CN202678110U - Dry type netted explosion-proof metallization film capacitor - Google Patents
Dry type netted explosion-proof metallization film capacitor Download PDFInfo
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- CN202678110U CN202678110U CN 201220335580 CN201220335580U CN202678110U CN 202678110 U CN202678110 U CN 202678110U CN 201220335580 CN201220335580 CN 201220335580 CN 201220335580 U CN201220335580 U CN 201220335580U CN 202678110 U CN202678110 U CN 202678110U
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- capacitor
- explosion
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- layer
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- 239000003990 capacitor Substances 0.000 title claims abstract description 83
- 238000001465 metallisation Methods 0.000 title abstract description 16
- 239000010410 layer Substances 0.000 claims abstract description 79
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 239000002184 metal Substances 0.000 claims abstract description 60
- 239000003822 epoxy resin Substances 0.000 claims abstract description 10
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims abstract description 8
- -1 polypropylene Polymers 0.000 claims abstract description 8
- 229920001155 polypropylene Polymers 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000011104 metalized film Substances 0.000 claims description 50
- 239000010408 film Substances 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 239000003989 dielectric material Substances 0.000 claims description 9
- 239000010409 thin film Substances 0.000 claims description 9
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 7
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000004069 differentiation Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000004880 explosion Methods 0.000 abstract description 4
- 239000011247 coating layer Substances 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 240000005561 Musa balbisiana Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a capacitor and especially relates to a dry type netted explosion-proof metallization film capacitor, which comprises a capacitor housing, a cover plate, capacitor cores, core lead-out electrodes, copper bands connecting the capacitor cores and the electrodes, and epoxy resin embedding materials filled inside the capacitor. The capacitor cores are formed by rolling metallization films. Each metallization film comprises polypropylene film dielectric layers and metallization layers. The capacitor is characterized in that the metallization film comprises one or more explosion-proof metallization film layers; the explosion-proof metallization film layers comprise polypropylene film dielectric layers and metallization layers A coated on the film dielectric layers; and the metallization layers A have a netted structure and are divided into multiple conducting metal grids by X type non-coating layer zones. The metallization film explosion-proof capacitor is enabled to have a miniaturization structure. The liquid leakage existing in mechanical explosion prevention is alleviated. The mechanical explosion-proof failure rate is lowered. The phenomenon of partial discharge of capacitor cores is eliminated. Meanwhile, the service lifetime of the capacitor is prolonged.
Description
Technical field
The present invention relates to a kind of capacitor, relate in particular to a kind of dry type mesh explosion-proof metallic film capacitor.
Background technology
Noinductive capacitor on the market is varied, and more common common employing pressure explosion-proof device adds the mode that liquid is filled.The puncture of losing efficacy occurs if its operation principle is exactly capacitor core, forming transcient short circuit time generation amount of heat gasifies metalized film, producing a large amount of gases increases the electric capacity internal pressure, until the capacitive pressure riot gear produces distortion electrode is broken, make the capacitor of working be in open-circuit condition, thereby reach the purpose that prevents the capacitor blast.But mostly this type of capacitor is liquid filling, complicated structure, and the processing technology difficulty is large, and the phenomenon that causes noinductive capacitor to scrap owing to mounting technology is bad often occurs, and also exists potting to consist of not performance hidden danger.In addition, because existing noinductive capacitor mainly is to adopt oil immersed type, this a kind of mode is mobile favourable to gas, but when noinductive capacitor lost efficacy, because the shell excessive deformation is easy to cause filler to leak, and capacitor has been used of seat belts some problems.Add that the oil immersed type capacitor need to clean shell, must use can make the chemical reagent of oiliness filler dissolving, such as banana oil etc., if process bad, not only to operating personnel's actual bodily harm, also can be to environment.
After losing efficacy, existing metallic film capacitor all can decompose generation gas, simultaneously with high temperature, and very easily quick-fried setting off an explosion and combustion phenomena, the safety protection structure that now adopts all adopts the mode of soldering, and the explosion-proof utmost point one end tin welding is on conductive pole, and other end soldering is on the iron plate of bursting diaphragm, this infrastructure product technological process is complicated, the quality of product processing is subjected to the impact of human factor larger, of poor quality, and loss is large, insulation resistance is low, self-healing performance is poor, unstable properties, the shortcoming such as overload capacity is poor.
Existing noinductive capacitor can not satisfy small power DC bus clamper, and the small-power wiring board is installed, in/needs of the field capacitors such as low-tension transformer, medium-high voltage frequency converter, wind-electricity integration frequency converter, high frequency electric source locomotive inverter.
Summary of the invention
The object of the invention is to remedy the deficiencies in the prior art, design a kind of dry type mesh explosion-proof metallic film capacitor, solve existing pressure explosion-proof device and add liquid filling capacitor arrangement complexity; Existing metallized film noinductive capacitor infrastructure product technological process is complicated, and is of poor quality, inflammable and explosive, poor reliability, the problem such as useful life is short.
Technical scheme of the present invention is as follows:
Dry type mesh explosion-proof metallic film capacitor, comprise capacitor case, cover plate, capacitor core, fuse extraction electrode, and the copper strips that connects capacitor core and electrode, be filled into the epoxy resin encapsulated material of capacitor internal, capacitor core is rolled by metallized film and forms, metallized film comprises the polypropylene film dielectric layer and is coated in metal layer on the thin film dielectrics layer, and it is characterized in that: described metallized film comprises one deck and above explosion-proof metallized film layer thereof; The explosion-proof metallized film layer comprises the polypropylene film dielectric layer and is coated in metal layer A on the thin film dielectrics layer by the zinc-aluminium that mixes; Metal layer A reticulates structure and is slit into one by one conducting metal grid by X-type without the coating differentiation.
Described metal layer A diamondwise network structure, adjacent X-shaped is without disconnecting between the coating district.
The conducting metal filament that is formed by the metal layer that applies between described conducting metal grid connects.
Metal layer A is that the zinc-aluminium metal that will mix is plated to one by one little conducting metal grid, and the metallization filament that connects these little conducting metal grids.Because the explosion-proof metallized film layer is a kind of netted metalized film, the conducting metal grid is coupled together by the conducting metal filament, the conducting metal filament just becomes anti-riot key structure, after the capacitor two ends add voltage, current i by electric capacity itself=j ω cv, when the electrode both end voltage increases for a certain reason, the electric current that flows through capacitor sharply increases with ω c amount doubly, the Joule heat that produces at the conductive metallization filament also sharply increases, and cause rapid rising of temperature consequently to blow the conducting metal filament, cut off electric current, all generations are very fast, can effectively prevent the generation that capacitance short-circuit punctures, capacitor uses the mechanism of this Novel violence-proof structure to be actually anti-riot as fuse, not only safety but also quick reliable, anti-riot sensitiveer than the oil immersed type electric capacity of anti-riot structure, avoid occuring transient voltage when too high anti-riot structure not have the possibility of moving.
Described metallized film comprises one deck explosion-proof metallized film layer.
Described metallized film comprises two layers of explosion-proof metallized film layer.
Described thin film dielectrics layer one end margin applies the zinc-aluminium thickened area coating that mixes, and an other end margin is provided with non-coating and stays limit C.
The metal layer edge thickening of metallized film also makes the metal layer particle better bonding with it, and equivalent series impedance reduces a lot, has effectively increased the anti-performance of shoving.
Described thickened area coating is positioned at an end of metal layer, is connected with copper strips behind thickened area coating end margin subregion metal spraying after metallized film rolls.
The up and down two interlayer non-centrosymmetry of described metallized film are provided with misalignment C.
During assembling, at first will weld the capacitor core of extraction electrode and put in the shell, next installs the cover plate encapsulation, then fills high-temp resisting high-humidity resisting epoxy resin encapsulated material by the fill orifice gradation on the cover plate, makes capacitor core and shell form an integral body.
The invention has the beneficial effects as follows: adopt mesh explosion-proof metallized film layer and apply thickened area coating at metal layer one end, realize that the condenser voltage rate of climb is high, high frequency performance is good, energy storage density is large, very high sensitivity self-healing is arranged and effectively isolate self-healing to puncture part by large electric current the time, avoided affecting other parts.Guaranteed the internal security quality of whole dry type explosion-prevention electric capacity.
During the electric weak point breakdown of common metal film, large value capacitor particularly, at this moment breakdown current is very large and can not control, in the self-healing process of being everlasting with the puncture of burning of the neighbouring multilayer dielectricity of self-healing point, cause the capacitor short-circuit inefficacy.Yet the reaction of the microfuze of metal metallized safety film is very sensitive, and self-healing is reliable.
The design makes the metallized film noinductive capacitor realize miniaturization structure, reduce the liquid leakage that mechanical explosion exists, the mechanical explosion failure rate, eliminate the capacitor core partial discharge phenomenon, have that self-healing is reliable, the release mechanism reliable in action, improved the useful life of electric capacity, when dry type mesh explosion-proof metallic film capacitor breakdown point increases simultaneously, capacitance reduce and tan δ without significant change, solved the safe energy storage prevent exploding of ordinary capacitor potential problem, have P2 level explosion-proof effect, can be used for the dry type column type noinductive capacitor of DC-LINK DC filtering.
Description of drawings
Fig. 1 is dry type mesh explosion-proof metallic film capacitor cross-sectional view of the present invention.
Fig. 2 is metallized film embodiment 1 profile that capacitor core of the present invention adopts.
Fig. 3 is metallized film embodiment 2 profiles that capacitor core of the present invention adopts.
Fig. 4 is explosion-proof metallized film layer structural representation.
Fig. 5 is E place enlarged diagram among Fig. 3.
Embodiment
For being illustrated more clearly in content of the present invention, be further described below in conjunction with the drawings and specific embodiments:
Embodiment 1:
Such as Fig. 1, Fig. 2, Fig. 4 and shown in Figure 5, dry type mesh explosion-proof metallic film capacitor, comprise capacitor case 3, cover plate 2, capacitor core 6, fuse extraction electrode 1, and the copper strips 5 that connects capacitor core 6 and electrode 1, be filled into the epoxy resin encapsulated material 4 of capacitor internal, capacitor core 6 is rolled by metallized film 7 and forms, metallized film 7 comprises polypropylene film dielectric layer 72 and is coated in metal layer 71 on the thin film dielectrics layer 72 by the zinc-aluminium that mixes, and metallized film 7 comprises two layers of explosion-proof metallized film layer 8; Explosion-proof metallized film layer 8 comprises polypropylene film dielectric layer 72 and is coated in metal layer A711 on the thin film dielectrics layer; Metal layer A711 reticulates structure and is divided into one by one conducting metal grid 81 by X-type without coating district 82.
Metal layer A711 diamondwise network structure, adjacent X-shaped is without being disconnected by conducting metal filament 83 between the coating district 82.
81 conducting metal filaments 83 that formed by the metal layer that applies of conducting metal grid connect.
Metal layer A711 is plated to one by one little conducting metal grid 81 with metal, and the metallization filament 83 that connects these little conducting metal grids 81.Because explosion-proof metallized film layer 8 is a kind of netted metalized films, conducting metal grid 81 is coupled together by conducting metal filament 83, conducting metal filament 83 just becomes anti-riot key structure, after the capacitor two ends add voltage, current i by electric capacity itself=j ω cv, when the electrode both end voltage increases for a certain reason, the electric current that flows through capacitor sharply increases with ω c amount doubly, the Joule heat that produces at conductive metallization filament 83 also sharply increases, and cause rapid rising of temperature consequently to blow conducting metal filament 83, cut off electric current, all generations are very fast, can effectively prevent the generation that capacitance short-circuit punctures, capacitor uses the mechanism of this Novel violence-proof structure to be actually anti-riot as fuse, not only safety but also quick reliable, anti-riot sensitiveer than the oil immersed type electric capacity of anti-riot structure, avoid occuring transient voltage when too high anti-riot structure not have the possibility of moving.
Metallized film comprises one deck explosion-proof metallized film layer 8.
Metallized film comprises two layers of explosion-proof metallized film layer 8.
Thin film dielectrics layer 72 1 end margin apply the zinc-aluminium thickened area coating 73 that mixes, and an other end margin is provided with non-coating and stays limit C.
The metal layer 71 of metallized film 7 and the thickening of metal layer A711 edge also make the metal layer particle better bonding with it, and equivalent series impedance reduces a lot, have effectively increased the anti-performance of shoving.
Thickened area coating 73 is positioned at the end of metal layer 71 and metal layer A711, is connected with copper strips 5 behind thickened area coating 73 end margin subregion metal sprayings after metallized film 7 rolls.
The up and down two-layer explosion-proof metallized film interlayer non-centrosymmetry of metallized film 7 is provided with misalignment C.
During assembling, at first will weld the capacitor core 6 of extraction electrode 1 and put in the shell 3; Next installs cover plate 2 encapsulation; Then fill high-temp resisting high-humidity resisting epoxy resin encapsulated material 4 by the fill orifice gradation on the cover plate, make capacitor core and shell form an integral body.Because hot and humid epoxy resin viscosity is high, constriction coefficient is little, and hot and humid epoxy resin and housing closely are sticked together, and capacitor is under the service conditions of 85 ℃ to-40 ℃ of high temperature, epoxy resin can not separate with housing, can not cause capacitor body to produce obscission.The capacitor core 6 that makes after the embedding forms an integral body with shell 3, add the good airproof performance of hot and humid epoxy resin, tight gapless between cover plate, shell, the capacitor core, when hot and humid dry-type capacitor moved under the condition of humidity 85%, the electrical property of capacitor can not produce any impact.
Embodiment 2:
As shown in Figure 3, embodiment 2 is with the difference of embodiment 1: embodiment 1 adopts two layers of explosion-proof genus thin layer 8, and embodiment 2 adopts one deck explosion-proof metallized film layer 8 and one deck common metal thin layer.Owing to having used in the double level metallization film of dry type mesh explosion-proof metallic film capacitor in the middle of one deck without the common metal thin layer of white space, increased metallic electrode over against area, thereby raw-material utilance is improved.
Above-described embodiment can not be thought limiting the scope of the invention, and change or improvement that those skilled in the art make based on technical scheme of the present invention or means are such as explosion-proof metallized film layer intermediately remained border; By the structural design of different metal thin layer, the internal series-connection of realization mesh explosion-proof metallized film layer and parallel connection etc. all should fall within the protection range of claim of the present invention.
Claims (8)
1. dry type mesh explosion-proof metallic film capacitor, comprise capacitor case, cover plate, capacitor core, fuse extraction electrode, and the copper strips that connects capacitor core and electrode, be filled into the epoxy resin encapsulated material of capacitor internal, capacitor core is rolled by metallized film and forms, metallized film comprises the polypropylene film dielectric layer and is coated in metal layer on the thin film dielectrics layer, and it is characterized in that: described metallized film comprises one deck and above explosion-proof metallized film layer thereof; The explosion-proof metallized film layer comprises the polypropylene film dielectric layer and is coated in metal layer A on the thin film dielectrics layer by the zinc-aluminium that mixes; Metal layer A reticulates structure and is slit into one by one conducting metal grid by X-type without the coating differentiation.
2. dry type mesh explosion-proof metallic film capacitor according to claim 1, it is characterized in that: described metal layer A diamondwise network structure, adjacent X-shaped is without disconnecting between the coating district.
3. dry type mesh explosion-proof metallic film capacitor according to claim 1 is characterized in that: the conducting metal filament connection that is formed by the metal layer that applies between described conducting metal grid.
4. dry type mesh explosion-proof metallic film capacitor according to claim 1, it is characterized in that: described metallized film comprises one deck explosion-proof metallized film layer.
5. dry type mesh explosion-proof metallic film capacitor according to claim 1, it is characterized in that: described metallized film comprises two layers of explosion-proof metallized film layer.
6. dry type mesh explosion-proof metallic film capacitor according to claim 1 is characterized in that: described thin film dielectrics layer one end margin applies the zinc-aluminium thickened area coating that mixes, and an other end margin is provided with non-coating and stays limit C.
7. dry type mesh explosion-proof metallic film capacitor according to claim 6, it is characterized in that: described thickened area coating is positioned at an end of metal layer, is connected with copper strips behind thickened area coating end margin subregion metal spraying after metallized film rolls.
8. dry type mesh explosion-proof metallic film capacitor according to claim 1 is characterized in that: the up and down two interlayer non-centrosymmetry of described metallized film are provided with misalignment C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220335580 CN202678110U (en) | 2012-07-11 | 2012-07-11 | Dry type netted explosion-proof metallization film capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220335580 CN202678110U (en) | 2012-07-11 | 2012-07-11 | Dry type netted explosion-proof metallization film capacitor |
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| CN202678110U true CN202678110U (en) | 2013-01-16 |
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| CN 201220335580 Expired - Fee Related CN202678110U (en) | 2012-07-11 | 2012-07-11 | Dry type netted explosion-proof metallization film capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428063A (en) * | 2015-11-18 | 2016-03-23 | 安徽航睿电子科技有限公司 | Netty anti-explosion gradual-change sheet resistance metalized safety film for capacitor |
| CN107275081A (en) * | 2017-07-25 | 2017-10-20 | 浙江七星电容器有限公司 | A kind of microminiature voltage regulation capacitor |
-
2012
- 2012-07-11 CN CN 201220335580 patent/CN202678110U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428063A (en) * | 2015-11-18 | 2016-03-23 | 安徽航睿电子科技有限公司 | Netty anti-explosion gradual-change sheet resistance metalized safety film for capacitor |
| CN107275081A (en) * | 2017-07-25 | 2017-10-20 | 浙江七星电容器有限公司 | A kind of microminiature voltage regulation capacitor |
| CN107275081B (en) * | 2017-07-25 | 2023-08-29 | 浙江七星电容器有限公司 | Microminiature voltage stabilizing capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDONG YIKE ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER NAME: FOSHAN EACO CAPACITOR CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528300, Guangdong District, Foshan City, Ronggui province Shunde Li neighborhood committee, 33 West Bao Chang Road, Tian Fu International Industrial City, three, four, four, 401, five, 501, 502 Patentee after: EACO CAPACITOR INC. Address before: 528300, Guangdong District, Foshan City, Shunde province Ronggui Li Fu Tian international industrial city three, four 401 Italy capacitor Co., Ltd. R & D department Patentee before: Foshan Eaco Capacitor Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20170711 |