CN112951601A - Low-temperature-resistant capacitor and manufacturing method thereof - Google Patents
Low-temperature-resistant capacitor and manufacturing method thereof Download PDFInfo
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- CN112951601A CN112951601A CN202110121590.3A CN202110121590A CN112951601A CN 112951601 A CN112951601 A CN 112951601A CN 202110121590 A CN202110121590 A CN 202110121590A CN 112951601 A CN112951601 A CN 112951601A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 94
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 60
- 238000009413 insulation Methods 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000010030 laminating Methods 0.000 claims abstract description 9
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 239000011888 foil Substances 0.000 claims description 68
- 239000003792 electrolyte Substances 0.000 claims description 28
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
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- 239000002904 solvent Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- -1 phosphate ester Chemical class 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
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- 238000010438 heat treatment Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
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- 238000005260 corrosion Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 2
- 239000005695 Ammonium acetate Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ATHHXGZTWNVVOU-UHFFFAOYSA-N N-methylformamide Chemical compound CNC=O ATHHXGZTWNVVOU-UHFFFAOYSA-N 0.000 description 2
- 229940043376 ammonium acetate Drugs 0.000 description 2
- 235000019257 ammonium acetate Nutrition 0.000 description 2
- VZTDIZULWFCMLS-UHFFFAOYSA-N ammonium formate Chemical compound [NH4+].[O-]C=O VZTDIZULWFCMLS-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229930188620 butyrolactone Natural products 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000010294 electrolyte impregnation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/10—Housing; Encapsulation
- H01G2/103—Sealings, e.g. for lead-in wires; Covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/10—Housing; Encapsulation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The design of the application relates to the technical field of capacitors, in particular to a low-temperature-resistant capacitor and a manufacturing method thereof, wherein the low-temperature-resistant capacitor comprises a heat insulation sleeve, an aluminum shell arranged in the heat insulation sleeve, a capacitor element arranged in the aluminum shell and a sealing element which is arranged in the aluminum shell and is abutted to the capacitor element; the electric capacity prime cell includes the negative pole paper tinsel with the laminating of aluminium casing medial surface, the low temperature resistant electrolytic paper with the laminating of negative pole paper tinsel medial surface and the positive pole paper tinsel with the laminating of low temperature resistant electrolytic paper medial surface, be equipped with low temperature resistant electrolytic paper on the lateral surface of negative pole paper tinsel, be equipped with low temperature resistant electrolytic paper on the medial surface of positive pole paper tinsel, equal rigid coupling has the lead wire on negative pole paper tinsel and the positive pole paper tinsel, the one end of lead wire is worn out from sealing member, aluminium casing and thermal-insulated sleeve. The capacitor solves the problem of poor low-temperature resistance of the capacitor in the related art, and has the advantage of improving the low-temperature resistance of the capacitor.
Description
Technical Field
The application relates to the technical field of capacitors, in particular to a low-temperature-resistant capacitor and a manufacturing method thereof.
Background
At present, under the use conditions of some extremely low temperatures such as south Pole scientific research, and in some northeast areas with the temperature of minus 43 ℃, electric products often appear under the low temperature conditions, and the electric products can not be normally used often because electronic components such as capacitors fail or are damaged. In the related art, the conventional temperature resistance of the capacitor is minus 40 ℃ to 85 ℃.
With respect to the related art among the above, the inventors consider that there is a defect that the low temperature resistance of the capacitor is poor.
Disclosure of Invention
In order to improve the low temperature resistance of a capacitor, the application provides a low temperature resistant capacitor and a manufacturing method thereof.
In a first aspect, the application provides a low temperature resistant capacitor, which adopts the following technical scheme:
a low-temperature-resistant capacitor comprises a heat insulation sleeve, an aluminum shell arranged in the heat insulation sleeve, a capacitor element arranged in the aluminum shell and a sealing element arranged in the aluminum shell and abutted against the capacitor element;
the electric capacity prime cell includes the negative pole paper tinsel with the laminating of aluminium casing medial surface, the low temperature resistant electrolytic paper with the laminating of negative pole paper tinsel medial surface and the positive pole paper tinsel with the laminating of low temperature resistant electrolytic paper medial surface, be equipped with low temperature resistant electrolytic paper on the lateral surface of negative pole paper tinsel, be equipped with low temperature resistant electrolytic paper on the medial surface of positive pole paper tinsel, equal rigid coupling has the lead wire on negative pole paper tinsel and the positive pole paper tinsel, the one end of lead wire is worn out from sealing member, aluminium casing and thermal-insulated sleeve.
Through adopting above-mentioned technical scheme, thermal-insulated heat preservation's effect can be played to the thermal-insulated sleeve, avoids the condenser service environment to cross excessively to take place to damage, and the low temperature resistant performance of low temperature resistant electrolytic paper in this application is better, makes the difficult too big change that takes place of the conductivity of the electrolyte composition of flooding in the electrolytic paper, influences the performance and the life of condenser, has improved the low temperature resistant performance of condenser.
Optionally, an electric heating wire is arranged in the heat insulation sleeve along the axial direction.
Through adopting above-mentioned technical scheme, the heating wire in the thermal-insulated sleeve can generate heat under the circumstances of external circuit circular telegram, avoids the condenser to be in the condition that takes place the condenser not durable even damage in the service environment that is less than forty degrees centigrade below zero, like in the arctic, south Pole scientific investigation that kind of extremely cold weather environment.
Optionally, the outer side surface of the heat insulation sleeve is coated with a protective layer.
Through adopting above-mentioned technical scheme, the inoxidizing coating can play the effect of protection thermal-insulated sleeve, avoids leading to the fact the damage because of thermal-insulated telescopic most exposes outside, can also reduce the heat and scatter and disappear, makes the low temperature resistant performance of this application better.
Optionally, a heat insulation coating is arranged on the outer surface of the aluminum shell.
Through adopting above-mentioned technical scheme, the heat that thermal-insulated heat preservation coating avoided the aluminum hull surface scatters and disappears in microthermal service environment fast, further improves the low temperature resistant performance of this application.
Optionally, the aluminum shell includes a cylinder with an opening at an upper end and a cover body fixedly connected with the opening end of the cylinder.
Through adopting above-mentioned technical scheme, the aluminium casing comprises barrel and lid, and the two forms an inner space, and the installation and the sealing process of the plain son of the electric capacity and the sealed piece of the later stage of being convenient for.
Optionally, an explosion-proof groove is formed in the outer surface, far away from the opening end, of the barrel body.
Through adopting above-mentioned technical scheme, when the withstand voltage value that capacitor voltage was too high to lead to puncturing or when the installation polarity connect the mistake, the condenser explodes very easily and arouses danger, and consequently when the setting up of explosion-proof groove made the pressure increase in the condenser, one side release pressure of keeping away from the open end on the aluminium casing avoided the condenser to explode along circumference.
Optionally, the diameter and length ratio of the rolled cylinder of the cathode foil, the low temperature resistant electrolytic paper and the anode foil is 1: 2 to 1: 4.
By adopting the technical scheme, the widths of the cathode foil and the anode foil in the capacitor are increased, the capacitor element is slender, the inductance of the capacitor under high frequency is reduced, and the impedance of the capacitor is reduced.
Optionally, the density of the low temperature resistant electrolytic paper is 0.75 g/cc to 0.85 g/cc.
By adopting the technical scheme, the electrolytic paper with lower density is adopted, so that the impedance of the capacitor is favorably reduced, and the performance of the capacitor is further optimized.
In a second aspect, the application also discloses an installation method of the transformer substation distribution room switch cabinet, and the installation device of the transformer substation distribution room switch cabinet comprises the following steps:
etching the aluminum foil to enlarge the surface area of the aluminum;
forming a dielectric layer on a surface of the anode foil;
cutting, namely cutting the cathode foil, the electrolytic paper and the anode foil according to the product requirements;
winding to manufacture a capacitor element, inserting electrolytic paper between the cathode foil and the anode foil, winding into a cylindrical shape, and connecting leads on the cathode foil and the anode foil;
impregnating the capacitor element with electrolyte, so that the electrolyte is impregnated on the electrolytic paper to make the electrolytic paper become low-temperature-resistant electrolytic paper;
and sealing, namely, the capacitor element is arranged in an aluminum shell, sealing is carried out by using a sealing piece, and then the outer side surface of the aluminum shell is coated with a heat insulation sleeve and then the heat insulation sleeve can be sent to a subsequent detection procedure so as to finish the manufacturing work of the rest capacitor.
By adopting the technical scheme, the low-temperature-resistant capacitor manufactured by the manufacturing method provided by the application has better low-temperature resistance, and the capacitor has longer service life in a low-temperature environment and is not easy to damage.
Optionally, the electrolyte used in the electrolyte impregnation step consists of 70 percent of mixed electrolyte solvent, 27 percent of solute, 1 percent of phosphate ester and 2 percent of oxygen getter.
By adopting the technical scheme, the prepared electrolyte has high conductivity, the capacitor element can meet the requirement of high-frequency low-impedance products on the high conductivity of the low-temperature-resistant electrolytic paper after being soaked by the electrolyte, and the low-temperature resistance of the capacitor is better.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the heat insulation sleeve can play a role in heat insulation and preservation, the damage of the capacitor caused by too low use environment is avoided, and the low temperature resistance of the low temperature resistant electrolytic paper is better, so that the conductivity of electrolyte components soaked in the electrolytic paper is not easy to change too much, the performance and the service life of the capacitor are influenced, and the low temperature resistance of the capacitor is improved;
2. the heating wire in the heat insulation sleeve can generate heat under the condition that an external circuit is electrified, so that the condition that the capacitor is not durable or even damaged in a use environment with the temperature lower than forty ℃ below zero is avoided, such as an extremely cold weather environment like north pole and south pole scientific investigation;
3. the heat insulating coating in this application can reduce the heat loss of aluminium casing surface, further improves the low temperature resistant performance of this application.
Drawings
Fig. 1 is a schematic view of an overall structure of a low temperature resistant capacitor disclosed in an embodiment of the present application.
Fig. 2 is a schematic structural view of a low temperature resistant capacitor disclosed in an embodiment of the present application after being half-cut in an axial direction.
FIG. 3 is a schematic sectional view showing a thermal insulating coating on the outer side of an aluminum case.
Fig. 4 is a partially enlarged view of a portion a in fig. 2.
Fig. 5 is a block diagram of the steps of a method of manufacturing a low temperature resistant capacitor as disclosed in the examples of the present application.
Description of reference numerals: 11. a heat insulating sleeve; 111. an electric heating wire; 112. a protective layer; 21. an aluminum housing; (ii) a 211. A heat insulating coating; 212. a barrel; 2121. an explosion-proof groove; 213. a cover body; 31. a capacitor element; 311. a cathode foil; 312. low temperature resistant electrolytic paper; 313. an anode foil; 314. a lead wire; 41. and a seal.
Detailed Description
The present application is described in further detail below with reference to figures 1-5. It can be understood that, with the improvement of the quality requirements of the communication industry, the automotive electronics and the military supplies, a stricter requirement is provided for the lower limit of the working temperature of the capacitor, when the temperature is lower than minus 40 ℃, the conductivity of the electrolyte paper in the capacitor can be obviously reduced, if the lower limit of the working temperature reaches minus 55 ℃, the conductivity can only reach 15mS/cm, and the conductivity for the high-frequency low-impedance electrolyte should at least reach 30mS/cm, so the service life of the capacitor under the low-temperature environment can be shortened, and even the service life of the electronic product is affected, and therefore, the above problems need to be improved urgently.
The embodiment of the application discloses a low-temperature-resistant capacitor, and referring to fig. 1 and 2, the low-temperature-resistant capacitor comprises a heat insulation sleeve 11, an aluminum shell 21, a capacitor element 31 and a sealing element 41. The aluminum case 21 is disposed in the heat insulating sleeve 11, the capacitor element 31 is disposed in the aluminum case 21, and the sealing member 41 is disposed in the aluminum case 21 and abuts against the upper end surface of the capacitor element 31.
Referring to fig. 1 and 2, the heat insulating sleeve 11 plays a role of thermal insulation, the heat insulating sleeve 11 can be made of waterproof thermal sponge, and the inner side surface of the heat insulating sleeve 11 is attached to the outer side surface of the aluminum shell 21. In some possible embodiments of the present application, the heating wire 111 is disposed inside the heat insulation sleeve 11 along the circumferential direction, the heating wire 111 is disposed inside the heat insulation sleeve 11, and in order to increase the heating area of the aluminum casing 21, the heating wire 111 is disposed inside the heat insulation sleeve 11 in a spiral shape, and a pin is left at the upper end of the heat insulation sleeve 11.
Further, in order to protect the heat insulation sleeve 11, reduce damage to the heat insulation sleeve 11 and mark the whole capacitor, a protective layer 112 is further arranged on the outer side surface of the heat insulation sleeve 11, the protective layer 112 can be made of a heat-shrinkable rubber tube through bonding, and the protective layer 112 and the heat insulation sleeve 11 can be bonded in a connection relationship.
Referring to fig. 1 and 3, a layer of dense alumina is formed on the surface of the aluminum shell 21, and compared with an iron shell, the aluminum shell 21 has better ductility, is not easy to rust and damage, and has higher structural strength. The outer surface of the aluminum shell 21 is further provided with a heat insulation coating 211, the heat insulation coating 211 can be formed by coating a heat insulation coating on the outer surface of the aluminum shell 21, and in a possible embodiment of the application, the heat insulation coating can be a heat insulation coating with a model number of DT 22.
Referring to fig. 2, the aluminum case 21 includes a cylinder 212 having an upper end opened and a cover 213 fixedly coupled to an open end of the cylinder 212. The cylinder 212 may be formed by stamping an aluminum plate, the upper end of the cylinder 212 is open, and the cylinder 212 is used for placing the capacitor element 31. The lower end of the cover 213 is open and welded to the barrel 212, and the upper surface of the cover 213 is provided with two through holes for electrically connecting the capacitor 31 to an external circuit.
Referring to fig. 1, in order to prevent the capacitor from bursting due to the expansion of the internal volume of the cylinder 212, referring to fig. 1, an explosion-proof groove 2121 is further formed on the outer surface of the cylinder 212 away from the open end, and the explosion-proof groove 2121 may be cross-shaped.
Referring to fig. 1 and 4, a capacitor element 31 is placed inside the aluminum case 21 as a core portion of the inside of the capacitor, and the capacitor element 31 includes a cathode foil 311, a low temperature resistant electrolytic paper 312, an anode foil 313, and a lead 314.
The cathode foil 311 can be made of an aluminum foil strip, the inner side and the outer side of the cathode foil 311 are both provided with low temperature resistant electrolytic paper 312, the low temperature resistant electrolytic paper 312 is formed by dipping low temperature resistant electrolyte, and the surface of the low temperature resistant electrolytic paper 312 is attached to the surface of the cathode foil 311. The anode foil 313 is also made of an aluminum foil strip, the outer side surface of the anode foil 313 is attached to the inner side surface of the low temperature resistant electrolytic paper 312, and the inner side surface of the anode foil 313 is further provided with a layer of low temperature resistant electrolytic paper 312, so that the low temperature resistant electrolytic paper 312, the cathode foil 311, the low temperature resistant electrolytic paper 312, the anode foil 313 and the low temperature resistant electrolytic paper 312 are sequentially attached from outside to inside to form a rectangular strip, and are finally wound into a cylinder to be placed in the aluminum shell 21. The number of the lead wires 314 is two, the two lead wires 314 are respectively fixedly connected with the cathode foil 311 and the anode foil 313, the connection mode can be welding, and one ends of the lead wires 314 sequentially penetrate out of the sealing element 41, the aluminum shell 21 and the heat insulation sleeve 11 and are used for being connected with pins on an external circuit such as a PCB.
Further, in order to improve the impedance of the capacitor, the diameter and length ratio of the cylinder in which cathode foil 311, low temperature resistant electrolytic paper 312, and anode foil 313 are rolled is 1: 2 to 1: 4, that is, the cylinder is formed in a slim shape, the relative width of cathode foil 311 and anode foil 313 is increased, and the impedance of the capacitor is improved. In addition, in order to improve the impregnation effect of the low temperature resistant electrolytic paper 312, the density of the low temperature resistant electrolytic paper 312 is 0.75 g/cc to 0.85 g/cc.
Referring to fig. 2, the sealing member 41 is an important sealing structure of the capacitor, the sealing member 41 may be a cylindrical block made of butyl rubber, the sealing member 41 is located at a top position in the aluminum case 21, and a lower end surface of the sealing member 41 abuts against an upper end surface of the capacitor element 31.
The embodiment of the application also discloses a manufacturing method of the low-temperature-resistant capacitor, which is used for manufacturing the low-temperature-resistant capacitor disclosed in the embodiment, and referring to fig. 5, the manufacturing method of the low-temperature-resistant capacitor comprises the following steps:
s101, the aluminum foil is etched in a corrosion mode.
The aluminum foil after chemical etching can be directly used as the material for manufacturing the cathode foil 311, the purpose of the corrosion etching treatment is to increase the surface area of the aluminum foil, and because the capacitance of the capacitor is in direct proportion to the surface area of the aluminum foil, the surface of the aluminum foil after corrosion etching of the aluminum foil with the same size becomes an uneven surface so as to increase the surface area.
In step S102, a dielectric layer is formed on the surface of anode foil 313.
The aluminum foil after the etching and the corrosion is electrolyzed by chemicals and a direct current power supply to form a layer of oxide film, and the oxide film is used as a raw material of the anode foil 313 to prepare the anode foil 313.
And S103, slitting.
The cathode foil 311, the electrolytic paper and the anode foil 313 are cut according to the product requirements to be used as raw materials for manufacturing the capacitor element 31, and IPQC (in-process quality control) is required after cutting is finished, so that batch unqualified products are prevented from occurring, and the unqualified products are prevented from flowing into the next procedure to be processed continuously.
S104, the capacitor element 31 is wound.
Firstly, electrolytic paper is inserted between the cathode foil 311 and the anode foil 313, the cathode foil 311 and the anode foil 313 are wound into a cylindrical shape, and the two lead wires 314 are connected to the cathode foil 311 and the anode foil 313 respectively and fixedly by using a caulking manner. Similarly, after the capacitor element 31 is manufactured, a process quality control procedure is required to prevent unqualified products from flowing into the next procedure to continue processing.
And S105, immersing the electrolyte.
The capacitor element 31 is soaked in the electrolyte, so that the electrolyte is soaked on the electrolytic paper to enable the electrolytic paper to become the low temperature resistant electrolytic paper 312, and after the soaking is finished, a process quality control procedure is required to avoid unqualified products from flowing into the next procedure to continue processing.
And S106, sealing.
The capacitor element 31 is put into the aluminum case 21 and sealed by the sealing member 41, and then the outer side surface of the aluminum case 21 is covered with the heat insulating sleeve 11, and the capacitor element can be sent to the subsequent testing process to complete the remaining capacitor manufacturing work.
In step S105, in order to improve the low temperature resistance of the impregnated capacitor element 31, the electrolyte used for impregnating the electrolyte is formed by mixing 70 percent of mixed electrolyte solvent, 27 percent of solute, 1 percent of phosphate and 2 percent of oxygen absorbent.
The mixed electrolyte solvent can adopt one or a mixed solvent of butyrolactone, methyl formamide and methyl pyrrolidone, and the prepared capacitor has a lower working temperature limit of 55 ℃ below zero due to the small viscosity and the excellent high-low temperature special effect compared with ethylene glycol. The electrolyte solute can adopt ammonium formate or ammonium acetate which is organic ammonium carboxylate with micromolecules easy to ionize as the solute, because the ionic radius of formate and acetate ionized by ammonium formate and ammonium acetate is small, the ionic mobility is high, the electrolyte conductivity of unit solute is high, the conductivity of the electrolyte paper after being soaked by the electrolyte is improved, and the chemical stability of the electrolyte can be improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A low temperature resistant capacitor, characterized by: comprises a heat insulation sleeve (11), an aluminum shell (21) arranged in the heat insulation sleeve (11), a capacitor element (31) arranged in the aluminum shell (21) and a sealing element (41) which is arranged in the aluminum shell (21) and is abutted against the capacitor element (31);
capacitor element (31) include with negative pole foil (311) of aluminum casing (21) medial surface laminating, with negative pole foil (311) medial surface laminating resistant low temperature electrolysis paper (312) and with resistant low temperature electrolysis paper (312) anode foil (313) of medial surface laminating, be equipped with resistant low temperature electrolysis paper (312) on the lateral surface of negative pole foil (311), be equipped with resistant low temperature electrolysis paper (312) on the medial surface of anode foil (313), equal rigid coupling has lead wire (314) on negative pole foil (311) and anode foil (313), the one end of lead wire (314) is worn out from sealing member (41), aluminum casing (21) and thermal-insulated sleeve (11) in proper order.
2. A low temperature resistant capacitor according to claim 1, wherein: and an electric heating wire (111) is arranged in the heat insulation sleeve (11) along the axis direction.
3. A low temperature resistant capacitor according to claim 1, wherein: the outer side surface of the heat insulation sleeve (11) is coated with a protective layer (112).
4. A low temperature resistant capacitor according to claim 1, wherein: and a heat insulation coating (211) is arranged on the outer surface of the aluminum shell (21).
5. A low temperature resistant capacitor according to claim 1, wherein: the aluminum shell (21) comprises a cylinder body (212) with an opening at the upper end and a cover body (213) fixedly connected with the opening end of the cylinder body (212).
6. A low temperature resistant capacitor according to claim 5, wherein: an explosion-proof groove (2121) is formed in the outer surface, far away from the opening end, of the barrel body (212).
7. A low temperature resistant capacitor according to claim 1, wherein: the diameter and length ratio of the cylinder formed by rolling the cathode foil (311), the low-temperature resistant electrolytic paper (312) and the anode foil (313) is 1: 2 to 1: 4.
8. A low temperature resistant capacitor according to claim 7, wherein: the density of the low temperature resistant electrolytic paper (312) is 0.75 g/cc to 0.85 g/cc.
9. A method for manufacturing a low temperature resistant capacitor for use in manufacturing a low temperature resistant capacitor according to any one of claims 1 to 8, comprising the steps of:
etching the aluminum foil to enlarge the surface area of the aluminum;
forming a dielectric layer on a surface of the anode foil (313);
slitting, namely cutting the cathode foil (311), the electrolytic paper and the anode foil (313) according to the product requirements;
winding to manufacture a capacitor element (31), inserting electrolytic paper between a cathode foil (311) and an anode foil (313), winding into a cylindrical shape, and connecting a lead (314) on the cathode foil (311) and the anode foil (313);
impregnating the capacitor element (31) with an electrolyte to impregnate the electrolyte onto the electrolytic paper so as to form low-temperature-resistant electrolytic paper (312);
and sealing, namely, the capacitor element (31) is arranged in the aluminum shell (21) and is sealed by a sealing piece (41), and then the outer side surface of the aluminum shell (21) is coated with the heat insulation sleeve (11) to be sent to the subsequent detection process so as to finish the residual capacitor manufacturing work.
10. The method of claim 9, wherein the step of forming the low temperature resistant capacitor further comprises: the electrolyte used in the impregnation step of the electrolyte consists of 70 percent of the mixed electrolyte solvent, 27 percent of the solute, 1 percent of the phosphate ester and 2 percent of the oxygen absorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110121590.3A CN112951601A (en) | 2021-01-28 | 2021-01-28 | Low-temperature-resistant capacitor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110121590.3A CN112951601A (en) | 2021-01-28 | 2021-01-28 | Low-temperature-resistant capacitor and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112951601A true CN112951601A (en) | 2021-06-11 |
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| CN202110121590.3A Pending CN112951601A (en) | 2021-01-28 | 2021-01-28 | Low-temperature-resistant capacitor and manufacturing method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19811862C1 (en) * | 1998-03-18 | 1999-06-24 | Siemens Matsushita Components | Electrolytic capacitor with plastic cap as container floor insulation |
| CN2651914Y (en) * | 2003-09-09 | 2004-10-27 | 常州二电仪光电子装备有限公司 | Low-temperature high-efficient electrolytic capacitor |
| CN201893240U (en) * | 2010-09-30 | 2011-07-06 | 胡枝清 | Anti-seismic low temperature resistant aluminium electrolytic capacitor |
| CN102723210A (en) * | 2012-06-25 | 2012-10-10 | 南通新三能电子有限公司 | Shock-resistant large aluminum electrolytic capacitor |
| CN206574609U (en) * | 2017-02-24 | 2017-10-20 | 深圳市杰容电子科技有限公司 | A kind of anti-expansion low temperature resistant aluminium electrolytic capacitor of multilayer proofing |
| CN210516496U (en) * | 2019-11-04 | 2020-05-12 | 南通江海储能技术有限公司 | Low-temperature lead type lithium capacitor |
| CN211181988U (en) * | 2019-12-27 | 2020-08-04 | 南通三鑫电子科技股份有限公司 | Ultralow temperature resistant electrolytic capacitor |
-
2021
- 2021-01-28 CN CN202110121590.3A patent/CN112951601A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19811862C1 (en) * | 1998-03-18 | 1999-06-24 | Siemens Matsushita Components | Electrolytic capacitor with plastic cap as container floor insulation |
| CN2651914Y (en) * | 2003-09-09 | 2004-10-27 | 常州二电仪光电子装备有限公司 | Low-temperature high-efficient electrolytic capacitor |
| CN201893240U (en) * | 2010-09-30 | 2011-07-06 | 胡枝清 | Anti-seismic low temperature resistant aluminium electrolytic capacitor |
| CN102723210A (en) * | 2012-06-25 | 2012-10-10 | 南通新三能电子有限公司 | Shock-resistant large aluminum electrolytic capacitor |
| CN206574609U (en) * | 2017-02-24 | 2017-10-20 | 深圳市杰容电子科技有限公司 | A kind of anti-expansion low temperature resistant aluminium electrolytic capacitor of multilayer proofing |
| CN210516496U (en) * | 2019-11-04 | 2020-05-12 | 南通江海储能技术有限公司 | Low-temperature lead type lithium capacitor |
| CN211181988U (en) * | 2019-12-27 | 2020-08-04 | 南通三鑫电子科技股份有限公司 | Ultralow temperature resistant electrolytic capacitor |
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Application publication date: 20210611 |