Compared with prior art, the gap location of core body bottom and aluminum hull inwall tightly is filled with fixative, the firmly firm core body of this fixative, and to guarantee core body under the impact that is subjected to any machinery or chemical reaction, any displacement does not take place in core body in housing.Make and press the factor that raises rapidly to impact down in it when capacitor is subjected to extreme voltage or other, the cover plate explosion-proof valve is opened rapidly, reduce the capacitor pressure inside rapidly, effectively prevented to damage adjacent circuit or electrical equipment, the safety that jeopardizes the people after the whole blast of capacitor.Core body is exposed in the negative paillon foil extension of core body lower end, and contact with the aluminum hull bottom, when electric capacity is at high temperature worked, because the ripple current that capacitor inside is passed through is big, cause capacitor itself to produce higher temperature rise, negative paillon foil can be rapidly with this thermal energy conduction to housing, the heat conduction of capacitor inside is gone out, make that further the large-scale aluminum electrolysis capacitor of this structure is safe and reliable, the long-life, high temperature resistant.
The present invention also provides the preparation method of above-mentioned high-end large-scale aluminum electrolysis capacitor, comprise coiling, impregnation, cover plate riveted joint, aging step, it is characterized in that: the weight percent of described impregnation electrolyte consists of: main solvent 39.2～81.4wt%, secondary solvent 8～26wt%, solute 7～22wt%, property-modifying additive 3～11wt%, hydrogen agent 0.4～1.2wt% and waterproof mixture 0.2～0.6wt% disappear; Described main solvent is an ethylene glycol; Secondary solvent is one or both of gamma-butyrolacton, tetrahydrofurfuryl alcohol; Solute is one or more mixtures in ammonium azelate, ammonium benzoate, the 1.7-ammonium sebacate.
Further: thermal decomposition, esterification and amidation process at high temperature take place for preventing above-mentioned high-end large-scale aluminum electrolysis capacitor, need in electrolyte, to add property-modifying additive is arranged in right amount, this property-modifying additive is the machine carboxylic acid, make solute composition buffer system in this organic carboxyl acid and the electrolyte, improve its high-temperature stability, organic carboxyl acid is one or more mixtures in azelaic acid, benzoic acid and the decanedioic acid.For preventing anodic attack, described property-modifying additive also comprises one or more mixtures in pentaerythrite, phosphotungstic acid and the acid of phosphorus lemon.The described hydrogen agent that disappears is one or both in paranitrobenzoic acid, the p-nitrophenol, and the waterproof mixture is one or both in phosphorous acid, the ammonium hypophosphite.
In the preparation method of above-mentioned electrolyte, add solute after main solvent, secondary solvent be heated to 70-90 ℃, continue to be heated to 110-135 ℃, add additive again, the hydrogen agent that disappears, waterproof mixture, make it to dissolve fully the back natural cooling.This Working electrolyte is adapted to the high-end large-scale aluminum electrolysis capacitor that rated voltage is 160-250V.This electrolyte is high temperature resistant, high flash over voltage, corrosion resistance strong and have high-temperature stability, makes that high end capacitor itself is more safe and reliable.
The present invention also provides another preparation method of above-mentioned high-end large-scale aluminum electrolysis capacitor, comprise coiling, impregnation, cover plate riveted joint, aging step, the weight percent of described impregnation electrolyte consists of: main solvent 45～81wt%, pure water 8～25wt%, solute 10～25wt%, property-modifying additive 1～5wt%; Described main solvent is one or both in ethylene glycol, the N-methyl pyrrolidone; Solute is one or more in ammonium adipate, ammonium benzoate, phthalic acid, the ammonium succinate.Pure water can improve the conductivity of electrolyte, reduces product E SR value.
Further: because electrolyte at high temperature can slowly corrode the anode aluminium foil surface film oxide, change the compactness of oxide-film, make oxide-film become loose porous, cause the product electrical property to worsen, need to add property-modifying additive.Described modification interpolation Ji is one or more in ammonium hydrogen phosphate, ammonium dihydrogen phosphate and the phosphoric acid.In addition, when electrolyte is repaired oxide-film, negative pole must discharge hydrogen, too much hydrogen can make voltage rise height in the product, cause the product drum end or explosion-proof valve to be opened, for eliminating the aging hydrogen that produces, described additive also comprises one or more in ortho-nitroanisole, 3-nitroacetophenone and the p-nitrophenol.
In the preparation method of above-mentioned electrolyte, add solute after main solvent, water is heated to 55-75 ℃, continue to be heated to 85-95 ℃, add additive again, make it to dissolve fully the back natural cooling.This Working electrolyte is adapted to the aluminium electrolytic capacitor product that rated voltage is 10-100V.This electrolyte is high temperature resistant, corrosion resistance strong and have high-temperature stability, makes that high end capacitor itself is more safe and reliable.
Compared with prior art, the present invention has changed the internal structure of capacitor, selects the Working electrolyte that high temperature resistant, corrosion resistance is strong and have high-temperature stability, makes that high-end aluminium electrolytic capacitor product is safe and reliable, the long-life, high temperature resistant.Reach 105 ℃ of 8000 hours or 125 ℃ 2000 hours the useful life of this capacitor, guarantee that aluminium electrolytic capacitor product can satisfy the superelevation requirement of large-scale complete electronic set fully, drive the development and the upgrading of related industry.
Description of drawings
Fig. 1 is portion's diagrammatic sketch of product internal structure of the present invention; Wherein, 1 capacitor core body, 2 aluminum hulls, 3 cover plates, 4 fixatives, 5 explosion-proof valves, 6 negative paillon foils, 7 electrolytic papers, 8 leads.
Embodiment
Purport of the present invention is the internal structure that changes capacitor, and promptly the gap location of core body bottom and aluminum hull inwall tightly is filled with fixative, and it is many to lead more than two couples that described cover plate is provided with explosion-proof valve and described positive and negative lead; Core body is exposed in the negative paillon foil extension of described core body lower end, and contacts with the aluminum hull bottom.Select the Working electrolyte that high temperature resistant, corrosion resistance is strong and have high-temperature stability, make that high-end aluminium electrolytic capacitor product is safe and reliable, the long-life, high temperature resistant.Below in conjunction with embodiment content of the present invention is described in further detail, mentioned content is not a limitation of the invention among the embodiment, and Selection of technological conditions such as temperature, time, component can be suited measures to local conditions and the result be there is no substantial effect among the preparation method.
At first, the basic scheme of summary product structure of the present invention: a kind of high-end large-scale aluminum electrolysis capacitor, comprise the aluminum hull 2 of capacitor core body 1, encapsulated capacitor core body, the cover plate 3 at aluminum hull top end opening place, and the positive and negative lead 8 that connects core body and cover plate, described electric capacity core body 1 is by positive and negative paillon foil with after the electrolytic paper stack that plays interval action between the positive and negative paillon foil, coiling forms, and the gap location of described core body 1 bottom and aluminum hull 2 inwalls tightly is filled with fixative 4; Described cover plate 3 is provided with explosion-proof valve 5; Described positive and negative lead 8 is many to lead more than two couples; The negative paillon foil 6 of described core body 1 lower end extends the body that exposes core body 1, and contacts with aluminum hull 2 bottoms.
In the preparation method of above-mentioned high-end large-scale aluminum electrolysis capacitor, comprise coiling, impregnation, cover plate riveted joint, aging step, the weight percent of described impregnation electrolyte consists of: main solvent 39.2～81.4wt%, secondary solvent 8～26wt%, solute 7～22wt%, property-modifying additive 3～11wt%, hydrogen agent 0.4～1.2wt% and waterproof mixture 0.2～0.6wt% disappear; Described main solvent is an ethylene glycol; Secondary solvent is one or both of gamma-butyrolacton, tetrahydrofurfuryl alcohol; Solute is one or more mixtures in ammonium azelate, ammonium benzoate, the 1.7-ammonium sebacate.
In another preparation method of above-mentioned high-end large-scale aluminum electrolysis capacitor, comprise coiling, impregnation, cover plate riveted joint, aging step, the weight percent of described impregnation electrolyte consists of: main solvent 45～81wt%, pure water 8～25wt%, solute 10～25wt%, property-modifying additive 1～5wt%; Described main solvent is one or both in ethylene glycol, the N-methyl pyrrolidone; Solute is one or more in ammonium adipate, ammonium benzoate, phthalic acid, the ammonium succinate.
A kind of high-end large-scale aluminum electrolysis capacitor, comprise the aluminum hull 2 of capacitor core body 1, encapsulated capacitor core body and the cover plate 3 at aluminum hull top end opening place, and the positive and negative lead 8 that connects core body and cover plate, described electric capacity core body 1 is by positive and negative paillon foil with after the electrolytic paper stack that plays interval action between the positive and negative paillon foil, coiling forms, and the gap location of described core body 1 bottom and aluminum hull 2 inwalls tightly is filled with fixative 4; Described cover plate 3 is provided with explosion-proof valve 5; Described positive and negative lead 8 is many to lead more than two couples; The negative paillon foil 6 of described core body 1 lower end extends the body that exposes core body 1, and contacts with aluminum hull 2 bottoms, and negative paillon foil exceeds electrolytic paper 7 edge 1-2mm.When preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 1 prescription of table 1.Wherein: main solvent is an ethylene glycol, and secondary solvent is a gamma-butyrolacton, and solute is an ammonium benzoate, and additive is the mixture of pentaerythrite and azelaic acid, and the hydrogen agent that disappears is a paranitrobenzoic acid, and the waterproof mixture is a phosphorous acid.Ethylene glycol, gamma-butyrolacton are heated to 70-90 ℃, add ammonium benzoate, be heated to 110-135 ℃ and close fire, add the mixture of pentaerythrite, azelaic acid, paranitrobenzoic acid and phosphorous acid at last, make it to dissolve fully, get final product behind the natural cooling.In making 10000 μ F/250V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 2 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 1).
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 2 prescriptions of table 1.Wherein: main solvent is an ethylene glycol, and secondary solvent is a tetrahydrofurfuryl alcohol, and solute is an ammonium azelate, and additive is phosphotungstic acid and benzoic mixture, and the hydrogen agent that disappears is a p-nitrophenol, and the waterproof mixture is an ammonium phosphite.Ethylene glycol, tetrahydrofurfuryl alcohol are heated to 70-90 ℃, add ammonium azelate, be heated to 110-135 ℃ and close fire, add the mixture of phosphotungstic acid, benzoic acid, p-nitrophenol and ammonium hypophosphite at last, make it to dissolve fully, get final product behind the natural cooling.In making 10000 μ F/250V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 2 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 2).
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 3 prescriptions of table 1.Wherein: main solvent is an ethylene glycol, secondary solvent is the mixture of gamma-butyrolacton and tetrahydrofurfuryl alcohol, and solute is the 1.7-ammonium sebacate, and additive is the mixture of acid of phosphorus lemon and decanedioic acid, the hydrogen agent that disappears is paranitrobenzoic acid and p-nitrophenol, and the waterproof mixture is an ammonium phosphite.The mixture of ethylene glycol, gamma-butyrolacton and tetrahydrofurfuryl alcohol is heated to 70-90 ℃, add the 1.7-ammonium sebacate, be heated to 110-135 ℃ and close fire, the mixture that adds the acid of phosphorus lemon, decanedioic acid, paranitrobenzoic acid, p-nitrophenol and ammonium phosphite at last, make it to dissolve fully, get final product behind the natural cooling.In making 10000 μ F/250V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 2 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 3).
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 4 prescriptions of table 1.Wherein: main solvent is an ethylene glycol, secondary solvent is a gamma-butyrolacton, and solute is the mixture of ammonium azelate and ammonium benzoate, and additive is the mixture of pentaerythrite, benzoic acid and decanedioic acid, the hydrogen agent that disappears is a paranitrobenzoic acid, and the waterproof mixture is phosphorous acid and ammonium hypophosphite.Ethylene glycol, gamma-butyrolacton are heated to 70-90 ℃, add ammonium azelate and ammonium benzoate, be heated to 110-135 ℃ and close fire, add pentaerythrite, benzoic acid, decanedioic acid, paranitrobenzoic acid, phosphorous acid and ammonium hypophosphite mixture at last, make it to dissolve fully, get final product behind the natural cooling.In making 10000 μ F/250V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 2 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 4).
Embodiment 5
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 5 prescriptions of table 1.Wherein: main solvent is an ethylene glycol, secondary solvent is a tetrahydrofurfuryl alcohol, solute is the mixture of ammonium azelate, ammonium benzoate and 1.7-ammonium sebacate, additive is the mixture of pentaerythrite and decanedioic acid, the hydrogen agent that disappears is paranitrobenzoic acid and p-nitrophenol, and the waterproof mixture is phosphorous acid and ammonium hypophosphite.Ethylene glycol, tetrahydrofurfuryl alcohol are heated to 70-90 ℃, add ammonium azelate, ammonium benzoate and 1.7-ammonium sebacate, be heated to 110-135 ℃ and close fire, the mixture that adds pentaerythrite, decanedioic acid, paranitrobenzoic acid, p-nitrophenol, phosphorous acid and ammonium hypophosphite at last, make it to dissolve fully, get final product behind the natural cooling.In making 10000 μ F/250V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 2 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 5).
Table 1: the percentage by weight of embodiment 1-5 electrolyte (being suitable for rated voltage 160-250V)
Table 2: 1-5 electrolyte is made 10000 μ F/250V electrolytic capacitor products, the performance test data behind the experiment of high-temperature load in the application table 1
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 1 prescription of table 3.Wherein: main solvent is an ethylene glycol, and solute is an ammonium adipate, and additive is the mixture of ammonium hydrogen phosphate and ortho-nitroanisole.Ethylene glycol and pure water are heated to 55-75 ℃, add ammonium adipate, be heated to 85-95 ℃ and close fire, add the mixture of ammonium hydrogen phosphate and ortho-nitroanisole at last, make it to dissolve fully, get final product behind the natural cooling.In making 180000 μ F/50V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 4 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 1).
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 2 prescriptions of table 3.Wherein: main solvent is an ethylene glycol, and solute is ammonium benzoate and ammonium succinate, and additive is the mixture of ammonium dihydrogen phosphate and 3-nitroacetophenone.Ethylene glycol and pure water are heated to 55-75 ℃, add ammonium benzoate and ammonium succinate, be heated to 85-95 ℃ and close fire, add the mixture of ammonium dihydrogen phosphate and 3-nitroacetophenone at last, make it to dissolve fully, get final product behind the natural cooling.In making 180000 μ F/50V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 4 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 2).
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 3 prescriptions of table 3.Wherein: main solvent is an ethylene glycol, and solute is phthalic acid and ammonium succinate, and additive is the mixture of phosphoric acid and p-nitrophenol.Ethylene glycol and pure water are heated to 55-75 ℃, add phthalic acid and ammonium succinate, be heated to 85-95 ℃ and close fire, add the mixture of phosphoric acid and p-nitrophenol at last, make it to dissolve fully, get final product behind the natural cooling.In making 180000 μ F/50V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 4 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 3).
Embodiment 9
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 4 prescriptions of table 3.Wherein: main solvent is the N-methyl pyrrolidone, and solute is phthalic acid and ammonium adipate, and additive is the mixture of ammonium dihydrogen phosphate, ammonium hydrogen phosphate and ortho-nitroanisole.N-methyl pyrrolidone and pure water are heated to 55-75 ℃, add phthalic acid and ammonium adipate, be heated to 85-95 ℃ and close fire, add the mixture of ammonium dihydrogen phosphate, ammonium hydrogen phosphate, ortho-nitroanisole at last, make it to dissolve fully, get final product behind the natural cooling.In making 180000 μ F/50V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 4 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 4).
Embodiment 10
Product structure such as embodiment 1, when preparing this aluminium electrolytic capacitor, the electrolyte weight percentage composition of institute's impregnation is No. 5 prescriptions of table 3.Wherein: main solvent is the N-methyl pyrrolidone, and solute is the mixture of phthalic acid and ammonium benzoate, and additive is ammonium dihydrogen phosphate, phosphoric acid, 3-nitroacetophenone and p-nitrophenol.N-methyl pyrrolidone and pure water are heated to 55-75 ℃, the mixture that adds phthalic acid and ammonium benzoate, be heated to 85-95 ℃ and close fire, the mixture that adds ammonium dihydrogen phosphate, phosphoric acid, 3-nitroacetophenone and p-nitrophenol at last, make it to dissolve fully, get final product behind the natural cooling.In making 180000 μ F/50V screw bolt-type aluminium electrolytic capacitor products, the properties of product of gained are as described in Table 4 with this used for electrolyte, behind 105 ℃ of load 8000h, and properties of product still very superior (No. 5).
Table 3: the percentage by weight of embodiment 6-10 electrolyte (being suitable for rated voltage 10000 μ F/250V)
1-5 electrolyte is made 180000 μ F/50V aluminium electrolytic capacitor products, the performance test data behind the experiment of high-temperature load in table 4, the application table 3
Claims (9)
1, a kind of high-end large-scale aluminum electrolysis capacitor, comprise the aluminum hull (2) of capacitor core body (1), encapsulated capacitor core body, the cover plate (3) at aluminum hull top end opening place and the positive and negative lead (8) that connects core body and cover plate, described electric capacity core body (1) is by positive and negative paillon foil with after the electrolytic paper stack that plays interval action between the positive and negative paillon foil, coiling forms, and it is characterized in that:
The gap location of described core body (1) bottom and aluminum hull (2) inwall tightly is filled with fixative (4);
Described cover plate (3) is provided with explosion-proof valve (5);
How right described positive and negative lead (8) be;
The body of core body (1) is exposed in negative paillon foil (6) extension of described core body (1) lower end, and contacts with aluminum hull (2) bottom.
2, a kind of method for preparing the described high-end large-scale aluminum electrolysis capacitor of claim 1, comprise coiling, impregnation, cover plate riveted joint, aging step, it is characterized in that: the weight percent of described impregnation electrolyte consists of: main solvent 39.2～81.4wt%, secondary solvent 8～26wt%, solute 7～22wt%, property-modifying additive 3～11wt%, hydrogen agent 0.4～1.2wt% and waterproof mixture 0.2～0.6wt% disappear;
Main solvent is an ethylene glycol;
Secondary solvent is one or both of gamma-butyrolacton, tetrahydrofurfuryl alcohol;
Solute is one or more mixtures in ammonium azelate, ammonium benzoate, the 1.7-ammonium sebacate.
3, preparation method according to claim 2 is characterized in that, described additive is the anticorrisive agent that prevents anode foil corrosion, and described anticorrisive agent is one or more materials in pentaerythrite, phosphotungstic acid, the acid of phosphorus lemon.
4, preparation method according to claim 3 is characterized in that: described additive also comprises one or more in the azelaic acid that can improve the electrolyte high-temperature stability, benzoic acid, the decanedioic acid.
5, preparation method according to claim 4 is characterized in that: the described hydrogen agent that disappears is one or both in paranitrobenzoic acid, the p-nitrophenol.
6, preparation method according to claim 5 is characterized in that: described waterproof mixture is one or both in phosphorous acid, the ammonium hypophosphite.
7, a kind of method for preparing the described high-end large-scale aluminum electrolysis capacitor of claim 1, comprise coiling, impregnation, cover plate riveted joint, aging step, it is characterized in that: the weight percent of described impregnation electrolyte consists of: main solvent 45～81wt%, pure water 8～25wt%, solute 10～25wt%, property-modifying additive 1～5wt%;
Described main solvent is one or both in ethylene glycol, the N-methyl pyrrolidone;
Solute is one or more in ammonium adipate, ammonium benzoate, phthalic acid, the ammonium succinate.
8, preparation method according to claim 7 is characterized in that: described modification interpolation Ji is one or more in ammonium hydrogen phosphate, ammonium dihydrogen phosphate and the phosphoric acid.
9, preparation method according to claim 8 is characterized in that: described additive also comprises one or more in ortho-nitroanisole, 3-nitroacetophenone and the p-nitrophenol.
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