CN203013522U - Metallized safety film dry-type high-voltage power capacitor element - Google Patents
Metallized safety film dry-type high-voltage power capacitor element Download PDFInfo
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- CN203013522U CN203013522U CN 201320029091 CN201320029091U CN203013522U CN 203013522 U CN203013522 U CN 203013522U CN 201320029091 CN201320029091 CN 201320029091 CN 201320029091 U CN201320029091 U CN 201320029091U CN 203013522 U CN203013522 U CN 203013522U
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Abstract
The utility model relates to a metallized safety film dry-type high-voltage power capacitor element, which is mainly composed of a shell, a core body, and extraction electrode terminals. The core body is formed in a way that two layers of medium base films are plated with a metal electrode coating layer to form a composite film; the composite film is laminated and reeled on a core rod; the two ends of the core rod are sprayed with metal; the composite film is transversely divided into a plurality of longitudinal unit blocks by a plurality of longitudinal strips with internal blank; grid zones are arranged at the both sides of a continuous coating layer zone in each unit block; each grid zone is formed by dividing and separating the coating layer through short-gap narrow strips into longitudinally-arranged small block electrodes; one side of each small block electrode contacts with the corresponding strip with internal blank, while the opposite side of each small block electrode is communicated with the continuous coating layer zone through an exclusive-use conductive bridge in the middle of the corresponding short-gap narrow strip; and the both sides of the composite film are respectively provided with longitudinally-continued functional tapes. The dry-type high-voltage power capacitor element provided by the utility model is increased in total working voltage and capacity, improved in capacitor specific volume characteristic, economical in raw material utilization, and lowered in temperature rise.
Description
Technical field
The utility model relates to power capacitor, particularly relates to a kind of improvement of metal metallized safety film dry-type high-voltage power capacitor element.
Background technology
In the dry-type high-voltage power capacitor field, due to the local corona discharge of the metallization dry-type high-voltage electric power device element internal of traditional structure and temperature rise heat dissipation problem, the operating voltage of each element can not be too high, capacity can not be too large, thereby need to by tens or up to a hundred the independently Metallized power capacitor elements that capacity is less, voltage is lower carry out series and parallel connections, form power capacitor unit, then compose in parallel the higher jumbo high-voltage power capacitor group networking of voltage or claim high-voltage power capacitor equipment access electrical network by many unit strings.Because element is many, cause poor reliability, volume large, cause waste of material and structure complicated.External fuse melting device is all also wanted in each element and unit, to make up the problem of metalized film " self-healing " poor reliability of making this power capacitor unit.And due to the external conductive coating of metalized film as thin as a wafer, fragile with the connection of gilding layer, cause the dry-type high-voltage power capacitor work of prior art and life-span not as good as traditional oil-immersed type power capacitor.
The validity of utilizing the metal metallized safety membrane technology to improve electric weakness self-healing is known.it is the metallic electrode coating on thin film dielectrics evaporation, be separated into various fritter electrode units with very narrow space lattice, the small coating fillet that the fuse effect has been arranged between each fritter and surrounding adjacent isles, on the film of this structure during if any electric weak point breakdown, the disruptive discharge electric current can blow the coating fillet that the small electrode piece at this place connects outward, breakdown current is extinguished, junior unit capacitor and integral capacitor device with breakdown point are cut off, reach self-healing, though and the integral capacitor device has lost the small electric capacity that is isolated junior unit, but can work by maintenance, thereby make capacitor improve operating voltage and useful life
But there are some significant deficiency in the mesh type metal safety diaphragm of prior art: due to it each fritter and the surrounding adjacent isles between play the small coating fillet of fuse effect, have certain resistance, working alternating current through out-of-date can heating; And greatly the part fritter can not be directly with to add webbing adjacent, their electric current need to pass through multiple other fritter and the coating fillet after could arrive and add webbing, be aggregated into external electrode.Because the coating fillet of each fritter is different apart from the position that adds webbing, the superposition electric current that it flows through is different, the most close adding on the small coating fillet that webbing plays the fuse effect, flow through larger superposition electric current, the electric current of this superposition produces larger additional heating loss, the dielectric withstanding voltage at this place is reduced, even cause voltage breakdown.So; each fritter of original mesh type metal safety diaphragm is due to the small coating fillet that does not independently play the fuse effect; between fritter electric current gang up, superposition; often can produce related property punctures; the reliability of safeguard protection is relatively poor; the product made from it not but still need external safety guard does not reduce life of product even on the contrary.
To this problem, also there were in recent years some to improve design, as the vertically-partitioned metallized grid safe film electrode structure that Chinese patent ZL201010183371.X addresses, make between each small electrode piece of safety diaphragm directly not to be connected; But the operating current of its very big partial electrode fritter still need gather to be superimposed to flow to after adjacent area again and adds webbing, thereby has increased the current density of adjacent area and the gross calorific power of nearly a times.When making jumbo high-voltage power capacitor unit and need with the larger metal metallized safety film of width, problem of its additional heating is more serious and can not allow.
Combine it, the metallized grid type safety diaphragm of prior art is difficult to adapt to the jumbo high-voltage power capacitor of making at present.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of metal metallized safety film dry-type high-voltage power capacitor element of aggregation type is provided, the operating voltage of dry-type high-voltage power capacitor element is significantly improved, and each element and unit do not need external fuse melting device, safe and reliable, simplified structure improves the specific volume characteristic.
The technical scheme that the utility model adopts is:
a kind of metal metallized safety film dry-type high-voltage power capacitor element, mainly by housing, core body, electrode terminal forms, core body is by the upper stacked plug that is wound on of composite membrane that plating zinc/the aluminum metal layer electrodes consists of of two layers of polypropylene medium basement membrane J, the formed cylinder of two ends metal spraying, between housing and core body by the insulating resin embedding, it is characterized in that this composite membrane is divided into several vertical blocks of cells in the horizontal by some informal vouchers of leaving a blank in longitudinally, the both sides in the continuous coating district in each blocks of cells are grid regions, each grid regions is cut the blockage electrode that isolation forms a row longitudinal arrangement to coating by short space fillet and is consisted of, one side of each blockage electrode with in the informal voucher adjacency of leaving a blank, relative opposite side is communicated with continuous coating district by the private conducting bridge that is arranged on short space fillet middle part, continuous function band on the dual-side of composite membrane is shaped with respectively vertically.
Described function band is for staying limit or the coated webbing that adds without coating.
Described housing, plug are made by plastics, between described housing and core body by epoxy resin encapsulated.
Described plug is plastic tube, passes from the center hole of the bottom of housing and top cover.
Described composite membrane can be, the function band of one side is the limit of staying without coating, and the function band of another side is that coating adds webbing, the width in described continuous coating district be substantially equal to two show isolation the blockage electrodes and in the informal voucher three width sum of leaving a blank; Leaving a blank in each does not have direct conductive path between blockage electrode of informal voucher both sides, and the blockage electrode of each continuous coating consists of electrode both sides is interconnected through coating continuously by conducting bridge; Rear stacked with two-layer this metal metallized safety film left-right symmetric and the distance that staggers in the horizontal, stay limit and the coating of levels add the interlaced correspondence of webbing, make the both sides of lamination add webbing and all be positioned at outstanding position, be convenient to add webbing and be connected metal spraying and be connected and be connected with the extraction electrode terminal again; Simultaneously levels in the leave a blank center line in the center line of informal voucher and coating continuously district basically overlap, the grid regions of levels makes each blockage electrode consist of miniature small capacitor C with electrode and the interelectrode medium that the continuous coating of relative adjacent bed consists of respectively with mutual up and down, coating district is corresponding continuously; Conducting bridge between adjacent continuous coating electrode on each blockage electrode that isolation arranged and this tunic becomes the miniature fuse R of for this reason little capacitor C; By on the tunic of up and down mutually two the miniature small capacitor C parallel connection that is connected of corresponding two conducting bridges consist of minimum basic electronic component E.
Due to each inner coating continuously full-mesh in the vertical, each basic electronic component E is connected in parallel with adjacent basic electronic component in the vertical by the electrode of the continuous coating formation of its levels, laterally be connected in series with adjacent basic electronic component simultaneously, and by the interior informal voucher of leaving a blank, different potentials electrode between horizontal adjacent basic electronic component is done the insulation isolation, laterally to count n be 2 extraordinarily 1 of the bar quantity that blanks on composite membrane to the total basic electronic component of series connection, and n is odd number.
The basic electronic component that above-mentioned coating adds the webbing inboard and coating add isolated interstice row culture that continuous coating electrode that webbing is connected added extension and vertically isolate and consist of semicontinuous electrode block.
The transverse width of each inner basic electronic component and electrode area respectively all about equally, in leave a blank the informal voucher width haply for staying 1.5～2 times of hem width degree; Stay the limit and in the distance of leaving a blank between informal voucher compare with the interior stripe pitch that blanks, haply large 10%; Add webbing and compare with 1/2 of the stripe pitch that blanks in each with the distance of leaving a blank in it is nearest between informal voucher, haply large 15%～25%; Vertical width of all blockage electrodes is about 5～10mm about equally, the transverse width of each row blockage electrode also about equally, blank in being about stripe pitch or in 1/4 of the distance between informal voucher and Liu Bian of leaving a blank; For horizontal high order end and these two basic electronic components of low order end, it comprises the outer blockage electrode by isolation that stays the inboard, limit, add the transverse width that electrode that the semicontinuous electrode block of webbing inboard is connected with them forms, than middle other each inside transverse width large 15%～25% of electronic component substantially.
Described composite membrane can be also, and its dual-side is the limit of staying without coating, and perhaps its dual-side is coating and adds webbing, has coating to add that tunic of webbing than the large 1.5～3mm of the transverse width that tunic that stays the limit is arranged.When aiming at lamination with this two kinds of metal metallized safety films up and down center line, both sides coating adds webbing and all is positioned at outstanding position, is convenient to add webbing and is connected metal spraying and is connected and is connected with electrode terminal; The width in described continuous coating district be substantially equal to two show isolation the blockage electrodes and in the informal voucher three width sum of leaving a blank; Leaving a blank in each does not have direct conductive path between blockage electrode of informal voucher both sides, and the blockage electrode of each both sides, continuous coating district is interconnected through coating continuously district by conducting bridge; The center line in the center line of informal voucher and continuous coating district of leaving a blank in levels overlaps basically, and the blockage electrode of levels is mutually corresponding up and down with coating continuously district.The blockage electrode of levels consists of miniature small capacitor C with the continuous coating electrode of relative adjacent bed and interelectrode medium respectively; Conducting bridge between adjacent continuous coating electrode on each blockage electrode that isolation arranged and this tunic becomes the miniature fuse R of for this reason little capacitor C; By on the tunic of up and down mutually two the miniature small capacitor C parallel connection that is connected of corresponding two conducting bridges consist of minimum basic electronic component E, each basic electronic component E is connected in parallel with adjacent basic electronic component in the vertical by the continuous coating electrode of its levels, laterally be connected in series with adjacent basic electronic component simultaneously, and by the interior informal voucher of leaving a blank, different potentials electrode between horizontal adjacent basic electronic component done the insulation isolation.It is 2 times of bar quantity of blanking on composite membrane that total basic electronic component of the horizontal series connection of this structure is counted n, and n is even number.
The basic electronic component that described coating adds the webbing inboard and coating add isolated interstice row culture that continuous coating electrode that webbing is connected added extension and vertically isolate and consist of semicontinuous electrode block; The transverse width of each inner basic electronic component and electrode area are all substantially equal respectively, in leave a blank the informal voucher width haply for staying 1.5～2 times of hem width degree; Stay Bian Yuqi nearest in the distance of leaving a blank between informal voucher compare with the stripe pitch that blanks in each, haply large 10%; Coating adds webbing and compares with 1/2 of the stripe pitch that blanks in each with the distance of leaving a blank in it is nearest between informal voucher, and haply large 15%～25%; Vertical width of all blockage electrodes is roughly 5～10mm about equally, transverse width also about equally, blank in being roughly stripe pitch or in 1/4 of the distance between informal voucher and Liu Bian of leaving a blank; For horizontal high order end and these two basic electronic components of low order end, it comprises the blockage electrode that isolation is arranged that stays the inboard, limit, and the coating semicontinuous electrode block that adds the webbing inboard with they mutually
ConnectElectrode form the transverse width of electrode, than the transverse width large 15%～25% of middle other each inner basic electronic component.
In each basic electronic component of the utility model, the blockage electrode that isolation is arranged of two miniature small capacitors has conducting bridge separately, the protection when the responsible electric weakness that may exist the areas of dielectric of miniature small capacitor is punctured by too high voltages.Conducting bridge plays the effect of current limiting fuse, breakdown potential fails to be convened for lack of a quorum and immediately conducting bridge is fused, the blockage electrode that isolation is arranged of this miniature small capacitor is cut off with the capacitor element overall electrode for a full due together with breakdown point, the integral capacitor device has only reduced atomic little capacitance and has not affected its work, realizes safe self-healing.The protection that prevents puncture short is assigned to thousands upon thousands miniature small capacitors makes independently distributed protection; each miniature small capacitor miniature fuse that private conducting bridge consists of separately; only flow through the electric current that belongs to this miniature small capacitor on this fuse; be not subjected to the interference of other any electric currents; thereby can be by this limiting current of fuse value of design; guarantee that miniature fuse reaches the reliability requirement of protection sensitivity and safe self-healing; the energy that occurs when guaranteeing fusing can not make medium injured, and electric weak point breakdown is not spread by effective self-healing.The electrode area of single miniature small capacitor is very little, and the power current value that flows through conducting bridge when making work is also very little, and the additional heating of its generation can be ignored in the technical program.
In the basic electronic component of each of the technical program electrode structure, because two miniature small capacitors be without the isolation connection in the vertically continuously coating district of one of two membranes, make the electrode of all the basic electronic components in whole longitudinal row become to be connected in parallel, make the capacitance addition of all the basic electronic components in longitudinal row form larger capacity, and work under same voltage; All basic electronic components and other basic electronic component adjacent of lateral outer side in whole longitudinal row, be connected by continuous coating district on a skim, mutually isolated by the interior informal voucher of leaving a blank on another tunic, the basic electronic component of adjacent longitudinal row is consisted of in the horizontal be connected in series, but their operating voltage addition and make the power condenser element after coiling obtain the work high voltage of many times.
The technical scheme that the utility model adopts, following problem is taked the corrective measure of innovation in design, and had good technique effect:
1, in order to make each basic electronic component in series connection that balanced operating voltage be arranged, each basic electronic component in the horizontal shared film roomy cause equal.But owing in two axial ends, partial discharge occuring easily at the high-voltage power capacitor element, so the technical program is to horizontal high order end and the basic electronic component of these two row of low order end, its electrode transverse width (width of the blockage electrode that includes isolation and relative continuous coating electrode) is designed to the electrode width large 15%～25% than middle other basic electronic components, can under certain partial discharge inception voltage, total operating voltage of dry-type high-voltage power capacitor element be improved relatively.
2, the series voltage value that is two basic electronic components due to interior voltage of leaving a blank the required isolation of informal voucher, it should be the twice of single basic electronic component operating voltage, and stay operating voltage between just this basic electronic component two membranes of the required isolation in limit, so in the informal voucher width design of leaving a blank become to stay 1.5～2 times of hem width degree.
3, carrying out protection for the overcurrent damage that further may be occurred the connection that adds between webbing and metal spraying electrode controls; do not make this damage at the vertical vertical spread of film; therefore to add the basic electronic component that webbing is connected and make particular design: add with coating the layer electrodes that webbing is connected on composite membrane; lateral isolation space bar with the square electrode is made longitudinal subdivision to the extension segment that adds webbing, and the connection that this coating is added between webbing and metal spraying electrode damages between two sections additional extended space bars that are limited in this basic electronic component.
4, the design makes in two microminiature capacitors of basic electronic component, with each have the blockage electrode of isolation relative be continuous coating electrode without isolation, make the space bar decreased number half, increased the film utilance, but still can realize safeguard protection.
5, can not make medium injured in order to ensure the energy of miniature fuse when the electric weak point breakdown of protection fuses, the electricity weak point breakdown is not spread by effective self-healing, reach the reliability requirement of protection sensitivity and safe self-healing, fundamentally done effective improvement in electrode structural designs: namely two miniature small capacitors of minimum basic electronic component respectively have a private miniature fuse, only flow through the electric current that belongs to this miniature small capacitor on this fuse, be not subjected to the interference of other any electric currents, thereby can be by this limiting current of fuse value of design, guarantee that miniature fuse reaches the reliability requirement of protection sensitivity and safe self-healing, make also that in the thin film dielectrics of power condenser element, electric weakness obtains major improvement to the restricted problem that improves medium work field intensity, thereby can improve capacitor specific volume characteristic, dwindle small product size, save material in a large number, the safeguard protection of this structure is to carry out under minute work voltage of basic electronic component, disjunction voltage is not high, breaking current is minimum, can not produce that arcing is restriked and short circuit phenomenon, each element in the replaced conventional art that falls and the external circuit breaker of unit, safety and reliability, connection is simple, Financial cost is lower.
6, in order to be applicable to high pressure or ultrahigh voltage power field, the housing of this capacitor element is made of plastics, and can improve insulation property; Plug adopts hollow structure, has further improved the radiating effect of capacitor element.
7, cylindrical dry type high-voltage power capacitor element needs reel thousands of circles and make with the composite membrane of two layers of said structure, when the two-layer composite membrane of above-mentioned aggregation type electrode structure is reeled, the lower membrane of last circle upper layer film inevitable and a rear circle closely sticks together, respond to by the interlayer mutual electromagnetic, the stacked relation that has formed again new duplicature, the circle so every increase is reeled, not only increased basic electronic component in parallel film vertical, again by electromagnetic induction effect between lamination, make element obtain to increase double basic electronic component in parallel and double capacitance.So on the whole, this structure of this programme, thousands upon thousands basic electronic components of minimum are in the three dimensions of power condenser element, by electromagnetic induction superposition between the vertical parallel connection between mutually, laterally series connection, up and down lamination, set consists of an industrial frequency AC operating voltage and can reach several thousand and can reach the tens dry-type high-voltage power capacitor elements that arrive hundreds of kilovar to volts up to ten thousand, capacity.Its total capacity determines by the width of coiling film, total length and coiling number of total coils, the high-voltage value of its total working voltage by in the thin-film width scope laterally the size of the starting voltage of minute work voltage that can bear of the medium of the number of the basic electronic component of series connection, each member and partial discharge determine.Laterally the total basic electronic component of series connection count n be on composite membrane the Nei Liubian number 2 extraordinarily 1, n is odd number, does also can obtain series connection after certain variation design and ading up to even number by this structure mode.
The utility model dry-type high-voltage power capacitor component products, have the advantages such as dry construction, specific volume characteristic are good, miniaturization, long-life, can be directly installed on the elementary high-pressure side that basic unit uses piezoelectric transformer, substitute the low voltage power capacitor of poor transformer secondary output of life-span, or substitute the oil-immersed and high-voltage power capacitor that cost is high, pollution is arranged, very great economic worth is arranged.Present technique also can be used for improving the specific volume characteristic of locomotive power capacitor and other power electronic capacitors.
Description of drawings
Fig. 1 is the utility model embodiment 1 metal metallized safety film electrode structural chart.
Fig. 2 is 1 metal metallized safety film two-layer laminate schematic diagram embodiment illustrated in fig. 1.
The profile of Fig. 3 for doing along the A-A in Fig. 2.
Fig. 4 is the equivalent circuit diagram of the metal metallized safety film of two-layer laminate shown in Figure 2.
Fig. 5 is that the two stacked volume metal metallized safety films of the basic electronic component numbers of the utility model embodiment 2 series connection when being even number launch schematic diagrames.
The profile of Fig. 6 for doing along the C-C in Fig. 5.
Fig. 7 is cylindrical elements and the outer membrane exploded view that shown in Fig. 2 embodiment 1, the double-layer metallization safety diaphragm is wound into, and wherein Φ represents the radial direction of cylindrical elements, and Z represents the axial direction of cylindrical elements, is also the horizontal direction of film.
Fig. 84 layers of profile of reeling and enclosing of radially outermost for doing along the B-B in Fig. 7.
Fig. 9 is the equivalent circuit diagram of the metal metallized safety film of 4 layers of circle of reeling shown in Figure 8.
Figure 10 is the utility model dry-type high-voltage power capacitor component structure schematic diagram.
Figure 11 is that the utility model element is with the figure that assembles of star method access three-phase four-wire high voltage net.
Description of reference numerals: coating adds webbing 1.1, and continuously the coating district 1.11, semicontinuous electrode block 1.12, blockage electrode 1.21, the blockage electrode 1.22 of side, conducting bridge 1.23, stay limit 2.1, in the informal voucher 2.2 of leaving a blank, short space fillet 2.21, extend space bar 2.22, upper layer film S, lower membrane X, basic electronic component E, miniature small capacitor C, the equivalent miniature fuse R that conducting bridge consists of, medium basement membrane J, metal spraying P, top cover 1, plug 2, electrode terminal 3, housing 4, insulating resin 5, core body 6, bottom 7, anchor ear 8.
Embodiment:
Below in conjunction with drawings and Examples, the utility model is further described.
Embodiment 1:
A kind of metal metallized safety film dry-type high-voltage power capacitor element as shown in figure 10, mainly formed by housing 4, core body 6, extraction electrode terminal 3, core body is by upper stacked plug 2, the formed cylinder of two ends metal spraying P of being wound on of composite membrane that plating zinc/the aluminum metal layer electrodes consists of of two layers of polypropylene medium basement membrane J, housing 4 has top cover 1 and bottom 7, plug 2 is the plastic hollow pipe, between housing and core body, by insulating resin 5 embeddings, insulating resin adopts epoxy resin usually.
as shown in Figure 1-Figure 3, the composite membrane that consists of core body is divided into several vertical blocks of cells in the horizontal by some informal vouchers 2.2 of leaving a blank in vertically, the both sides in the continuous coating district in each blocks of cells are grid regions, each grid regions, also namely in the both sides of the interior informal voucher 2.2 of leaving a blank and Liu Bian 2.1 inboards, by short space fillet 2.21, coating is cut apart the blockage electrode 1.21 that isolation forms a row longitudinal arrangement, one side of each blockage electrode with in informal voucher 2.2 adjacency of leaving a blank, relative opposite side is communicated with coating continuously district by the private conducting bridge 1.23 at the middle part of the vertical short space fillet that is arranged on each little side's electrode block, continuous function band on the dual-side of composite membrane is shaped with respectively vertically, this function band for a side of composite membrane for without coating stay limit 2.1, another side is that coating adds webbing 1.1, stay Bian Yuqi nearest in the distance of leaving a blank between informal voucher compare with the stripe pitch that blanks in each, haply large 10%, the distance of leaving a blank in adding webbing and it being nearest between informal voucher is compared with 1/2 of the stripe pitch that blanks in each, and haply large 15%～25%.In informal voucher 2.2 width of leaving a blank be about 1.5～2 times that stay limit 2.1 width; Vertical width of all blockage electrodes is about 5～10mm about equally, the transverse width of each row blockage electrode also about equally, blank in being about stripe pitch or in 1/4 of the distance between informal voucher and Liu Bian of leaving a blank.By direction as shown, only be positioned at Far Left leave a blank informal voucher the left side and be positioned at the transverse width that stays this two row blockage electrode 1.22 of 2.1 left sides, limit than the transverse width value large 15%～25% of other inner blockage electrodes 1.21 that respectively are listed as; Leave a blank between informal voucher 2.2 or the most right inside leaving a blank between informal voucher 2.2 and Liu Bian 2.1 in vertically for wantonly two, to show middle remainder the blockage layer electrodes of isolation be the continuous electrode coating district 1.11 that does not have in the vertical to separate except two, the transverse width in each continuous coating district 1.11 is roughly the same, is about the informal voucher 2.2 width three sums of leaving a blank in two row little side's electrode block 1.21 width and; It is also continuous electrode coating district that coating adds between webbing 1.1 inboards and blockage electrodes series 1.22, but it only adds webbing 1.1 with coating in the horizontal and is connected continuously, but be isolated in the vertical the space bar to extension space bar 2.22 separations that add the webbing extension, only formed and added with coating the semicontinuous electrode block 1.12 that webbing is connected in the horizontal, and be communicated with blockage electrodes series 1.22 by private conducting bridge 1.23, the transverse width of this semicontinuous electrode block is approximately than 1/2 width value large 15%～25% in continuous coating district, centre 1.11.
When rolling capacitor element, two-layer above-mentioned metal metallized safety film symmetry is stacked, as shown in Figure 3 in Fig. 2 and section thereof, upper layer film S and lower membrane X stagger in the horizontal apart from 0.8～1.5mm, make stay limit 2.1 and the coating of up and down film add the interlaced correspondence of webbing 1.1, the both sides coating of lamination adds webbing 1.1 and all is positioned at outstanding position, is convenient to coating and adds webbing and be connected with outside metal spraying P.the continuous coating district 1.11 of the levels blockage electrode that isolation is arranged 1.21 with grid regions respectively is mutually corresponding, makes continuous coating electrode 1.11 and miniature small capacitor C of the formation of the medium between them relative on little side's electrode block 1.21 that isolation is arranged and the adjacent bed X film on the S film, simultaneously on the electrode that consists of of the continuous coating district on the S film 1.11 and adjacent bed X film, little side's electrode block 1.21 that isolation is arranged and the medium between them of relative grid regions also consists of a miniature small capacitor C, above-mentioned these two miniature small capacitors are left a blank in this layer and are left a blank between informal voucher 2.2 in informal voucher 2.2 and adjacent bed, two miniature small capacitor C respectively have a private conducting bridge that plays the fuse effect 1.23 that blockage electrode 1.21 own is connected with the continuous coating electrode of another miniature small capacitor C, make between the electrode of these two miniature small capacitors parallel with one another, consist of the minimum basic electronic component E of dry-type high-voltage power capacitor element of the present utility model.
The electrode that consists of due to the continuous coating district 1.11 of two miniature small capacitor C of the basic electronic component E of minimum respectively in the longitudinal extent on two membranes without the isolation full-mesh, therefore the basic electronic component of each longitudinal row all is connected in parallel in vertical length range of composite membrane, work under same voltage after the basic electronic component parallel connection of same row, capacitance is the capacitance sum of all members in parallel.The electrode that consists of without the continuous coating of isolation district 1.11 of two miniature small capacitor C of minimum basic electronic component E is connected with the electrode that consists of without the continuous coating of isolation district 1.11 of the basic electronic component of the adjacent longitudinal row of left and right sides on two membranes respectively, making between the wide basic electronic component of each adjacent columns of full film has an electrode mutually to be connected in series, as shown in Fig. 4 equivalent electric circuit; Minute work voltage of each basic electronic component and the total n that laterally connects have determined the total working voltage of dry-type high-voltage power capacitor unit.Junction between the electrode that the continuous coating district 1.11 of two adjacent basic electronic components consists of is positioned at the central authorities of continuous coating sector width, relative with it informal voucher 2.2 of leaving a blank in just on another tunic, make levels in the leave a blank center line in the center line of informal voucher and continuous coating district basically overlap, in leave a blank informal voucher 2.2 for having played the effect of insulation isolation between two different potentials electrodes of head and the tail of these two basic electronic components that are in series; Between the head and the tail of the two basic electronic components that are in series, voltage should be the twice of the operating voltage of single basic electronic component E, therefore the width of the informal voucher 2.2 of leaving a blank in getting is to stay 1.5～2 times of limit 2.1 width.
Outermost in two membranes, by coating add webbing 1.1 inboards each semicontinuous electrode block 1.12, isolation arranged blockage electrode 1.22 respectively with the adjacent bed film on the blockage electrode 1.21 that isolation is arranged that stays 2.1 inboards, limit, the electrode that consists of without the continuous coating 1.11 of isolation mutually corresponding, consist of the minimum electronic component E substantially of outermost longitudinal row.The transverse width of the basic electronic component of this outermost and capacitance are larger 15%～25% than inner basic electronic component, and this is between the two positive and negative electrode edges at both ends, local point discharge to occur and damage because common metal metallized safety film dry-type high-voltage power capacitor element is the easiest.According to condenser voltage formula V=I/2 Л fC, increase capacitance C, can suitably reduce the basic electronic component operating voltage of outermost V, make it more lower than partial discharge inception voltage, the functional reliability that improves capacitor increases the service life, or relatively improves operating voltage and the total working voltage of inner each series-connected stage electronic component.
the electrode that the continuous coating district 1.11 of the electrode that consists of in the continuous coating district 1.11 of staying on the inboard rete in limit and transversely inboard adjacent basic electronic component consists of is in series, the electrode that consists of with the continuous coating district 1.11 of vertical adjacent basic electronic component simultaneously is in parallel, and on another tunic, coating adds the inboard semicontinuous electrode block 1.12 of webbing 1.1 and vertically between adjacent basic electronic component, isolation is arranged, directly channelling of electric current, can only add by the coating in scope own webbing and metal spraying external electrode could with adjacent basic electronic component between in parallel, in case coating adds webbing 1.1 and the damage of metal spraying external electrode is opened circuit, can't consist of the two poles of the earth path between this basic electronic component and adjacent basic electronic component and be isolated by cutout, coating add webbing 1.1 and metal spraying external electrode damage just be isolated in vertical width range of a basic electronic component by space bar 2.22 within, in case having overcome the prior art somewhere adds webbing 1.1 and metal spraying external electrode and damages namely in the vertical outwards rapid spread, the defective that element heating is damaged.
Utilize the described electrode structure of the present embodiment to reel and to form the core body of dry-type high-voltage power capacitor element.As seen from Figure 4, played simultaneously and made basic electronic component E laterally series connection and vertical connection function in parallel due to the continuous coating district 1.11 on stacked two membranes, made basic electronic component E realize the set of vertical and horizontal two dimension; Again as seen from Figure 9, (Fig. 9 is Fig. 7, shown in Figure 8ly radially intercepts four circles on the element of completing rolling, every circle two membranes amounts to the equivalent electric circuit in radially and horizontal two dimension of 8 tunics), diametrically because the electromagnetic induction of interlayer can form basic electronic component, therefore can find out that on this circuit diagram radially 8 layers have consisted of the stacked basic electronic component of 7 row.Each rete of reeling circle is close to the effect of generation electromagnetic induction, and the number in parallel of basic electronic component E is almost doubled again, has realized diametrically set.By hundreds thousand of basic electronic components laterally connect, the vertical superposition up and down of in parallel and each winding layer, realized the set in three dimensions, consist of the dry-type high-voltage power capacitor element.
Utilize the described electrode structure coiling of the present embodiment dry-type high-voltage power capacitor element, polypropylene media basement membrane J, zinc/aluminum composite metal safety diaphragm key dimension are as selecting representative value to be: the width of metal metallized safety film is chosen as 150mm, and series connection progression n is 7.The thickness of metal metallized safety film is 7 μ m commonly used, and the diameter d of capacitor element is Φ 60mm, 1821 circles of reeling on Φ 9mm plastics plug.
The present embodiment dry-type high-voltage power capacitor element, calculate with at present general work field strength level 70Vac/ μ m, minute work voltage of single basic electronic component is 490Vac, minute work voltage of the basic electronic component at two ends is about 408Vac, the total working voltage of unit can reach 3266Vac, and capacity reaches the 10KVar left and right.By the Y-connection method of two the shown in Figure 11 cylinder capacitor elements that are connected into, can be directly used in 11.3KVac three-phase high-voltage electrical network, reach safe and reliable long-life work.If improving, the work field intensity brings up to 120Vac/ μ m, can use polypropylene media, the zinc/aluminum composite metal safety diaphragm of 4.5 μ m thickness instead, roll into overall dimension with above-mentioned identical dry-type high-voltage power capacitor element, minute work voltage of single basic electronic component is 540Vac, minute work voltage of the basic electronic component at two ends is about 450Vac, the total working voltage of element also can reach 4140Vac, and capacity reaches the 30KVar left and right.With two as shown in figure 10 the cylinder that is connected into of element, by as shown in figure 11 Y-connection method, can be directly used in 14.3KVac three-phase high-voltage electrical network, reach safe and reliable long-life work, energy storage density is about the improvement of work field intensity improves, the material film attenuate is front 3 times.
The utility model is not limited to above-described embodiment, also can make in force other improvement variation and extending design, and for example: embodiment 2:
A kind of metal metallized safety film dry-type high-voltage power capacitor element as shown in figure 10, mainly formed by housing 4, core body 6, extraction electrode terminal 3, core body is by upper stacked plug 2, the formed cylinder of two ends metal spraying P of being wound on of composite membrane that plating zinc/the aluminum metal layer electrodes consists of of two layers of polypropylene medium basement membrane J, housing 4 has top cover 1 and bottom 7, plug 2 is the plastic hollow pipe, between housing and core body by insulating resin 5 embeddings.consist of the stacked two-layer composite membrane of the polypropylene media plating zinc of core body 6/aluminum metal layer electrodes and be divided in the horizontal several vertical blocks of cells by some informal vouchers 2.2 of leaving a blank in longitudinally, the both sides in the continuous coating district 1.11 in each blocks of cells are grid regions, each grid regions is cut the blockage electrode 1.21 that isolation forms a row longitudinal arrangement to coating by short space fillet 2.21 and is consisted of, one side of each blockage electrode 1.21 with in informal voucher 2.2 adjacency of leaving a blank, relative opposite side is communicated with coating continuously district 1.11 by the private conducting bridge 1.23 that is arranged on fillet 2.21 middle parts, short space longitudinally.Be with the difference of above-described embodiment 1: wherein two sides of one deck composite membrane are all to stay limit 2.1 without coating, two sides of another layer composite membrane are all that coating adds webbing 1.1, but have on that tunic that stays limit 2.1 in blank the bar number have than another layer on that tunic that adds webbing 2.1 in the bar number that blanks lack 1, that tunic that adds webbing is arranged than the large 1.5～3mm of the transverse width that tunic that stays the limit is arranged, when up and down tunic center line is aimed at lamination, both sides add webbing 1.1 and all are positioned at outstanding position, are convenient to add webbing and are connected with outside metal spraying P.
The architectural feature of all the other aspects is all identical with above-described embodiment 1: consist of miniature small capacitor C with electrode and the interelectrode medium that the continuous coating of relative adjacent bed district 1.11 consists of respectively as the blockage electrode 1.21 of levels; The miniature fuse R of the 1.23 one-tenth for this reason little capacitor C of conducting bridge between the electrode that the adjacent continuous coating district 1.11 on each blockage electrode that isolation arranged and this tunic consists of; By on the tunic of up and down mutually two the miniature small capacitor C parallel connections that are connected of corresponding two conducting bridges 1.23 consist of minimum basic electronic component E, each basic electronic component E is connected in parallel with adjacent basic electronic component in the vertical by the continuous coating district 1.11 of its levels, laterally be connected in series with adjacent basic electronic component simultaneously, and by the interior different potentials electrode do insulation isolation between 2.22 pairs of horizontal adjacent basic electronic components of informal voucher of leaving a blank.The basic electronic component that coating adds the webbing inboard and coating add isolated interstice bar 2.22 that continuous coating electrode that webbing 1.1 is connected added extension and do vertically that isolation consists of the semicontinuous electrode block 1.12 with safeguard function; The transverse width of each inner basic electronic component and electrode area are all substantially equal respectively, in leave a blank the informal voucher width haply for staying 1.5～2 times of hem width degree; Stay the limit and in the distance of leaving a blank between informal voucher compare with the interior stripe pitch that blanks, haply large 10%; Add webbing and compare with 1/2 of the interior stripe pitch that blanks with the interior distance of leaving a blank between informal voucher, haply large 15%～25%; Vertical width of all blockage electrodes 1.21 is roughly 5～10mm about equally, transverse width also about equally, blank in being roughly stripe pitch or in 1/4 of the distance between informal voucher and Liu Bian of leaving a blank; For horizontal high order end and these two basic electronic components of low order end, it semicontinuous electrode block 1.12 electrode relative with them that comprises that outer blockage electrode 1.22, the coating by isolation that stays 2.1 inboards, limit adds webbing 1.1 inboards forms the transverse width of electrode, than middle other each inner transverse width large 15%～20% of electronic component substantially.Identical coating adds webbing 1.1, stay limit 2.1 with in informal voucher 2.2 distance relation, the width relation each other of leaving a blank, the identical blockage electrode 1.21 or 1.22 that isolation is arranged, without planform, size, the position of the continuous coating district 1.11 of isolation or semicontinuous electrode block 1.12, conducting bridge 1.23 etc., interconnect or isolated relation and the lamination corresponding relation after reeling.The present embodiment 2 laterally the basic electronic component of series connection to count n be even number, be leave a blank in adding between webbing 1.1 twice of number of informal voucher of two coating.
In the present embodiment 2, the polypropylene media of dry-type high-voltage power capacitor element, zinc/aluminum composite metal safety diaphragm key dimension are example as selecting following representative value: the width of metal metallized safety film is chosen as 150mm, and series connection progression n is 8.The thickness of metal metallized safety film is 7 μ m commonly used, and the diameter of capacitor element is Φ 60mm, 1821 circles of reeling on Φ 9mm plastics plug.The dry-type high-voltage power capacitor element that rolls into according to said structure, calculate with at present general work field strength level 70Vac/ μ m, minute work voltage of single basic electronic component is 490Vac, minute work voltage of the basic electronic component at two ends is about 408Vac, the total working voltage of unit can reach 3756Vac (higher than embodiment 1), and capacity reaches the 10KVar left and right.
The technical program comprises that the electrode structure of above-mentioned two embodiment is when making power condenser element, compared with prior art design the electrode area of single miniature small capacitor very littlely, vertical wide 5～10mm that is designed to, the horizontal wide 7～12mm that is designed to, not only make the capacitance of each basic electronic component only account for tens0000 of whole capacitor element capacity/, reduced the capacitance loss of each self-healing; And the transverse electrode width of industrial frequency AC work is compared with 50～150mm of common metal power condenser element, be reduced to 3～6 times, working current density also is directly proportional and reduces, this has just reduced the work temperature rise greatly, be conducive to when making the thermal design of power condenser element, to increase element diameter with equal proportion, the maximum gauge limit value causes from 60 present～80mm and reduces large 3 times, more than reaching 200mm, make the capacity of each element reach the order of magnitude of hundreds of kilovars.
The power condenser element that this aggregation type electrode structure is made, the width of film is only decided by magnitude of voltage and the series connection progression of required working voltage, and be subjected to the transverse electrode width of industrial frequency AC work and the restriction of maximum operating currenbt density unlike the common metal power condenser element, thereby can bringing up to similar length to oil-immersed type power capacitor element 280mm～500mm with the maximum length of the wide corresponding dry power condenser element of film from present common 150mm, only be decided by the width capabilities of coiling production machinery and the requirement of accuracy class.Due to the raising of element maximum length, further improved again the capacity of single power condenser element, can reach the order of magnitude of thousand kilovars.Leement duration is decided by series connection progression, so along with the length of dry power condenser element increases, can make its discrete component operating voltage below kilovolt, brings up to more than ten thousand volts.
As Figure 10, shown in Figure 11, in the capacitor element global design, can use plastic casing, epoxy resin encapsulated, without metal shell, itself insulate appearance; And draw the electrode terminal 3 that is connected with metal spraying P from axial two ends, be convenient to interelement from beginning to end, and with plastics anchor ear 8 or other insulated connectors spares of wide approximately 40mm left and right, can be connected and fixed the shell of two series element bodies, become a plastic cylinder integral body, directly doing networks connects, and the occupation of land space is little, connects simple.
This aggregation type electrode structure is when making power condenser element, can not twist in film as the common metal power condenser element on the filled circles plug that external diameter is 9～15mm, after metal spraying the integral body shell epoxy resin encapsulated of packing into, increase the approximately plastic hollow pipe of 3 times of left and right but change plug into diameter, length greater than the wide 10mm of film left and right, and can pass from the center hole of the bottom 7 of shell and top cover 1, make element core body 6 after fixing and encapsulated epoxy resin, plug is connected with body seal in shell 4 as a whole; Make the center energy ventilation and heat of power condenser element due to the hollow space of plug, thereby changed power condenser element in energising work and the radial distribution of the internal temperature rise of adstante febre.Traditional structure is the highest in element penetrale (namely near the plug place) temperature rise, outwards minimum near the shell place, after improvement, thermolysis due to the element center, original maximum temperaturerise has been descended greatly, thereby improve security reliability and the useful life of power condenser element, also be conducive to allow the diameter that increases power condenser element when thermal design.
Above-described embodiment is only object lesson of the present utility model, and all equivalences of doing according to the content of the utility model application range change and modify, and all should be the protection range of technical solutions of the utility model.
Claims (10)
1. metal metallized safety film dry-type high-voltage power capacitor element, mainly by housing, core body, electrode terminal forms, core body is the stacked formed cylinder of plug two ends metal spraying that is wound on of composite membrane by the upper plating zinc of two layers of polypropylene medium basement membrane (J)/aluminum metal layer electrodes formation, between housing and core body by the insulating resin embedding, it is characterized in that described composite membrane is divided into several vertical blocks of cells in the horizontal by some informal vouchers (2.2) of leaving a blank in longitudinally, the both sides in the continuous coating district in each blocks of cells are grid regions, each grid regions is cut apart blockage electrode (1.21) formation that isolation forms a row longitudinal arrangement to coating by short space fillet (2.21), one side of each blockage electrode (1.21) with in informal voucher (2.2) adjacency of leaving a blank, relative opposite side is communicated with continuous coating district (1.11) by the private conducting bridge (1.23) that is arranged on short space fillet (2.21) middle part, continuous function band on the dual-side of composite membrane is shaped with respectively vertically.
2. metal metallized safety film dry-type high-voltage power capacitor element according to claim 1, is characterized in that described function band adds webbing (1.1) for stay limit (2.1) or coating without coating.
3. metal metallized safety film dry-type high-voltage power capacitor element according to claim 1 and 2, the function band that it is characterized in that described composite membrane one side is for staying limit (2.1) without coating, the function band of another side is that coating adds webbing (1.1), the width in described continuous coating district (1.11) be substantially equal to two show isolation blockage electrodes (1.21) and in informal voucher (2.2) three's width sum of leaving a blank; Leaving a blank in each does not have direct conductive path between blockage electrode of informal voucher both sides, and the blockage electrode (1.21) of each both sides, continuous coating district (1.11) is interconnected through coating district (1.11) continuously by conducting bridge (1.23); Stacked with two-layer this metal metallized safety film left-right symmetric and the distance that staggers in the horizontal, stay limit (2.1) and the coating of levels add the interlaced correspondence of webbing (1.1), make the both sides coating of lamination add webbing and all be positioned at outstanding position, be convenient to coating and add webbing and be connected metal spraying and be connected and be connected with electrode terminal again; Simultaneously levels in the leave a blank center line in the center line of informal voucher and coating continuously district basically overlap, the grid regions of levels makes each blockage electrode (1.21) consist of miniature small capacitor C with electrode and the interelectrode medium that the continuous coating of relative adjacent bed (1.11) consists of respectively with mutual up and down, coating district is corresponding continuously; Conducting bridge (1.23) between adjacent continuous coating district (1.11) on each blockage electrode that isolation arranged and this tunic becomes the miniature fuse R of for this reason little capacitor C; Consist of minimum basic electronic component E by on the tunic of up and down, mutually two miniature small capacitor C being connected of corresponding two conducting bridges (1.23) are in parallel; Each inner coating district (1.11) continuously is full-mesh in the vertical, each basic electronic component E is connected in parallel with adjacent basic electronic component in the vertical by the continuous coating electrode (1.11) of its levels, laterally be connected in series with adjacent basic electronic component simultaneously, and by the interior informal voucher of leaving a blank (2.2), different potentials electrode between horizontal adjacent basic electronic component done the insulation isolation.
4. metal metallized safety film dry-type high-voltage power capacitor element according to claim 3 is characterized in that basic electronic component that coating adds the webbing inboard and coating add isolated interstice bar (2.22) that continuous coating electrode that webbing (1.1) is connected added extension and does vertically that isolation consists of semicontinuous electrode block (1.12).
5. metal metallized safety film dry-type high-voltage power capacitor element according to claim 3, the transverse width and the electrode area that it is characterized in that each inner basic electronic component are all substantially equal respectively, in leave a blank the informal voucher width haply for staying 1.5～2 times of hem width degree; Stay Bian Yuqi nearest in the distance of leaving a blank between informal voucher compare with the stripe pitch that blanks in each, haply large 10%; The distance of leaving a blank in coating adds webbing and it is nearest between informal voucher is compared with 1/2 of the stripe pitch that blanks in each, and haply large 15%～25%; Vertical width of all blockage electrodes (1.21) is roughly 5～10mm about equally, transverse width also about equally, blank in being roughly stripe pitch or in 1/4 of the distance between informal voucher and Liu Bian of leaving a blank.
6. metal metallized safety film dry-type high-voltage power capacitor element according to claim 1 and 2, the function band that it is characterized in that the dual-side of composite membrane is and stays limit (2.1) without coating, perhaps be coating and add webbing (1.1), have coating to add that tunic of webbing than the large 1.5～3mm of the transverse width that tunic that stays the limit is arranged; Aim at lamination with this two kinds of metal metallized safety films up and down center line, both sides coating adds webbing (1.1) and all is positioned at outstanding position, is convenient to coating and adds webbing and be connected metal spraying and be connected and be connected with electrode terminal; The width in described continuous coating district (1.11) be substantially equal to two show isolation blockage electrodes (1.21) and in informal voucher (2.2) three's width sum of leaving a blank; There is no direct conductive path between the blockage electrode (1.21) of each both sides, continuous coating district (1.11), only be interconnected through continuous coating district (1.11) by conducting bridge (1.23); The center line in the center line of informal voucher and continuous coating district of leaving a blank in levels overlaps basically, and the blockage electrode (1.21) of levels is with coating district (1.1) is mutually corresponding up and down continuously.
7. metal metallized safety film dry-type high-voltage power capacitor element according to claim 6, is characterized in that the blockage electrode (1.21) of levels consists of miniature small capacitor C with the continuous coating of relative adjacent bed district (1.11) and interelectrode medium respectively; Conducting bridge (1.23) between adjacent continuous coating district (1.11) on each blockage electrode that isolation arranged and this tunic becomes the miniature fuse R of for this reason little capacitor C; Consist of minimum basic electronic component E by on the tunic of up and down, mutually two miniature small capacitor C being connected of corresponding two conducting bridges (1.23) are in parallel, each basic electronic component E is connected in parallel with adjacent basic electronic component in the vertical by the continuous coating district (1.11) of its levels, laterally be connected in series with adjacent basic electronic component simultaneously, and by the interior informal voucher of leaving a blank (2.2), different potentials electrode between horizontal adjacent basic electronic component done the insulation isolation.
8. metal metallized safety film dry-type high-voltage power capacitor element according to claim 6 is characterized in that basic electronic component that coating adds the webbing inboard and coating add isolated interstice bar (2.22) that continuous coating electrode that webbing (1.1) is connected added extension and does vertically that isolation consists of semicontinuous electrode block (1.12); The transverse width of each inner basic electronic component and electrode area are all substantially equal respectively, in leave a blank the informal voucher width haply for staying 1.5～2 times of hem width degree; Stay Bian Yuqi nearest in the distance of leaving a blank between informal voucher compare with the stripe pitch that blanks in each, haply large 10%; The distance of leaving a blank in coating adds webbing and it is nearest between informal voucher is compared with 1/2 of the stripe pitch that blanks in each, and haply large 15%～25%; Vertical width of all blockage electrodes (1.21) is roughly 5～10mm about equally, transverse width also about equally, blank in being roughly stripe pitch or in 1/4 of the distance between informal voucher and Liu Bian of leaving a blank.
9. metal metallized safety film dry-type high-voltage power capacitor element according to claim 1 is characterized in that described housing (4), plug (2) make by plastics, between housing and core body (6) by epoxy resin encapsulated.
10. metal metallized safety film dry-type high-voltage power capacitor element according to claim 9, is characterized in that described plug (2) is the plastic hollow pipe.
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| CN 201320029091 CN203013522U (en) | 2013-01-08 | 2013-01-08 | Metallized safety film dry-type high-voltage power capacitor element |
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| CN 201320029091 CN203013522U (en) | 2013-01-08 | 2013-01-08 | Metallized safety film dry-type high-voltage power capacitor element |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177870A (en) * | 2013-01-08 | 2013-06-26 | 吴卫东 | Metalized safety film dry high-voltage power capacitor element |
| CN105895367A (en) * | 2016-05-26 | 2016-08-24 | 吴海兵 | Improvement of longitudinal isolation strip of metalized safety membrane electrode |
| CN114242456A (en) * | 2021-11-24 | 2022-03-25 | 安徽铜峰电子股份有限公司 | Metallized film for winding capacitor core and capacitor using the same |
-
2013
- 2013-01-08 CN CN 201320029091 patent/CN203013522U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177870A (en) * | 2013-01-08 | 2013-06-26 | 吴卫东 | Metalized safety film dry high-voltage power capacitor element |
| CN103177870B (en) * | 2013-01-08 | 2016-02-10 | 吴卫东 | A kind of metal metallized safety film dry-type high-voltage power capacitor element |
| CN105895367A (en) * | 2016-05-26 | 2016-08-24 | 吴海兵 | Improvement of longitudinal isolation strip of metalized safety membrane electrode |
| CN105895367B (en) * | 2016-05-26 | 2018-04-20 | 吴海兵 | A kind of electrode structure of metallizing safety membrane used in capacitor |
| CN114242456A (en) * | 2021-11-24 | 2022-03-25 | 安徽铜峰电子股份有限公司 | Metallized film for winding capacitor core and capacitor using the same |
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