CN109192516A - A kind of 700V ultra-high voltage aluminum electrolytic capacitor - Google Patents
A kind of 700V ultra-high voltage aluminum electrolytic capacitor Download PDFInfo
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- CN109192516A CN109192516A CN201810753352.2A CN201810753352A CN109192516A CN 109192516 A CN109192516 A CN 109192516A CN 201810753352 A CN201810753352 A CN 201810753352A CN 109192516 A CN109192516 A CN 109192516A
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- high voltage
- ultra
- aluminum electrolytic
- electrolytic capacitor
- core packet
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- 239000003990 capacitor Substances 0.000 title claims abstract description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 32
- 239000011888 foil Substances 0.000 claims abstract description 59
- 239000003792 electrolyte Substances 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 47
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 32
- 239000002904 solvent Substances 0.000 claims description 32
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 30
- 239000000654 additive Substances 0.000 claims description 22
- 239000002202 Polyethylene glycol Substances 0.000 claims description 14
- 229920001223 polyethylene glycol Polymers 0.000 claims description 14
- 229910019142 PO4 Inorganic materials 0.000 claims description 11
- 239000004327 boric acid Substances 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 11
- 239000010452 phosphate Substances 0.000 claims description 11
- 229920000728 polyester Polymers 0.000 claims description 11
- -1 polyoxypropylene Polymers 0.000 claims description 11
- 229920001451 polypropylene glycol Polymers 0.000 claims description 11
- JKTYGPATCNUWKN-UHFFFAOYSA-N 4-nitrobenzyl alcohol Chemical compound OCC1=CC=C([N+]([O-])=O)C=C1 JKTYGPATCNUWKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000005725 8-Hydroxyquinoline Substances 0.000 claims description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 10
- 229940067597 azelate Drugs 0.000 claims description 10
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 10
- 229960003540 oxyquinoline Drugs 0.000 claims description 10
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 10
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 claims description 10
- 244000025254 Cannabis sativa Species 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- FJJTTZOOICZCMI-UHFFFAOYSA-N 2,7-dibutyloctanedioic acid Chemical compound CCCCC(C(O)=O)CCCCC(C(O)=O)CCCC FJJTTZOOICZCMI-UHFFFAOYSA-N 0.000 claims description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 6
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 5
- 125000005619 boric acid group Chemical group 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 229920001427 mPEG Polymers 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 235000005979 Citrus limon Nutrition 0.000 claims 2
- 244000131522 Citrus pyriformis Species 0.000 claims 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims 2
- XUZLXCQFXTZASF-UHFFFAOYSA-N nitro(phenyl)methanol Chemical compound [O-][N+](=O)C(O)C1=CC=CC=C1 XUZLXCQFXTZASF-UHFFFAOYSA-N 0.000 claims 1
- 239000004411 aluminium Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 description 8
- 239000000306 component Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G9/04—Electrodes or formation of dielectric layers thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G9/07—Dielectric layers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a kind of 700V ultra-high voltage aluminum electrolytic capacitors, lid including being provided with the shell of opening and for sealing the opening, core packet is provided in the shell, the core packet is soaked with electrolyte, the core packet includes the Cathode Foil and anode foils of stacking, and the same side of Cathode Foil and anode foils is respectively arranged with the electrolytic paper as substrate；The resistance to of the anode foils is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF or more；The flash over voltage of the electrolyte is in 850V or more, heat resistance up to 115 DEG C；The tightness of the electrolytic paper is not less than 0.95g/cm3.Pass through the improvement to process conditions, overall coordination, make ultra-high voltage aluminum electrolytic capacitor proof voltage up to 700V, heat resistance up to 115 DEG C, big size capacitor, which can not only be produced, also can produce the capacitor of miniature dimensions, current miniaturization, the requirement of high voltage, high temperature, high ripple, the aluminium electrolutic capacitor of long-life are better met, client's production cost is reduced.
Description
Technical field
The present invention relates to capacitor technology fields, more particularly to a kind of 700V ultra-high voltage aluminum electrolytic capacitor.
Background technique
The operating voltage of aluminium electrolutic capacitor is generally 6.3 ~ 500V at present, and only a few producer can produce 600V's or more
Aluminium electrolutic capacitor, 700V extra-high voltage electrolytic capacitor are even more rare.It can be seen that 600V alminium electrolytic condenser technology on international market
It is not yet mature, and the research of 600V or more superelevation die pressing product is still in infancy.Aluminium electrolutic capacitor highest on domestic market
The product of nominal operating voltage is the 700V product of good (cectn) the company FE26 series of triumphant fine jade, is Chemi-con on international market
The 700V product of company RHB series belongs to large-sized screw-type aluminium electrolutic capacitor, is suitable for industrial frequency transformer, communication
Power supply and large industry equipment.
Industrial power class product has to that low pressure-resistant alminium electrolytic condenser is used to connect to substitute the resistance to piezoelectricity of superelevation mostly at present
Hold, such design is suitable for small ripple current operating circuit, and circuit total impedance is high, and loss is more serious, undoubtedly reduces such
The stability and service life of product.
The product market demand is very big at present, researchs and develops 700V extra-high voltage electrolytic capacitor, increases enterprise work
Post, income from sales and local tax revenue, improve the technical level of domestic capacitor industry, shorten the difference with Foreign Advanced Lerel
Away from the further development of promotion nationality of China electronic component industry.
Summary of the invention
In order to make up the defect of prior art, the present invention provides a kind of 700V ultra-high voltage aluminum electrolytic capacitor.
The technical problems to be solved by the invention are achieved by the following technical programs:
A kind of 700V ultra-high voltage aluminum electrolytic capacitor, the lid including being provided with the shell of opening and for sealing the opening,
Core packet is provided in the shell, the core packet is soaked with electrolyte, and the core packet includes the Cathode Foil and anode foils of stacking, cathode
The same side of foil and anode foils is respectively arranged with the electrolytic paper as substrate, and lid is provided with the anode with anode foils nail joint
Guide pin and with the negative electrode guide needle of Cathode Foil nail joint or be provided with through lid and lead chaff and and cathode with the anode of anode foils nail joint
The cathode of foil nail joint leads chaff；The resistance to of the anode foils is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF or more；The electrolyte
Flash over voltage in 850V or more, heat resistance up to 115 DEG C；The tightness of the electrolytic paper is not less than 0.95g/cm3。
Further, the core include leaching electrolyte after assembled between the shell, lid time control 2h with
It is interior；Gap is equipped between the shell and core packet.
Further, the diameter of the core packet is not more than 25mm, and the volume in the gap is not less than the enclosure interior body
Long-pending 12%.
Further, the diameter of the core packet is greater than 25mm, and the volume in the gap is not less than the enclosure interior volume
20%.
Further, the positive guide pin and negative electrode guide needle pressure resistance 800V or more；The anode leads chaff and cathode leads foil
Item pressure resistance 800V or more.
Further, the material of the electrolytic paper is Spanish grass (Esparto).
Further, the electrolyte include the main solvent of 30%-48%, the secondary solvent of 10%-38%, 20%-28% it is molten
Other additives of matter, the flash over voltage elevator of 10%-12% and 1.2%-2%, each component total 100%.
Further, the main solvent is diethylene glycol (DEG) and polyglyceryl ether, and the mass ratio of the two is 2:1；The secondary solvent
For methoxy poly (ethylene glycol) and ethylene carbonate, the mass ratio of the two is 1:1；The solute is ammonium azelate, 2,7- dibutyl
Suberic acid and cetyl diacid, wherein the mass ratio of ammonium azelate, 2,7- dibutyl suberic acid and cetyl diacid is 1:
2:1。
Further, the flash over voltage elevator be boric acid polyester gel, polyoxypropylene polyglyceryl ether and citric acid,
In, the mass ratio of boric acid polyester gel, polyoxypropylene polyglyceryl ether and citric acid is 4:1:2.
Further, other additives be p nitrobenzyl alcohol, polyethylene glycol phosphate and 8-hydroxyquinoline, wherein
The mass ratio of p nitrobenzyl alcohol, polyethylene glycol phosphate and 8-hydroxyquinoline is 3:1:2.
The invention has the following beneficial effects:
The resistance to of the anode foils of ultra-high voltage aluminum electrolytic capacitor of the invention is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF or more；
By reasonable selection electrolyte solvent, solute and additive, reach the flash over voltage of electrolyte in 850V or more, heat resistance
115℃；Electrolytic paper uses double-layer structure, and the tightness of the electrolytic paper is not less than 0.95g/cm3, by changing to process conditions
Into overall coordination makes ultra-high voltage aluminum electrolytic capacitor proof voltage up to 700V, heat resistance up to 115 DEG C, can not only produce large-scale ruler
Very little capacitor can also produce the capacitor of miniature dimensions, better meet current miniaturization, high voltage, high temperature, high ripple, long-life
The requirement of aluminium electrolutic capacitor reduces client's production cost.
Specific embodiment
Core component of the electrolyte as aluminium electrolutic capacitor, service life, reliability and the corresponding electricity of capacitor
The parameter that gasifies is all closely bound up with electrolyte, and the superiority and inferiority of performance directly influences the height of capacitor product quality.It is existing
The flash over voltage of electrolyte is up to 700V, and short-circuit breakdown will occur for the electrolytic capacitor for 700V extra-high voltage, it is difficult to
Meets the needs of ultra-high voltage aluminum electrolytic capacitor.The present inventor improves the formula of electrolyte, to what is added in electrolyte
Solute, solvent, flash over voltage elevator and other additives component carried out screening design, improve its high voltage withstanding performance.
The dosage of additive in the electrolytic solution is few, but plays a very important role to the performance improvement of electrolyte.It is different
The electrolysis additive role of system is not identical, with system with additive effect played in different preparing process
Also it is not quite similar, therefore, influence of the additive to electrolyte is very delicate, complicated.The existing additive types for electrolyte
Various, the present inventor screens a large amount of additive, optimizes, so that screening is determined to be suitble to addition adding in the present invention
The type for adding agent is boric acid polyester gel, polyoxypropylene polyglyceryl ether, citric acid, p nitrobenzyl alcohol, polyethylene glycol phosphate
And 8-hydroxyquinoline.The present invention selects above-mentioned additive, and Reasonable Regulation And Control dosage, can form synergistic effect, substantially improve electrolysis
The performance of liquid makes the flash over voltage of aluminum electrolytic capacitor electrolyte in 850V or more, heat resistance up to 115 DEG C.
By the multiple experimental study of inventor, using the specific electrolyte of the present invention, while in Cathode Foil and anode foils
Same side be respectively arranged with the electrolytic paper as substrate, the tightness of electrolytic paper is not less than 0.95g/cm3, can be improved to electrolysis
The adsorption capacity of liquid improves the pressure-resistant voltge surge ability of product.
In the present invention, the resistance to of anode foils is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF or more, enhances electrolyte in oxygen
Change the compatibility in film, improve the electrical property of oxidation film, the two cooperation improves the performance of the resistance to high ripple of capacitor.
In the present invention, the anode guide pin and negative electrode guide needle pressure resistance 800V or more；Alternatively, the anode leads chaff and cathode
Lead chaff pressure resistance 800V or more.By above-mentioned setting, enhances guide pin or lead anti-chemistry corruption of the chaff in the capacitor course of work
The ability of erosion reduces steam discharge.
The core includes to control within 2h the time assembled between the shell, lid after soaking.The present invention controls core
It include the built-up time after leaching, it is preferable that built-up time controlled in 2 hours, prevents core packet to be exposed in overall situation and absorbs sky
Moisture in gas destroys the stability of electrolyte；It prevents when hot operation because moisture evaporation makes capacitor internal saturated vapor
Pressure increases and explosion-proof valve is caused to be heaved.
Gap is equipped between the shell and core packet.Preferably, the diameter of the core packet is not more than 25mm, the gap
Volume is not less than the 12% of the enclosure interior volume.It is highly preferred that the diameter of the core packet is greater than 25mm, the body in the gap
Product is not less than the 20% of the enclosure interior volume.The present invention regulates and controls the volume in gap according to the diameter of core packet, so that electric when high temperature
Saturated vapor drops inside container are prevented because of explosion-proof valve drum caused by increasing capacitor internal saturated vapor pressure when high temperature
It rises.
It is appreciated that the solution have the advantages that the summation of each step technique feature synergistic effect, between each step
With certain inherent correlation, the simple superposition of not single technical characteristic effect.The present invention is electrolysed by (1) reasonable selection
The component of liquid solvent, solute, flash over voltage elevator and other additives so that the flash over voltage of electrolyte 850V or more,
Heat resistance is up to 115 DEG C；(2) electrolytic paper uses double-layer structure, and the tightness of the electrolytic paper is not less than 0.95g/cm3；(3) anode
The resistance to of foil is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF or more；Effectively improve the high-voltage resistance capability of aluminium electrolutic capacitor, this hair
The said effect of bright generation be mutually cooperate with it is obtained, be it is indivisible, produce the effect that 1+1+1 is far longer than 3.
The present invention will now be described in detail with reference to examples, and the examples are only preferred embodiments of the present invention,
It is not limitation of the invention.
Embodiment 1
A kind of 700V ultra-high voltage aluminum electrolytic capacitor, the lid including being provided with the shell of opening and for sealing the opening,
Core packet is provided in the shell, the core packet is soaked with electrolyte, and the core packet includes the Cathode Foil and anode foils of stacking, cathode
The same side of foil and anode foils is respectively arranged with the electrolytic paper as substrate, and lid is provided with the anode with anode foils nail joint
Guide pin and negative electrode guide needle with Cathode Foil nail joint；The resistance to of the anode foils is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF or more；
The flash over voltage of the electrolyte is in 850V or more, heat resistance up to 115 DEG C；The tightness of the electrolytic paper is not less than 0.95g/
cm3, the material of the electrolytic paper is Spanish grass (Esparto).
The core includes to soak the time control assembled between the shell, lid after electrolyte within 2h；The shell
Gap is equipped between body and core packet；The diameter of the core packet is not more than 25mm, and the volume in the gap is not less than in the shell
The 12% of portion's volume.
The anode guide pin and negative electrode guide needle pressure resistance 800V or more.
The electrolyte includes 40% main solvent, 25% secondary solvent, 22.5% solute, the promotion of 11% flash over voltage
Agent and 1.5% other additives, each component total 100%.
Wherein, the main solvent is diethylene glycol (DEG) and polyglyceryl ether, and the mass ratio of the two is 2:1；The secondary solvent is first
Oxygroup polyethylene glycol and ethylene carbonate, the mass ratio of the two are 1:1；The solute is ammonium azelate, 2,7- dibutyl pungent two
Acid and cetyl diacid, wherein the mass ratio of ammonium azelate, 2,7- dibutyl suberic acid and cetyl diacid is 1:2:1；
The flash over voltage elevator is boric acid polyester gel, polyoxypropylene polyglyceryl ether and citric acid, wherein boric acid polyester gel,
The mass ratio of polyoxypropylene polyglyceryl ether and citric acid is 4:1:2；Other additives are p nitrobenzyl alcohol, polyethylene glycol
Phosphate and 8-hydroxyquinoline, wherein the mass ratio of p nitrobenzyl alcohol, polyethylene glycol phosphate and 8-hydroxyquinoline is 3:1:
2。
The electrolyte the preparation method comprises the following steps: main solvent and secondary solvent first 1) are heated to 80 DEG C；2) in above-mentioned solvent
Middle addition solute；3) solution is continued to be heated to 145 DEG C；4) flash over voltage elevator is added and other additives is allowed to complete
Dissolution；5) natural cooling.
Embodiment 2
A kind of 700V ultra-high voltage aluminum electrolytic capacitor, the lid including being provided with the shell of opening and for sealing the opening,
Core packet is provided in the shell, the core packet is soaked with electrolyte, and the core packet includes the Cathode Foil and anode foils of stacking, cathode
The same side of foil and anode foils is respectively arranged with the electrolytic paper as substrate, and lid is provided with the anode with anode foils nail joint
It leads chaff and leads chaff with the cathode of Cathode Foil nail joint；The resistance to of the anode foils is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF
More than；The flash over voltage of the electrolyte is in 850V or more, heat resistance up to 115 DEG C；The tightness of the electrolytic paper is not less than
0.95g/cm3, the material of the electrolytic paper is Spanish grass (Esparto).
The core includes to soak the time control assembled between the shell, lid after electrolyte within 2h；The shell
Gap is equipped between body and core packet；The diameter of the core packet is greater than 25mm, and the volume in the gap is not less than the enclosure interior
The 20% of volume.
The anode leads chaff and cathode leads chaff pressure resistance 800V or more.
The material of the electrolytic paper is Spanish grass (Esparto).
The electrolyte includes 30% main solvent, 28% secondary solvent, 28% solute, the promotion of 12% flash over voltage
Agent and 2% other additives, each component total 100%.
Wherein, the main solvent is diethylene glycol (DEG) and polyglyceryl ether, and the mass ratio of the two is 2:1；The secondary solvent is first
Oxygroup polyethylene glycol and ethylene carbonate, the mass ratio of the two are 1:1；The solute is ammonium azelate, 2,7- dibutyl pungent two
Acid and cetyl diacid, wherein the mass ratio of ammonium azelate, 2,7- dibutyl suberic acid and cetyl diacid is 1:2:1；
The flash over voltage elevator is boric acid polyester gel, polyoxypropylene polyglyceryl ether and citric acid, wherein boric acid polyester gel,
The mass ratio of polyoxypropylene polyglyceryl ether and citric acid is 4:1:2；Other additives are p nitrobenzyl alcohol, polyethylene glycol
Phosphate and 8-hydroxyquinoline, wherein the mass ratio of p nitrobenzyl alcohol, polyethylene glycol phosphate and 8-hydroxyquinoline is 3:1:
2。
The electrolyte the preparation method comprises the following steps: main solvent and secondary solvent first 1) are heated to 70 DEG C；2) in above-mentioned solvent
Middle addition solute；3) solution is continued to be heated to 140 DEG C；4) flash over voltage elevator is added and other additives is allowed to complete
Dissolution；5) natural cooling.
Embodiment 3
A kind of 700V ultra-high voltage aluminum electrolytic capacitor, the lid including being provided with the shell of opening and for sealing the opening,
Core packet is provided in the shell, the core packet is soaked with electrolyte, and the core packet includes the Cathode Foil and anode foils of stacking, cathode
The same side of foil and anode foils is respectively arranged with the electrolytic paper as substrate, and lid is provided with the anode with anode foils nail joint
Guide pin and negative electrode guide needle with Cathode Foil nail joint；The resistance to of the anode foils is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF or more；
The flash over voltage of the electrolyte is in 850V or more, heat resistance up to 115 DEG C；The tightness of the electrolytic paper is not less than 0.95g/
cm3, the material of the electrolytic paper is Spanish grass (Esparto).
The core includes to soak the time control assembled between the shell, lid after electrolyte within 2h；The shell
Gap is equipped between body and core packet；The diameter of the core packet is not more than 25mm, and the volume in the gap is not less than in the shell
The 12% of portion's volume.
The anode guide pin and negative electrode guide needle pressure resistance 800V or more.
The material of the electrolytic paper is Spanish grass (Esparto).
The electrolyte includes 48% main solvent, 20% secondary solvent, 20.8% solute, the promotion of 10% flash over voltage
Agent and 1.2% other additives, each component total 100%.
Wherein, the main solvent is diethylene glycol (DEG) and polyglyceryl ether, and the mass ratio of the two is 2:1；The secondary solvent is first
Oxygroup polyethylene glycol and ethylene carbonate, the mass ratio of the two are 1:1；The solute is ammonium azelate, 2,7- dibutyl pungent two
Acid and cetyl diacid, wherein the mass ratio of ammonium azelate, 2,7- dibutyl suberic acid and cetyl diacid is 1:2:1；
The flash over voltage elevator is boric acid polyester gel, polyoxypropylene polyglyceryl ether and citric acid, wherein boric acid polyester gel,
The mass ratio of polyoxypropylene polyglyceryl ether and citric acid is 4:1:2；Other additives are p nitrobenzyl alcohol, polyethylene glycol
Phosphate and 8-hydroxyquinoline, wherein the mass ratio of p nitrobenzyl alcohol, polyethylene glycol phosphate and 8-hydroxyquinoline is 3:1:
2。
The electrolyte the preparation method comprises the following steps: main solvent and secondary solvent first 1) are heated to 90 DEG C；2) in above-mentioned solvent
Middle addition solute；3) solution is continued to be heated to 155 DEG C；4) flash over voltage elevator is added and other additives is allowed to complete
Dissolution；5) natural cooling.
Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as, as long as skill obtained in the form of equivalent substitutions or equivalent transformations
Art scheme should all be fallen within the scope and spirit of the invention.
Claims (10)
1. a kind of 700V ultra-high voltage aluminum electrolytic capacitor, the lid including being provided with the shell of opening and for sealing the opening
Body is provided with core packet in the shell, and the core packet is soaked with electrolyte, and the core packet includes the Cathode Foil and anode foils of stacking,
The same side of Cathode Foil and anode foils is respectively arranged with the electrolytic paper as substrate, is provided with and anode foils nail joint through lid
Positive guide pin and with the negative electrode guide needle of Cathode Foil nail joint or through lid be provided with the anode of anode foils nail joint lead chaff and with
The cathode of Cathode Foil nail joint leads chaff；The resistance to of the anode foils is pressed in 1KV or more, and the resistance to of Cathode Foil is pressed in 7VF or more；The electricity
The flash over voltage of solution liquid is in 850V or more, heat resistance up to 115 DEG C；The tightness of the electrolytic paper is not less than 0.95g/cm3。
2. 700V ultra-high voltage aluminum electrolytic capacitor as described in claim 1, which is characterized in that the core includes after soaking electrolyte
The time assembled between the shell, lid controls within 2h；Gap is equipped between the shell and core packet.
3. 700V ultra-high voltage aluminum electrolytic capacitor as claimed in claim 2, which is characterized in that the diameter of the core packet is not more than
25mm, the volume in the gap are not less than the 12% of the enclosure interior volume.
4. 700V ultra-high voltage aluminum electrolytic capacitor as claimed in claim 3, which is characterized in that the diameter of the core packet is greater than
25mm, the volume in the gap are not less than the 20% of the enclosure interior volume.
5. 700V ultra-high voltage aluminum electrolytic capacitor as described in claim 1, which is characterized in that the anode guide pin and cathode are led
Needle pressure resistance 800V or more；Alternatively, the anode leads chaff and cathode leads chaff pressure resistance 800V or more.
6. 700V ultra-high voltage aluminum electrolytic capacitor as described in claim 1, which is characterized in that the material of the electrolytic paper is west
Class's tooth grass.
7. 700V ultra-high voltage aluminum electrolytic capacitor as described in claim 1, which is characterized in that the electrolyte includes 30%-
48% main solvent, the secondary solvent of 10%-38%, the solute of 20%-28%, 10%-12% flash over voltage elevator and 1.2%-2%
Other additives, each component total 100%.
8. 700V ultra-high voltage aluminum electrolytic capacitor as claimed in claim 7, which is characterized in that the main solvent be diethylene glycol (DEG) and
Polyglyceryl ether, the mass ratio of the two are 2:1；The secondary solvent is methoxy poly (ethylene glycol) and ethylene carbonate, the matter of the two
Amount is than being 1:1；The solute is ammonium azelate, 2,7- dibutyl suberic acid and cetyl diacid, wherein ammonium azelate, 2,
The mass ratio of 7- dibutyl suberic acid and cetyl diacid is 1:2:1.
9. 700V ultra-high voltage aluminum electrolytic capacitor as claimed in claim 7, which is characterized in that the flash over voltage elevator is
Boric acid polyester gel, polyoxypropylene polyglyceryl ether and citric acid, wherein boric acid polyester gel, polyoxypropylene polyglyceryl ether and lemon
The mass ratio of lemon acid is 4:1:2.
10. 700V ultra-high voltage aluminum electrolytic capacitor as claimed in claim 7, which is characterized in that other additives are pair
Nitrobenzyl alcohol, polyethylene glycol phosphate and 8-hydroxyquinoline, wherein p nitrobenzyl alcohol, polyethylene glycol phosphate and 8- hydroxyl
The mass ratio of quinoline is 3:1:2.
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