CN107195460B - Novel lightning-proof aluminum electrolytic capacitor and preparation method thereof - Google Patents
Novel lightning-proof aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- 239000003990 capacitor Substances 0.000 title claims abstract description 49
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000011888 foil Substances 0.000 claims abstract description 66
- 239000003792 electrolyte Substances 0.000 claims abstract description 30
- 238000004806 packaging method and process Methods 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 206010042255 Struck by lightning Diseases 0.000 claims abstract description 3
- 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
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 30
- 244000025254 Cannabis sativa Species 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 13
- 239000005060 rubber Substances 0.000 claims description 13
- SATJMZAWJRWBRX-UHFFFAOYSA-N azane;decanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCC([O-])=O SATJMZAWJRWBRX-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 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 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 9
- 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 9
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 claims description 9
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 229920003051 synthetic elastomer Polymers 0.000 claims description 3
- 239000005061 synthetic rubber Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 105
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000306 component Substances 0.000 description 8
- 239000002655 kraft paper Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 3
- 239000007785 strong electrolyte Substances 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 240000000907 Musa textilis Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- QKIUAMUSENSFQQ-UHFFFAOYSA-N dimethylazanide Chemical compound C[N-]C QKIUAMUSENSFQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- 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
- H01G9/08—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/003—Apparatus or processes for encapsulating capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/02—Machines for winding capacitors
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention provides a novel lightning-strike-resistant aluminum electrolytic capacitor and a preparation method thereof, wherein an electrolyte with a sparking voltage of more than 490V is soaked in a core bag, the core bag is formed by overlapping and winding an anode foil, a cathode foil and electrolytic paper, wherein the electrolytic paper used as a substrate is respectively arranged on the same side of the cathode foil and the anode foil, an anode guide pin nailed with the anode foil and a cathode guide pin nailed with the cathode foil are arranged on a penetrating packaging layer, the electrolytic paper comprises inner layer electrolytic paper and outer layer electrolytic paper, the inner layer electrolytic paper is positioned on the inner side of the corresponding cathode foil or anode foil, and the tightness of the inner layer electrolytic paper and the outer layer electrolytic paper is consistent. The invention effectively improves the integral voltage resistance of the product, improves the instantaneous high voltage resistance of the aluminum electrolytic capacitor to 2.2KV, and has the effects of strong impact resistance, high safety performance and service life guarantee.
Description
Technical Field
The invention relates to the technical field of electrolytic capacitors, in particular to a novel lightning-proof aluminum electrolytic capacitor and a preparation method thereof.
Background
The existing aluminum electrolytic capacitor is generally applied to illumination or daily household appliances, when lightning strikes a power transmission line in sudden severe weather, instantaneous high-voltage surge can be generated on the power transmission line for residents, so that the phenomena of breakdown, explosion or bulging bottom and the like of the common electrolytic capacitor of circuits such as illumination appliances or household appliances and the like can be caused due to overvoltage, the performance of the appliances is abnormal, and even the appliances are damaged.
The electrolytic capacitor is one of the components used in a large number in electronic equipment, and is widely applied to the aspects of isolating direct current, coupling, bypassing, filtering, tuning loops, energy conversion, control and the like in a circuit, however, the normal aluminum electrolytic capacitor is usually rated to use a voltage of 500WV, the instantaneous large voltage can not exceed 1000V, and when the instantaneous large voltage exceeds 1000V, the capacitor is damaged and burst.
CN102226978A discloses a lightning-resistant guide pin type safety aluminum electrolytic capacitor, wherein electrolytic paper of the lightning-resistant guide pin type safety aluminum electrolytic capacitor is of a double-layer structure, wherein the inner layer of electrolytic paper is made of a material with low tightness and good liquid absorption, so that electrolyte on the surfaces of a cathode foil and an anode foil is sufficient, the outer layer of electrolytic paper is made of a material with high tightness, the high-voltage impact resistance of the electrolytic paper layer is improved, and the high-voltage impact resistance of the aluminum electrolytic capacitor is further improved. However, the aluminum electrolytic capacitor can only bear the instantaneous high-voltage impact of 1KV, and cannot bear higher instantaneous high-voltage impact. In the electrolytic paper double-layer structure, the inner layer electrolytic paper ensures that the electrolyte on the surfaces of the cathode foil and the anode foil is sufficient but the high-voltage impact resistance is not strong due to the adoption of the material with good low-tightness liquid absorption, and the outer layer electrolytic paper promotes the high-voltage impact resistance of the electrolytic paper layer but the adsorbability to the electrolyte is not enough due to the adoption of the material with high-tightness electrolytic paper, so that the service life of the capacitor is easily premature failure.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the novel lightning-resistant aluminum electrolytic capacitor and the preparation method thereof, which effectively improve the integral voltage-resistant capability of the product, improve the instantaneous high-voltage resistance of the aluminum electrolytic capacitor to 2.2KV, and have the effects of bearing higher instantaneous high voltage and ensuring the service life.
The technical problem to be solved by the invention is realized by the following technical scheme:
the utility model provides a novel anti aluminum electrolytic capacitor who thunderstruck, includes casing, cladding rubber tube and the core package of suit in the casing outside, the opening part that core package top just is located the casing is equipped with the encapsulated layer, the core package soak the electrolyte that flashover voltage is above 490V, the core package is overlapped and is convoluteed by positive pole paper, negative pole paper and electrolytic paper and forms, wherein the homonymy of negative pole paper and positive pole paper is provided with the electrolytic paper as the substrate respectively, runs through the encapsulating layer and is provided with the anodal guide pin that connects with positive pole paper nail and the negative pole guide pin that connects with the negative pole paper nail, electrolytic paper includes inlayer electrolytic paper and outer electrolytic paper, inlayer electrolytic paper is located corresponding negative pole paper or positive pole paper inboard, the tightness of inlayer electrolytic paper and outer electrolytic paper is unanimous.
Further, the tightness of the inner layer electrolytic paper is not less than 0.95g/cm 3 The tightness of the outer layer of electrolytic paper is not less than 0.95g/cm 3 。
Furthermore, the inner layer of electrolytic paper is made of Spanish grass.
Furthermore, the outer layer electrolytic paper is made of Spanish grass.
Further, the thickness of the inner layer electrolytic paper is 50 μm, and the thickness of the outer layer electrolytic paper is 50 μm.
Further, the packaging layer is a sealing rubber plug or synthetic rubber.
Further, the electrolyte comprises the following components in percentage by weight: 30 to 35 percent of hexanediol, 0.7 to 1.2 percent of pure water, 0.7 to 1.5 percent of ammonium sebacate, 1.5 to 2.2 percent of ammonium pentaborate, 5 to 8 percent of ammonium isosebacate, 0.52 to 0.70 percent of p-nitrobenzoic acid, 0.9 to 1.5 percent of hypophosphorous acid, 2 percent of citric acid and 2 percent of diethylene glycol.
The invention also provides a preparation method of the novel lightning-resistant aluminum electrolytic capacitor, which comprises the following steps:
1) Cutting the cathode foil, the anode foil and the electrolytic paper;
2) Nailing and winding, namely nailing and connecting the anode guide pin with the anode foil through the packaging layer, nailing and connecting the cathode guide pin with the cathode foil, laminating the electrolytic paper with the cathode foil and the anode foil, and winding the electrolytic paper, the anode foil and the cathode foil together into a core package; the electrolytic paper comprises inner layer electrolytic paper and outer layer electrolytic paper, the inner layer electrolytic paper is positioned at the inner side of the corresponding cathode foil or anode foil, and the tightness of the inner layer electrolytic paper is consistent with that of the outer layer electrolytic paper;
3) Circularly vacuumizing and pressurizing impregnation: immersing the core bag into electrolyte, and periodically loading negative pressure and positive pressure on the core bag to ensure that the electrolyte is fully immersed on the electrolytic paper;
4) Assembling, namely forming a bare capacitor by the impregnated core package, the shell and the packaging layer;
5) Sleeving a sleeve pipe, namely sleeving a bare capacitor on the rubber pipe;
6) Aging;
7) And (5) testing the characteristics.
Further, the electrolyte comprises the following components in percentage by weight: 30 to 35 percent of hexanediol, 0.7 to 1.2 percent of pure water, 0.7 to 1.5 percent of ammonium sebacate, 1.5 to 2.2 percent of ammonium pentaborate, 5 to 8 percent of ammonium isosebacate, 0.52 to 0.70 percent of p-nitrobenzoic acid, 0.9 to 1.5 percent of hypophosphorous acid, 2 percent of citric acid and 2 percent of diethylene glycol.
The invention has the following beneficial effects:
the electrolytic paper of the aluminum electrolytic capacitor adopts a double-layer structure, wherein the inner layer electrolytic paper and the outer layer electrolytic paper both use electrolytic paper with strong high voltage impact resistance and strong electrolyte adsorption capacity, and the core cladding is soaked with electrolyte with specific composition and proportion, so that the overall voltage resistance of the product is effectively improved through the improvement of process steps and conditions and overall cooperation, the instantaneous high voltage resistance of the aluminum electrolytic capacitor is improved to 2.2KV, and the aluminum electrolytic capacitor has the effects of strong impact resistance, high safety performance and life guarantee.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of a double-layer electrolytic paper structure according to the present invention.
In the figure: 1-rubber tube; 2-a shell; 31-negative pole guide pin; 32-positive electrode guide pin; 4-an encapsulation layer; 5-electrolytic paper; 51-inner layer electrolytic paper; 52-outer layer electrolytic paper; 6-anode foil; 7-cathode foil.
Detailed Description
The electrolyte is used as the core component of the aluminum electrolytic capacitor, the service life, the reliability and the corresponding electrification parameters of the capacitor are closely related to the electrolyte, and the quality of the performance of the capacitor directly influences the quality of the capacitor product. The inventor improves the composition and the proportion of the electrolyte, and through a plurality of times of experimental researches, the inventor unexpectedly discovers that by adopting the specific electrolyte, the same sides of the cathode foil and the anode foil are respectively provided with the electrolytic paper used as the substrate, the electrolytic paper comprises inner layer electrolytic paper and outer layer electrolytic paper, the inner layer electrolytic paper is positioned at the inner side of the corresponding cathode foil or anode foil, the inner layer electrolytic paper and the outer layer electrolytic paper both use the electrolytic paper with strong high voltage impact resistance and strong electrolyte adsorption capacity, the tightness of the inner layer electrolytic paper and the outer layer electrolytic paper is consistent, the instant high voltage resistance of the aluminum electrolytic capacitor can be improved to 2.2KV by adopting the scheme, and the aluminum electrolytic capacitor has the effects of strong impact resistance, high safety performance and life guarantee.
The present invention will be described in detail below with reference to the drawings and examples.
Example 1
A preparation method of a novel lightning-proof aluminum electrolytic capacitor comprises the following steps:
1) Cutting, namely cutting cathode foil, anode foil and electrolytic paper, wherein the electrolytic paper comprises inner layer electrolytic paper and outer layer electrolytic paper, the inner layer electrolytic paper is positioned at the inner side of the corresponding cathode foil or anode foil, and the tightness of the inner layer electrolytic paper is consistent with that of the outer layer electrolytic paper;
2) Winding by nailing, namely respectively nailing and connecting the anode guide pin and the cathode guide pin with the anode foil and the cathode foil through the packaging layer, stacking the electrolytic paper, the cathode foil and the anode foil into a laminated structure of the electrolytic paper, the cathode foil, the electrolytic paper and the anode foil, and winding the laminated structure into a core package, wherein the electrolytic paper comprises inner-layer electrolytic paper and outer-layer electrolytic paper, and the inner-layer electrolytic paper is positioned on one side of the corresponding cathode foil or anode foil; the tightness of the inner layer electrolytic paper is not less than 0.95g/cm 3 The inner layer of electrolytic paper is made of Spanish grass; the tightness of the outer layer of electrolytic paper is not less than 0.95g/cm 3， The outer layer of electrolytic paper is made of Spanish grass; the thickness of the inner layer of electrolytic paper is 50 μm, and the thickness of the outer layer of electrolytic paper is 50 μm;
3) Circularly vacuumizing and pressurizing impregnation: immersing the core bag into the electrolyte after being cooked, and periodically loading negative pressure and positive pressure on the core bag to ensure that the electrolyte is fully immersed on the electrolytic paper;
the electrolyte comprises the following components in percentage by weight: 32% of hexanediol, 1% of pure water, 1% of ammonium sebacate, 1.8% of ammonium pentaborate, 6% of ammonium isosebacate, 0.6% of p-nitrobenzoic acid, 1.2% of hypophosphorous acid, 2% of citric acid and 2% of diethylene glycol;
the electrolyte boiling method comprises the following steps: 1) Firstly, heating hexanediol and pure water to 70-90 ℃; 2) Adding ammonium sebacate, ammonium pentaborate and ammonium isosebacate into the solvent; 3) Continuing to heat the solution to 136-145 ℃; 4) Adding p-nitrobenzoic acid, hypophosphorous acid, citric acid and diethylene glycol and completely dissolving; 5) Naturally cooling;
4) Assembling, namely forming a bare capacitor by the impregnated core package, the shell and the packaging layer;
5) Sleeving a bare capacitor on a rubber tube;
6) Aging;
7) And (5) testing the characteristics.
Example 2
This embodiment is basically the same as embodiment 1, except that in this embodiment, the electrolyte comprises the following components: 30 percent of hexanediol, 0.7 percent of pure water, 0.7 percent of ammonium sebacate, 1.5 percent of ammonium pentaborate, 5 percent of ammonium isosebacate, 0.52 percent of p-nitrobenzoic acid, 0.9 percent of hypophosphorous acid, 2 percent of citric acid and 2 percent of diethylene glycol.
Example 3
This embodiment is basically the same as embodiment 1, except that in this embodiment, the components of the electrolyte include: 35% of hexanediol, 1.2% of pure water, 1.5% of ammonium sebacate, 2.2% of ammonium pentaborate, 8% of ammonium isosebacate, 0.70% of p-nitrobenzoic acid, 1.5% of hypophosphorous acid, 2% of citric acid and 2% of diethylene glycol.
Comparative example 1
Basically the same as example 1, except that in this comparative example, the inner layer electrolytic paper was composed of a paper having a thickness of 40 μm and a tightness of 0.3 g/cm 3 The manila hemp is prepared; the outer layer of the electrolytic paper is 60 mu m thick and 0.6 g/cm tightness 3 The kraft paper of (1).
Comparative example 2
Basically the same as example 1, except that in this comparative example, both the inner layer electrolytic paper and the outer layer electrolytic paper were low-tension electrolytic paper having a tension as low as 0.7 g/cm 3 。
Comparative example 3
Essentially the same as example 1, except that in this comparative example, the electrolyte comprises the following components: 65% -78% of N, N-dimethyl amide, 1-1.5% of pure water, 0.8-2.3% of ammonium sebacate, 2.0-4.5% of ethanolamine, 2.3-2.7% of ammonium dihydrogen phosphate, 1.2-2.5% of hypophosphorous acid, 2% of citric acid and 2% of diethylene glycol.
Test examples
20 aluminum electrolytic capacitors of examples 1 to 3 and comparative examples 1 to 3 were manufactured, and subjected to transient high voltage resistance and service life detection, and the detection results show that the transient high voltage resistance of the aluminum electrolytic capacitors of examples 1 to 3 are 2200V, 2100V and 2150V, respectively, and the transient high voltage resistance of the aluminum electrolytic capacitors of comparative examples 1 to 3 are 950V, 900V and 820V, respectively; after the life test (105 ℃, 400V load, 5000 hours), the aluminum electrolytic capacitors in examples 1 to 3 had smaller fluctuation of the capacity, ESR, leakage current, and other test indexes than the initial test indexes, while the aluminum electrolytic capacitors in comparative examples 1 to 3 had larger fluctuation of each test index.
Example 4
Referring to fig. 1-2, a novel lightning-strike-resistant aluminum electrolytic capacitor comprises a shell 2, a rubber tube 1 coated outside the shell, and a core package sleeved in the shell, wherein a packaging layer 4 is arranged above the core package and at an opening of the shell 2, the core package is formed by overlapping and winding an anode foil 6, a cathode foil 7 and electrolytic paper 5, the electrolytic paper 5 serving as a substrate is respectively arranged on the same side of the cathode foil 7 and the anode foil 6, and a positive guide pin 32 nailed with the anode foil 6 and a negative guide pin 31 nailed with the cathode foil 7 penetrate through the packaging layer 4.
The electrolytic paper 5 comprises an inner layer electrolytic paper 51 and an outer layer electrolytic paper 52, the inner layer electrolytic paper 51 is positioned at the inner side of the corresponding cathode foil 7 or anode foil 6, and the tightness of the inner layer electrolytic paper 51 and the outer layer electrolytic paper 52The degrees are consistent. Preferably, the tightness of the inner layer electrolytic paper 51 is not less than 0.95g/cm 3 The tightness of the outer layer of the electrolytic paper 52 is not less than 0.95g/cm 3 . More preferably, the inner layer electrolytic paper 51 is made of spanish grass, and the outer layer electrolytic paper 52 is made of spanish grass. The invention creatively selects Spanish grass as the material of the electrolytic paper 5, and the Spanish grass has strong high voltage impact resistance and better electrolyte adsorption capacity than kraft paper under the same thickness of the electrolytic paper due to the difference of the fiber structure and the papermaking process compared with the kraft paper. Specifically, for pressure resistance, spanish grass is 250V/μm, kraft paper is 150V/μm; as for the electrolyte adsorption capacity (vertical imbibition height), spanish grass is 10mm/10min, and kraft paper is 7mm/10min. The inner layer electrolytic paper 51 and the outer layer electrolytic paper 52 are both made of Spanish grass, and the electrolytic paper has strong high voltage impact resistance and strong electrolyte adsorption capacity, so that the capacitor can bear higher instantaneous high voltage and can ensure the service life. In specific implementation, the thickness of the inner layer electrolytic paper 51 is 50 μm, and the thickness of the outer layer electrolytic paper 52 is 50 μm.
The core bag is soaked with electrolyte with the sparking voltage of more than 490V. Specifically, the electrolyte comprises the following components in percentage by weight: 1) Solvent: comprises main solvent, 30-35% of hexanediol and 0.7-1.2% of pure water; 2) Solute: comprises 0.7-1.5% ammonium sebacate, 1.5-2.2% ammonium pentaborate, and 5-8% ammonium isosebacate; 3) Additive: comprises 0.52-0.70% of p-nitrobenzoic acid and 0.9-1.5% of hypophosphorous acid; 4) Sparking voltage booster: including 2% citric acid and 2% diethylene glycol.
In a specific implementation, the encapsulation layer 4 is a sealing rubber plug or synthetic rubber. Preferably, the sealing rubber plug is butyl rubber with the insulation voltage of more than 500V, and the shell is arranged in the rubber tube 1 with the dielectric strength of more than 10 KV/mm.
The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.
Claims (6)
1. A novel lightning-strike-resistant aluminum electrolytic capacitor comprises a shell, a rubber tube and a core package, wherein the rubber tube is coated on the outer side of the shell, the core package is sleeved in the shell, a packaging layer is arranged above the core package and positioned at an opening of the shell, and the core package is soaked with electrolyte with a sparking voltage of over 490V, the core package is formed by overlapping and winding anode foil, cathode foil and electrolytic paper, electrolytic paper serving as a substrate is respectively arranged on the same side of the cathode foil and the anode foil, an anode guide pin in nail joint with the anode foil and a cathode guide pin in nail joint with the cathode foil are arranged through the packaging layer, the electrolytic paper comprises inner layer electrolytic paper and outer layer electrolytic paper, the inner layer electrolytic paper is positioned on the inner side of the corresponding cathode foil or anode foil, and the tightness of the inner layer electrolytic paper is consistent with that of the outer layer electrolytic paper; the tightness of the inner layer electrolytic paper is not less than 0.95g/cm 3 The tightness of the outer layer of electrolytic paper is not less than 0.95g/cm 3 (ii) a The inner layer of electrolytic paper is made of Spanish grass; the outer layer of electrolytic paper is made of Spanish grass.
2. The novel lightning strike resistant aluminum electrolytic capacitor of claim 1 wherein the thickness of the inner layer of electrolytic paper is 50 μm and the thickness of the outer layer of electrolytic paper is 50 μm.
3. The new lightning strike resistant aluminum electrolytic capacitor of claim 1 wherein the encapsulation layer is a sealing rubber plug or synthetic rubber.
4. The novel lightning strike resistant aluminum electrolytic capacitor of claim 1 wherein the electrolyte comprises the following components in weight percent: 30 to 35 percent of hexanediol, 0.7 to 1.2 percent of pure water, 0.7 to 1.5 percent of ammonium sebacate, 1.5 to 2.2 percent of ammonium pentaborate, 5 to 8 percent of ammonium isosebacate, 0.52 to 0.70 percent of p-nitrobenzoic acid, 0.9 to 1.5 percent of hypophosphorous acid, 2 percent of citric acid and 2 percent of diethylene glycol.
5. The method for preparing a novel lightning strike resistant aluminum electrolytic capacitor as claimed in any one of claims 1 to 4, characterized in that it comprises the following steps:
1) Cutting the cathode foil, the anode foil and the electrolytic paper;
2) Nailing and winding, namely nailing and connecting the anode guide pin with the anode foil through the packaging layer, nailing and connecting the cathode guide pin with the cathode foil, laminating the electrolytic paper with the cathode foil and the anode foil, and winding the electrolytic paper, the anode foil and the cathode foil together into a core package; the electrolytic paper comprises inner layer electrolytic paper and outer layer electrolytic paper, the inner layer electrolytic paper is positioned at the inner side of the corresponding cathode foil or anode foil, and the tightness of the inner layer electrolytic paper is consistent with that of the outer layer electrolytic paper;
3) Circularly vacuumizing and pressurizing impregnation: immersing the core bag into electrolyte, and periodically loading negative pressure and positive pressure on the core bag to ensure that the electrolyte is fully immersed on the electrolytic paper;
4) Assembling, namely forming a bare capacitor by the impregnated core package, the shell and the packaging layer;
5) Sleeving a sleeve pipe, namely sleeving a bare capacitor on the rubber pipe;
6) Aging;
7) And (5) testing the characteristics.
6. The method for preparing the novel lightning-resistant aluminum electrolytic capacitor as claimed in claim 5, wherein the electrolyte comprises the following components in percentage by weight: 30 to 35 percent of hexanediol, 0.7 to 1.2 percent of pure water, 0.7 to 1.5 percent of ammonium sebacate, 1.5 to 2.2 percent of ammonium pentaborate, 5 to 8 percent of ammonium isosebacate, 0.52 to 0.70 percent of p-nitrobenzoic acid, 0.9 to 1.5 percent of phosphorous acid, 2 percent of citric acid and 2 percent of diethylene glycol.
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| CN107910183B (en) * | 2017-12-15 | 2019-09-20 | 肇庆绿宝石电子科技股份有限公司 | A kind of high-pressure aluminum electrolytic capacitor and its manufacturing method of resistance to -40 DEG C of low temperature |
| CN108063052B (en) * | 2017-12-15 | 2020-05-15 | 肇庆绿宝石电子科技股份有限公司 | High-voltage high-temperature-resistant long-life aluminum electrolytic capacitor and manufacturing method thereof |
| CN108565120B (en) * | 2018-03-01 | 2020-01-10 | 湖南艾华集团股份有限公司 | Overvoltage protection capacitor and preparation method thereof |
| CN109103021B (en) * | 2018-07-10 | 2021-02-02 | 肇庆绿宝石电子科技股份有限公司 | Safety aluminum electrolytic capacitor capable of resisting 4KV lightning stroke |
| CN109192509B (en) * | 2018-07-10 | 2020-02-28 | 肇庆绿宝石电子科技股份有限公司 | 600V high-voltage high-temperature-resistant long-life aluminum electrolytic capacitor and manufacturing method thereof |
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| CN112735851B (en) * | 2020-12-18 | 2022-07-05 | 肇庆市华胜电子有限公司 | Production method and structure of-55 ℃ ultralow temperature guide pin type safety aluminum electrolytic capacitor |
| CN112700966A (en) * | 2020-12-18 | 2021-04-23 | 肇庆市华胜电子有限公司 | 130 ℃ high-temperature ox horn type safety aluminum electrolytic capacitor and preparation method thereof |
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| CN100552840C (en) * | 2005-08-23 | 2009-10-21 | 浙江凯恩特种材料股份有限公司 | A kind of electrolytic capacitor paper |
| CN106169373A (en) * | 2016-08-24 | 2016-11-30 | 湖南艾华集团股份有限公司 | A kind of aluminium electrolutic capacitor of resistance to the vibration shape |
| CN106449115A (en) * | 2016-10-31 | 2017-02-22 | 丰宾电子（深圳）有限公司 | Charging-and-discharging-resistant aluminum electrolytic capacitor used for charging pile and application thereof |
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