CN110993350A - High-temperature-resistant capacitor and implementation method thereof - Google Patents
High-temperature-resistant capacitor and implementation method thereof Download PDFInfo
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- CN110993350A CN110993350A CN201911373322.XA CN201911373322A CN110993350A CN 110993350 A CN110993350 A CN 110993350A CN 201911373322 A CN201911373322 A CN 201911373322A CN 110993350 A CN110993350 A CN 110993350A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011888 foil Substances 0.000 claims abstract description 95
- 238000004804 winding Methods 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims description 25
- 239000003792 electrolyte Substances 0.000 claims description 14
- 210000001624 hip Anatomy 0.000 claims description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 13
- 239000000654 additive Substances 0.000 claims description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 5
- ARKIFHPFTHVKDT-UHFFFAOYSA-N 1-(3-nitrophenyl)ethanone Chemical compound CC(=O)C1=CC=CC([N+]([O-])=O)=C1 ARKIFHPFTHVKDT-UHFFFAOYSA-N 0.000 claims description 4
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 4
- 229940057847 polyethylene glycol 600 Drugs 0.000 claims description 4
- WDCYWAQPCXBPJA-UHFFFAOYSA-N 1,3-dinitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC([N+]([O-])=O)=C1 WDCYWAQPCXBPJA-UHFFFAOYSA-N 0.000 claims description 3
- SATJMZAWJRWBRX-UHFFFAOYSA-N azane;decanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCC([O-])=O SATJMZAWJRWBRX-UHFFFAOYSA-N 0.000 claims description 3
- 229940067597 azelate Drugs 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 3
- 229940068918 polyethylene glycol 400 Drugs 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- CFBYEGUGFPZCNF-UHFFFAOYSA-N 2-nitroanisole Chemical compound COC1=CC=CC=C1[N+]([O-])=O CFBYEGUGFPZCNF-UHFFFAOYSA-N 0.000 claims description 2
- 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 2
- JKTYGPATCNUWKN-UHFFFAOYSA-N 4-nitrobenzyl alcohol Chemical compound OCC1=CC=C([N+]([O-])=O)C=C1 JKTYGPATCNUWKN-UHFFFAOYSA-N 0.000 claims description 2
- ZBRFXUYITSEQPN-FLGDTWEASA-N C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+] Chemical compound C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].C(CCCCCCC\C=C/CCCCCCCC)(=O)[O-].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+] ZBRFXUYITSEQPN-FLGDTWEASA-N 0.000 claims description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 abstract description 18
- 230000017525 heat dissipation Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- GPEVMRFAFMVKHK-UHFFFAOYSA-N azane;dodecanedioic acid Chemical group [NH4+].[NH4+].[O-]C(=O)CCCCCCCCCCC([O-])=O GPEVMRFAFMVKHK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 125000003827 glycol group Chemical group 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical group [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
-
- 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
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/04—Drying; Impregnating
-
- 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
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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
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
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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
- H01G9/145—Liquid electrolytic capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Electrochemistry (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a high-temperature-resistant capacitor, which comprises a shell, wherein a core wrap is arranged in the shell, the upper end in the shell is connected with a cover plate, the cover plate is respectively connected with a cathode pin and an anode pin, the cathode pin is positioned on one side of the anode pin, the cathode pin and the anode pin are respectively connected with the core wrap, the core wrap is mainly formed by winding first electrolytic paper, anode foil, second electrolytic paper and cathode foil, and the first electrolytic paper, the anode foil, the second electrolytic paper and the cathode foil are sequentially arranged from inside to outside; the invention also discloses a method for realizing the high-temperature-resistant capacitor; the lower edge of the cathode foil is exposed at the lower edge of the second electrolytic paper, the exposed edge is in contact with the bottom of the shell, and the aluminum shell can be used for heat dissipation, so that the heat dissipation effect of the capacitor is better, and the service life of the capacitor is prolonged.
Description
Technical Field
The invention belongs to the technical field of capacitors, and particularly relates to a high-temperature-resistant capacitor and an implementation method thereof.
Background
At present, the environment temperature of the capacitor used in a high-temperature and sealed environment can reach 120-.
For example, chinese patent 201811560789.0 discloses an aluminum electrolytic capacitor and a method for manufacturing the same, wherein the basic structure of the aluminum electrolytic capacitor is a foil type winding structure, which is made by forming an anode foil with an oxide film by etching, forming a cathode foil by etching, separating an electrolytic paper in the middle, winding into a core package, immersing the core package in an electrolyte, riveting a cover plate, and sealing the core package in an aluminum case.
Above-mentioned patent outer lane package electrolytic paper is unfavorable for the inside heat dissipation of core package, and when high temperature leads to aluminium hull bottom swell, the core package can rock to lead to the condenser to leak night the inefficacy.
Disclosure of Invention
The present invention is directed to a high temperature resistant capacitor, which solves the above problems of the prior art. The high-temperature-resistant capacitor provided by the invention has the characteristics of good heat dissipation effect and long service life.
The invention also aims to provide a method for realizing the high-temperature-resistant capacitor.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high temperature resistant capacitor, includes the casing, and the inside of casing is equipped with the core package, and the inside upper end of casing is connected with the apron, is connected with negative pole pin and anode pin on the apron respectively, and the negative pole pin is located one side of anode pin, and negative pole pin and anode pin are connected with the core package respectively, and the core package mainly is formed by first electrolytic paper, positive pole paper tinsel, second electrolytic paper and negative pole tinsel coiling, and first electrolytic paper, positive pole paper tinsel, second electrolytic paper and negative pole tinsel set gradually from built-in outward.
Further, the upper and lower sides of the anode foil are positioned inside the first electrolytic paper and the second electrolytic paper.
Further, the lower edge of the cathode foil is positioned below the lower edge of the second electrolytic paper, and the distance between the lower edge of the cathode foil and the lower edge of the second electrolytic paper is 0.5-1 mm.
In the invention, the anode foil and the cathode foil are both connected with leads, the anode foil is connected with the anode pin through the leads, and the cathode foil is connected with the cathode pin through the leads.
Furthermore, the upper end of the shell is positioned below the cover plate, and the middle of the shell is provided with a plurality of middle girdles.
Further, the method for implementing the high temperature resistant capacitor comprises the following steps:
firstly, cutting foil: cutting the first electrolytic paper, the anode foil, the second electrolytic paper, the cathode foil and the lead into specified sizes for use in the next process;
(II) winding: riveting the leads on the anode foil and the cathode foil respectively, and rolling the first electrolytic paper, the anode foil, the second electrolytic paper and the cathode foil into a core package in sequence from inside to outside;
(III) dipping: after the core bag is dried, the core bag is soaked in electrolyte with corresponding working voltage and is used as a cathode to play a role in repairing an oxide film;
(IV) assembling a seal: and welding the leads on the anode foil and the cathode foil with the anode pin and the cathode pin respectively, putting the anode foil and the cathode foil into the shell, sealing the shell, contacting the exposed edge of the lower edge of the cathode foil with the bottom of the shell, and contacting the cathode foil on the side with a plurality of middle beam waists.
In the third step of the method for realizing the high-temperature-resistant capacitor, the electrolyte is mixed by two or more than two solvents, and the electrolyte comprises the following components in parts by weight: main solvent: 55% -70%, auxiliary solvent: 8.5% -15%, main solute: 20% -35% and additives: 0.5 to 1.5 percent.
In the invention, the main solvent is glycol; the main solute is one or more of ammonium sebacate, ammonium isosebacate, ammonium azelate, ammonium dodecaoleate, PA-16 and HR-01.
In the invention, the auxiliary solvent is one or a mixture of polyethylene glycol 400, polyethylene glycol 600, ethylene glycol monomethyl ether, N-dimethylformamide and N-methylpyrrolidone; the additive is one or more of m-dinitrobenzene, m-nitroacetophenone, p-nitrobenzyl alcohol, p-nitrobenzoic acid, o-nitroanisole, XP-08 and XP-05.
In the method for realizing the high-temperature-resistant capacitor, the upper edge and the lower edge of the anode foil are both positioned in the first electrolytic paper and the second electrolytic paper, the lower edge of the cathode foil is positioned below the lower edge of the second electrolytic paper, the distance between the lower edge of the cathode foil and the lower edge of the second electrolytic paper is 0.5-1mm, the upper end of the shell is positioned below the cover plate, and a plurality of middle girdles are arranged in the middle of the shell.
Compared with the prior art, the invention has the beneficial effects that:
1. the lower edge of the cathode foil is exposed at the lower edge of the second electrolytic paper, the exposed edge is in contact with the bottom of the shell, and the aluminum shell can be used for heat dissipation, so that the heat dissipation effect of the capacitor is better, and the service life of the capacitor is prolonged;
2. the cathode foil is positioned on the outer side of the core bag, the two middle girdles are arranged in the middle of the aluminum shell, the concave part of the middle girdles is directly contacted with the cathode foil, and the bottom of the aluminum shell plays a role in fixing when bulging, so that the failure of the capacitor caused by liquid leakage due to the shaking of the core bag is avoided;
3. according to the invention, the concave part of the middle beam waist is directly contacted with the cathode foil, when the bottom of the aluminum shell is bulged, the bottom of the aluminum shell is separated from the core cladding, and the two added beam waists are still contacted with the cathode foil, so that the heat can be still dissipated through the aluminum shell, the heat dissipation effect of the capacitor is better, and the service life of the capacitor is prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the core package of the present invention;
in the figure: 1. a housing; 2. a cover plate; 3. a cathode pin; 4. an anode pin; 5. the upper end is tied to the waist; 6. a middle corset; 7. a core package; 71. a first electrolytic paper; 72. an anode foil; 73. a second electrolytic paper; 74. a cathode foil; 75. and (7) leading wires.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the present invention provides the following technical solutions: the utility model provides a high temperature resistant capacitor, including casing 1, casing 1's inside is equipped with core package 7, casing 1's inside upper end is connected with apron 2, be connected with negative pole pin 3 and positive pole pin 4 on the apron 2 respectively, negative pole pin 3 is located the one side of positive pole pin 4, and negative pole pin 3 and positive pole pin 4 are connected with core package 7 respectively, core package 7 mainly is formed by coiling first electrolytic paper 71, positive pole foil 72, second electrolytic paper 73 and negative pole foil 74, and first electrolytic paper 71, positive pole foil 72, second electrolytic paper 73 and negative pole foil 74 set gradually from built-in outward, casing 1 is the aluminium system.
Specifically, the upper and lower sides of the anode foil 72 are located inside the first electrolytic paper 71 and the second electrolytic paper 73.
Specifically, the lower edge of the cathode foil 74 is located below the lower edge of the second electrolytic paper 73, and the distance between the lower edge of the cathode foil 74 and the lower edge of the second electrolytic paper 73 is 0.5 mm.
By adopting the above technical scheme, the lower edge of the cathode foil 74 is exposed below the second electrolytic paper 73, and after being wound into the core package 7, when the cathode foil 74 is installed inside the casing 1, the exposed cathode foil 74 can contact the bottom of the casing 1, so that heat is dissipated through the casing 1, and the structure has a good heat dissipation effect.
Specifically, both anode foil 72 and cathode foil 74 are connected to lead 75, anode foil 72 is connected to anode lead 4 via lead 75, and cathode foil 74 is connected to cathode lead 3 via lead 75.
Specifically, the upper end of the shell 1 is located below the cover plate 2, and an upper waist 5 is provided, and two middle waists 6 are provided in the middle of the shell 1.
Specifically, the method for implementing the high-temperature-resistant capacitor comprises the following steps:
firstly, cutting foil: cutting the first electrolytic paper 71, the anode foil 72, the second electrolytic paper 73, the cathode foil 74 and the lead 75 into predetermined sizes for use in the next step;
(II) winding: a lead 75 is respectively riveted on the anode foil 72 and the cathode foil 74, and the first electrolytic paper 71, the anode foil 72, the second electrolytic paper 73 and the cathode foil 74 are rolled into a core package 7 in the order from the inside to the outside;
(III) dipping: after the core package 7 is dried, the core package is soaked in electrolyte with corresponding working voltage and is used as a cathode to play a role in repairing an oxide film;
(IV) assembling a seal: the lead wires 75 on the anode foil 72 and the cathode foil 74 are respectively welded with the anode pin 4 and the cathode pin 3, and are installed in the shell 1, and the shell is sealed, the exposed edge of the lower side of the cathode foil 74 is contacted with the bottom of the shell 1, and the cathode foil 74 on the side is contacted with the two middle beam waists 6.
Specifically, in the third step, the electrolyte adopts two or more than two solvents for mixed use, and the electrolyte comprises the following components in parts by weight: main solvent: 55% and auxiliary solvent: 9.5%, main solute: 35% and additives: 0.5 percent.
Specifically, the main solvent is ethylene glycol; the main solute is a mixture of ammonium sebacate and ammonium isosebacate in a mass ratio of 1: 1.
Specifically, the auxiliary solvent is a mixed solvent of polyethylene glycol 400 and polyethylene glycol 600 according to the volume ratio of 1: 1; the additive is a mixture of m-dinitrobenzene and m-nitroacetophenone according to the mass ratio of 1: 2.
Example 2
The present embodiment is different from embodiment 1 in that: specifically, the lower edge of the cathode foil 74 is located below the lower edge of the second electrolytic paper 73, and the distance between the lower edge of the cathode foil 74 and the lower edge of the second electrolytic paper 73 is 0.8 mm.
Specifically, in the third step, the electrolyte adopts two or more than two solvents for mixed use, and the electrolyte comprises the following components in parts by weight: main solvent: 59% and auxiliary solvent: 15%, main solute: 25% and additives: 1 percent.
Specifically, the main solvent is ethylene glycol; the main solute is ammonium dodecanedioate.
Specifically, the auxiliary solvent is ethylene glycol monomethyl ether; the additive is p-nitrobenzol.
Example 3
The present embodiment is different from embodiment 1 in that: specifically, the lower edge of the cathode foil 74 is located below the lower edge of the second electrolytic paper 73, and the distance between the lower edge of the cathode foil 74 and the lower edge of the second electrolytic paper 73 is 1 mm.
Specifically, in the third step, the electrolyte adopts two or more than two solvents for mixed use, and the electrolyte comprises the following components in parts by weight: main solvent: 70% and auxiliary solvent: 8.5%, main solute: 20% and additives: 1.5 percent.
Specifically, the main solvent is ethylene glycol; the main solute is a mixture of ammonium azelate, PA-16 and HR-01 according to the mass ratio of 1: 2.
Specifically, the auxiliary solvent is a mixed solvent of polyethylene glycol 600, ethylene glycol methyl ether and N, N-dimethylformamide according to the volume ratio of 1: 2: 1; the additive is a mixture of m-nitroacetophenone, XP-08 (a sparking voltage enhancer purchased from Shenzhen New Zeus science and technology Co., Ltd.), and XP-05 (a leakage current reducing additive purchased from Shenzhen New Zeus science and technology Co., Ltd.) in a mass ratio of 1: 2: 3.
In conclusion, the lower edge of the cathode foil is exposed at the lower edge of the second electrolytic paper, and the exposed edge is in contact with the bottom of the shell, so that heat can be dissipated through the aluminum shell, the heat dissipation effect of the capacitor is better, and the service life of the capacitor is prolonged; the cathode foil is positioned on the outer side of the core bag, the two middle girdles are arranged in the middle of the aluminum shell, the concave part of the middle girdles is directly contacted with the cathode foil, and the bottom of the aluminum shell plays a role in fixing when bulging, so that the failure of the capacitor caused by liquid leakage due to the shaking of the core bag is avoided; according to the invention, the concave part of the middle beam waist is directly contacted with the cathode foil, when the bottom of the aluminum shell is bulged, the bottom of the aluminum shell is separated from the core cladding, and the two added beam waists are still contacted with the cathode foil, so that the heat can be still dissipated through the aluminum shell, the heat dissipation effect of the capacitor is better, and the service life of the capacitor is prolonged.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A high temperature resistant capacitor comprising a housing (1), characterized in that: the inside of casing (1) is equipped with core package (7), the inside upper end of casing (1) is connected with apron (2), be connected with negative pole pin (3) and positive pole pin (4) on apron (2) respectively, negative pole pin (3) are located the one side of positive pole pin (4), and negative pole pin (3) and positive pole pin (4) are connected with core package (7) respectively, core package (7) mainly by first electrolytic paper (71), positive pole paper tinsel (72), second electrolytic paper (73) and negative pole paper tinsel (74) are convoluteed and are formed, and first electrolytic paper (71), positive pole paper tinsel (72), second electrolytic paper (73) and negative pole paper tinsel (74) set gradually from built-in outward.
2. A high temperature resistant capacitor according to claim 1, wherein: the upper and lower sides of the anode foil (72) are positioned inside the first electrolytic paper (71) and the second electrolytic paper (73).
3. A high temperature resistant capacitor according to claim 2, wherein: the lower edge of the cathode foil (74) is positioned below the lower edge of the second electrolytic paper (73), and the distance between the lower edge of the cathode foil (74) and the lower edge of the second electrolytic paper (73) is 0.5-1 mm.
4. A high temperature resistant capacitor according to claim 3, wherein: and the anode foil (72) and the cathode foil (74) are both connected with a lead (75), the anode foil (72) is connected with the anode pin (4) through the lead (75), and the cathode foil (74) is connected with the cathode pin (3) through the lead (75).
5. The high temperature resistant capacitor of claim 4, wherein: the upper end of the shell (1) is provided with an upper end beam waist (5) below the cover plate (2), and the middle position of the shell (1) is provided with a plurality of middle beam waists (6).
6. The method for realizing a high-temperature-resistant capacitor according to any one of claims 1-5, comprising the steps of:
firstly, cutting foil: cutting the first electrolytic paper (71), the anode foil (72), the second electrolytic paper (73), the cathode foil (74) and the lead (75) into a predetermined size for the next process;
(II) winding: respectively riveting a lead (75) on the anode foil (72) and the cathode foil (74), and rolling the first electrolytic paper (71), the anode foil (72), the second electrolytic paper (73) and the cathode foil (74) into a core package (7) in sequence from inside to outside;
(III) dipping: after the core cladding (7) is dried, the core cladding is soaked in electrolyte with corresponding working voltage and is used as a cathode to play a role in repairing an oxide film;
(IV) assembling a seal: and welding the leads (75) on the anode foil (72) and the cathode foil (74) with the anode pin (4) and the cathode pin (3) respectively, putting the anode foil and the cathode foil into the shell (1), sealing the shell, contacting the exposed edge of the lower side of the cathode foil (74) with the bottom of the shell (1), and contacting the cathode foil (74) on the side with a plurality of middle beam waists (6).
7. The method of claim 6, wherein the method comprises: in the third step, the electrolyte adopts two or more than two solvents for mixed use, and the electrolyte comprises the following components in parts by weight: main solvent: 55% -70%, auxiliary solvent: 8.5% -15%, main solute: 20% -35% and additives: 0.5 to 1.5 percent.
8. The method of claim 7, wherein the method comprises: the main solvent is ethylene glycol; the main solute is one or more of ammonium sebacate, ammonium isosebacate, ammonium azelate, ammonium dodecaoleate, PA-16 and HR-01.
9. The method of claim 8, wherein the method comprises: the auxiliary solvent is one or more of polyethylene glycol 400, polyethylene glycol 600, ethylene glycol methyl ether, N-dimethylformamide and N-methylpyrrolidone; the additive is one or more of m-dinitrobenzene, m-nitroacetophenone, p-nitrobenzyl alcohol, p-nitrobenzoic acid, o-nitroanisole, XP-08 and XP-05.
10. The method of claim 9, wherein the method further comprises: the upper side and the lower side of the anode foil (72) are both positioned in the first electrolytic paper (71) and the second electrolytic paper (73), the lower side of the cathode foil (74) is positioned below the lower side of the second electrolytic paper (73), the distance between the lower side of the cathode foil (74) and the lower side of the second electrolytic paper (73) is 0.5-1mm, the upper end of the shell (1) is positioned below the cover plate (2), the upper end beam waist (5) is arranged below the upper end of the shell (1), and the middle position of the shell (1) is provided with a plurality of middle beam waists (6).
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