CN112670089B - High-voltage aluminum electrolytic capacitor and preparation method thereof - Google Patents
High-voltage aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- 239000003990 capacitor Substances 0.000 title claims abstract description 93
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000011888 foil Substances 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000005470 impregnation Methods 0.000 claims abstract description 18
- 230000032683 aging Effects 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 14
- 229920003023 plastic Polymers 0.000 claims abstract description 5
- 239000004033 plastic Substances 0.000 claims abstract description 5
- 238000002791 soaking Methods 0.000 claims abstract description 5
- 239000011244 liquid electrolyte Substances 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 238000000465 moulding Methods 0.000 claims abstract description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 94
- 239000000654 additive Substances 0.000 claims description 46
- 239000003792 electrolyte Substances 0.000 claims description 46
- 230000000996 additive effect Effects 0.000 claims description 42
- 238000010438 heat treatment Methods 0.000 claims description 41
- 238000001816 cooling Methods 0.000 claims description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 30
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- 238000000034 method Methods 0.000 claims description 22
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- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 claims description 15
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 15
- SATJMZAWJRWBRX-UHFFFAOYSA-N azane;decanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCC([O-])=O SATJMZAWJRWBRX-UHFFFAOYSA-N 0.000 claims description 15
- GPEVMRFAFMVKHK-UHFFFAOYSA-N azane;dodecanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCCCC([O-])=O GPEVMRFAFMVKHK-UHFFFAOYSA-N 0.000 claims description 15
- 239000005543 nano-size silicon particle Substances 0.000 claims description 15
- 235000012239 silicon dioxide Nutrition 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 11
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 10
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 10
- 239000004327 boric acid Substances 0.000 claims description 10
- 238000005260 corrosion Methods 0.000 claims description 10
- 230000007797 corrosion Effects 0.000 claims description 10
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 10
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- OTLNPYWUJOZPPA-UHFFFAOYSA-N 4-nitrobenzoic acid Chemical compound OC(=O)C1=CC=C([N+]([O-])=O)C=C1 OTLNPYWUJOZPPA-UHFFFAOYSA-N 0.000 claims description 5
- 239000005711 Benzoic acid Substances 0.000 claims description 5
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 5
- 229930195725 Mannitol Natural products 0.000 claims description 5
- BNUHAJGCKIQFGE-UHFFFAOYSA-N Nitroanisol Chemical compound COC1=CC=C([N+]([O-])=O)C=C1 BNUHAJGCKIQFGE-UHFFFAOYSA-N 0.000 claims description 5
- 229920001131 Pulp (paper) Polymers 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 235000010233 benzoic acid Nutrition 0.000 claims description 5
- BNMJSBUIDQYHIN-UHFFFAOYSA-N butyl dihydrogen phosphate Chemical compound CCCCOP(O)(O)=O BNMJSBUIDQYHIN-UHFFFAOYSA-N 0.000 claims description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000594 mannitol Substances 0.000 claims description 5
- 235000010355 mannitol Nutrition 0.000 claims description 5
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 4
- TVIDDXQYHWJXFK-UHFFFAOYSA-N dodecanedioic acid Chemical compound OC(=O)CCCCCCCCCCC(O)=O TVIDDXQYHWJXFK-UHFFFAOYSA-N 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- QFGCFKJIPBRJGM-UHFFFAOYSA-N 12-[(2-methylpropan-2-yl)oxy]-12-oxododecanoic acid Chemical compound CC(C)(C)OC(=O)CCCCCCCCCCC(O)=O QFGCFKJIPBRJGM-UHFFFAOYSA-N 0.000 claims description 3
- JKTYGPATCNUWKN-UHFFFAOYSA-N 4-nitrobenzyl alcohol Chemical compound OCC1=CC=C([N+]([O-])=O)C=C1 JKTYGPATCNUWKN-UHFFFAOYSA-N 0.000 claims description 3
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- TWFZGCMQGLPBSX-UHFFFAOYSA-N Carbendazim Natural products C1=CC=C2NC(NC(=O)OC)=NC2=C1 TWFZGCMQGLPBSX-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- JNPZQRQPIHJYNM-UHFFFAOYSA-N carbendazim Chemical compound C1=C[CH]C2=NC(NC(=O)OC)=NC2=C1 JNPZQRQPIHJYNM-UHFFFAOYSA-N 0.000 claims description 2
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- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
The invention discloses a preparation method of a high-voltage aluminum electrolytic capacitor and the capacitor, comprising the following steps: material slitting: cutting the raw material to reach the specified size of the capacitor; riveting and rolling: rolling the cut raw materials into a core of the capacitor on a riveting and rolling machine; and (3) drying: drying the rolled core; impregnation: soaking the dried core in liquid electrolyte; assembling and sealing: adding materials such as an aluminum shell and a cover plate to the impregnated core, riveting positive and negative electrode guide foil strips of the core with a positive electrode leading-out terminal and a negative electrode leading-out terminal led out of the cover plate respectively, and then sealing and molding the core by a crimping machine to isolate a sealing space formed inside the capacitor from the outside; sleeving: sleeving a plastic sleeve on the capacitor formed by sealing; an aging step, etc.
Description
Technical Field
The invention belongs to the technical field of electric appliances, and particularly relates to a high-voltage aluminum electrolytic capacitor and a preparation method thereof.
Background
The capacitor is the most critical component in the electric appliance, and especially in the modern times of increasingly developed science and technology and high intelligence, the capacitor is an essential component in the electric appliance. The aluminum electrolytic capacitor is the most special capacitor in the capacitor family, and the aluminum electrolytic capacitor is highly intelligent, miniaturized, high in power and the like.
The traditional aluminum electrolytic capacitor is divided into low voltage, medium voltage and high voltage, and the highest rated voltage is 450VDC generally. In recent years, with the rapid rise of energy conservation, environmental protection, new energy and the like, the voltage of a module inside a corresponding electric appliance or the output voltage is obviously increased to 500V, 600V, 700V or even more than 1000V. And the demand of capacitors with rated voltage exceeding 450V on the market is increasing day by day, and the voltage of the aluminum electrolytic capacitor is also developing to higher voltage.
At present, the rated voltage of the aluminum electrolytic capacitor is used in electrical appliances by ultrahigh voltage products such as 500V,550V and the like, but the aluminum electrolytic capacitor with the voltage of more than 600V is still not mature in technology. And the use end, because the voltage is too high, often need 2, or 3, even more products to establish ties, can reach required voltage requirement, and the more the electric capacity is established ties, and the influence in the aspect of the adverse factor is just bigger, and wherein the most important is: 1) if the module voltage is not too high, such as within 500V,550V, 600V and the like, if a single capacitor is used, the rated withstand voltage is insufficient, and if more than 2 capacitors are used in series, the design is possibly excessive; 2) when the high-voltage module is used in a module with higher voltage, a plurality of capacitors may be connected in series, voltage division is uneven due to the factors of the capacitors and the parameter difference of the aluminum electrolytic capacitors, part of the capacitors bear higher voltage, the other part of the capacitors bear lower voltage, and products bearing higher voltage exceed the rated voltage bearing capacity, so that the short-term failure or the short-term service life is caused; 3) the stability of the module is reduced, the capacitors are connected in series, and the whole module fails as long as 1 capacitor fails; if the voltage resistance of the capacitors is sufficient, all the capacitors are connected in parallel, and if some capacitor fails, the whole module can still work, and only the output power is reduced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a preparation method of a high-voltage aluminum electrolytic capacitor and the capacitor, and the invention is brief and has the core invention point and technical effect of the specification.
In order to achieve the purpose, the preparation method of the high-voltage aluminum electrolytic capacitor and the specific technical scheme of the capacitor are as follows:
a preparation method of a high-voltage aluminum electrolytic capacitor comprises the following steps:
material slitting: cutting the raw material to reach the specified size of the capacitor;
riveting and rolling: rolling the cut raw materials into a core of the capacitor on a riveting and rolling machine;
and (3) drying: drying the rolled core;
impregnation: soaking the dried core in liquid electrolyte;
assembling and sealing: adding an aluminum shell and a cover plate material to the impregnated core, riveting positive and negative electrode foil strips of the core with a cover plate lead-out positive electrode lead-out terminal and a cover plate lead-out negative electrode lead-out terminal respectively, and then sealing and molding by a curling machine to isolate a sealing space formed inside the capacitor from the outside;
sleeving: sleeving a plastic sleeve on the capacitor formed by sealing;
and (3) aging: applying rated DC voltage and current to the completed product in special equipment to repair the damaged alumina layer of the anode foil in the capacitor at specified temperature for specified time;
a sorting step: and (3) performing 100% full inspection on the electrical property of the aged capacitor, and rejecting products with abnormal performance.
Further, the material slitting step: the anode foil is electrochemically etched by using 1.0-5.0% of inorganic acid to form etching holes with a diameter of 1.0-2.0 μm.
Further, the material slitting step: the anode aluminum foil and the cathode aluminum foil are both corrosion foils which are obtained by corrosion with required specific volume, and the formation foil is prepared by growing an oxide film after the corrosion foils are formed; the formation main material is boric acid water solution, and an alumina protective film which can resist high pressure, has a compact structure and is uniform is formed through multi-stage formation under the temperature condition of the formation liquid.
Further, the material slitting step: the temperature of the formation liquid is 85-95 ℃, and the multi-stage formation grade is 5-7.
Further, the impregnation step: the electrolyte contains an additive which is added into the electrolyte,
the additive comprises the following ingredients in parts by weight: 40-50 parts of ethylene glycol, 10-20 parts of water, 15-25 parts of diethylene glycol, 10-20 parts of polyethylene glycol, 5-10 parts of polyvinyl alcohol and 10-20 parts of boric acid;
the preparation steps of the additive are as follows:
adding 40-50 parts of ethylene glycol and 10-20 parts of water into a container, stirring, heating to 80 +/-5 ℃, and keeping the temperature for 30 +/-5 minutes;
then adding 15-25 parts of diethylene glycol, 10-20 parts of polyethylene glycol and 5-10 parts of polyvinyl alcohol, stirring, heating to 100 +/-5 ℃, preserving heat for 30 +/-5 minutes,
and finally, adding 10-20 parts of boric acid into the container, stirring, heating to 120 +/-5 ℃, preserving heat for 12 +/-0.5 hours, and cooling to below 60 ℃.
Further, the impregnation step: the electrolyte contains an additive which is added into the electrolyte,
the additive comprises the following ingredients in parts by weight: 40-50 parts of ethylene glycol, 15-30 parts of water, 15-25 parts of glycerol, 10-20 parts of polyvinyl alcohol and 10-20 parts of sebacic acid;
adding 40-50 parts of ethylene glycol and 15-30 parts of water into a container, stirring, heating to 80 +/-5 ℃, and keeping the temperature for 30 +/-5 minutes;
then adding 15-25 parts of glycerol and 10-20 parts of polyvinyl alcohol, stirring, heating to 100 +/-5 ℃, preserving heat for 30 +/-5 minutes,
and finally, adding 10-20 parts of sebacic acid into the container, stirring, heating to 120 +/-5 ℃, preserving heat for 12 +/-0.5 hours, and cooling to below 60 ℃.
Further, the impregnation step: the electrolyte contains an additive which is added into the electrolyte,
the additive comprises the following ingredients in parts by weight: 40-50 parts of ethylene glycol, 20-30 parts of water, 15-25 parts of mannitol, 10-20 parts of polyvinyl alcohol and 10-20 parts of octadecenedioic and octadecanoic diacid;
adding 40-50 parts of ethylene glycol and 20-30 parts of water into a container, stirring, heating to 80 +/-5 ℃, and keeping the temperature for 30 +/-5 minutes;
then adding 15-25 parts of mannitol and 10-20 parts of polyvinyl alcohol, stirring, heating to 100 +/-5 ℃, preserving heat for 30 +/-5 minutes,
and finally, adding 10-20 parts of the carbendazim octadecadioic acid into the container, heating to 120 +/-5 ℃, preserving the heat for 12 +/-0.5 hours, and cooling to below 60 ℃.
Further, the impregnation step: the electrolyte comprises the following ingredients in parts by weight: 5-10 parts of triethylamine, 5-10 parts of diethyl carbonate, 5-10 parts of benzoic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of an additive, 0.5-1 part of phosphoric acid, 0.5-2.5 parts of p-nitrobenzoic acid and 5-15 parts of a nano silicon dioxide EG solution;
the electrolyte is prepared by the following steps:
mixing 5-10 parts of triethylamine and 5-10 parts of diethyl carbonate in a container, heating to 160 +/-10 ℃, keeping the temperature for 3 +/-0.5 hours, cooling to normal temperature and normal pressure,
adding 5-10 parts of benzoic acid to react for 30 +/-5 minutes,
adding 40-50 parts of ethylene glycol, heating to 80 +/-5 ℃,
adding 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additives and 0.5-1 part of phosphoric acid, heating to 150 +/-10 ℃, preserving heat for 90 +/-5 minutes, and cooling to 110 +/-5 ℃;
adding 0.5-2.5 parts of p-nitrobenzoic acid, preserving the heat for 10 +/-3 minutes, and cooling to 90 +/-5 ℃;
adding 5-15 parts of nano silicon dioxide EG solution, preserving the temperature for 10 +/-3 minutes, and cooling to below 60 ℃ for use.
Further, the impregnation step: the electrolyte comprises the following ingredients in parts by weight: 5-10 parts of trimethylamine, 3-5 parts of diethyl carbonate, 3-5 parts of ethyl methyl carbonate, 5-15 parts of sebacic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additives, 0.5-1 part of monobutyl phosphate, 0.5-2.5 parts of p-nitrobenzyl alcohol and 5-15 parts of nano silicon dioxide EG solution;
the electrolyte is prepared by the following steps:
mixing 5-10 parts of trimethylamine, 3-5 parts of diethyl carbonate and 3-5 parts of ethyl methyl carbonate in a container, heating to 160 +/-10 ℃, keeping the temperature for 3 +/-0.5 hours when the air pressure reaches 8-15 atmospheres, cooling to the normal temperature and normal pressure state,
adding 5-15 parts of sebacic acid to react for 30 +/-5 minutes,
adding 40-50 parts of glycol, heating to 80 +/-5 ℃,
adding 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additive and 0.5-1 part of monobutyl phosphate, heating to 150 +/-10 ℃, preserving heat for 90 +/-5 minutes, and cooling to 110 +/-5 ℃;
adding 0.5-2.5 parts of p-nitrobenzol, preserving the heat for 10 +/-3 minutes, and cooling to 90 +/-5 ℃;
adding 5-15 parts of nano silicon dioxide EG solution, preserving the temperature for 10 +/-3 minutes, and cooling to below 60 ℃ for use.
Further, the impregnation step: the electrolyte comprises the following ingredients in parts by weight:
5-10 parts of triethanolamine, 5-10 parts of methyl ethyl carbonate, 5-15 parts of dodecanedioic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of an additive, 0.5-1 part of butyl phosphate, 0.5-2.5 parts of p-nitroanisole and 5-15 parts of a nano silicon dioxide EG solution.
The electrolyte is prepared by the following steps:
mixing 5-10 parts of triethanolamine and 5-10 parts of methyl ethyl carbonate in a container, heating to 160 +/-10 ℃, keeping the temperature for 3 +/-0.5 hours until the air pressure reaches 8-15 atmospheric pressures, cooling to normal temperature and normal pressure,
adding 5-15 parts of dodecanedioic acid to react for 30 +/-5 minutes,
adding 40-50 parts of ethylene glycol, heating to 80 +/-5 ℃,
adding 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additive and 0.5-1 part of butyl phosphate, heating to 150 +/-10 ℃, keeping the temperature for 90 +/-5 minutes, and cooling to 110 +/-5 ℃;
adding 0.5-2.5 parts of p-nitroanisole, preserving the heat for 10 +/-3 minutes, and cooling to 90 +/-5 ℃;
adding 5-15 parts of nano silicon dioxide EG solution, preserving the temperature for 10 +/-3 minutes, and cooling to below 60 ℃ for use.
Further, the electrolytic paper contained in the raw material is subjected to multi-stage purification and cylinder mould manufacturing processes, and the steps are as follows:
refining and purifying: carrying out multi-stage purification on the electrolytic paper raw material;
pulping: the electrolytic paper raw material is scattered, ground and branched, so that the paper pulp has more binding force;
papermaking: the electrolytic paper is made by long net or round net, and is compounded;
and (3) drying: removing part of water by adopting a narrowing mode, and drying the electrolytic paper by adopting a steam mode;
paper rolling: and winding the dried electrolytic paper into a paper roll with a specified size, and packaging.
Further, papermaking: the paper pulp with the low concentration of 0.1-0.3% is made through a net part, the low-density electrolytic paper is made through a cylinder net, the high-density electrolytic paper is made through a fourdrinier net, the electrolytic paper is formed by compounding the electrolytic paper made through the cylinder net and the fourdrinier net, and the paper pulp has high voltage resistance and low resistivity.
A capacitor manufactured by the method for manufacturing the high-voltage aluminum electrolytic capacitor comprises the following steps: the electrolytic paper is characterized in that a core is formed by sequentially overlapping and rolling a cathode foil, electrolytic paper and an anode foil, an aluminum shell is sleeved outside the core, a cover plate is connected with an opening of the aluminum shell, a sleeve is sleeved outside the aluminum shell, and a positive leading-out terminal and a negative leading-out terminal are led out of the core and penetrate out of the cover plate.
Compared with the prior art, the invention has the following beneficial effects:
1) the direct current voltage circuit can bear the impact of ultrahigh voltage, the effective value of the voltage is within 600V, the peak voltage is within 650V, and the application range of the aluminum electrolytic capacitor in the aspect of high voltage is expanded.
2) The problem of 500 ~ 600V need use 2 electric capacity series connections before having solved, the design is excessive, 1200V need use 3 electric capacity series connections, also can fall 2 series connections can, reduced the uneven risk of voltage distribution to the probability of failure of electric capacity and even whole equipment has been reduced.
3) The power supply can provide power for new energy modules and electrical appliances with ultrahigh voltage requirements, and the power supply can be controlled stably, reliably and accurately for a long time, and has a service life of more than 6 years.
Drawings
FIG. 1 is a flow chart of a method for manufacturing a high-voltage aluminum electrolytic capacitor according to the present invention;
FIG. 2 is a structural view of a capacitor obtained by the manufacturing method of the present invention.
The reference numbers in the figures illustrate: the electrolytic cell comprises a core 1, an aluminum shell 2, a cover plate 3, a sleeve 4, electrolytic paper 5, a cathode foil 6, an anode foil 7, a positive electrode leading-out terminal 8 and a negative electrode leading-out terminal 9.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following will describe a method for manufacturing a high voltage aluminum electrolytic capacitor and the capacitor of the present invention in detail with reference to fig. 1-2.
As shown in fig. 2, a capacitor manufactured by the above method for manufacturing a high-voltage aluminum electrolytic capacitor includes: the core 1 is formed by sequentially overlapping and rolling a cathode foil 6, electrolytic paper 5 and an anode foil 7, an aluminum shell 2 is sleeved outside the core 1, a cover plate 3 connected with an opening of the aluminum shell 2 and a sleeve 4 sleeved outside the aluminum shell 2, and a positive lead-out terminal 8 and a negative lead-out terminal 9 are led out of the core 1 and penetrate out of the cover plate 3. Capacitor structural design has adopted electrified voltage negative pole paper tinsel, two to lead foil strip, ultrasonic spot welding, promotes capacitor's current bearing capacity and product reliability. And secondary welding is adopted between the foil guide strip and the leading-out terminal of the cover plate 3, so that the riveting resistance is reduced, and the conductive capacity of the contact part is improved.
The technological process for preparing the capacitor is shown in figure 1, and the invention provides a preparation method of a high-voltage aluminum electrolytic capacitor, which comprises the following steps:
1) slitting materials: according to the design requirement, various suitable raw materials are selected, including the anode foil 7, the cathode foil 6 and the electrolytic paper 5, and the raw materials are cut according to the required width so as to be beneficial to reaching the specified size of the capacitor. The anode aluminum foil and the cathode aluminum foil are both corrosion foils which are obtained by corrosion with required specific volume, and the formation foil is prepared by growing an oxide film after the corrosion foils are formed; the formation main material is boric acid water solution, and an alumina protective film which can resist high pressure, has a compact structure and is uniform is formed through multi-stage formation under the temperature condition of the formation liquid; the temperature of the formation liquid is 85-95 ℃, and the multi-stage formation grade is 5-7.
2) Riveting and rolling: the anode foil 7, the cathode foil 6 and the electrolytic paper 5 which are cut in the front are added with (positive and negative) foil guiding strips, adhesive tapes and the like, and the mixture is rolled into the heart of the capacitor, namely the core 1, on a riveting and rolling machine.
3) Drying: and (3) putting the core 1 which is coiled in the front into a high-temperature drying box, and removing moisture in the core 1 to prevent the moisture in the material from influencing the performance of the capacitor.
4) Impregnation: the dried core 1 is soaked in liquid electrolyte to produce the expected capacity.
5) Assembling and sealing: adding materials such as an aluminum shell and a cover plate 3 into the impregnated core 1, leading out an aluminum terminal from the core foil guide strip and the cover plate 3 to be riveted, and then sealing and forming the inside of the capacitor through a crimping machine to form a sealing space so as to isolate the small environment inside the capacitor from the outside.
6) Sleeving a sleeve: the plastic sleeve is sleeved on the capacitor with the front sealed and formed, the trademark, the rated voltage, the rated capacity, the temperature and the cathode mark of the capacitor are printed on the sleeve 4, the sleeve 4 mainly plays a role in marking, and in addition, the plastic sleeve can also play an insulating role in abnormal use.
7) Aging: the aluminum oxide layer damaged by the anode foil in the capacitor in the steps of slitting and winding is repaired by adding rated direct current voltage and current to the sleeved product in special equipment at a specified temperature and for a specified time.
8) Sorting: and (3) performing 100% full inspection on the electrical property of the aged capacitor, and rejecting products with abnormal performance.
The main improvement points of the design are as follows:
1) the anode foil of the ultrahigh-voltage soldering lug aluminum electrolytic capacitor has large corrosion holes, and is formed by inorganic acidification, so that the surface alumina of the anode foil has good quality, thicker thickness and strong ultrahigh-voltage bearing capacity, and the maximum voltage can reach 850 VF.
2) The electrolyte of the high-voltage soldering lug aluminum electrolytic capacitor is prepared by adopting a mixed solvent formed by matching various solvents, an ultrahigh voltage long carbon branched chain organic solute, various functional additives and the like through a strict cooking process, and can bear long-term impact of voltage above 650V.
3) The electrolytic paper of the high-voltage soldering lug aluminum electrolytic capacitor adopts a long cylinder manufacturing process and can bear voltage impact more than two times of ultrahigh voltage 600V.
4) The multistage aging mode promotes ageing effect and disposable yields. The soldering lug aluminum electrolytic capacitor can be safely used within the ultrahigh voltage of 600V.
Wherein, the material slitting step: the anode foil is electrochemically etched by using 0.5-10.0% of inorganic acid to form etching holes with a diameter of 1.0-2.0 μm.
Three examples of additives according to the invention
In the additive 1 of the embodiment 1, the ingredients comprise the following components in parts by weight: 40-50 parts of ethylene glycol, 10-20 parts of water, 15-25 parts of diethylene glycol, 10-20 parts of polyethylene glycol, 5-10 parts of polyvinyl alcohol and 10-20 parts of boric acid;
the preparation steps of the additive are as follows:
adding 40-50 parts of ethylene glycol and 10-20 parts of water into a container, stirring, heating to 80 +/-5 ℃, and keeping the temperature for 30 +/-5 minutes;
then adding 15-25 parts of diethylene glycol, 10-20 parts of polyethylene glycol and 5-10 parts of polyvinyl alcohol, stirring, heating to 100 +/-5 ℃, preserving heat for 30 +/-5 minutes,
and finally, adding 10-20 parts of boric acid into the container, stirring, heating to 120 +/-5 ℃, preserving heat for 12 +/-0.5 hours, and cooling to below 60 ℃.
Further, the impregnation step: the electrolyte contains an additive which is added into the electrolyte,
the additive comprises the following ingredients in parts by weight: 40-50 parts of ethylene glycol, 15-30 parts of water, 15-25 parts of glycerol, 10-20 parts of polyvinyl alcohol and 10-20 parts of sebacic acid;
further, the impregnation step: the electrolyte contains an additive which is added into the electrolyte,
the additive comprises the following ingredients in parts by weight: 40-50 parts of ethylene glycol, 20-30 parts of water, 15-25 parts of mannitol, 10-20 parts of polyvinyl alcohol and 10-20 parts of octadecenoic and octadecanoic diacid;
three examples relating to electrolytes of the present invention
Example 1
The electrolyte comprises the following ingredients in parts by weight: 5-10 parts of triethylamine, 5-10 parts of diethyl carbonate, 5-10 parts of benzoic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of an additive, 0.5-1 part of phosphoric acid, 0.5-2.5 parts of p-nitrobenzoic acid and 5-15 parts of a nano silicon dioxide EG solution;
example 2
The electrolyte comprises the following ingredients in parts by weight: 5-10 parts of trimethylamine, 3-5 parts of diethyl carbonate, 3-5 parts of ethyl methyl carbonate, 5-15 parts of sebacic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additives, 0.5-1 part of monobutyl phosphate, 0.5-2.5 parts of p-nitrobenzyl alcohol and 5-15 parts of nano silicon dioxide EG solution;
example 3
The electrolyte comprises the following ingredients in parts by weight:
5-10 parts of triethanolamine, 5-10 parts of ethyl methyl carbonate, 5-15 parts of dodecanedioic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of an additive, 0.5-1 part of butyl phosphate, 0.5-2.5 parts of p-nitroanisole and 5-15 parts of a nano silicon dioxide EG solution.
The electrolytic paper is subjected to multi-stage purification and long cylinder manufacturing process, and the steps are as follows:
refining and purifying: carrying out multi-stage purification on the electrolytic paper raw material;
pulping: breaking up raw materials of the electrolytic paper, grinding and branching to make the paper pulp have more binding force;
papermaking: the electrolytic paper is made by long net or round net, and is compounded;
and (3) drying: removing part of water by adopting a narrowing mode, and drying the electrolytic paper by adopting a steam mode;
paper rolling: and winding the dried electrolytic paper into a paper roll with a specified size, and packaging.
Wherein, papermaking: papermaking with a low concentration of 0.1-0.3% through a wire part, papermaking with a round wire for low-density electrolytic paper, papermaking with a long wire for high-density electrolytic paper, and compounding the electrolytic paper with the round wire and the long wire. The electrolyte paper obtained by the design has good immersion effect, can shorten the soaking time of the electrolyte and improve the soaking penetration degree of the core 1.
The pressure-resistant promotion additive originally designed is characterized in that: the high molecular polymer glycol solution is formed by polymerizing various organic matters including organic solute, solvent and the like at a high temperature of more than 120 +/-5 ℃ for more than 12 +/-0.5 hours, so that the withstand voltage bearing capacity of the electrolyte can be improved to more than 650V for a long time, and the whole voltage bearing capacity can reach more than 650V when the high molecular polymer glycol solution is used in an aluminum electrolytic capacitor;
additive formula proportion example:
note: the formulations in the above tables are in kg by mass.
The preparation method comprises the following steps: in three different embodiments, the materials with the serial number 1 and the serial number 2 are mixed and stirred in a container, the temperature is raised to 80 +/-5 ℃, the temperature is kept for 30 +/-5 minutes, the materials with the serial number 3 and the serial number 4 are added and mixed and stirred, the temperature is raised to 100 +/-5 ℃, the temperature is kept for 30 +/-5 minutes, the materials with the serial number 5 are added and mixed and stirred, the temperature is raised to 120 +/-5 ℃, the temperature is kept for 12 +/-0.5 hours, and the temperature is lowered to below 60 ℃ to complete the preparation.
Comparison of additive Properties
Additive agent | Manufacturer(s) | Withstand voltage (V) | Electrolyte voltage with 5% of |
Additive | |||
1 | Self-made | ≥1000 | |
Additive | |||
2 | Self-made | ≥1000 | |
Additive | |||
3 | Self-made | ≥1000 | 55V |
The following tests confirm that: additive 3 works best.
The method is carried out in a high-temperature high-pressure reaction kettle, wherein in one step of the electrolyte preparation process, materials with lower boiling points are in a gas state at high temperature, a high-pressure kettle is required, the gas pressure reaches 8-15 atmospheric pressures at the temperature of about 160 ℃, the liquid state can be maintained, and a plurality of substances can be uniformly stirred and reacted.
The formula proportion of the embodiment in the ultrahigh-voltage electrolyte 3 is shown in the table:
note: the formulations in the above tables are in kg by mass.
Firstly, the additive is prepared through the steps, the additive 3 is obtained with the best effect, and then the additive 3 is used as a raw material in the preparation of the electrolyte in the next procedure, wherein the preparation process of the electrolyte comprises the following steps:
in the table of the formulations of the examples of the electrolyte solution described above,
firstly, materials No. 1 and No. 2 are mixed in a container, heated to 160 +/-10 ℃ (the air pressure reaches about 8-15 atmospheric pressures), kept for 3 +/-0.5 hours, and cooled to the normal temperature and pressure state;
secondly, after the materials with the sequence number 3 are continuously added, the reaction is carried out for 30 plus or minus 5 minutes;
thirdly, continuously adding the material with the sequence number 4, and heating to 80 +/-5 ℃;
fourthly, continuously adding materials with the serial number of 5 to 9, heating to 150 +/-10 ℃, preserving the heat for 90 +/-5 minutes, and cooling to 110 +/-5 ℃;
fifthly, continuously adding the materials with the serial number of 10, keeping the temperature for 10 +/-3 minutes, and cooling to 90 +/-5 ℃;
sixthly, continuously adding the material with the serial number of 11, preserving the heat for 10 +/-3 minutes, and cooling to below 60 ℃ for use.
The preparation process of the electrolyte is also very critical, and has great influence on the stability of the electrolyte, the ultrahigh voltage bearing capacity and the electrolyte parameters and the performance of the ultrahigh voltage capacitor produced. The first and second steps must be carried out in a high-temperature high-pressure reaction kettle. Tests prove that the formula can achieve the ultralow temperature effect, but the formula 2 and the formula 3 have better effects.
The measured electrolyte parameters of the three examples are compared in the following table.
The electrolyte prepared by the formula of the three embodiments according to the same process has parameters meeting the target requirements, and the formula of the embodiment 3 is also optimal in comprehensive consideration because the electrolyte and the integral voltage resistance of the product are preferentially considered in the ultrahigh-voltage soldering lug aluminum electrolytic capacitor.
Initial lightning voltage: when the voltage resistance of the electrolyte is measured, the voltage displayed on the instrument when the surface of the test piece is in weak flash fire is measured;
maximum sparking voltage: when the withstand voltage of the electrolyte is measured, violent sparks appear on the surface of the test piece, the voltage fluctuation displayed by the measuring instrument reaches more than 20V, and the highest voltage at the moment is basically close to the limit voltage to which the electrolyte can rise.
After the formula is obtained, the technical effect obtained by the method provided by the invention is compared with test data:
1. standard comparison:
2. industry level comparison (test results):
by comparison with the prior art, it is concluded that: compared with domestic products of the same industry, the product of the invention has more obvious advantages, and compared with products of the same industry of Japan, the product has basically consistent performance and service life.
The formation mode of the anode foil is different: in the aspect of anode foil formation, the components of the formation liquid are different, the formation of the ultrahigh-pressure anode foil is carried out by adopting pure boric acid formation liquid, the concentration of the formation liquid is about 3-5%, while the formation of the common anode foil is carried out by adopting organic acid (azelaic acid), and the proportion of the formation liquid is 5-10%.
The aging process is different:
the invention adopts a multi-pole aging mode, and the aging is as follows: and (4) boosting the voltage at normal temperature (to a rated AV value), aging at high temperature for 5-8 hours (keeping the voltage at the rated AV value), confirming the aging effect, discharging and cooling.
The aging mode of the invention is as follows: and (3) boosting the temperature to about 90% of AV value at normal temperature, aging at high temperature for 2-4 hours, recovering the normal temperature boosting to about 95% of AV value, aging at high temperature for 2-4 hours, recovering the normal temperature boosting to 100% of AV value, then maintaining at high temperature for 3-5 hours, discharging and cooling, confirming the effect, and terminating the aging. The purpose is as follows: on the ultrahigh pressure large-scale soldering lug product, the once qualified rate of the ultrahigh pressure product, and the stability, reliability and quality of the product can be ensured to the maximum extent by adopting sectional multiple aging.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (13)
1. A preparation method of a high-voltage aluminum electrolytic capacitor is characterized by comprising the following steps:
material slitting: cutting the raw material to reach the specified size of the capacitor;
riveting and rolling: rolling the cut raw materials into a core of the capacitor on a riveting and rolling machine;
and (3) drying: drying the coiled core;
impregnation: soaking the dried core in liquid electrolyte;
assembling and sealing: adding an aluminum shell and a cover plate material to the impregnated core, riveting positive and negative electrode foil strips of the core with a cover plate lead-out positive electrode lead-out terminal and a cover plate lead-out negative electrode lead-out terminal respectively, and then sealing and molding by a curling machine to isolate a sealing space formed inside the capacitor from the outside;
sleeving: sleeving a plastic sleeve on the capacitor formed by sealing;
and (3) aging: the method comprises the following steps of boosting the pressure of a sleeved product to a 90% AV value at normal temperature, aging at high temperature for 2-4 hours in special equipment, recovering the pressure boosting at the normal temperature to a 95% AV value, aging at high temperature for 2-4 hours, recovering the pressure boosting at the normal temperature to a 100% AV value, then maintaining at high temperature for 3-5 hours, discharging, cooling, confirming the effect, stopping aging, and repairing an alumina layer damaged by an anode foil in a capacitor;
a sorting step: and (3) performing 100% full inspection on the electrical property of the aged capacitor, and rejecting products with abnormal performance.
2. The method for preparing the high-voltage aluminum electrolytic capacitor according to claim 1, wherein the material slitting step comprises the following steps: the anode foil is electrochemically etched by using 0.5-10.0% of inorganic acid to form etching holes with a diameter of 1.0-2.0 μm.
3. The method for preparing the high-voltage aluminum electrolytic capacitor according to claim 1, wherein the material slitting step comprises the following steps: the anode aluminum foil and the cathode aluminum foil are both corrosion foils which are obtained by corrosion with required specific volume, and the formation foil is prepared by growing an oxide film after the corrosion foils are formed;
the formation main material is boric acid water solution, and an alumina protective film which can resist high pressure, has a compact structure and is uniform is formed through multi-stage formation under the temperature condition of the formation liquid.
4. The method for manufacturing a high-voltage aluminum electrolytic capacitor according to claim 3, wherein the material slitting step comprises: the temperature of the formation liquid is 85-95 ℃, and the multi-stage formation grade is 5-7.
5. The method for manufacturing a high-voltage aluminum electrolytic capacitor according to claim 1, wherein the impregnation step comprises: the electrolyte contains an additive which is added into the electrolyte,
the additive comprises the following ingredients in parts by weight: 40-50 parts of ethylene glycol, 10-20 parts of water, 15-25 parts of diethylene glycol, 10-20 parts of polyethylene glycol, 5-10 parts of polyvinyl alcohol and 10-20 parts of boric acid;
the preparation steps of the additive are as follows:
adding 40-50 parts of ethylene glycol and 10-20 parts of water into a container, stirring, heating to 80 +/-5 ℃, and keeping the temperature for 30 +/-5 minutes;
then adding 15-25 parts of diethylene glycol, 10-20 parts of polyethylene glycol and 5-10 parts of polyvinyl alcohol, stirring, heating to 100 +/-5 ℃, preserving heat for 30 +/-5 minutes,
and finally, adding 10-20 parts of boric acid into the container, stirring, heating to 120 +/-5 ℃, preserving heat for 12 +/-0.5 hours, and cooling to below 60 ℃.
6. The method for manufacturing a high-voltage aluminum electrolytic capacitor according to claim 1, wherein the impregnation step comprises: the electrolyte solution contains an additive agent,
the additive comprises the following ingredients in parts by weight: 40-50 parts of ethylene glycol, 15-30 parts of water, 15-25 parts of glycerol, 10-20 parts of polyvinyl alcohol and 10-20 parts of sebacic acid;
adding 40-50 parts of ethylene glycol and 15-30 parts of water into a container, stirring, heating to 80 +/-5 ℃, and keeping the temperature for 30 +/-5 minutes;
then adding 15-25 parts of glycerol and 10-20 parts of polyvinyl alcohol, stirring, heating to 100 +/-5 ℃, preserving heat for 30 +/-5 minutes,
and finally, adding 10-20 parts of sebacic acid into the container, stirring, heating to 120 +/-5 ℃, preserving heat for 12 +/-0.5 hours, and cooling to below 60 ℃.
7. The method for manufacturing a high-voltage aluminum electrolytic capacitor according to claim 1, wherein the impregnation step comprises: the electrolyte solution contains an additive agent,
the additive comprises the following ingredients in parts by weight: 40-50 parts of ethylene glycol, 20-30 parts of water, 15-25 parts of mannitol, 10-20 parts of polyvinyl alcohol and 10-20 parts of octadecenedioic and octadecanoic diacid;
adding 40-50 parts of ethylene glycol and 20-30 parts of water into a container, stirring, heating to 80 +/-5 ℃, and keeping the temperature for 30 +/-5 minutes;
then adding 15-25 parts of mannitol and 10-20 parts of polyvinyl alcohol, stirring, heating to 100 +/-5 ℃, preserving heat for 30 +/-5 minutes,
and finally, adding 10-20 parts of the carbendazim octadecadioic acid into the container, heating to 120 +/-5 ℃, preserving the heat for 12 +/-0.5 hours, and cooling to below 60 ℃.
8. The method for manufacturing a high-voltage aluminum electrolytic capacitor according to claim 1, wherein the impregnation step comprises: the electrolyte comprises the following ingredients in parts by weight: 5-10 parts of triethylamine, 5-10 parts of diethyl carbonate, 5-10 parts of benzoic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of an additive, 0.5-1 part of phosphoric acid, 0.5-2.5 parts of p-nitrobenzoic acid and 5-15 parts of a nano silicon dioxide EG solution;
the electrolyte is prepared by the following steps:
mixing 5-10 parts of triethylamine and 5-10 parts of diethyl carbonate in a container, heating to 160 +/-10 ℃, keeping the temperature for 3 +/-0.5 hours, cooling to normal temperature and normal pressure,
adding 5-10 parts of benzoic acid to react for 30 +/-5 minutes,
adding 40-50 parts of glycol, heating to 80 +/-5 ℃,
adding 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additive and 0.5-1 part of phosphoric acid, heating to 150 +/-10 ℃, preserving heat for 90 +/-5 minutes, and cooling to 110 +/-5 ℃;
adding 0.5-2.5 parts of p-nitrobenzoic acid, preserving the heat for 10 +/-3 minutes, and cooling to 90 +/-5 ℃;
adding 5-15 parts of nano silicon dioxide EG solution, preserving the temperature for 10 +/-3 minutes, and cooling to below 60 ℃ for use.
9. The method for manufacturing a high-voltage aluminum electrolytic capacitor according to claim 1, wherein the impregnation step comprises: the electrolyte comprises the following ingredients in parts by weight: 5-10 parts of trimethylamine, 3-5 parts of diethyl carbonate, 3-5 parts of ethyl methyl carbonate, 5-15 parts of sebacic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additives, 0.5-1 part of monobutyl phosphate, 0.5-2.5 parts of p-nitrobenzyl alcohol and 5-15 parts of nano silicon dioxide EG solution;
the electrolyte is prepared by the following steps:
mixing 5-10 parts of trimethylamine, 3-5 parts of diethyl carbonate and 3-5 parts of ethyl methyl carbonate in a container, heating to 160 +/-10 ℃, keeping the temperature for 3 +/-0.5 hours when the air pressure reaches 8-15 atmospheres, cooling to the normal temperature and normal pressure state,
adding 5-15 parts of sebacic acid to react for 30 +/-5 minutes,
adding 40-50 parts of glycol, heating to 80 +/-5 ℃,
adding 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additive and 0.5-1 part of monobutyl phosphate, heating to 150 +/-10 ℃, preserving heat for 90 +/-5 minutes, and cooling to 110 +/-5 ℃;
adding 0.5-2.5 parts of p-nitrobenzol, preserving the heat for 10 +/-3 minutes, and cooling to 90 +/-5 ℃;
adding 5-15 parts of nano silicon dioxide EG solution, preserving the temperature for 10 +/-3 minutes, and cooling to below 60 ℃ for use.
10. The method for manufacturing a high-voltage aluminum electrolytic capacitor according to claim 1, wherein the impregnation step comprises: the electrolyte comprises the following ingredients in parts by weight:
5-10 parts of triethanolamine, 5-10 parts of methyl ethyl carbonate, 5-15 parts of dodecanedioic acid, 40-50 parts of ethylene glycol, 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of an additive, 0.5-1 part of butyl phosphate, 0.5-2.5 parts of p-nitroanisole and 5-15 parts of a nano silicon dioxide EG solution;
the electrolyte is prepared by the following steps:
mixing 5-10 parts of triethanolamine and 5-10 parts of methyl ethyl carbonate in a container, heating to 160 +/-10 ℃, keeping the temperature for 3 +/-0.5 hours until the air pressure reaches 8-15 atmospheric pressures, cooling to normal temperature and normal pressure,
adding 5-15 parts of dodecanedioic acid to react for 30 +/-5 minutes,
adding 40-50 parts of ethylene glycol, heating to 80 +/-5 ℃,
adding 10-20 parts of ammonium dodecanedioate, 8-15 parts of ammonium sebacate, 1-3 parts of ammonium pentaborate, 5-15 parts of additive and 0.5-1 part of butyl phosphate, heating to 150 +/-10 ℃, keeping the temperature for 90 +/-5 minutes, and cooling to 110 +/-5 ℃;
adding 0.5-2.5 parts of p-nitroanisole, preserving the heat for 10 +/-3 minutes, and cooling to 90 +/-5 ℃;
adding 5-15 parts of nano silicon dioxide EG solution, preserving the temperature for 10 +/-3 minutes, and cooling to below 60 ℃ for use.
11. The method for preparing the high-voltage aluminum electrolytic capacitor according to claim 1, wherein the electrolytic paper contained in the raw material is subjected to multi-stage purification and cylinder mould manufacturing processes, and the steps are as follows:
refining and purifying: carrying out multi-stage purification on the electrolytic paper raw material;
pulping: breaking up raw materials of the electrolytic paper, grinding and branching to make the paper pulp have more binding force;
papermaking: the electrolytic paper is made by long net or round net, and is compounded;
and (3) drying: removing part of water by adopting a narrowing mode, and drying the electrolytic paper by adopting a steam mode;
paper rolling: and winding the dried electrolytic paper into a paper roll with a specified size, and packaging.
12. The method for preparing a high-voltage aluminum electrolytic capacitor according to claim 11, wherein the papermaking: papermaking with a low concentration of 0.1-0.3% through a wire part, papermaking with a round wire for low-density electrolytic paper, papermaking with a long wire for high-density electrolytic paper, and compounding the electrolytic paper with the round wire and the long wire.
13. A capacitor manufactured by the method for manufacturing a high-voltage aluminum electrolytic capacitor according to any one of claims 1 to 12, wherein the capacitor comprises: the electrolytic paper is characterized in that a core is formed by sequentially overlapping and rolling a cathode foil, electrolytic paper and an anode foil, an aluminum shell is sleeved outside the core, a cover plate is connected with an opening of the aluminum shell, a sleeve is sleeved outside the aluminum shell, and a positive leading-out terminal and a negative leading-out terminal are led out of the core and penetrate out of the cover plate.
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