CN109390157A - Electrolytic capacitor and its manufacturing method - Google Patents
Electrolytic capacitor and its manufacturing method Download PDFInfo
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- CN109390157A CN109390157A CN201811158565.7A CN201811158565A CN109390157A CN 109390157 A CN109390157 A CN 109390157A CN 201811158565 A CN201811158565 A CN 201811158565A CN 109390157 A CN109390157 A CN 109390157A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 143
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000003792 electrolyte Substances 0.000 claims abstract description 97
- 239000011888 foil Substances 0.000 claims abstract description 83
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000012046 mixed solvent Substances 0.000 claims abstract description 35
- 239000000654 additive Substances 0.000 claims abstract description 24
- 230000000996 additive effect Effects 0.000 claims abstract description 24
- -1 amidine salt Chemical class 0.000 claims abstract description 24
- 125000000457 gamma-lactone group Chemical group 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 25
- 230000005611 electricity Effects 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims 2
- 238000005470 impregnation Methods 0.000 abstract description 12
- 238000002360 preparation method Methods 0.000 abstract description 12
- 230000000149 penetrating effect Effects 0.000 abstract description 11
- 238000005213 imbibition Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 7
- 238000005868 electrolysis reaction Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 208000021760 high fever Diseases 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—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
- H01G9/0029—Processes of manufacture
-
- 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
-
- 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
- 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)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The present invention relates to capacitor technology fields, disclose a kind of electrolytic capacitor and preparation method thereof, wherein, electrolytic capacitor includes positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper, negative foil and electrolyte, and positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil are from stacking gradually inwardly outside and constitute winding-structure, electrolyte, which contains, to be immersed in high density high voltage electrolytic paper and low-density high-hydroscopicity electrolytic paper, by the way that high density high voltage electrolytic paper is positioned close to the positive foil that tip is easily discharged, to ensure the safety of electrolytic capacitor, simultaneously using the electrolytic paper with stronger imbibition ability, effectively improve the penetrating power of electrolyte；In addition, electrolyte includes mixed solvent, solute and additive, mixed solvent includes ethylene glycol and gamma lactone, solute includes amidine salt, the electrolyte has the advantages that impregnation is fast, is impregnated without taking a significant amount of time, and the production efficiency of electrolytic capacitor is effectively improved.
Description
Technical field
The present invention relates to capacitor technology fields, more particularly to a kind of electrolytic capacitor and its manufacturing method.
Background technique
Currently, since the impurity such as burr, foil ash between the positive and negative foil of existing electrolytic capacitor will affect electrolytic capacitor
The security reliability of device, therefore generally use the thicker electrolytic paper of the more high and thick degree of density.But due to this electrolytic paper density
More high and thick degree is thicker, therefore electrolyte is caused to be difficult to permeate.For these reasons, existing electrolytic capacitor production when,
In order to keep electrolyte fully penetrated to electrolytic capacitor, need to impregnate product (2~3 hours) for a long time in the electrolytic solution,
It is lower so as to cause the production efficiency of electrolytic capacitor.
Summary of the invention
The object of the present invention is to provide a kind of electrolytic capacitor and its manufacturing methods, can effectively improve electrolyte
Penetrating power, to improve the production efficiency of electrolytic capacitor.
In order to solve the above technical problem, the present invention provides a kind of electrolytic capacitors, including positive foil, high density high voltage electricity
Solve paper, low-density high-hydroscopicity electrolytic paper, negative foil and electrolyte, it is the positive foil, the high density high voltage electrolytic paper, described low
Density high-hydroscopicity electrolytic paper and the negative foil are from stacking gradually inwardly outside and constitute winding-structure；The electrolyte, which contains, is immersed in institute
It states in high density high voltage electrolytic paper and the low-density high-hydroscopicity electrolytic paper；
Wherein, the electrolyte includes mixed solvent, solute and additive, and the mixed solvent includes ethylene glycol and gamma
Butyrolactone, the solute include amidine salt.
Preferably, the thickness range of the high density high voltage electrolytic paper are as follows: 20~60 μm, tightness range is
0.7~0.9g/cm3；And/or the thickness range of the low-density high-hydroscopicity electrolytic paper are as follows: 20~40 μm, tightness range is
0.4g/cm3Below.
Preferably, the positive foil is high pressure corrosive aluminum foil；And/or the negative foil is low pressure corrosive aluminum foil.
Preferably, according to the mass percentage content of the electrolyte, the mixed solvent includes 10%~
35% ethylene glycol and 60%~85% gamma lactone, the solute includes 3%~5% amidine salt, the additive
Accounting is 2%~5%.
Preferably, according to the mass percentage content of the electrolyte, the accounting of the mixed solvent is 91%
~93%.
The present invention provides a kind of electrolytic capacitor, including positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electricity
Solve paper, negative foil and electrolyte, and positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil are from outer court
Winding-structure is inside stacked gradually and constitutes, electrolyte, which contains, is immersed in high density high voltage electrolytic paper and low-density high-hydroscopicity electrolytic paper
In, by the way that high density high voltage electrolytic paper is positioned close to the positive foil that tip is easy electric discharge, to ensure the peace of electrolytic capacitor
Quan Xing, while using the electrolytic paper with stronger imbibition ability, to improve the penetrating power of electrolyte, thus different by collocation
The electrolytic paper of density, so that the penetrating power of electrolyte is effectively improved under the premise of ensuring positive and negative foil security isolation, from
And improve the production efficiency of electrolytic capacitor；Further, since electrolyte includes mixed solvent, solute and additive, mix molten
Agent includes ethylene glycol and gamma lactone, and solute includes amidine salt, so that the electrolyte has the advantages that impregnation is fast, therefore
It when production, is impregnated without taking a significant amount of time, only need to effectively be mentioned by injecting the electrolyte into capacitor core packet
The high production efficiency of electrolytic capacitor.
In order to solve identical technical problem, the present invention also provides a kind of production method of electrolytic capacitor, including it is following
Step:
Positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil are wound, capacitor is obtained
Device core packet；Wherein, positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil are from successively layer inwardly outside
It folds and constitutes winding-structure；
The capacitor core packet is heated with default heating condition；
In the capacitor core packet after injecting the electrolyte into heating；
The capacitor core packet for injecting electrolyte is packaged, electrolytic capacitor is obtained；
Wherein, the electrolyte includes mixed solvent, solute and additive, and the mixed solvent includes ethylene glycol and gamma
Butyrolactone, the solute include amidine salt.
Preferably, according to the mass percentage content of the electrolyte, the mixed solvent includes 10%~
35% ethylene glycol and 60%~85% gamma lactone, the solute includes 3%~5% amidine salt, the additive
Accounting is 2%~5%.
Preferably, the capacitor core packet that will inject electrolyte is packaged, and obtains electrolytic capacitor, specifically
Include:
The capacitor core package for injecting electrolyte is found into shell and rubber plug；
The capacitor core packet organized after founding shell and rubber plug is cleaned；
Capacitor core packet after cleaning is subjected to casing, obtains electrolytic capacitor.
Preferably, the capacitor core packet that will inject electrolyte is packaged, and obtains electrolytic capacitor, specifically
Include:
The capacitor core package for injecting electrolyte is found into shell and rubber plug；
The capacitor core packet organized after founding shell and rubber plug is cleaned；
Capacitor core packet after cleaning is subjected to SMD encapsulation, obtains electrolytic capacitor.
Preferably, the default heating condition are as follows: heating temperature be 60~200 degree, heating time for 1 minute~
15 minutes.
The present invention provides a kind of preparation method of electrolytic capacitor, firstly, by positive foil, high density high voltage electrolytic paper, low
Density high-hydroscopicity electrolytic paper and negative foil are wound, and obtain capacitor core packet；Wherein, positive foil, high density high voltage electrolytic paper,
Low-density high-hydroscopicity electrolytic paper and negative foil are from stacking gradually inwardly outside and constitute winding-structure；Then, to preset heating condition
Heat the capacitor core packet；Then, in the capacitor core packet after injecting the electrolyte into heating；Finally, injection is electrolysed
The capacitor core packet of liquid is packaged, and obtains electrolytic capacitor, so that the electrolytic capacitor after preparation includes positive foil, high density
High voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper, negative foil and electrolyte, and it is positive foil, high density high voltage electrolytic paper, low close
From stacking gradually and constituting winding-structure inwardly outside, electrolyte, which contains, is immersed in high density high voltage for degree high-hydroscopicity electrolytic paper and negative foil
In electrolytic paper and low-density high-hydroscopicity electrolytic paper, electric discharge is easy by the way that high density high voltage electrolytic paper is positioned close to tip
Positive foil, to ensure the safety of electrolytic capacitor, while using the electrolytic paper with stronger imbibition ability, to improve electrolyte
Penetrating power, thus by the electrolytic paper of collocation different densities, so that under the premise of ensuring positive and negative foil security isolation, effectively
Ground improves the penetrating power of electrolyte, to improve the production efficiency of electrolytic capacitor；Further, since electrolyte includes mixed
Bonding solvent, solute and additive, mixed solvent include ethylene glycol and gamma lactone, and solute includes amidine salt, so that the electrolyte
Have the advantages that impregnation is fast, it, only need to be by injecting the electrolyte into capacitor there is no need to take a significant amount of time to be impregnated
In core packet, the production efficiency of electrolytic capacitor is effectively improved.
Detailed description of the invention
Fig. 1 is the method flow diagram of the preparation method of the electrolytic capacitor in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of electrolytic capacitor of the preferred embodiment of the present invention, including positive foil, high density high voltage electrolytic paper, low-density are high
Water imbibition electrolytic paper, negative foil and electrolyte, the positive foil, the high density high voltage electrolytic paper, the low-density high-hydroscopicity
Electrolytic paper and the negative foil are from stacking gradually inwardly outside and constitute winding-structure；The electrolyte is resistance to containing the high density height is immersed in
It presses in electrolytic paper and the low-density high-hydroscopicity electrolytic paper；
Wherein, the electrolyte includes mixed solvent, solute and additive, and the mixed solvent includes ethylene glycol and gamma
Butyrolactone, the solute include amidine salt.
In embodiments of the present invention, it is easy the positive foil of electric discharge, close to tip by high density high voltage electrolytic paper to ensure
The safety of electrolytic capacitor, while using the electrolytic paper with stronger imbibition ability, to improve the penetrating power of electrolyte, from
And by the electrolytic paper of collocation different densities, so that effectively improving electrolysis under the premise of ensuring positive and negative foil security isolation
The penetrating power of liquid, to improve the production efficiency of electrolytic capacitor；In addition, electrolyte uses 10%~35% second two
Alcohol and 60%~85% gamma lactone composition mixed solvent, 3%~5% amidine salt composition solute and 2%~5%
Additive, reduce electrolyte viscosity, increase permeability, have the advantages that impregnation is fast, while electricity can be improved
The property at high and low temperature of liquid is solved, therefore in production, is impregnated without taking a significant amount of time, it only need to be by injecting the electrolyte into electricity
In container core packet, effectively improve the production efficiency of electrolytic capacitor, at the same the reliability of the electrolytic capacitor and
Consistency also has improvement.
In embodiments of the present invention, it should be noted that the high density high voltage electrolytic paper refers to that tightness is higher and has
There is the electrolytic paper of high voltage performance, the low-density high-hydroscopicity electrolytic paper refers to that tightness is lower and the stronger electrolysis of water absorbing properties
Paper.Preferably, the thickness range of the high density high voltage electrolytic paper are as follows: 20~60 μm, tightness range is 0.7~0.9g/
cm3；The thickness range of the low-density high-hydroscopicity electrolytic paper are as follows: 20~40 μm, tightness range is 0.4g/cm3Below.
In embodiments of the present invention, the positive foil is preferably high pressure corrosive aluminum foil, i.e. the height through excessive erosion and chemical conversion treatment
Jewelling foil；The negative foil is preferably low pressure corrosive aluminum foil, i.e. the etched foil of low pressure chemical conversion.
In embodiments of the present invention, according to the mass percentage content of the electrolyte, the mixed solvent includes 10%
~35% ethylene glycol and 60%~85% gamma lactone, the solute includes 3%~5% amidine salt, the additive
Accounting be 2%~5%.Preferably, the mass percentage content of the mixed solvent is 91%~93%.
Preferably, according to the mass percentage content of the electrolyte, the mixed solvent include 22% ethylene glycol and
70% gamma lactone, the solute include 4% amidine salt, and the accounting of the additive is 4%.
In order to solve identical technical problem, the embodiment of the present invention also provides a kind of production method of electrolytic capacitor, packet
Include following steps:
Positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil are wound, obtain by S11
Capacitor core packet；Wherein, positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil from outside inwardly according to
Secondary stacking simultaneously constitutes winding-structure；
S12 heats the capacitor core packet with default heating condition；
S13 is injected the electrolyte into the capacitor core packet after heating；
The capacitor core packet for injecting electrolyte is packaged, obtains electrolytic capacitor by S14；
Wherein, the electrolyte includes mixed solvent, solute and additive, and the mixed solvent includes ethylene glycol and gamma
Butyrolactone, the solute include amidine salt.
Preferably, according to the mass percentage content of the electrolyte, the mixed solvent includes 10%~
35% ethylene glycol and 60%~85% gamma lactone, the solute includes 3%~5% amidine salt, the additive
Accounting is 2%~5%.
In embodiments of the present invention, electric discharge is being easy just by the way that high density high voltage electrolytic paper is positioned close to tip
Foil, to ensure the safety of electrolytic capacitor, while using the electrolytic paper with stronger imbibition ability, to improve the infiltration of electrolyte
Saturating ability, thus by the electrolytic paper of collocation different densities, so that effectively being mentioned under the premise of ensuring positive and negative foil security isolation
The high penetrating power of electrolyte, to improve the production efficiency of electrolytic capacitor；Further, since electrolyte includes that mixing is molten
Agent, solute and additive, mixed solvent include ethylene glycol and gamma lactone, and solute includes amidine salt, so that the electrolyte has
The fast advantage of impregnation, thus in production, it is impregnated without taking a significant amount of time, it only need to be by injecting the electrolyte into electricity
In container core packet, the production efficiency of electrolytic capacitor is effectively improved.
In embodiments of the present invention, in order to prepare leading-wire type electrolytic capacitor, the step S14 in the present embodiment is specific
Include:
The capacitor core package for injecting electrolyte is found into shell and rubber plug；
The capacitor core packet organized after founding shell and rubber plug is cleaned；
Capacitor core packet after cleaning is subjected to casing, obtains electrolytic capacitor.
In embodiments of the present invention, in order to prepare patch electrolysis capacitor, the step S14 in the present embodiment is specific
Include:
The capacitor core package for injecting electrolyte is found into shell and rubber plug；
The capacitor core packet organized after founding shell and rubber plug is cleaned；
Capacitor core packet after cleaning is subjected to SMD encapsulation, obtains electrolytic capacitor.
In the prior art, usually first by a large amount of capacitance core packets being impregnated in the electrolytic solution take out, reuse group erect it is standby
The vertical shell of group and rubber plug, and in embodiments of the present invention, can same group erect standby upper completion group stand shell and rubber plug with
And 2 steps of instillation electrolyte, and the capacitance core packet only needs 20 seconds from injection electrolyte is heated to again to completing to encapsulate,
Substantially increase production efficiency, at the same avoid a large amount of capacitance core packets taken out from electrolyte during waiting to be transported by
To pollution, and avoid during waiting group is vertical since in air the moisture absorption occurs for long-time exposure.
In addition, it should be noted that, since water at 100 degree or more will generate gasification, when electrolytic capacitor by
It is easy to cause electrolytic capacitor air pressure inside to increase when high fever, changes so as to cause product outer shape, be finally easy shadow
The welding effect of product and the planarization of appearance are rung, and the present embodiment is avoided by directly erecting standby upper instillation electrolyte in group
Electrolytic capacitor or electrolyte exposure are made moist in air, when so as to avoid electrolytic capacitor due to by high fever lead to electricity
Electrolysis condenser air pressure inside increase and influence product outer shape, then ensure product welding effect and appearance it is smooth
Property.
In embodiments of the present invention, the default heating condition are as follows: heating temperature is 60~200 degree, and heating time is 1 point
Clock~15 minute.
Following preparation methods that following embodiment is provided and is used to illustrate electrolytic capacitor, specific as follows:
Embodiment 1
Positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil are wound, obtain by S21
Capacitor core packet；Wherein, positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil from outside inwardly according to
Secondary stacking simultaneously constitutes winding-structure；
S22 heats the capacitor core packet with default heating condition；Wherein, the default heating condition are as follows: heating temperature
It is 100 degree, heating time is 7 minutes；
S23 is injected the electrolyte into the capacitor core packet after heating；
The capacitor core packet for injecting electrolyte is packaged, obtains electrolytic capacitor by S24；
Wherein, the electrolyte includes mixed solvent, solute and additive, and the mixed solvent includes ethylene glycol and gamma
Butyrolactone, the solute include amidine salt；According to the mass percentage content of the electrolyte, the mixed solvent includes 22%
Ethylene glycol and 70% gamma lactone, the solute includes 4% amidine salt, and the accounting of the additive is 4%；
S25 carries out seasoned processing to the electrolytic capacitor, obtains qualified electrolytic capacitor；
Qualified electrolytic capacitor is carried out braid by S26；
Electrolytic capacitor after braid is tested for the property by S27.
Embodiment 2
The present embodiment the difference from embodiment 1 is that, in the present embodiment, contain according to the mass percent of the electrolyte
Amount, the mixed solvent includes 10% ethylene glycol and 85% gamma lactone, and the solute includes 3% amidine salt, described
The accounting of additive is 2%.Other techniques and step of the present embodiment are same as Example 1, do not do more repeat herein.
Embodiment 3
The present embodiment the difference from embodiment 1 is that, in the present embodiment, contain according to the mass percent of the electrolyte
Amount, the mixed solvent includes 35% ethylene glycol and 60% gamma lactone, and the solute includes 3% amidine salt, described
The accounting of additive is 2%.Other techniques and step of the present embodiment are same as Example 1, do not do more repeat herein.
Embodiment 4
The present embodiment the difference from embodiment 1 is that, in the present embodiment, contain according to the mass percent of the electrolyte
Amount, the electrolyte include 80% ethylene glycol, 16% ammonium salt and 4% additive.Other techniques and step of the present embodiment
It is same as Example 1, it does not do more repeat herein.
Embodiment 5
The present embodiment the difference from embodiment 1 is that, in the present embodiment, by positive foil, manila fiber electrolytic paper and negative
Foil is wound, and obtains capacitor core packet；Wherein, positive foil, manila fiber electrolytic paper and negative foil from stacking gradually simultaneously inwardly outside
Constitute winding-structure.Other techniques and step of the present embodiment are same as Example 1, do not do more repeat herein.
Embodiment 6
The present embodiment the difference from embodiment 1 is that, in the present embodiment, by the capacitor core after heating include leaching
Electrolyte, the impregnation time is 3 hours, and the capacitor core packet after impregnation is packaged, and obtains electrolytic capacitor.This implementation
The other techniques and step of example are same as Example 1, do not do more repeat herein.
Embodiment 7
The present embodiment and the difference of embodiment 4 are, in the present embodiment, by positive foil, manila fiber electrolytic paper and bear
Foil is wound, and obtains capacitor core packet；Wherein, positive foil, manila fiber electrolytic paper and negative foil from stacking gradually simultaneously inwardly outside
Constitute winding-structure.Other techniques and step of the present embodiment are same as Example 4, do not do more repeat herein.
Embodiment 8
The present embodiment and the difference of embodiment 4 are, include leaching by the capacitor core after heating in the present embodiment
Electrolyte, the impregnation time is 3 hours, and the capacitor core packet after impregnation is packaged, and obtains electrolytic capacitor.This implementation
The other techniques and step of example are same as Example 4, do not do more repeat herein.
Embodiment 9
The present embodiment and the difference of embodiment 5 are, include leaching by the capacitor core after heating in the present embodiment
Electrolyte, the impregnation time is 3 hours, and the capacitor core packet after impregnation is packaged, and obtains electrolytic capacitor.This implementation
The other techniques and step of example are same as Example 5, do not do more repeat herein.
The above embodiments 1~3 are the preparation method of electrolytic capacitor provided by the invention, and embodiment 4~9 is that comparison is real
Example is applied, test result is as follows for each embodiment:
Table 1
As it can be seen from table 1 relative to embodiment 4~9, the electricity of electrolysis prepared by (Examples 1 to 3) of the embodiment of the present invention
The DF (damage tangent angle) of container is substantially reduced (the lower DF the better), i.e. the property of electrolytic capacitor prepared by the embodiment of the present invention
It can be more preferably.In addition, the Reflow Soldering heatproof of the electrolytic capacitor of Examples 1 to 3 preparation can reach 260 degree in 10 seconds, and embodiment 4
The Reflow Soldering heatproof of the electrolytic capacitors of~9 preparations can only achieve 250 degree in 10 seconds, and pass through high temperature reflux postwelding, embodiment 1
The cosmetic variation of the electrolytic capacitor of~3 preparations is smaller relative to embodiment 4~9, it can be seen that, the electricity of Examples 1 to 3 preparation
The heat resistance of electrolysis condenser is better than the heat resistance of electrolytic capacitor prepared by embodiment 4~9.In addition, provided by the invention
Examples 1 to 3 avoids electrolytic capacitor or electrolyte exposure in air by directly erecting standby upper instillation electrolyte in group
Dampness causes electrolytic capacitor air pressure inside to increase and influence outside product when so as to avoid electrolytic capacitor due to by high fever
Portion's shape, and then ensure the welding effect of product and the planarization of appearance.
To sum up, the embodiment of the present invention provides a kind of electrolytic capacitor and preparation method thereof, wherein electrolytic capacitor includes just
Foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper, negative foil and electrolyte, and positive foil, high density high voltage electricity
From stacking gradually and constituting winding-structure inwardly outside, electrolyte, which contains, is immersed in height for solution paper, low-density high-hydroscopicity electrolytic paper and negative foil
In density high voltage electrolytic paper and low-density high-hydroscopicity electrolytic paper, by the way that high density high voltage electrolytic paper is positioned close to point
End is easy the positive foil of electric discharge, to ensure the safety of electrolytic capacitor, while using the electrolytic paper with stronger imbibition ability, with
The penetrating power of electrolyte is improved, thus by the electrolytic paper of collocation different densities, so that ensuring positive and negative foil security isolation
Under the premise of, the penetrating power of electrolyte is effectively improved, to improve the production efficiency of electrolytic capacitor；Further, since
Electrolyte includes mixed solvent, solute and additive, and mixed solvent includes ethylene glycol and gamma lactone, and solute includes amidine salt,
So that the electrolyte has the advantages that impregnation is fast, it, only need to be by that will be electrolysed there is no need to take a significant amount of time to be impregnated
Liquid injects in capacitor core packet, effectively improves the production efficiency of electrolytic capacitor, while avoiding in the prior art
Electrolyte, which is recycled, leads to electrolyte contamination, while avoid causes electrolyte aqueous during Reusability electrolyte
Amount increases.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of electrolytic capacitor, which is characterized in that including positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electricity
Solve paper, negative foil and electrolyte, the positive foil, the high density high voltage electrolytic paper, the low-density high-hydroscopicity electrolytic paper and
The negative foil is from stacking gradually inwardly outside and constitute winding-structure；The electrolyte, which contains, is immersed in the high density high voltage electrolytic paper
In the low-density high-hydroscopicity electrolytic paper；
Wherein, the electrolyte includes mixed solvent, solute and additive, and the mixed solvent includes in ethylene glycol and gamma fourth
Ester, the solute include amidine salt.
2. electrolytic capacitor as described in claim 1, which is characterized in that the thickness range of the high density high voltage electrolytic paper
Are as follows: 20~60 μm, tightness range is 0.7~0.9g/cm3；And/or the thickness range of the low-density high-hydroscopicity electrolytic paper
Are as follows: 20~40 μm, tightness range is 0.4g/cm3Below.
3. electrolytic capacitor as described in claim 1, which is characterized in that the positive foil is high pressure corrosive aluminum foil；And/or institute
Stating negative foil is low pressure corrosive aluminum foil.
4. electrolytic capacitor as claimed in any one of claims 1 to 3, which is characterized in that according to the quality hundred of the electrolyte
Divide than content, the mixed solvent includes 10%~35% ethylene glycol and 60%~85% gamma lactone, the solute
Including 3%~5% amidine salt, the accounting of the additive is 2%~5%.
5. electrolytic capacitor as claimed in claim 4, which is characterized in that according to the mass percentage content of the electrolyte,
The accounting of the mixed solvent is 91%~93%.
6. a kind of production method of electrolytic capacitor, which comprises the following steps:
Positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil are wound, capacitor core is obtained
Packet；Wherein, positive foil, high density high voltage electrolytic paper, low-density high-hydroscopicity electrolytic paper and negative foil from stacking gradually simultaneously inwardly outside
Constitute winding-structure；
The capacitor core packet is heated with default heating condition；
In the capacitor core packet after injecting the electrolyte into heating；
The capacitor core packet for injecting electrolyte is packaged, electrolytic capacitor is obtained；
Wherein, the electrolyte includes mixed solvent, solute and additive, and the mixed solvent includes in ethylene glycol and gamma fourth
Ester, the solute include amidine salt.
7. the production method of electrolytic capacitor as claimed in claim 6, which is characterized in that according to the quality hundred of the electrolyte
Divide than content, the mixed solvent includes 10%~35% ethylene glycol and 60%~85% gamma lactone, the solute
Including 3%~5% amidine salt, the accounting of the additive is 2%~5%.
8. the production method of electrolytic capacitor as claimed in claim 6, which is characterized in that the capacitor that electrolyte will be injected
Device core packet is packaged, and is obtained electrolytic capacitor, is specifically included:
The capacitor core package for injecting electrolyte is found into shell and rubber plug；
The capacitor core packet organized after founding shell and rubber plug is cleaned；
Capacitor core packet after cleaning is subjected to casing, obtains electrolytic capacitor.
9. the production method of electrolytic capacitor as claimed in claim 6, which is characterized in that the capacitor that electrolyte will be injected
Device core packet is packaged, and is obtained electrolytic capacitor, is specifically included:
The capacitor core package for injecting electrolyte is found into shell and rubber plug；
The capacitor core packet organized after founding shell and rubber plug is cleaned；
Capacitor core packet after cleaning is subjected to SMD encapsulation, obtains electrolytic capacitor.
10. such as the production method of the described in any item electrolytic capacitors of claim 6~9, which is characterized in that the default heating
Condition are as follows: heating temperature is 60~200 degree, and heating time is 1 minute~15 minutes.
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| CN201811158565.7A CN109390157A (en) | 2018-09-30 | 2018-09-30 | Electrolytic capacitor and its manufacturing method |
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| CN201811158565.7A CN109390157A (en) | 2018-09-30 | 2018-09-30 | Electrolytic capacitor and its manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600268A (en) * | 2019-08-14 | 2019-12-20 | 益阳艾华富贤电子有限公司 | Manufacturing method of solid-liquid mixed capacitor with electrolyte injected quantitatively |
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| CN2672825Y (en) * | 2003-12-09 | 2005-01-19 | 浙江凯恩特种材料股份有限公司 | Electrolytic capacitor paper |
| CN1737963A (en) * | 2005-05-12 | 2006-02-22 | 珠海华冠电容器有限公司 | Method for making high-frequency low-impedance capacitor |
| JP2006253728A (en) * | 2006-06-23 | 2006-09-21 | Nippon Kodoshi Corp | Electrolytic capacitor |
| CN102226978A (en) * | 2011-03-31 | 2011-10-26 | 肇庆绿宝石电子有限公司 | Anti-lightning guide pin type safe aluminum electrolytic capacitor and production method thereof |
| CN103560006A (en) * | 2013-10-12 | 2014-02-05 | 珠海华冠电容器有限公司 | Manufacturing method for solid-liquid mixed type aluminum electrolytic capacitor |
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| CN2672825Y (en) * | 2003-12-09 | 2005-01-19 | 浙江凯恩特种材料股份有限公司 | Electrolytic capacitor paper |
| CN1737963A (en) * | 2005-05-12 | 2006-02-22 | 珠海华冠电容器有限公司 | Method for making high-frequency low-impedance capacitor |
| JP2006253728A (en) * | 2006-06-23 | 2006-09-21 | Nippon Kodoshi Corp | Electrolytic capacitor |
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| CN110600268A (en) * | 2019-08-14 | 2019-12-20 | 益阳艾华富贤电子有限公司 | Manufacturing method of solid-liquid mixed capacitor with electrolyte injected quantitatively |
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