CN112735827A - Lead wire type aluminum electrolytic capacitor - Google Patents
Lead wire type aluminum electrolytic capacitor Download PDFInfo
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- CN112735827A CN112735827A CN202011610498.5A CN202011610498A CN112735827A CN 112735827 A CN112735827 A CN 112735827A CN 202011610498 A CN202011610498 A CN 202011610498A CN 112735827 A CN112735827 A CN 112735827A
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- Prior art keywords
- electrolytic capacitor
- aluminum foil
- leaded
- capacitor
- aluminum
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 61
- 239000003990 capacitor Substances 0.000 title claims abstract description 51
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 title claims description 4
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 5
- 239000011888 foil Substances 0.000 claims description 42
- 229920001971 elastomer Polymers 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- 229920005549 butyl rubber Polymers 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000000137 annealing Methods 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 150000001875 compounds Chemical class 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
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 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
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/008—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/035—Liquid electrolytes, e.g. impregnating materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
- H01G9/045—Electrodes or formation of dielectric layers thereon characterised by the material based on aluminium
-
- 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
- H01G9/055—Etched foil electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/07—Dielectric layers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention provides a lead type aluminum electrolytic capacitor, which comprises: the core is arranged in the shell and is soaked in electrolyte in the shell, and the electrolyte of the electrolyte adopts nanoscale long carbon chain branched chain type organic ammonium salt. Based on the technical scheme of the invention, the upper limit of the use temperature range of the capacitor is improved, and the stability of the capacitor is improved; and then make aluminium electrolytic capacitor have stronger high temperature resistance, the performance is more stable, when using in the high temperature service environment in the power field, have reliable performance and longer life.
Description
Technical Field
The invention relates to the technical field of capacitors, in particular to a lead type aluminum electrolytic capacitor.
Background
The lead type aluminum electrolytic capacitor is used as a common component on an electronic circuit of electrical equipment and plays electrical roles of filtering, bypassing, coupling, decoupling, phase inversion and the like. The upper limit of the service temperature of the conventional lead type aluminum electrolytic capacitor product is generally about 105 ℃, and the limitation of the temperature causes the practical use of the capacitor to have certain limitation. In power supply equipment, the service temperature of the capacitor often exceeds 105 ℃, and when the conventional lead type aluminum electrolytic capacitor is applied to the field of power supply equipment, faults are easily caused due to overhigh temperature, and the service life is short.
Therefore, in view of the field of power supply equipment, a capacitor capable of adapting to higher temperature needs to be provided, so that in the high-temperature environment of the power supply equipment, the capacitor can ensure the effectiveness and the service life of the function, and further avoid premature failure of the power supply due to the problem of the capacitor.
Disclosure of Invention
In order to solve the problems in the prior art, the application provides a lead type aluminum electrolytic capacitor, which increases the upper limit of the use temperature range of the capacitor from 105 ℃ to 125 ℃, and improves the reliability of the capacitor in use in a high-temperature environment.
The invention relates to a lead type aluminum electrolytic capacitor, comprising:
a housing;
the core is arranged in the shell and is soaked in electrolyte in the shell, and the electrolyte of the electrolyte adopts nanoscale long carbon chain branched chain type organic ammonium salt.
In one embodiment, the core comprises an anode aluminum foil, a cathode aluminum foil, and an electrolytic paper; the anode aluminum foil is a multi-stage frequency conversion corrosion aluminum foil which is annealed in the optical foil stage, the annealing temperature is 400-500 ℃, and the cathode aluminum foil is a formed aluminum foil. By the embodiment, the annealing treatment process is added to the anode aluminum foil at the optical foil stage, the annealing temperature reaches 400-500 ℃, the precipitation of internal impurities is facilitated, and the reduction of impurities is facilitated to ensure the corrosion speed of the aluminum foil, so that the electrostatic capacity of the capacitor is ensured.
In one embodiment, the electrolytic paper has a thickness of 40 to 50 μm and a density of 40 to 55g/cm3It is made up by adopting double-layer cylinder mould composite papermaking process. Through this embodiment, the electrolytic paper adopts double-deck mould compound papermaking to make, and thickness, density all increase for the withstand voltage ability after the stack promotes, can reduce the angle of loss, the self heating and Equivalent Series Resistance (ESR) of condenser simultaneously.
In one embodiment, the anode aluminum foil and the cathode aluminum foil are led out with lead wires, the lead wires are low-voltage formation guide pins, and the formation voltage of the low-voltage formation guide pins is not less than 140V.
In one embodiment, the shell is a tubular structure with one closed end and an open end, the open end is provided with a sealing rubber plug, and the sealing rubber plug is made of butyl rubber polymer. Through this embodiment, the inside relative leakproofness of condenser is guaranteed to the sealed plug, keeps apart the influence of external to the condenser.
In one embodiment, the butyl rubber content of the butyl rubber polymer is not less than 30%. Through this embodiment, further strengthen the stability of sealed plug to promote the reliability of condenser.
In one embodiment, the portions of the housing adjacent to the opening are each recessed circumferentially inward to form an annular waisted portion. Through this embodiment, the beam waist reduces the internal diameter of the shell that is close to the opening part to this forms limit structure, is used for guaranteeing the relatively fixed of each part position in the shell inside, guarantees the stability of capacitor structure.
In one embodiment, the outer portion of the housing is further sleeved with an insulating sleeve. With this embodiment, the bushing has two main functions: firstly, products are marked, such as trademarks, capacities, voltages, models, temperatures, polarities and the like; and secondly, the insulation function is realized, and the short circuit, the static electricity and the like of the polar shell are prevented.
In one embodiment, the electrolytic paper comprises a first electrolytic paper and a second electrolytic paper, and the anode aluminum foil, the first electrolytic paper, the cathode aluminum foil and the second electrolytic paper are sequentially overlapped to form the core.
In one embodiment, the core is wound in a cylindrical shape inside the housing.
The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.
Compared with the prior art, the lead type aluminum electrolytic capacitor provided by the invention at least has the following beneficial effects:
according to the lead type aluminum electrolytic capacitor, the electrolyte of the capacitor, the aluminum foil and the electrolytic paper of the core and the lead-out guide pin of the core are designed in a targeted manner, so that the upper limit of the use temperature range of the capacitor is improved, and the stability of the capacitor is improved; and then make aluminium electrolytic capacitor have stronger high temperature resistance, the performance is more stable, when using in the high temperature service environment in the power field, have reliable performance and longer life.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 shows a cross-sectional view of the overall structure of the capacitor of the present invention;
fig. 2 shows a structural view of a core of the capacitor of the present invention in a developed state.
In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.
Reference numerals:
1-shell, 11-waist, 2-core, 21-anode aluminum foil, 22-cathode aluminum foil, 23-electrolytic paper, 231-first electrolytic paper, 232-second electrolytic paper, 3-outgoing line, 4-sealing rubber plug and 5-sleeve.
Detailed Description
The invention will be further explained with reference to the drawings.
The invention provides a lead type aluminum electrolytic capacitor, comprising:
a housing 1;
the core 2 is arranged in the shell 1, and the core 2 is soaked in the electrolyte in the shell 1, wherein the electrolyte of the electrolyte adopts nano-scale long carbon chain branched chain type organic ammonium salt.
In particular, in the field of capacitors, the limitation of the use temperature of the capacitor is actually mainly due to the limitation of the use temperature of the electrolyte, so that improving the stability of the electrolyte of the capacitor in a high-temperature environment is one of the most effective means for enhancing the high-temperature resistance of the capacitor.
The nanometer long carbon chain branched organic ammonium salt is used as the electrolyte of the electrolyte, the temperature upper limit for keeping stability can reach 125-130 ℃ or even higher, and further the use temperature upper limit of the capacitor can be improved.
Preferably, an insulating sleeve 5 is further sleeved outside the housing 1.
Specifically, the sleeve has two main functions: firstly, products are marked, such as trademarks, capacities, voltages, models, temperatures, polarities and the like; and secondly, the insulation function is realized, and the short circuit, the static electricity and the like of the polar shell are prevented. The casing is sleeved with a sleeve which is generally used as the last process of the manufacturing part in the production process of the capacitor. After the sleeve is sleeved, the capacitor is aged, and after sorting testing, a good product is selected as a qualified product.
In one embodiment, the core 2 comprises an anode aluminum foil 21, a cathode aluminum foil 22, and an electrolytic paper 23; wherein, the anode aluminum foil 21 is a multi-stage frequency conversion corrosion aluminum foil which is annealed at the optical foil stage, the annealing temperature is 400-500 ℃, and the cathode aluminum foil 22 is a formed aluminum foil.
Specifically, the annealing treatment process is added to the anode aluminum foil in the optical foil stage, the annealing temperature reaches 400-500 ℃, the precipitation of internal impurities is facilitated, and the reduction of impurities is beneficial to ensuring the corrosion speed of the aluminum foil, so that the electrostatic capacity of the capacitor is ensured.
In one embodiment, the electrolytic paper 23 has a thickness of 40 to 50 μm and a density of 40 to 55g/cm3It is made up by adopting double-layer cylinder mould composite papermaking process.
Specifically, the electrolytic paper is manufactured by double-layer rotary screen composite papermaking, the thickness and the density are increased, the voltage resistance after superposition is improved, and meanwhile, the loss angle, the self-heating and the Equivalent Series Resistance (ESR) of the capacitor can be reduced.
In one embodiment, the lead wires 3 are led out from both the anode aluminum foil 21 and the cathode aluminum foil 22, the lead wires 3 are low voltage formation guide pins, and the formation voltage of the low voltage formation guide pins is not less than 140V.
In one embodiment, the shell 1 is a tubular structure with one closed end and an open end, a sealing rubber plug 4 is arranged at the open end, and the sealing rubber plug 4 is made of butyl rubber polymer.
Preferably, the butyl rubber content of the butyl rubber polymer is not less than 30%.
In particular, in order to enhance the stability of the sealing rubber plug and thus improve the reliability of the capacitor, the sealing rubber plug made of the corresponding butyl rubber polymer needs to be tested. The sealing rubber plug is placed in an environment at 125 ℃, the hardness of the sealing rubber plug is tested after the sealing rubber plug is placed for 72 hours, and the hardness variation of the sealing rubber plug before and after the test is not more than 5 percent, so that the requirement is met.
In one embodiment, the portions of the housing 1 near the opening are all recessed inward in the circumferential direction to form a ring-shaped corset portion 11.
Specifically, beam waist portion is formed along the circumference extrusion of shell through beam waist device in the production process of condenser, and its aim at reduces the internal diameter of the shell that is close to the opening part to this forms limit structure, is used for guaranteeing the relatively fixed of each part position of shell inside, guarantees the stability of condenser structure.
In one embodiment, the electrolytic paper 23 comprises a first electrolytic paper 231 and a second electrolytic paper 232, and the anode aluminum foil 21, the first electrolytic paper 231, the cathode aluminum foil 22 and the second electrolytic paper 232 are sequentially overlapped to form the core 2.
In one embodiment, the core 2 is wound in a cylindrical shape inside the housing 1.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. A leaded aluminum electrolytic capacitor, comprising:
a housing;
the core is arranged in the shell and is soaked in electrolyte in the shell, and the electrolyte of the electrolyte adopts nanoscale long carbon chain branched chain type organic ammonium salt.
2. The leaded aluminum electrolytic capacitor of claim 1, wherein the core comprises an anode aluminum foil, a cathode aluminum foil, and electrolytic paper;
the anode aluminum foil is a multi-stage frequency conversion corrosion aluminum foil which is annealed in the optical foil stage, the annealing temperature is 400-500 ℃, and the cathode aluminum foil is a formed aluminum foil.
3. The leaded aluminum electrolytic capacitor of claim 2, wherein the electrolytic paper has a thickness of 40 to 50 μm and a density of 40 to 55g/cm3It is made up by adopting double-layer cylinder mould composite papermaking process.
4. The leaded aluminum electrolytic capacitor of claim 2 or 3, wherein a lead wire is led out from both the anode aluminum foil and the cathode aluminum foil, the lead wire is a low voltage formation guide pin, and the formation voltage of the low voltage formation guide pin is not less than 140V.
5. The leaded aluminum electrolytic capacitor of claim 1, wherein the housing is a tubular structure with one end closed and the other end provided with an opening, the opening is provided with a sealing rubber plug, and the sealing rubber plug is made of butyl rubber polymer.
6. The leaded aluminum electrolytic capacitor of claim 5, wherein the butyl rubber polymer has a butyl rubber content of not less than 30%.
7. The leaded aluminum electrolytic capacitor of claim 5, wherein the portions of the case proximate the opening are each recessed circumferentially to form a toroidal pinch portion.
8. The leaded aluminum electrolytic capacitor of claim 1 further comprising an insulative sleeve surrounding the outer housing.
9. The leaded aluminum electrolytic capacitor of claim 2, wherein the electrolytic paper comprises a first electrolytic paper and a second electrolytic paper, and the anode aluminum foil, the first electrolytic paper, the cathode aluminum foil and the second electrolytic paper are sequentially overlapped to form the core.
10. The leaded aluminum electrolytic capacitor of claim 2 or 9, wherein the core is wound in a cylindrical shape inside the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011610498.5A CN112735827A (en) | 2020-12-30 | 2020-12-30 | Lead wire type aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011610498.5A CN112735827A (en) | 2020-12-30 | 2020-12-30 | Lead wire type aluminum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112735827A true CN112735827A (en) | 2021-04-30 |
Family
ID=75610967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011610498.5A Pending CN112735827A (en) | 2020-12-30 | 2020-12-30 | Lead wire type aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112735827A (en) |
-
2020
- 2020-12-30 CN CN202011610498.5A patent/CN112735827A/en active Pending
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