CN107221437A - A kind of low-voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof - Google Patents
A kind of low-voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof Download PDFInfo
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- CN107221437A CN107221437A CN201710403684.3A CN201710403684A CN107221437A CN 107221437 A CN107221437 A CN 107221437A CN 201710403684 A CN201710403684 A CN 201710403684A CN 107221437 A CN107221437 A CN 107221437A
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- Prior art keywords
- electrolyte
- low
- electrolytic capacitor
- aluminum electrolytic
- voltage aluminum
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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 OR LIGHT-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
Abstract
The invention discloses a kind of electrolyte of low-voltage aluminum electrolytic capacitor and preparation method thereof, the electrolyte includes the component that following weight is matched：Ethylene glycol 69%~70%, deionized water 14%~15%, nano-TiO22%~3%, ammonium azelate 7%~9%；Azelaic acid 4.0%~4.5%；Disappear hydrogen agent 0.20%~0.25%, retardant 0.40%~0.50%, waterproof oxidant 0.20%~0.25%, drain current suppressing agent 0.20%~0.25%, improves the additive 0.20%~0.25% of Formation and characteristics.Using above-mentioned technical proposal, the flash over voltage and its cation that can improve electrolyte repair oxidability, reduce the precipitation and the generation of water of hydrogen in the course of work, improve the quality of electrolyte, and meet management and control of the EU REACH Legislation to boric acid class material.
Description
Technical field
The present invention relates to electrolyte for aluminum electrolytic capacitor field, more particularly to a kind of electricity of low-voltage aluminum electrolytic capacitor
Solve liquid and preparation method thereof.
Background technology
At present, domestic and international aluminium electrolutic capacitor widely uses ethylene glycol+borate salt system and prepares aluminium electrolutic capacitor electrolysis
Liquid.Make the electrolyte prepared in this way, the advantage is that technical comparative maturity, process for preparation is simple to operate, is configured to
This low and in the market buying is easy, disclosure satisfy that the electric property of capacitor general work state.But use ethylene glycol+boric acid body
It is that the electrolyte prepared can be produced between the crystallization water, and ethylene glycol and boric acid from boric acid because esterification generates substantial amounts of contracting
Heshui, so as to cause the moisture inside electrolyte system to raise, uses the electricity under the conditions of the temperature in use more than 100 DEG C
When solving liquid, the water in electrolyte will be evaporated to vapor, and the rise of electrolytic capacitor assembly internal pressure finally reduces its applied at elevated temperature longevity
Life.
In addition, SVHC is to pay high attention to material, from EU REACH Legislation.On June 18th, 2010, boric acid class material
It is classified as the 3rd class SVHC and becomes a full member of in candidate list.There is the product of boric acid class material to be put into emphasis management and control pair from this
As, therefore it will be a brand-new problem that an aluminium electrolutic capacitor manufacturing enterprise faces to develop the electrolyte of not boronic acid containing.
The content of the invention
The present invention provides a kind of electrolyte of low-voltage aluminum electrolytic capacitor and preparation method thereof, and the electrolyte provided has
Good heat endurance, leakage current is low, low impedance at high frequency and high-temperature long life performance and meet EU REACH Legislation to boric acid
The management and control requirement of class material.
To achieve these goals, the technical scheme taken of the present invention is：
The composition and their percentage by weight of a kind of electrolyte of low-voltage aluminum electrolytic capacitor：Ethylene glycol 69%~
70%, deionized water 14%~15%, nano-TiO22%~3%, ammonium azelate 7%~9%；Azelaic acid 4.0%~4.5%；
Disappear hydrogen agent 0.20%~0.25%, retardant 0.40%~0.50%, waterproof oxidant 0.20%~0.25%, drain current suppressing
Agent 0.20%~0.25%, improves the additive 0.20%~0.25% of Formation and characteristics.
Further, polypropylene amine is selected in the hydrogen agent that disappears, and retardant selects phosphorous acid, and waterproof oxidant is 6000 from molecular weight
Kayexalate, drain current suppressing agent selects strontium nitrate, and the additive for improving Formation and characteristics selects maleic acid.
Present invention also offers a kind of preparation method of the electrolyte of low-voltage aluminum electrolytic capacitor, the preparation method includes
Following steps：
(1) percentage by weight of the component is pressed, by nano-TiO2, ammonium azelate and deionized water add ethylene glycol solution
In be well mixed, and be heated to 75 DEG C；
(2) press in the mass ratio of the component, the mixed solution that azelaic acid is added to step (1), stir, treat each
After raw material fully dissolves, the solution is heated to stop heating after 100 DEG C；
(3) after mixed solution temperature drop in step (2) to after 75 DEG C, by the mass ratio of the component, addition disappears hydrogen
Agent, retardant, waterproof oxidant, electric leakage inhibitor, the additive for improving Formation and characteristics, finally, treat that it naturally cools to room temperature,
Just the electrolyte of aluminium electrolutic capacitor can be made.
Compared with prior art, it with the addition of nano-TiO in the electrolyte of aluminium electrolutic capacitor of the present invention2Solution and
Improve the additive maleic acid of Formation and characteristics, TiO2Dielectric constant it is higher, can be by the TiO of high dielectric property2It is incorporated into compound
In film, this can both improve the dielectric properties of composite membrane, but also can increase the dieletric strength of pellumina.Therefore, originally
The electrolyte of aluminium electrolutic capacitor described in invention has good heat endurance at high temperature, and leakage current is low, high frequency low-resistance
Anti- and high-temperature long life performance.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, the technology of this area
Personnel can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiment 1
Prepare a kind of electrolyte of low-voltage aluminum electrolytic capacitor, including step：
(1) by weight percentage by 3% nano-TiO2, 8.8% ammonium azelate and 14% deionized water add
It is well mixed in 69% ethylene glycol solution, and is heated to 75 DEG C；
(2) azelaic acid is added in the mixed solution of step (1), stirred, will be described after each raw material fully dissolves
Solution is heated to after 100 DEG C stop heating；
(3) after mixed solution temperature drop in step (2) to after 75 DEG C, by the percentage by weight of the component, add
The 0.20% hydrogen agent that disappears, 0.40% retardant, 0.20% waterproof oxidant, 0.20% electric leakage inhibitor, 0.20%
The additive of Formation and characteristics is improved, is well mixed, is treated that it naturally cools to room temperature, the electrolysis of aluminium electrolutic capacitor just can be made
Liquid.
Wherein, polypropylene amine is selected in the hydrogen agent that disappears, and retardant selects phosphorous acid, and waterproof oxidant is 6000 from molecular weight
Strontium nitrate is selected in kayexalate, drain current suppressing agent, and the additive for improving Formation and characteristics selects maleic acid.
Embodiment 2
The step of it prepares the electrolyte of low-voltage aluminum electrolytic capacitor is same as Example 1, and difference feature is to match (weight
Measure percentage)：Ethylene glycol 70%, deionized water 15%, nano-TiO22%, ammonium azelate 7%；Azelaic acid 4.5%；Disappear hydrogen agent
0.25%, retardant 0.5%, waterproof oxidant 0.25%, drain current suppressing agent 0.25% improves the additive of Formation and characteristics
0.25%.
Wherein, polypropylene amine is selected in the hydrogen agent that disappears, and retardant selects phosphorous acid, and waterproof oxidant is 6000 from molecular weight
Strontium nitrate is selected in kayexalate, drain current suppressing agent, and the additive for improving Formation and characteristics selects maleic acid.
Embodiment 3
The step of it prepares the electrolyte of low-voltage aluminum electrolytic capacitor is same as Example 1, and difference feature is to match (weight
Measure percentage)：Ethylene glycol 70%, deionized water 14%, nano-TiO23%, ammonium azelate 7%；Azelaic acid 4.5%；Disappear hydrogen agent
0.25%, retardant 0.50%, waterproof oxidant 0.25%, drain current suppressing agent 0.25% improves the additive of Formation and characteristics
0.25%.
Wherein, polypropylene amine is selected in the hydrogen agent that disappears, and retardant selects phosphorous acid, and waterproof oxidant is 6000 from molecular weight
Strontium nitrate is selected in kayexalate, drain current suppressing agent, and the additive for improving Formation and characteristics selects maleic acid.
Claims (7)
1. a kind of electrolyte of low-voltage aluminum electrolytic capacitor, it is characterised in that the composition and their weight of the composition electrolyte
Measuring percentage is：Ethylene glycol 69%~70%, deionized water 14%~15%, nano-TiO22%~3%, ammonium azelate 7%~
9%；Azelaic acid 4.0%~4.5%；Disappear hydrogen agent 0.20%~0.25%, retardant 0.40%~0.50%, waterproof oxidant
0.20%~0.25%, drain current suppressing agent 0.20%~0.25% improves the additive 0.20%~0.25% of Formation and characteristics.
2. a kind of electrolyte of low-voltage aluminum electrolytic capacitor according to claim 1, it is characterised in that：The hydrogen agent that disappears is
Polypropylene amine.
3. a kind of electrolyte of low-voltage aluminum electrolytic capacitor according to claim 1, it is characterised in that：The retardant is
Phosphorous acid.
4. a kind of electrolyte of low-voltage aluminum electrolytic capacitor according to claim 1, it is characterised in that：The waterproof oxidation
Agent is the kayexalate that molecular weight is 6000.
5. a kind of electrolyte of low-voltage aluminum electrolytic capacitor according to claim 1, it is characterised in that：The leakage current suppression
Preparation is strontium nitrate.
6. a kind of electrolyte of low-voltage aluminum electrolytic capacitor according to claim 1, it is characterised in that：Described improve is formed
The additive of characteristic is maleic acid.
7. a kind of preparation method of the electrolyte of low-voltage aluminum electrolytic capacitor, it is characterised in that the preparation method includes following
Step：
(1) mass ratio as described in claim 1, by nano-TiO2, ammonium azelate and deionized water add in ethylene glycol solution and mix
Close uniform, and be heated to 75 DEG C；
(2) in the mass ratio as described in claim 1, the mixed solution that azelaic acid is added to step (1), stir, treat each
After raw material fully dissolves, the solution is heated to stop heating after 100 DEG C；
(3) after mixed solution temperature drop in step (2) to after 75 DEG C, the mass ratio as described in claim 1, addition disappears hydrogen
Agent, retardant, waterproof oxidant, electric leakage inhibitor, the additive for improving Formation and characteristics, finally, treat that it naturally cools to room temperature,
Just the electrolyte of low-voltage aluminum electrolytic capacitor can be made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403684.3A CN107221437A (en) | 2017-06-01 | 2017-06-01 | A kind of low-voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710403684.3A CN107221437A (en) | 2017-06-01 | 2017-06-01 | A kind of low-voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof |
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| CN107221437A true CN107221437A (en) | 2017-09-29 |
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| CN201710403684.3A Pending CN107221437A (en) | 2017-06-01 | 2017-06-01 | A kind of low-voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440530A (en) * | 2018-10-04 | 2019-03-08 | 南京航空航天大学溧水仿生产业研究院有限公司 | The preparation method of aluminum oxide waterproof paper |
| CN110047656A (en) * | 2019-04-16 | 2019-07-23 | 益阳市开元电子有限公司 | Middle jewelling electrolytic capacitor low-leakage current Working electrolyte and preparation method thereof |
| CN112700965A (en) * | 2020-12-18 | 2021-04-23 | 肇庆市华胜电子有限公司 | Vehicle-mounted high-frequency low-capacitance-attenuation liquid aluminum electrolytic capacitor and production method thereof |
Citations (4)
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|---|---|---|---|---|
| JPS5493443A (en) * | 1977-12-29 | 1979-07-24 | Marukon Denshi Kk | Electrolyte for driving electrolytic capacitor |
| EP1213778A2 (en) * | 2000-12-06 | 2002-06-12 | Nisshinbo Industries, Inc. | Polymer gel electrolyte secondary cell, and electrical double-layer capacitor |
| CN101887803A (en) * | 2010-06-23 | 2010-11-17 | 东莞万利信新材料元件有限公司 | Ultrahigh pressure large-scale aluminum electrolytic capacitor and driving electrolyte thereof |
| CN103632851A (en) * | 2012-08-27 | 2014-03-12 | 深圳市金元电子技术有限公司 | High-conductivity boron series-free working electrolyte and preparation method thereof |
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2017
- 2017-06-01 CN CN201710403684.3A patent/CN107221437A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5493443A (en) * | 1977-12-29 | 1979-07-24 | Marukon Denshi Kk | Electrolyte for driving electrolytic capacitor |
| EP1213778A2 (en) * | 2000-12-06 | 2002-06-12 | Nisshinbo Industries, Inc. | Polymer gel electrolyte secondary cell, and electrical double-layer capacitor |
| CN101887803A (en) * | 2010-06-23 | 2010-11-17 | 东莞万利信新材料元件有限公司 | Ultrahigh pressure large-scale aluminum electrolytic capacitor and driving electrolyte thereof |
| CN103632851A (en) * | 2012-08-27 | 2014-03-12 | 深圳市金元电子技术有限公司 | High-conductivity boron series-free working electrolyte and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 高泉涌等: "铝电解电容器工作电解液添加剂及其应用", 《广东化工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440530A (en) * | 2018-10-04 | 2019-03-08 | 南京航空航天大学溧水仿生产业研究院有限公司 | The preparation method of aluminum oxide waterproof paper |
| CN110047656A (en) * | 2019-04-16 | 2019-07-23 | 益阳市开元电子有限公司 | Middle jewelling electrolytic capacitor low-leakage current Working electrolyte and preparation method thereof |
| CN112700965A (en) * | 2020-12-18 | 2021-04-23 | 肇庆市华胜电子有限公司 | Vehicle-mounted high-frequency low-capacitance-attenuation liquid aluminum electrolytic capacitor and production method thereof |
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Application publication date: 20170929 |
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