CN102237203B - High-power and high-frequency pulse ageing instrument and ageing method for middle- and high-pressure aluminum electrolytic capacitor - Google Patents
High-power and high-frequency pulse ageing instrument and ageing method for middle- and high-pressure aluminum electrolytic capacitor Download PDFInfo
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- CN102237203B CN102237203B CN 201010151338 CN201010151338A CN102237203B CN 102237203 B CN102237203 B CN 102237203B CN 201010151338 CN201010151338 CN 201010151338 CN 201010151338 A CN201010151338 A CN 201010151338A CN 102237203 B CN102237203 B CN 102237203B
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Abstract
The invention relates to a high-power and high-frequency pulse ageing instrument and an ageing method for a middle- and high-pressure aluminum electrolytic capacitor. The ageing instrument comprises a micro processor module, a voltage/current controllable direct-current power supply module and a switch circuit, wherein the micro processor module outputs a control signal to control the operation of the voltage/current controllable direct-current power supply module; the voltage/current controllable direct-current power supply module operates and outputs power supply to the switch circuit; and the micro processor module controls the switch circuit to output a high-frequency pulse. The ageing method comprises the following steps of: ageing the electrolytic capacitor by outputting the high-frequency pulse with the frequency of between 1 and 10,000Hz and the duty ratio of 0.3 to 0.8; boosting an ageing voltage to a set output voltage by steps at room temperature and ageing the aluminum electrolytic capacitor within 1.5 to 2.5 hours; ageing the aluminum electrolytic capacitor for 1.0 hour at the temperature of between 85 DEG C to 115 DEG C and the set output voltage; and cooling to room temperature and ageing the aluminum electrolytic capacitor for 0.5 hour at the set output voltage.
Description
Technical field
The present invention discloses a kind of seasoned appearance and method of aging of electrolytic capacitor, the seasoned appearance of particularly a kind of medium-high voltage aluminum electrolytic capacitor high-power high-frequency pulse and adopt the aging method of this seasoned appearance to medium-high voltage aluminum electrolytic capacitor.
Background technology
Electrolytic capacitor owing to cut operations such as paper tinsel, thorn riveting and coiling, to the damage that oxide-film causes that changes on the electrode aluminium foil, only depends on the self-healing ability of capacitor in manufacture process, be difficult to repair fully.Must could guarantee that performance of products reaches standard-required, and have quite stable property and homogeneity through seasoned this operation.Experienced process is one of critical process of aluminium electrolytic capacitor manufacturing; It is with certain voltage or electric current capacitor to be changed into processing again; Its effect is to repair as dielectric alumite, to reduce leakage current, guarantees that the performance and the quality of electrolytic capacitor reaches standard-required.Changing into essence is an electrolytic process, under the effect of voltage or electric current, and the Al of anode aluminium foil
3+Leave the O that generates with the water power in the electrolyte
2-Chemical combination generates oxide-film Al at anode
2O
3, and on negative electrode, separate out H simultaneously
2, oxide-film and H
2Growing amount meet Faraday's laws of electrolysis.But; In fact the power consumption of experienced process is far longer than Theoretical Calculation and goes out required electric weight, and the energising of experienced process is not effective constantly in other words, according to electrochemical analysis; Voltage when changing into mainly is applied on the oxide-film; Except that the interface, almost there is not voltage drop in the electrolyte, the concentration diffusion that ion motion mainly causes by concentration difference.Near when changing into the anode ion motion mainly contains: (1) Al
3+Get into interface and O
2-Chemical combination generates Al
2O
3Film; (2) water in the electrolyte is ionized into H
+And OH
-, OH
-Be ionized into O again
2-(provide one reaction required) and H
+(3) H
2O is ionized into O
2-The time, 2 H are arranged
+Generate; Because pH value height is decided by H+ concentration; Therefore getting pH value (＜4) near the anode will be lower, shows the acid firm generation (it is 6～8 that firm generation needs the pH value) that can influence oxide-film, must be neutralized by electrolytical anion in the electrolyte (the anion roots of adipic acid, decanedioic acid etc.).Al
3+Getting into the interface is unchallenged owing to the effect of anode potential is arranged, two back two kinds of O after changing into consumption
2-With in time replenishing of electrolyte anion, but to lean on they self concentration difference to spread and accomplish.Because the concentration difference diffusion rate is much littler than the example rate travel under electric field action, so their diffusion is the key factor that influences efficient.The aluminium electrolytic capacitor experienced process is divided into traditional continuous direct current method and impulse method.At present domesticly mostly adopt traditional continuous direct voltage (constant-voltage method) or electric current (constant flow method) that aluminium electrolytic capacitor is carried out seasoned method to aluminium electrolytic capacitor; Or take 2～3 plateau voltage methods of branch at mesohigh; Low, the weak effect of its efficient, ageing time reaches tens hours.Cause the production cycle long, equipment is many, and floor space is big, and rate of finished products is low.Use certain frequency during the seasoned method of pulse; The voltage of certain duty ratio or the unidirectional square-wave pulse of electric current substitute traditional continuous direct voltage or electric current aluminium electrolytic capacitor are carried out seasoned method, can shorten the seasoned time greatly; But; The seasoned method of pulse of the prior art all is to adopt the seasoned supply unit of pulse of square-wave voltage, between the high period of square wave, in (2～300 seconds) aluminium electrolytic capacitor is charged, and between the low period of square-wave voltage, in (0.5～3 second) aluminium electrolytic capacitor is discharged; It is seasoned to utilize its centering high-voltage capacitance to carry out, and does not still reach the positive effect that shortens the seasoned time.
Summary of the invention
To above-mentioned seasoned appearance of mentioning of traditional capacitance of the prior art and the unfavorable shortcoming of method of aging centering high-pressure electrolysis electric capacity; The present invention provides a kind of seasoned appearance and method of aging of new mesohigh alminium electrolytic condenser, and it adopts high-frequency impulse centering high-pressure aluminum electrolytic electric capacity to carry out seasoned.
The technical scheme that the present invention solves its technical problem employing is: the seasoned appearance of a kind of medium-high voltage aluminum electrolytic capacitor high-power high-frequency pulse; Seasoned appearance comprises micro treatment module, electric current and voltage controllable direct current power supply module (hereinafter to be referred as DC power supplier) and switching circuit; The work of micro treatment module output control signal control DC power supplier; DC power supplier work out-put supply is given switching circuit, micro treatment module control switch circuit output high-frequency impulse.
A kind of medium-high voltage aluminum electrolytic capacitor high-frequency impulse method of aging that adopts above-mentioned seasoned appearance to carry out; This method is 1～10000Hz for adopting seasoned appearance output frequency; Duty ratio is that 0.3～0.8 high-frequency impulse carries out seasoned to electrolytic capacitor; The aging device output voltage is 0～600V; Electric current is 0～20A, and seasoned process is: utilize 1.5～2.5 hours, at room temperature experienced voltage is boosted to the setting output voltage from 0V and carry out seasoned to aluminium electrolytic capacitor; And then under 85 ℃-115 ℃ high temperature, keep to set output voltage seasoned 1.0 hours, and then be cooled to room temperature and keep setting output voltage seasoned 0.5 hour aluminium electrolytic capacitor to aluminium electrolytic capacitor.
The technical scheme that the present invention solves its technical problem employing further comprises:
Also comprise detection module in the described seasoned appearance, detection module detects the voltage of DC power supplier output, and inputs to micro treatment module.
Also comprise input unit in the described seasoned appearance, input unit inputs to micro treatment module through coding module, also comprises display module in the described seasoned appearance, and micro treatment module output shows signal drives display module work.
Described detection module is reduced to A/D integrated circuit required voltage through resistance with supply voltage, carries out inputing to micro treatment module after the analog-to-digital conversion.
Described DC power supplier adopts three-phase voltage controlled current DC power supplier, and micro treatment module output control signal is carried out output voltage after the digital-to-analogue conversion for two D/A integrated circuits and controlled the voltage and current of DC power supplier respectively and make its work.
Described switching circuit adopts high-power switch tube IGBT, the break-make of micro treatment module control IGBT.
Also comprise IGBT tube voltage drop protection module in the described seasoned appearance, protection module is connected the IGBT two ends, detects the pressure drop of IGBT, and the result is inputed to micro treatment module.
Described seasoned appearance output frequency 5000Hz, duty ratio is 0.6.
The invention has the beneficial effects as follows: adopt the present invention because pulse current charge period electric current is bigger, higher and the setting up of period intermittently of temperature rise helps oxide-film and forms ion to the equilbrium position transition, forms deformation, the less oxide-film of defective.Utilize the present invention to carry out seasoned to the mesohigh product; Can make the seasoned time of mesohigh electrochemical capacitor shorten to 5 hours by 15 hours, shorten to common-law 1/3, and; Can make the seasoned time of high temperature from original 4 hours; Shorten to 1 hour, practiced thrift power consumption greatly, can practice thrift high pressure production cost of products 3%～5%.
To combine accompanying drawing and embodiment that the present invention is further specified below.
Description of drawings
Fig. 1 is a principle of the invention block diagram.
Fig. 2 is the detailed theory diagram of the present invention.
Fig. 3 is an output waveform schematic diagram of the present invention.
Embodiment
Present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with present embodiment or approximate with basic structure, all within protection range of the present invention.
The high-frequency impulse of indication is meant the pulse of pulse frequency more than 1Hz among the present invention.Please referring to accompanying drawing 1 and accompanying drawing 2, nucleus module of the present invention is a micro treatment module and a three-phase voltage controlled current DC power supplier.Micro treatment module is (in the present embodiment; Micro treatment module employing single-chip minimum system) the output control signal carries out inputing to three-phase voltage controlled current DC power supplier after digital-to-analogue conversion and the amplification through the D/A module respectively; The output voltage and the size of current of control three-phase voltage controlled current DC power supplier; In the present embodiment, three-phase voltage controlled current DC power supplier adopts 600V, 20A switch power module.This power module output voltage is given switching circuit; In the present embodiment; Switching circuit adopts high-power switch tube IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) to form, and micro treatment module output control signal is given the IGBT driver module; By the break-make of driver module driving IGBT, by IGBT output high-frequency pulse square wave.In the present embodiment, by the break-make frequency of micro treatment module control IGBT pipe, and the logical and disconnected time ratio of IGBT, control frequency size and duty ratio that IGBT exports pulse.The last tube voltage drop protection module that is connected with of IGBT; In the present embodiment, the tube voltage drop protection module adopts discrete component to form protective circuit, does not reach the threshold value of protective circuit through the tube voltage drop of IGBT; Judge whether overcurrent (short circuit) of IGBT, and testing result is inputed to micro treatment module.When overcurrent (short circuit), control three-phase voltage controlled current DC power supplier is stopped power supply, and damages to prevent IGBT.Be connected with keyboard on the micro treatment module, as input unit, keyboard inputs to micro treatment module after through coding module.Be connected with data latches on the micro treatment module; Be connected with LED lamp display module on the data latches; Be used for showing operating state of the present invention; Also be connected with the charactron driver module on the data latches simultaneously, charactron driver module driving LED charactron shows operating state electric current of the present invention, voltage etc.Micro treatment module produces address decoding through an address decoding module, and control data latch conducting LED lamp display module still is the LED charactron.In the present embodiment, also be connected with the RS-232 module on the micro treatment module, be used for carrying out communication with host computer.
Among the present invention; Regulate three-phase voltage controlled current DC power supplier output current and voltage by micro treatment module; The operating voltage of seasoned appearance and operating current among may command the present invention can carry out the parameter input through keyboard, set the seasoned mode of aluminium electrolytic capacitor.
Among the present invention, also comprise the setting (current constant mode or automatic boosting mode) of seasoned process, seasoned voltage and current parameter (specified experienced voltage, the maximum current of qualification), pressure rising time (under automatic boosting mode situation).At current constant mode, micro treatment module provides pulse current to aluminium electrolytic capacitor with the current-controlled dc power module that limited and the break-make of switching circuit, makes it the experienced voltage that reaches specified.At automatic boosting mode; Program in the micro treatment module is different from traditional level pressure or the seasoned pattern of constant current; According to specified experienced voltage, the maximum current of qualification, the pressure rising time set; Form the electric current and voltage control procedure, control DC power supplier and switching circuit offer the voltage and current of the corresponding pulse frequency of aluminium electrolytic capacitor, duty ratio.On reality is used, if seasoned capacitor can be no more than the maximum current (relying on capacitors count and dimensions) of qualification, then this seasoned appearance voltage of exporting to capacitor arrives specified experienced voltage with rising mode gradually.If seasoned electric current surpasses the maximum current that limits, in two stages of then seasoned appearance, at the leading portion that boosts, along with the rising of voltage, electric current strengthens gradually, up to the maximum current that limits; Changing the back segment that boosts over to is current constant mode, keeps this electric current, makes the voltage of output continue to rise to the specified experienced voltage of voltage arrival on the capacitor, changes the constant voltage mode over to.
In the whole seasoned stage; Micro treatment module is being monitored the voltage and the overcurrent (short circuit) of DC power supplier; Then control the output of DC power supplier if any short circuit, the voltage and current that makes output is zero, waits for the seasoned process that (fixing a breakdown) continued completion in 3 minutes sets.
Seasoned process of the present invention and method are 1～10000Hz (being preferably 5000Hz in the present embodiment is selected by seasoned person voluntarily) for adopting seasoned appearance output frequency; Duty ratio is that the high-frequency impulse (please referring to accompanying drawing 3) of 0.3～0.8 (being selected voluntarily to be preferably 0.6 in the present embodiment by seasoned person) carries out seasoned to electrolytic capacitor; Seasoned appearance output voltage can be set at 0～600V (setting according to concrete seasoned electrolytic capacitor), and electric current is 0～20A.Seasoned process is carried out seasoned at room temperature experienced voltage being risen to the setting output voltage by 0V earlier to aluminium electrolytic capacitor; In the present embodiment; The preferred duration of this process is 1.5～2.5 hours; Under 85 ℃-115 ℃ high temperature, keep to set output voltage then seasoned 1.0 hours, and then be cooled to room temperature and keep setting output voltage seasoned 0.5 hour aluminium electrolytic capacitor to aluminium electrolytic capacitor.The current effective value that the present invention is output as its output of high-frequency impulse waveform is:
It is seasoned that the present invention utilizes high-frequency impulse that alminium electrolytic condenser is carried out, and pulse is seasoned to be the energising heating, intermittently cools off the process that replaces each other; Heat accumulation is little; Thereby allowing to add bigger electric current, voltage, pulse is provided with the intermittently period, has improved the electrochemical reaction efficient of repairing oxide-film.In the pulse interval period, owing to repair the necessary O of oxide-film
2-And the carboxylic acid anion can in time obtain spreading additional; Could guarantee that next round pulse electrifying oxide-film efficiently repairs, simultaneously this period intermittently, the bubble that also helps in the aluminium foil corrosion micropore is overflowed outside the hole; Guarantee that electrolyte contacts with the good of oxide-film; Effectively carry out with what guarantee that oxide-film repairs, avoid or reduce invalid energising, thereby shorten the seasoned time.The pulse electrifying period, this moment, temperature was also high because curtage is bigger, had improved the speed and the efficient of repairing oxide-film.Because diffusion and the migration rate of ion in liquid or solid, temperature influence is very big, and temperature two-forty more is fast more, and the growth rate of oxide-film is decided by Al
3+And O
2-Diffusion in oxide-film and migration, O
2-Be decided by their diffusion and the migration in electrolyte with the additional speed of carboxylic acid anion, therefore, the temperature height not only helps the speed-raising of the first two, and helps bubble and from microvoid, overflow, thereby improves speed and efficient that oxide-film is repaired.
The parameter detecting of the alminium electrolytic condenser after the present invention is seasoned is tested as follows:
Table one: 105 ℃ of 1000 hours load lifes tests of the 400V aluminium electrolytic capacitor under two kinds of method of aging
Table two: 105 ℃ of 1000 hours storage lifes tests of the 400V aluminium electrolytic capacitor under two kinds of method of aging
Table three: the 105 ℃ of high-temperature current leakage contrast experiments of 400V aluminium electrolytic capacitor under two kinds of method of aging
Data in the above-mentioned table show the result of life test, and the aluminium electrolytic capacitor after seasoned back of the present invention and traditional handicraft are seasoned can both satisfy 105 ℃ of requirements.
Adopt the present invention because pulse current charge period electric current is bigger, higher and the setting up of period intermittently of temperature rise helps oxide-film and forms ion to the equilbrium position transition, forms deformation, the less oxide-film of defective.Utilize the present invention to carry out seasoned to high die pressing product; Can make the seasoned time of high-pressure electrolysis electric capacity shorten to 5 hours by 15 hours, shorten to common-law 1/3, and; Can make the seasoned time of high temperature from original 4 hours; Shorten to 1 hour, practiced thrift power consumption greatly, can practice thrift high pressure production cost of products 3%～5%.
Claims (7)
1. medium-high voltage aluminum electrolytic capacitor high-frequency impulse method of aging; It is characterized in that: it is 1～10000Hz that seasoned appearance adopts output frequency; It is seasoned that duty ratio is that 0.3～0.8 high-frequency impulse carries out electrolytic capacitor, and said seasoned appearance output voltage is 0～600V, and electric current is 0～20A; Seasoned process is: utilize 1.5～2.5 hours; At room temperature experienced voltage is boosted to from 0V and set output voltage and aluminium electrolytic capacitor is carried out seasoned, and then under 85 ℃-115 ℃ high temperature, keep setting output voltage seasoned 1.0 hours, and then be cooled to room temperature and keep the setting output voltage seasoned 0.5 hour aluminium electrolytic capacitor to aluminium electrolytic capacitor; Said seasoned appearance comprises micro treatment module, electric current and voltage controllable direct current power supply module and switching circuit; The work of micro treatment module output control signal control electric current and voltage controllable direct current power supply module, electric current and voltage controllable direct current power supply module work out-put supply is given switching circuit, micro treatment module control switch circuit output high-frequency impulse.
2. method of aging according to claim 1 is characterized in that: said seasoned appearance output frequency 5000Hz, the high-frequency impulse duty ratio is 0.6.
3. method of aging according to claim 1; It is characterized in that: described DC power supplier adopts three-phase voltage controlled current DC power supplier, and micro treatment module output control signal is carried out output voltage after the digital-to-analogue conversion for two D/A integrated circuits and controlled the voltage and current of DC power supplier respectively and make its work.
4. method of aging according to claim 1 is characterized in that: also comprise detection module in the described seasoned appearance, detection module detects the voltage of DC power supplier output, and inputs to micro treatment module.
5. method of aging according to claim 1; It is characterized in that: also comprise input unit in the described seasoned appearance; Input unit inputs to micro treatment module through coding module, also comprises display module in the described seasoned appearance, and micro treatment module output shows signal drives display module work.
6. method of aging according to claim 1 is characterized in that: described switching circuit adopts high-power switch tube IGBT, the break-make of micro treatment module control IGBT.
7. method of aging according to claim 6 is characterized in that: also comprise IGBT pressure drop protection module in the described seasoned appearance, protection module is connected the IGBT two ends, detects the pressure drop of IGBT, and the result is inputed to micro treatment module.
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| CN102510236A (en) * | 2011-12-01 | 2012-06-20 | 范卫明 | Sophisticated power supply and sophisticating method |
| CN102646514B (en) * | 2012-03-31 | 2013-05-29 | 南通一品机械电子有限公司 | Novel aging technology of mesohigh voltage aluminum electrolytic capacitor |
| CN103399238B (en) * | 2013-08-08 | 2015-08-12 | 株洲硬质合金集团有限公司 | A kind of electrochemical capacitor of adding up is energized the method for process self-healing |
| CN103646793B (en) * | 2013-11-06 | 2016-05-11 | 中国振华（集团）新云电子元器件有限责任公司 | A kind of ageing method that improves solid electrolyte Ta capacitor breakdown voltage |
| CN103969527B (en) * | 2014-04-30 | 2016-08-17 | 华中科技大学 | A kind of discharge and recharge life detecting device of high voltage ceramic capacitor |
| CN109633383B (en) * | 2018-11-15 | 2022-03-15 | 丰宾电子（深圳）有限公司 | Voltage doubling test method for aluminum electrolytic capacitor |
| CN109741942A (en) * | 2018-12-19 | 2019-05-10 | 横店集团东磁有限公司 | A kind of method of aging and its manufacturing method of aluminium electrolutic capacitor |
| CN110441672A (en) * | 2019-08-06 | 2019-11-12 | 西安太乙电子有限公司 | A kind of SoC type integrated circuit dynamic device and method |
| CN113192754A (en) * | 2021-04-23 | 2021-07-30 | 新疆众和股份有限公司 | Control method of aluminum formed foil voltage withstanding value for aluminum electrolytic capacitor |
| CN116631777B (en) * | 2023-07-26 | 2024-01-23 | 深圳市凯琦佳科技股份有限公司 | Novel aging method for aluminum electrolytic capacitor |
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|---|---|---|---|---|
| CN1085009A (en) * | 1992-09-29 | 1994-04-06 | 西安电子科技大学 | Pulse voltage aging device for aluminium electrolytic capacitor |
| CN201654151U (en) * | 2010-04-20 | 2010-11-24 | 深圳中元电子有限公司 | High-power and high-frequency pulse aging apparatus for medium- and high-voltage aluminum electrolytic capacitor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085009A (en) * | 1992-09-29 | 1994-04-06 | 西安电子科技大学 | Pulse voltage aging device for aluminium electrolytic capacitor |
| CN201654151U (en) * | 2010-04-20 | 2010-11-24 | 深圳中元电子有限公司 | High-power and high-frequency pulse aging apparatus for medium- and high-voltage aluminum electrolytic capacitor |
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