CN2879375Y - Electrode structure for metalied safety film capacitor - Google Patents
Electrode structure for metalied safety film capacitor Download PDFInfo
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- CN2879375Y CN2879375Y CN 200620102322 CN200620102322U CN2879375Y CN 2879375 Y CN2879375 Y CN 2879375Y CN 200620102322 CN200620102322 CN 200620102322 CN 200620102322 U CN200620102322 U CN 200620102322U CN 2879375 Y CN2879375 Y CN 2879375Y
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Abstract
The utility model relates to a electrode structure of metallized safe film capacitor, including a upper film layer and a lower film layer stack-up closely, the upper film layer and the lower film layer made separatedly as metallized safe film and metallized film, or metallized safe film and metallized film assembly, dividing horizontally metallized safe film and metallized film into several electrode areas separatedly by vertical blank isolation belts, staggered setting isolation belts, a tandem structure for forming capacitor, numbers of electrode area equal to that of tandem unit. By adopting tandem partial pressure principle, the utility model can decline interelectrode working voltage of each tandem unit in capacitor to lower than highest allowance self-discharge pick voltage which capacitor manufacture technology can access, repress or reduce corrosion function of residual gas brush discharge for safe film in capacitor, explosion proof safely, prolong working life, reduce loss of electrode effective working area, decrease difficulty of manufacture technology.
Description
Technical field:
The utility model relates to electronic component, particularly the improvement of capacitor electrode film structure.
Technical background
In the prior art, metal metallized safety film is that the layer electrodes by membrane surface is divided into the composite membrane that conducting bridge constituted that the safety fuse effect is arranged between many junior units, junior unit with clearance groove, and metalized film is the composite membrane that is made of membrane surface tight layer electrodes.Existing a kind of with the stacked coiling formation of double level metallization safety diaphragm capacitor.Because the bin area is minimum and the effect of protection system, so can carry out thousands of self-healing capacitor short-circuit does not take place, can improve the security reliability and the working life of capacitor greatly.The defective one of its existence is to use two safety diaphragms can't accomplish that when reeling the void pattern of two-layer safety diaphragm is correctly aimed at and always irregular mutually up and down, and its loss to the effective work area of electrode is bigger; The 2nd, the real work life-span of safety film capacitor is subjected to the influence of the local corona discharge of residual gas in its body; the atomic thin safety protection structure of metal metallized safety film is unable to undergo the erosion of the ionized gas of this corona discharge; clearance groove can be widened very soon; cross structure is etched very soon and narrows down and rupture; the capacitor volume loss is very fast; working life reduces, even is lower than the common metal capacitor.Suppress so on technology, take measures and remove residual gas in the capacitor, comprise tight coiling, heat treatment, vacuum oil immersion or wax, sealing etc., but all these measures can not be removed the residual gas in the capacitor all fully.If can improve the partial discharge inception voltage in the capacitor relatively; as long as this starting voltage surpasses the fluctuation and the peak-peak of operating voltage; just can suppress and reduce of the corrosion function of residual gas corona discharge to safety diaphragm explosive-proof protector structure; reach the purpose of safety anti-explosive and prolongation working life; yet bring up to the starting voltage of the partial discharge of capacitor more than the 500Vac, technology difficulty is quite high.
Summary of the invention
The purpose of this utility model is to provide a kind of safety anti-explosive, prolongs working life, reduces the electrode structure that the metal metallized safety film film capacitor of manufacturing process difficulty was lost, reduced to the effective work area of electrode.
The electrode structure of the utility model metallized safety film capacitor, last rete, down rete is closely connected stacked, it is characterized in that rete, following rete respectively are made of metal metallized safety film or metalized film, or combination and the correspondence of making metal metallized safety film and metalized film respectively are stacked, by two vertical blank isolation strip respectively last rete, down rete is divided into a plurality of by metal metallized safety film and metalized film electrode subregion one to one in the horizontal, isolation strip and isolation strip dislocation make, constitute the cascaded structure of electric capacity, the electrode number of partitions equates with the serial connection unit number.
Electrode layer in each electrode subregion of metal metallized safety film is divided into many electrode junior units by grid-shaped space line, is communicated with by the conducting bridge that can be blown by the self-healing electric current between the adjacent junior unit.
When the serial connection unit number is even number, metal metallized safety film concentrates on the rete, metalized film concentrates on down on the rete, the both lateral sides edge of metal metallized safety film is shaped on the conduction thickening sideband that is connected with the power supply container metal spraying of electrode junior unit connection, and the both lateral sides edge of metalized film respectively is shaped on and stays the limit.
When the serial connection unit number for by even number partly add 1 constituted odd number the time, the even number part of last rete is identical with above-mentioned even number series connection structure, add 1 electrode subregion and then make the metalized film that becomes to have to stay the limit, the even number part of following rete is identical with above-mentioned even number series connection structure, and the relative 1 electrode subregion that adds makes the metal metallized safety film that becomes to have conduction thickening sideband.
Each electrode subregion one side of above-mentioned metal metallized safety film is vertical blank isolation strip, as and the different subregion of current potential between insulation isolate; Opposite side is the vertical isolated interstice band that places between the identical electrode subregion of current potential, is distributed with many transverse conductance bridges that play the fuse effect on it, and the idiostatic electrode junior unit that its both sides is belonged to different subregions couples together.
In each subregion of metal metallized safety film on the grid-shaped basic pattern of electrode layer, make a lateral isolation clearance groove every a segment length, this groove and vertical blank isolation strip and vertical isolated interstice band be crossing respectively to become the T font.
The vertical blank isolation strip width of above-mentioned metal metallized safety film is the 1.5-2 that stays the hem width degree a times of metalized film, and vertically the width of isolated interstice band is the 0.3-0.6 that metalized film stays the hem width degree.
It is that basement membrane evaporation zinc/aluminum metal constitutes the combination electrode layer that above-mentioned metal metallized safety film and metalized film all adopt biaxial stretching polyester or polypropylene media film.
The principle of the utility model utilization serial connection dividing potential drop; the interpolar operating voltage of serial connection unit in each of high-voltage capacitor is dropped to below the highest permission partial discharge inception voltage (500Vac) that capacitor manufacturing process can reach; suppress and reduce residual gas corona discharge in the capacitor, make the safety diaphragm protection system in middle and high piezoelectricity container, can normally send out the brightness effect the corrosion function of safety diaphragm explosive-proof protector structure.The utility model also has very large practical value for low pressure connection compensation condenser and the alternating current machine capacitor of 400Vac-500Vac.Because utilize the principle of serial connection dividing potential drop, even can drop to the interpolar operating voltage of serial connection unit in each of capacitor below the 350V.According to " Pan Shen Paschen curve " that the Theoretical Calculation that produces the required voltage across poles of gas ionization in the air-gap between two plate electrodes is drawn, this curve has a minimum valley point, and 350V is the minimum extreme value of gas ionization discharge required voltage between pole plate.If also be that capacitor element interpolar operating voltage is lower than this value; just can not produce gas ionization discharge in the capacitor; this will guarantee that the explosive-proof protector system of safety diaphragm high-voltage capacitor is not subjected to the erosion of ionized gas, improve security reliability greatly and prolong working life.According to present polypropylene media thin film technique, thickness can reach below the 3.5 μ m, make this design configurations very large practical value will be arranged for low pressure parallel capacitor and the alternating current machine capacitor of 400Vac-500Vac, for example: use 3.5 μ m metallized polypropylenes, 2 serial connection safety diaphragms, capacitor maximum amount fixed working voltage 500Vac, unit interpolar operating voltage 250Vac is equivalent to 350Vdc, and medium work field intensity reaches 71.4Vac/ μ m or 100Vdc.Owing to the solution of local corona discharge problem, greatly reduce the difficulty of capacitor manufacturing process.
Description of drawings
Fig. 1 is the front view of rete four serial connection electrode subregions on the utility model embodiment.
Fig. 2 is the front view of rete four serial connection electrode subregions under the utility model embodiment.
Fig. 3 is the cross section enlarged diagram of Fig. 1 and the stacked state of Fig. 2.
Fig. 4 is the front view of rete three serial connection electrode subregions on another embodiment of the utility model.
Fig. 5 is the front view of rete three serial connection electrode subregions under another embodiment of the utility model.
Fig. 6 is the cross section enlarged diagram of Fig. 4 and the stacked state of Fig. 5.
Embodiment
Embodiment 1: relate to metal metallized safety film 1 is connected in series electrode capacitor with the inside even number that 2 pairings of common metal film roll electrode structure, last rete be metal metallized safety film 1 as an electrode, and reel closely connected stacked with following rete metalized film 2 pairing as another electrode.Respectively metal metallized safety film 1 and metalized film 2 are divided into 4 electrode subregion A, B, C, D in the horizontal by the vertical blank isolation strip 2.3 on vertical blank isolation strip 1.3 and the metalized film 2, isolated interstice band 1.5 is inserted in the B that current potential is identical on safety diaphragm 1, C electrode by stages.Isolation strip 1.3, isolated interstice band 1.5 and isolation strip 2.3 equidistant dislocation make, and constitute 4 cascaded structures of electric capacity.Be distributed with many transverse conductance bridges 1.4 that play the fuse effect on the isolated interstice band 1.5, the idiostatic electrode junior unit 1.2 that its both sides is belonged to different subregions couples together, and has increased total fuse of internal electrode subregion on the idiostatic connecting line that is equivalent to draw in the front and back of each serial connection capacitor unit.Electrode layer in each electrode subregion of metal metallized safety film 1 is divided into many electrode junior units 1.2 by grid-shaped space line 1.7, is communicated with by the conducting bridge 1.8 that can be blown by the self-healing electric current between the adjacent junior unit.When the serial connection number of electrode structure was even number, metal metallized safety film 1, total fuse conducting bridge 1.5, the conduction sideband 1.1 that contacts with metal spraying all concentrated on the rete, and metalized film 2 and Liu Bian 2.1 concentrate on down on the rete.The both lateral sides edge of metal metallized safety film 1 is shaped on the conduction thickening sideband 1.1 that is connected with the power supply container metal spraying of electrode junior unit 1.2 connections, and the both lateral sides edge of metalized film 2 respectively is shaped on and stays limit 2.1.What the kind electrode structure can guarantee to be connected with extraneous metal spraying at the outermost cellular zone is safe film electrode all, and has had the protection of isolation strip, conducting bridge space of the effect of total fuse.Because the effect of the total fuse of these internal electrode subregions; increased between the electrode junior unit and insulation blocking and security performance between electrode junior unit and additional power source; because in the work effective area district of each electrode junior unit 1.2 with two opposite polarity electrodes of its formation electric capacity in; it is just passable only to need wherein a utmost point to have bin to cut apart with little shape fuse cross structure protection according to reason; the electrical equipment of erect image two contact outlet is as a resolute line just can the work of cut-off current stop, and this total fuse effect of isolating fully with power supply is realized by the isolated interstice band 1.5 with conducting bridge 1.4 in the utility model.Owing to insert the isolated interstice band 1.5 of bonding pad between idiostatic unit is corresponding mutually with the vertical blank isolation strip 2.3 of pairing metalized film 2; its position is outside the electrode effective area; so when increasing the security performance of insulation blocking, can not increase the loss late of these clearance grooves to the active electrode area.Opposite because its effect makes the loss late in the space, electrode junior unit interval in the effective work area of electrode be reduced to 4-8% from 8-16%, also reduced the manufacturing cost of capacitor simultaneously.
Embodiment 2: closely connected stacked last rete, the combination that following rete is made metal metallized safety film and metalized film respectively, metal metallized safety film 1 and metalized film 2 in last rete, the following rete are corresponding one by one.When the serial connection unit number for by even number partly add 1 constituted odd number the time, electrode structural designs is the even number part and adds 1 cell mesh, as 3=2+1, the even number part of last rete is identical with the last rete of above-mentioned even number series connection structure, just make into metalized film 2 adding 1 electrode subregion, its outermost has the limit of staying 2.1; The even number part of following rete is identical with the following rete of above-mentioned even number series connection structure, the relative 1 electrode subregion that adds makes into metal metallized safety film 1, its outermost has conduction thickening sideband 1.1, and what the kind electrode structure can guarantee to be connected with extraneous metal spraying at the outermost cellular zone all is safe film electrode.
Metal metallized safety film of the present utility model 1 as basic pattern, makes every bin area very little with network, has only hundreds of thousands/one of the total electrode area of capacitor, thereby reduced each self-healing capacitor volume is lost.On this basic pattern, every a segment length lateral isolation clearance groove 1.6 is set in addition, this groove and vertical blank isolation strip 1.3 are intersected with vertical isolated interstice band 1.5 and are respectively become the T font, as Fig. 1, shown in Figure 4.This groove takes place after part blows at total fuse, vertically the flowing of electric current in effective area under it capable of blocking, in order to avoid increase current loading and the climing court of a feudal ruler property damage that total fuse between adjacent region and metal spraying connect, and restrain the loss heating of longitudinal current.This vertical climing court of a feudal ruler property damage is a common phenomena in metallization film capacitor, generally speaking, the outer residual gas of capacitor is more, so outer field self-healing is more and the self-healing hickie is bigger, the metal spraying connection is vulnerable to the erosion of corona discharge and begins to damage, the metal spraying of the effect inside by longitudinal current connects climing court of a feudal ruler property damage then, the loss of capacitor is increased, heating, distortion bulge and puncture.There is certain blocking effect in the grid space of metal metallized safety film 1 to longitudinal current the sixth of the twelve Earthly Branches, but because its grid angle at 45 is undesirable to the vertical blocking-up of the bigger film of width, has increased lateral isolation clearance groove 1.6, can remedy the defective of network.
Another distinct advantages of the present utility model is to be blown to isolate with the open circuit of space grid by the microfuze of metal metallized safety film 1 to shield when losing efficacy; so the serial connection capacitor end high voltage after losing efficacy will be assigned on each electrode subregion space grid; the series connection breaker protection that need use in the time of can not losing efficacy as the short circuit of common series capacitor; very high capacitor total voltage will be concentrated on the fracture of this breaker protector, the separation that makes the circuit breaker electric contact owing to arcing, restrike and phenomenon such as the overvoltage difficulty that becomes.And the Electric Field Distribution that the utility model needs only according to the isolated interstice band present position of each electrode subregion after the capacitor open-circuit inefficacy designs its width, just can reach reliable isolation.Inner vertical blank isolation strip 1.3 width be metalized film 2 stay limit 2.1 width 1.5-2 doubly, the width that has the isolated interstice band 1.5 of many transverse conductance bridges 1.4 be metalized film stay limit 2.1 width about 1/2.For example calculate according to capacitor design to 1000-1500Vac, the width that stays limit 2.1 at extraction electrode place is 3.5-5mm, vertical blank isolation strip 2.3 width on inner vertical blank isolation strip 1.3 and the metalized film 2 are 4-6mm, and isolation strip 1.5 width with conducting bridge 1.4 are 1.5-2.5mm.The energy that the safeguard protection that conducting bridge 1.4 width then can bear according to thin film dielectrics fuses (experiment value is little joule of 20-100) design is about 0.5-2.5mm.In the present embodiment 1, metal metallized safety film 1 is wide: 150mm; Metalized film 2 wide 147.5mm, retraction amount in both sides is 1.25mm respectively, becomes the poor limit of wound capacitor element.The medium 1.0 of capacitor and 2.0 uses bidirectional stretching polypropylene film, and thickness: 3.8 μ m, evaporation metal are that zinc-aluminium is compound, edge thickening conduction sideband 1.1 surperficial square resistance≤4 Ω/, and bin 1.2 service areas are 7.5 Ω/.The duplicature of this 4 concatenation type pattern electrode structure reeled on the ABS plastic plug make capacitor semi-finished product element.To this semi-finished product element heat-treat, metal spraying, electric weakness are removed and are handled, drive that tide is handled, dress shell, encapsulated epoxy resin, making the cell capacitance amount is that 50 μ F, every capacitor total capacitance are that 12.5 μ F, rated operational voltage are the high-voltage capacitor finished product element of 1000Vac.This capacitor is added 1250Vac, and under the medium work field intensity 82/ μ m, capacitive power is 5KVA; Under 85 ℃ of temperature environments, after the work in 3000 hours, none inefficacy, volume change is less than 3%, and is satisfactory.
Claims (7)
1, the electrode structure of metallized safety film capacitor, last rete, following rete is closely connected stacked, it is characterized in that rete, each is made of following rete metal metallized safety film (1) or metalized film (2), or combination and the correspondence of making metal metallized safety film (1) and metalized film (2) respectively are stacked, by vertical blank isolation strip (1.3) and (2.3) respectively last rete, following rete is divided into a plurality of by metal metallized safety film (1) and metalized film (2) electrode subregion one to one in the horizontal, isolation strip (1.3) and isolation strip (2.3) dislocation make and the cascaded structure of formation electric capacity, and the electrode number of partitions equates with the serial connection unit number.
2. the electrode structure of metallized safety film capacitor according to claim 1, it is characterized in that the electrode layer in each electrode subregion of metal metallized safety film (1) is divided into many electrode junior units (1.2) by grid-shaped space line (1.7), between the adjacent junior unit by being communicated with by the conducting bridge (1.8) that the self-healing electric current blows.
3. the electrode structure of metallized safety film capacitor according to claim 2, it is characterized in that when the serial connection unit number is even number, metal metallized safety film (1) concentrates on the rete, metalized film (2) concentrates on down on the rete, the both lateral sides edge of metal metallized safety film (1) is shaped on the conduction thickening sideband (1.1) that is connected with the power supply container metal spraying of electrode junior unit (1.2) connection, and the both lateral sides edge of metalized film (2) respectively is shaped on and stays limit (2.1); When the serial connection unit number for by even number partly add 1 constituted odd number the time, the even number part of last rete is identical with above-mentioned even number series connection structure, add 1 electrode subregion and then make the metalized film (2) that becomes to have to stay limit (2.1), the even number part of following rete is identical with above-mentioned even number series connection structure, and the relative 1 electrode subregion that adds makes the metal metallized safety film (1) that becomes to have conduction thickening sideband (1.1).
4. the electrode structure of metallized safety film capacitor according to claim 3 is characterized in that each electrode subregion one side of metal metallized safety film (1) is vertical blank isolation strip (1.3), as and the different subregion of current potential between insulation isolate; Opposite side is the vertical isolated interstice band (1.5) that places between the identical electrode subregion of current potential, is distributed with many transverse conductance bridges (1.4) that play the fuse effect on it, and the idiostatic electrode junior unit (1.2) that makes both sides belong to different subregions connects.
5, the electrode structure of metallized safety film capacitor according to claim 3, it is characterized in that on the grid-shaped basic pattern of electrode layer in each subregion of metal metallized safety film (1), make a lateral isolation clearance groove (1.6) every a segment length, this groove and vertical blank isolation strip (1.3) and vertical isolated interstice band (1.5) intersect the T font.
6, the electrode structure of metallized safety film capacitor according to claim 3, vertical blank isolation strip (1.3) width that it is characterized in that metal metallized safety film (1) is the 1.5-2 that stays limit (2.1) width a times of metalized film (2), and vertically the width of isolated interstice band (1.5) is the 0.3-0.6 that metalized film stays limit (2.1) width.
7. according to the electrode structure of the described arbitrary metallized safety film capacitor of claim 1-6, it is characterized in that it is that basement membrane evaporation zinc/aluminum metal constitutes combination electrode layer, polypropylene media film thickness 2.8-8 μ m that metal metallized safety film (1) and metalized film (2) all adopt biaxial stretching polyester or polypropylene media film.
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| CN 200620102322 CN2879375Y (en) | 2006-04-04 | 2006-04-04 | Electrode structure for metalied safety film capacitor |
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| CN 200620102322 CN2879375Y (en) | 2006-04-04 | 2006-04-04 | Electrode structure for metalied safety film capacitor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866744A (en) * | 2010-05-26 | 2010-10-20 | 浙江南洋科技股份有限公司 | Vertically-partitioned metallized grid safe film electrode structure |
| CN103065795A (en) * | 2013-01-30 | 2013-04-24 | 慈溪市日益电容器厂 | Explosion-proof series capacitor internally connected with inductors in series |
| CN103839675A (en) * | 2014-03-12 | 2014-06-04 | 浙江七星电容器有限公司 | Metallic film capacitor |
| CN104701014A (en) * | 2013-12-09 | 2015-06-10 | 小岛冲压工业株式会社 | Metallized film capacitor |
| CN104916441A (en) * | 2015-06-09 | 2015-09-16 | 长兴友畅电子有限公司 | Anti-unsoldering thin-film capacitor |
| CN107068397A (en) * | 2017-05-05 | 2017-08-18 | 无锡宏广电容器有限公司 | DC frequency-changing electric capacity |
| CN107134363A (en) * | 2017-06-28 | 2017-09-05 | 哈尔滨理工大学 | The automatic connection in series-parallel high square resistance metal metallized safety film of micro unit |
| CN108369862A (en) * | 2015-12-15 | 2018-08-03 | 松下知识产权经营株式会社 | Metalized film and thin film capacitor |
| CN110197766A (en) * | 2019-05-06 | 2019-09-03 | 珠海格力新元电子有限公司 | Thin film capacitor |
| CN111033655A (en) * | 2017-08-15 | 2020-04-17 | 王子控股株式会社 | Metallized film, metallized film roll, and printing plate cylinder |
-
2006
- 2006-04-04 CN CN 200620102322 patent/CN2879375Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866744A (en) * | 2010-05-26 | 2010-10-20 | 浙江南洋科技股份有限公司 | Vertically-partitioned metallized grid safe film electrode structure |
| CN101866744B (en) * | 2010-05-26 | 2011-08-31 | 浙江南洋科技股份有限公司 | Vertically-partitioned metallized grid safe film electrode structure |
| CN103065795A (en) * | 2013-01-30 | 2013-04-24 | 慈溪市日益电容器厂 | Explosion-proof series capacitor internally connected with inductors in series |
| CN104701014A (en) * | 2013-12-09 | 2015-06-10 | 小岛冲压工业株式会社 | Metallized film capacitor |
| CN103839675A (en) * | 2014-03-12 | 2014-06-04 | 浙江七星电容器有限公司 | Metallic film capacitor |
| CN104916441A (en) * | 2015-06-09 | 2015-09-16 | 长兴友畅电子有限公司 | Anti-unsoldering thin-film capacitor |
| CN108369862A (en) * | 2015-12-15 | 2018-08-03 | 松下知识产权经营株式会社 | Metalized film and thin film capacitor |
| CN107068397A (en) * | 2017-05-05 | 2017-08-18 | 无锡宏广电容器有限公司 | DC frequency-changing electric capacity |
| CN107134363A (en) * | 2017-06-28 | 2017-09-05 | 哈尔滨理工大学 | The automatic connection in series-parallel high square resistance metal metallized safety film of micro unit |
| CN111033655A (en) * | 2017-08-15 | 2020-04-17 | 王子控股株式会社 | Metallized film, metallized film roll, and printing plate cylinder |
| US11817272B2 (en) | 2017-08-15 | 2023-11-14 | Oji Holdings Corporation | Metallized film, metallized film roll, plate roll |
| CN110197766A (en) * | 2019-05-06 | 2019-09-03 | 珠海格力新元电子有限公司 | Thin film capacitor |
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| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG NANYANG SCIENCE CO., LTD. Free format text: FORMER NAME OR ADDRESS: ZHEJIANG NANYANG ELECTRONIC MEMBRANE CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 318000, No. 388, development road, Jiaojiang District, Zhejiang, Taizhou Patentee after: Zhejiang Nanyang Hi-Tech Co., Ltd. Address before: 318000, No. 388, development road, Jiaojiang District, Zhejiang, Taizhou Patentee before: Zhejiang Nanyang Electronic Film Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20070314 |
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| EXPY | Termination of patent right or utility model |