CN114496572A - Medium-voltage patch aluminum electrolytic capacitor electrolyte and preparation method thereof - Google Patents
Medium-voltage patch aluminum electrolytic capacitor electrolyte and preparation method thereof Download PDFInfo
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- CN114496572A CN114496572A CN202210043261.6A CN202210043261A CN114496572A CN 114496572 A CN114496572 A CN 114496572A CN 202210043261 A CN202210043261 A CN 202210043261A CN 114496572 A CN114496572 A CN 114496572A
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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 belongs to the technical field of electrolyte, and particularly relates to medium-voltage patch aluminum electrolytic capacitor electrolyte and a preparation method thereof. The electrolyte of the medium-voltage patch aluminum electrolytic capacitor is characterized in that: the components of the catalyst comprise ethylene glycol, ammonium pentaborate, ammonium salt, organic carboxylate (1-6DDA), phosphoric acid series, a hydrogen scavenger, xylitol and water; also disclosed is a method for preparing the same, comprising the steps of, S1: heating ethylene glycol to 140-145 ℃, and then completely dissolving ammonium pentaborate; s2: after the ammonium pentaborate is completely dissolved, cooling to 130 ℃, preserving heat for 1 hour, then adding ammonium salt and organic carboxylate (1-6DDA), and preserving heat for 1 hour at the temperature after the ammonium pentaborate is completely dissolved; s3: after heat preservation is carried out for 1 hour, the temperature is reduced to 85-95 ℃, and phosphoric acid series, a dehydrogenation agent, xylitol and ultrapure water are added and stirred uniformly; s4: and cooling to normal temperature after stirring uniformly.
Description
Technical Field
The invention belongs to the technical field of electrolyte, and particularly relates to medium-voltage patch aluminum electrolytic capacitor electrolyte and a preparation method thereof.
Background
The aluminum electrolytic capacitor is the most widely applied basic element in electronic products, and with the rapid development of scientific technology and electronic industry, the requirements for various components are further improved, and particularly, new challenges are provided for the performance requirements of the aluminum electrolytic capacitor.
The electrolyte is the core component of the aluminum electrolytic capacitor, is the actual cathode of the aluminum electrolytic capacitor, the service life, the reliability and the electrification parameters of the capacitor are all relevant, and the quality of the performance of the capacitor directly influences the quality.
The miniaturization development of the current electronic technology also puts higher requirements on the miniaturization of components, and the miniaturization of the aluminum electrolytic capacitor is mainly characterized in that the anode foil has higher specific surface capacity, so that the requirements on the performance of the electrolyte are higher, otherwise, the capacity change is large and the electric leakage is high, so that the service life of the whole device is influenced.
In addition, in recent years, the rapid development of LEDs and the optimization of chip arrangement have made higher and higher demands on the aluminum electrolytic capacitor of the output part, which has to withstand voltage and have long service life, and gradually evolve from 16V at the beginning to 160V at present, even more than 200V.
The medium-voltage aluminum electrolytic capacitor generally refers to a capacitor with withstand voltage of 120V-250V, and requires high conductivity (generally more than 4000 ms/cm) and high sparking voltage (more than 350V). While the current patents on this aspect are almost blank, the present invention addresses this issue with emphasis.
Disclosure of Invention
In view of the problems raised by the above background art, the present invention is directed to: is intended to provide.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the medium-voltage patch aluminum electrolytic capacitor electrolyte comprises the components of ethylene glycol, ammonium pentaborate, ammonium salt, organic carboxylate (1-6DDA), phosphoric acid series, a hydrogen eliminating agent, xylitol and water; the weight contents of the components are as follows:
50 to 70 percent of ethylene glycol;
1 to 3 percent of ammonium pentaborate;
10 to 15 percent of ammonium salt;
10 to 20 percent of organic carboxylate (1 to 6 DDA);
0.1 to 2 percent of phosphoric acid series;
0.1 to 3 percent of dehydrogenation agent
1 to 5 percent of xylitol;
1 to 5 percent of ultrapure water.
The invention further comprises polyvinyl alcohol, wherein the weight content of the polyvinyl alcohol is 0.1-1%.
In a preferred embodiment of the present invention, the phosphoric acid is one or more of ammonium phosphate, ammonium hypophosphite, ammonium phosphite, monobutyl phosphate.
As a preferable scheme of the invention, the dehydrogenating agent is one or a combination of two of nitroanisole, p-nitroacetophenone, p-nitrophenol and o-nitroanisole.
In a preferred embodiment of the present invention, the ammonium salt is one or a combination of ammonium benzoate and ammonium sebacate.
The preparation method of the medium-voltage patch aluminum electrolytic capacitor electrolyte comprises the following steps,
s1: heating ethylene glycol to 140-145 ℃, and then completely dissolving ammonium pentaborate;
s2: after the ammonium pentaborate is completely dissolved, cooling to 130 ℃, preserving heat for 1 hour, then adding ammonium salt and organic carboxylate (1-6DDA), and preserving heat for 1 hour at the temperature after the ammonium pentaborate is completely dissolved;
s3: after heat preservation is carried out for 1 hour, the temperature is reduced to 85-95 ℃, and phosphoric acid series, a dehydrogenation agent, xylitol and ultrapure water are added and stirred uniformly;
s4: and cooling to normal temperature after stirring uniformly.
The invention has the beneficial effects that:
1. higher conductivity; in order to prepare the medium-voltage electrolyte with low impedance and high ripple resistance, the electrolyte has to have higher conductivity, wherein the conductivity of the electrolyte is more than 3.5x10-3 s/m.
2. High sparking voltage; in order to ensure the working voltage of the medium-voltage aluminum electrolytic capacitor, the working electrolyte flashover voltage needs to have a certain margin value, so the medium-voltage flashover must be more than 300V.
3. High oxidation rate; in order to achieve a high oxidation efficiency of the electrolyte, the damaged dielectric oxide layer is restored as quickly as possible. If the oxidation efficiency of the electrolyte is not high, the high-temperature load service life of the product is shortened, the voltage is slowly increased or cannot be increased in the aging process, the working efficiency is influenced, the product also generates heat quickly, the voltage falls back, and the current rises back.
4. Low saturated vapor pressure; the saturated vapor pressure of the electrolyte in medium-high pressure operation must be very low to prevent the electrolyte from evaporating and escaping at high temperature, so that the service life of the capacitor can be prolonged.
5. The oxidability is stable; the service life of the working electrolyte must ensure that 105 ℃ in the circuit reaches more than 10000 h.
6. The electrolyte is non-toxic or low-toxic; because the national requirements on environmental protection and the quality of the product directly influence the service life and safety of the product, the development of the green and environment-friendly electrolyte with high cost performance is an important link of the aluminum electrolytic capacitor, so the electrolyte developed by the company is a new product researched and developed on the basis of the green environmental protection.
7. The reflow soldering quality at 260 ℃ ensures the aluminum electrolytic chip capacitor without quality problems.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following embodiments are provided to further illustrate the present invention.
Example 1
S1: weighing the product according to the formula for later use; heating ethylene glycol to 140-145 ℃, and then completely dissolving ammonium pentaborate;
s2: after the ammonium pentaborate is completely dissolved, cooling to 130 ℃, preserving heat for 1 hour, then adding ammonium benzoate and organic carboxylate (1-6DDA), and preserving heat for 1 hour at the temperature after the ammonium pentaborate is completely dissolved;
s3: after preserving heat for 1 hour, cooling to 85-95 ℃, adding ammonium hypophosphite, p-nitroacetophenone, o-nitroanisole, xylitol and ultrapure water, and uniformly stirring;
s4: and cooling to normal temperature after stirring uniformly.
Example 2
S1: weighing the product according to the formula for later use; heating ethylene glycol to 140-145 ℃, and then completely dissolving ammonium pentaborate;
s2: after the ammonium pentaborate is completely dissolved, cooling to 130 ℃, preserving the temperature for 1 hour, then adding ammonium benzoate, ammonium sebacate and organic carboxylate (1-6DDA), and preserving the temperature for 1 hour after the ammonium pentaborate is completely dissolved;
s3: after heat preservation is carried out for 1 hour, the temperature is reduced to 85-95 ℃, and ammonium hypophosphite, p-nitroacetophenone, o-nitroanisole, xylitol and ultrapure water are added and stirred uniformly;
s4: and cooling to normal temperature after stirring uniformly.
Example 3
S1: weighing the product according to the formula for later use; heating ethylene glycol to 140-145 ℃, adding polyvinyl alcohol and ammonium pentaborate, and completely dissolving;
s2: after the ammonium pentaborate is completely dissolved, cooling to 130 ℃, preserving the temperature for 1 hour, then adding ammonium benzoate, ammonium sebacate and organic carboxylate (1-6DDA), and preserving the temperature for 1 hour after the ammonium pentaborate is completely dissolved;
s3: after heat preservation is carried out for 1 hour, the temperature is reduced to 85-95 ℃, and ammonium hypophosphite, p-nitroacetophenone, o-nitroanisole, xylitol and ultrapure water are added and stirred uniformly;
s4: and cooling to normal temperature after stirring uniformly.
The examples 1 to 1 were examined according to the following parameters,
the high temperature load test results obtained were as follows:
according to the comparison and analysis of the formula parameters and the test data, the formula 3 is comprehensively considered as the best result. The special requirements of high electric conductivity and long service life for the use of customers are met.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. Medium voltage paster aluminium electrolytic capacitor electrolyte, its characterized in that: the components of the catalyst comprise ethylene glycol, ammonium pentaborate, ammonium salt, organic carboxylate (1-6DDA), phosphoric acid series, a hydrogen scavenger, xylitol and water; the weight contents of the components are as follows:
50 to 70 percent of ethylene glycol;
1 to 3 percent of ammonium pentaborate;
10 to 15 percent of ammonium salt;
10 to 20 percent of organic carboxylate (1 to 6 DDA);
0.1 to 2 percent of phosphoric acid series;
0.1 to 3 percent of dehydrogenation agent
1 to 5 percent of xylitol;
1 to 5 percent of ultrapure water.
2. The medium voltage patch aluminum electrolytic capacitor electrolyte of claim 1, wherein: the polyvinyl alcohol-based coating also comprises 0.1-1 wt% of polyvinyl alcohol.
3. The medium voltage patch aluminum electrolytic capacitor electrolyte of claim 2, wherein: the phosphoric acid is one or a combination of more of ammonium phosphate, ammonium hypophosphite, ammonium phosphite and monobutyl phosphate.
4. The medium voltage patch aluminum electrolytic capacitor electrolyte of claim 2, wherein: the hydrogen eliminating agent is one or two of nitro-benzyl alcohol, p-nitroacetophenone, p-nitrophenol and o-nitroanisole.
5. The medium voltage patch aluminum electrolytic capacitor electrolyte of claim 2, wherein: the ammonium salt is one or the combination of ammonium benzoate and ammonium sebacate.
6. The method for preparing the electrolyte of the medium-voltage patch aluminum electrolytic capacitor as claimed in any one of claims 1 to 5, characterized in that: comprises the following steps of (a) carrying out,
s1: heating ethylene glycol to 140-145 ℃, and then completely dissolving ammonium pentaborate;
s2: after the ammonium pentaborate is completely dissolved, cooling to 130 ℃, preserving heat for 1 hour, then adding ammonium salt and organic carboxylate (1-6DDA), and preserving heat for 1 hour at the temperature after the ammonium pentaborate is completely dissolved;
s3: after heat preservation is carried out for 1 hour, the temperature is reduced to 85-95 ℃, and phosphoric acid series, a dehydrogenation agent, xylitol and ultrapure water are added and stirred uniformly;
s4: and cooling to normal temperature after stirring uniformly.
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| CN202210043261.6A CN114496572A (en) | 2022-01-14 | 2022-01-14 | Medium-voltage patch aluminum electrolytic capacitor electrolyte and preparation method thereof |
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| CN202210043261.6A CN114496572A (en) | 2022-01-14 | 2022-01-14 | Medium-voltage patch aluminum electrolytic capacitor electrolyte and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040262566A1 (en) * | 2003-06-26 | 2004-12-30 | Ryoko Takaoka | Driving electrolyte and electrolytic capacitor using the same |
| CN105244165A (en) * | 2015-08-27 | 2016-01-13 | 广东风华高新科技股份有限公司 | Chip type high-voltage aluminum electrolytic capacitor, electrolyte thereof and preparation method of electrolyte |
| 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 |
| CN111584239A (en) * | 2020-06-09 | 2020-08-25 | 贵州云睿电子科技有限公司 | Electrolyte of medium-voltage aluminum electrolytic capacitor |
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- 2022-01-14 CN CN202210043261.6A patent/CN114496572A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040262566A1 (en) * | 2003-06-26 | 2004-12-30 | Ryoko Takaoka | Driving electrolyte and electrolytic capacitor using the same |
| CN105244165A (en) * | 2015-08-27 | 2016-01-13 | 广东风华高新科技股份有限公司 | Chip type high-voltage aluminum electrolytic capacitor, electrolyte thereof and preparation method of electrolyte |
| 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 |
| CN111584239A (en) * | 2020-06-09 | 2020-08-25 | 贵州云睿电子科技有限公司 | Electrolyte of medium-voltage aluminum electrolytic capacitor |
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