CN108538598B - Electrolyte of ultra-low temperature motor starting aluminum electrolytic capacitor and preparation method thereof - Google Patents
Electrolyte of ultra-low temperature motor starting aluminum electrolytic capacitor and preparation method thereof Download PDFInfo
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- CN108538598B CN108538598B CN201810697340.2A CN201810697340A CN108538598B CN 108538598 B CN108538598 B CN 108538598B CN 201810697340 A CN201810697340 A CN 201810697340A CN 108538598 B CN108538598 B CN 108538598B
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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
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- H01G9/022—Electrolytes; Absorbents
- H01G9/035—Liquid electrolytes, e.g. impregnating materials
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Abstract
The invention discloses an electrolyte of an ultra-low temperature motor starting aluminum electrolytic capacitor, which is characterized in that: comprises the following components in percentage by weight: 38-72% of ethylene glycol, 8-56% of tetrahydrofurfuryl alcohol, 0-10.5% of water, 4-8.6% of dodecanedioic acid, 2-6.3% of triethylamine, 1-5.2% of ammonium oxalate and 0.8-0.5% of a hydrogen eliminating agent. The invention can effectively solve the problems that the existing electrolyte using DMF as a main solvent can corrode most structural materials, especially sealing material rubber of an electrolytic capacitor because DMF is a highly corrosive solvent, the sealing property of the electrolytic capacitor can be damaged after long-term use, the sealing property is unacceptable for the aluminum electrolytic capacitor, and the leakage of DMF can damage the environment.
Description
Technical Field
The invention relates to an electrolyte of an aluminum electrolytic capacitor, in particular to an electrolyte of an ultra-low temperature motor starting aluminum electrolytic capacitor and a configuration method.
Background
The working temperature required by the aluminum electrolytic capacitor for starting the motor is usually-10 ℃ or-25 ℃ or above, and the moving foot print of human beings in alpine regions is more and more frequent due to the expansion of the moving range of modern human beings, so that the application of related electromechanical equipment in the alpine regions, low-pressure and ultralow-temperature environment conditions is driven, and the application of the related electromechanical equipment in the related environment conditions is limited by the common standard product, so that the development of the aluminum electrolytic capacitor for starting the motor, which can be applied in the low-pressure and ultralow-temperature environment conditions in the high-temperature regions, becomes necessary.
N.N-2 methyl formamide (DMF) is used for replacing ethylene glycol as a main solvent, so that the effective working temperature of the capacitor can be expanded to-40 ℃, because the freezing point of the DMF is-61 ℃, but the DMF is a highly corrosive solvent and can corrode most structural materials, particularly sealing material rubber of the electrolytic capacitor, the sealing performance of the electrolytic capacitor can be damaged after long-term use, the sealing performance of the electrolytic capacitor is unacceptable for the aluminum electrolytic capacitor, and meanwhile, the leakage of the DMF can damage the environment.
Disclosure of Invention
The invention aims to provide an electrolyte of an ultra-low temperature motor starting aluminum electrolytic capacitor and a configuration method thereof, which solve the problems that the sealing performance of the electrolytic capacitor is damaged after long-term use because DMF is a highly corrosive solvent and can corrode most structural materials, particularly sealing material rubber of the electrolytic capacitor, which is unacceptable for the aluminum electrolytic capacitor, and the leakage of DMF can damage the environment in the existing electrolyte using DMF as a main solvent.
The technical scheme adopted by the invention for solving the technical problems is as follows: the electrolyte of the aluminum electrolytic capacitor for the starting of the ultralow temperature motor comprises the following components in percentage by weight: 38-72% of ethylene glycol, 8-56% of tetrahydrofurfuryl alcohol, 0-10.5% of water, 4-8.6% of dodecanedioic acid, 2-6.3% of triethylamine, 1-5.2% of ammonium oxalate and 0.8-0.5% of a hydrogen eliminating agent.
A method for preparing electrolyte of an ultra-low temperature motor starting aluminum electrolytic capacitor comprises the following steps:
mixing the dodecanedioic acid and the triethylamine according to a ratio, putting the mixture into a second reaction kettle, fully stirring, covering a kettle cover of the second reaction kettle, and keeping for 3-4 hours;
step (2), firstly, putting ethylene glycol, tetrahydrofurfuryl alcohol and water into a first reaction kettle according to a ratio, fully mixing and stirring, and heating to 80-85 ℃; then putting the mixture obtained in the step (1) and the ammonium oxalate in a corresponding proportion into a first reaction kettle, fully stirring, heating to 120 +/-2 ℃, and stopping heating to obtain electrolyte;
and (3) naturally cooling the electrolyte in the step (2) for at least 8 hours, and sampling to detect the electrical parameters.
Further, the heating equipment in the step (1) is a heat-conducting oil heating tank, a first reaction kettle is arranged in the heat-conducting oil heating tank, heat-conducting oil in the heat-conducting oil heating tank is in contact with the outer side wall of the reaction kettle to heat the reaction kettle, and the ethylene glycol, the tetrahydrofurfuryl alcohol and the water are put into the first reaction kettle according to the proportion, are fully mixed and stirred and then are heated to 80-85 ℃ through the heat-conducting oil.
The invention has the beneficial effects that: through different hydrogen bonding effects of chemical structures of different solvents, a mixed (composite) solvent capable of providing sufficient solubility for a solute at the temperature of below 40 ℃ below zero is analyzed and developed; the freezing point of the composite solvent can reach below-60 ℃, the electrolyte is prepared by dissolving ammonium salt containing branched chain dicarboxylic acid in a mixed solvent consisting of ethylene glycol, water and tetrahydrofurfuryl alcohol, and the electrolyte can effectively solve the problems that the existing electrolyte using DMF as a main solvent can corrode most structural materials because DMF is a solvent with strong corrosivity, particularly can be used as sealing material rubber of an electrolytic capacitor, the sealing property of the electrolytic capacitor can be damaged after long-time use, the electrolyte is unacceptable for the aluminum electrolytic capacitor, and the environment can be damaged due to DMF leakage.
The invention will be explained in more detail below with reference to the drawings and examples.
Drawings
FIG. 1 is a graph of the resistivity-temperature characteristics of an electrolyte for an ultra-low temperature motor starting aluminum electrolytic capacitor.
FIG. 2 is a graph showing the loss-temperature characteristics of electrolyte of an ultra-low temperature motor starting aluminum electrolytic capacitor.
Detailed Description
Embodiment 1, an electrolyte for an ultra-low temperature motor starting aluminum electrolytic capacitor comprises the following components in percentage by weight: 42% of ethylene glycol, 42% of tetrahydrofurfuryl alcohol, 6% of water, 4.7% of dodecanedioic acid, 3% of triethylamine, 2% of ammonium oxalate and 0.5% of a hydrogen eliminating agent.
Embodiment 2, an electrolyte for an ultra-low temperature motor starting aluminum electrolytic capacitor comprises the following components in percentage by weight: 62 percent of ethylene glycol, 18 percent of tetrahydrofurfuryl alcohol, 10.5 percent of water, 4.3 percent of dodecanedioic acid, 3.4 percent of triethylamine, 2.0 percent of ethanedioic acid ammonium and 0.5 percent of dehydrogenation agent.
Embodiment 3, an electrolyte for an ultra-low temperature motor starting aluminum electrolytic capacitor comprises the following components in percentage by weight: 72% of ethylene glycol, 18% of tetrahydrofurfuryl alcohol, 0% of water, 6.3% of dodecanedioic acid, 4% of triethylamine, 3% of ammonium oxalate and 0.6% of a dehydrogenation agent.
Example 4: the electrolyte of the aluminum electrolytic capacitor for the starting of the ultralow temperature motor comprises the following components in percentage by weight: 38-72% of ethylene glycol, 8-56% of tetrahydrofurfuryl alcohol, 0-10.5% of water, 4-8.6% of dodecanedioic acid, 2-6.3% of triethylamine, 1-5.2% of ammonium oxalate and 0.8-0.5% of a hydrogen eliminating agent.
mixing the dodecanedioic acid and the triethylamine according to a ratio, putting the mixture into a second reaction kettle, fully stirring, covering a kettle cover of the second reaction kettle, and keeping for 3-4 hours;
step (2), firstly, putting ethylene glycol, tetrahydrofurfuryl alcohol and water into a first reaction kettle according to a ratio, fully mixing and stirring, and heating to 80-85 ℃; then putting the mixture obtained in the step (1) and the ammonium oxalate in a corresponding proportion into a first reaction kettle, fully stirring, heating to 120 +/-2 ℃, and stopping heating to obtain electrolyte;
and (3) naturally cooling the electrolyte in the step (2) for at least 8 hours, sampling, detecting electrical parameters, and respectively detecting the electrical parameters at-40 ℃, 85 ℃, 30 ℃ and 40 ℃ by sampling detection, wherein the electrical parameters at 30 ℃ are detected in summer, and the electrical parameters at 40 ℃ are detected in winter.
The heating equipment in the step (1) is a heat-conducting oil heating tank, a first reaction kettle is arranged in the heat-conducting oil heating tank, heat-conducting oil in the heat-conducting oil heating tank is in contact with the outer side wall of the reaction kettle to heat the reaction kettle, ethylene glycol, tetrahydrofurfuryl alcohol and water are put into the first reaction kettle according to the proportion, and the mixture is fully mixed and stirred and then heated to 80-85 ℃ through the heat-conducting oil.
The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.
Claims (1)
1. A method for preparing electrolyte of an ultra-low temperature motor starting aluminum electrolytic capacitor is characterized in that: the method comprises the following steps:
the method comprises the following steps of (1) preparing: 38-72% of ethylene glycol, 8-56% of tetrahydrofurfuryl alcohol, 0-10.5% of water, 4-8.6% of dodecanedioic acid, 2-6.3% of triethylamine, 1-5.2% of ammonium oxalate and 0.8-0.5% of a hydrogen eliminating agent; mixing the dodecanedioic acid and the triethylamine according to a ratio, putting the mixture into a second reaction kettle, fully stirring, covering a kettle cover of the second reaction kettle, and keeping for 3-4 hours;
step (2), firstly, putting ethylene glycol, tetrahydrofurfuryl alcohol and water into a first reaction kettle according to a ratio, fully mixing and stirring, and heating to 80-85 ℃; then putting the mixture obtained in the step (1) and the ammonium oxalate in a corresponding proportion into a first reaction kettle, fully stirring, heating to 120 +/-2 ℃, and stopping heating to obtain electrolyte;
step (3), after naturally cooling the electrolyte in the step (2) for at least 8 hours, sampling and detecting electrical parameters;
the heating equipment in the step (1) is a heat-conducting oil heating tank, a first reaction kettle is arranged in the heat-conducting oil heating tank, heat-conducting oil in the heat-conducting oil heating tank is in contact with the outer side wall of the reaction kettle to heat the reaction kettle, ethylene glycol, tetrahydrofurfuryl alcohol and water are put into the first reaction kettle according to the proportion, and the mixture is fully mixed and stirred and then heated to 80-85 ℃ through the heat-conducting oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810697340.2A CN108538598B (en) | 2018-06-29 | 2018-06-29 | Electrolyte of ultra-low temperature motor starting aluminum electrolytic capacitor and preparation method thereof |
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| CN201810697340.2A CN108538598B (en) | 2018-06-29 | 2018-06-29 | Electrolyte of ultra-low temperature motor starting aluminum electrolytic capacitor and preparation method thereof |
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| CN108538598B true CN108538598B (en) | 2020-08-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1744247A (en) * | 2004-08-30 | 2006-03-08 | 广东风华高新科技股份有限公司 | Aluminium electrolytic capacitor working electrolyte and capacitor obtained thereof |
| CN102013325A (en) * | 2010-09-22 | 2011-04-13 | 湖南省衡阳华高电子有限公司 | Electrolyte of wide-temperature long-life patch aluminium electrolytic capacitor and preparation method thereof |
| CN106449103A (en) * | 2016-08-31 | 2017-02-22 | 湖南艾华集团股份有限公司 | Dedicated electrolyte for ultralow-temperature aluminium electrolytic capacitor |
| CN107644740A (en) * | 2017-10-17 | 2018-01-30 | 深圳市金元电子技术有限公司 | 500WV stroboscopic lamps working electrolyte for aluminium electrolytic capacitor and compound method |
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2018
- 2018-06-29 CN CN201810697340.2A patent/CN108538598B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1744247A (en) * | 2004-08-30 | 2006-03-08 | 广东风华高新科技股份有限公司 | Aluminium electrolytic capacitor working electrolyte and capacitor obtained thereof |
| CN102013325A (en) * | 2010-09-22 | 2011-04-13 | 湖南省衡阳华高电子有限公司 | Electrolyte of wide-temperature long-life patch aluminium electrolytic capacitor and preparation method thereof |
| CN106449103A (en) * | 2016-08-31 | 2017-02-22 | 湖南艾华集团股份有限公司 | Dedicated electrolyte for ultralow-temperature aluminium electrolytic capacitor |
| CN107644740A (en) * | 2017-10-17 | 2018-01-30 | 深圳市金元电子技术有限公司 | 500WV stroboscopic lamps working electrolyte for aluminium electrolytic capacitor and compound method |
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