CN210110541U - High-voltage direct-current supporting film capacitor - Google Patents
High-voltage direct-current supporting film capacitor Download PDFInfo
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- CN210110541U CN210110541U CN201920729585.9U CN201920729585U CN210110541U CN 210110541 U CN210110541 U CN 210110541U CN 201920729585 U CN201920729585 U CN 201920729585U CN 210110541 U CN210110541 U CN 210110541U
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Abstract
The utility model discloses a high voltage direct current supports film capacitor, including shell, electric capacity core and the terminal of connection at electric capacity core both ends, the shell adopts the PPS material to make, the electric capacity core is formed by the last metallized film of range upon range of each other and metallized film coiling down, it all comprises organic film and the metallic coating of coating by vaporization on organic film with metallized film down to go up metallized film, metallic coating is formed by magnesium aluminum alloy coating by vaporization, metallic coating comprises metal area and polar plate metal area entirely, the polar plate metal area is equipped with the polar plate unit that multistage equidistance interval set up, connects by the fuse between each polar plate unit, be close to the polar plate unit that entirely covers metal area one side also through the fuse with entirely cover the metal area and connect. The utility model discloses not only adopted the metallic film of taking multistage safety structure, but also adopted magnesium aluminum alloy as evaporating the metal, the casing material adopts the PPS material of higher moisture resistance to improve the security and the moisture resistance of condenser.
Description
Technical Field
The utility model relates to an electronic components field, in particular to high voltage direct current supports film capacitor.
Background
The film capacitor is one of capacitors, and is a capacitor with excellent performance, and has the following main characteristics: no polarity, high insulation resistance, excellent frequency characteristics (wide frequency response), and low dielectric loss. The thin film capacitor has small volume and large capacity, so the thin film capacitor has wider application, and can form different series products, such as high specific energy storage capacitors, anti-electromagnetic interference capacitors, anti-radiation capacitors, safe film capacitors, long-life capacitors, high-reliability capacitors, high-voltage full-film capacitors and the like.
The thin film capacitor is an important capacitor, and the application field thereof is not only applied to the general electronic technology field along with the development of the society. A large number of new application fields are continuously emerging along with social development, in particular in the fields of power electronics, novel energy, electric vehicles, electrified railways and smart grids, and film capacitors are irreplaceable in most cases.
However, the conventional thin film capacitor metal film has no safety structure, and the capacitor is exploded when receiving overvoltage or overcurrent, and is easily failed in a high humidity environment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a high voltage direct current and support film capacitor, not only adopted the metal film of taking multistage safety structure, but also adopted magnesium aluminum alloy as evaporating the metal, the casing material adopts the PPS material of higher moisture resistance to improve the security and the moisture resistance of condenser.
The utility model discloses a solve the technical scheme that its problem adopted and be:
the utility model provides a high voltage direct current supports film capacitor, includes shell, electric capacity core and connects the terminal at electric capacity core both ends, the shell adopts the PPS material to make, the electric capacity core is formed by last metallized film and metallized film coil down that range upon range of each other, go up metallized film and metallized film down and all constitute by organic film and the metallic coating of coating by vaporization on organic film, metallic coating is formed by magnesium aluminum alloy coating by vaporization, metallic coating comprises covering metal area and polar plate metal area entirely, the polar plate metal area is equipped with the polar plate unit that the multistage equidistance interval set up, is connected by the fuse between each polar plate unit, be close to the polar plate unit that covers metal area one side entirely also through the fuse with it connects to cover the metal area entirely.
Furthermore, the polar plate metal area is provided with five polar plate units which are arranged at equal intervals.
Further, the width of the fuse is between 0.01mm and 1 mm.
Further, the terminal is a patch type terminal or a lead.
Further, a gap between the housing and the condenser core is filled with a flame retardant resin.
Further, the organic film is a polypropylene film.
The utility model has the advantages that: the high-voltage direct-current supporting film capacitor adopts the metal film with the multi-section safety structure, so that the capacitance capacity can be gradually attenuated and cannot be directly damaged even if the capacitor is subjected to overvoltage, and the safety of the capacitor is improved; and the metal plating layer also adopts magnesium aluminum alloy as vapor plating metal, and the shell material adopts PPS material with higher moisture resistance, thereby improving the moisture resistance of the capacitor.
Drawings
Fig. 1 is a schematic diagram of an overall structure provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a metallized film according to an embodiment of the present invention;
reference numbers in the figures: 100-a housing; 200-capacitor core; 300-terminal; 400-organic thin film; 500-metal plating; 510-full metal-clad area; 520-plate metal region; 530-a plate unit; 540-fuse; 600-flame retardant resin.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1-2, the present invention provides a high voltage dc supported film capacitor, comprising a housing 100, the capacitor core 200 and the terminals 300 connected to two ends of the capacitor core 200, the housing 100 is made of PPS material, the capacitor core 200 is formed by winding an upper metalized film and a lower metalized film which are mutually laminated, the upper metalized film and the lower metalized film are both formed by an organic film 400 and a metal coating 500 evaporated on the organic film 400, the organic film 400 preferably adopts a polypropylene film, the metal coating 500 is formed by evaporation of magnesium-aluminum alloy, the metal coating 500 is formed by a full-coverage metal area 510 and a pole plate metal area 520, the pole plate metal area 520 is provided with a plurality of sections of pole plate units 530 arranged at equal intervals, the pole plate units 530 are connected by fuses 540, and the pole plate unit 530 close to one side of the full-coverage metal area 510 is also connected with the full-.
In this embodiment, when a certain plate unit 530 breaks down, the current of the plate unit 530 increases instantaneously, and the fuse 540 connected to the plate unit 530 is blown, so that the plate unit 530 is cut off from other plate units 530, and the damage does not spread to other plate units 530, and the other plate units 530 still maintain normal functions, so as to prevent the breakdown from continuing, and the capacitor recovers to normal. Even if a plurality of plate units 530 break down, the corresponding fuses 540 connected with the plate units can be blown out in succession by the same principle, the fault mode of the capacitor is changed into an open circuit mode, the possibility that the capacitor generates smoke or even fires can be greatly reduced, namely, the capacitor cannot be continuously broken down to generate heat and fail to fire, and the capacitor has instant self-healing performance and explosion-proof performance under the condition of breakdown. Moreover, since the plate metal region 520 is provided with a plurality of segments of plate units 530 arranged at equal intervals, i.e. corresponding to a multi-segment safety structure, the area of each plate unit 530 is relatively small, so that the capacity loss of the capacitor is small, and the operation of the capacitor is not affected basically.
Through the metal film with the multi-section type safety structure, even if the capacitor is subjected to overvoltage, the capacitance can be gradually attenuated without being directly damaged, and therefore the safety of the capacitor is improved. In addition, the metal plating layer 500 also adopts magnesium-aluminum alloy as the metal to be evaporated, when moisture enters into the capacitor and the moisture and the metal to be evaporated are subjected to oxidation reaction, the moisture is firstly subjected to oxidation reaction with more active magnesium metal, so that the aluminum metal is protected, and the moisture resistance of the capacitor is improved. Meanwhile, the casing 100 is made of PPS material with higher moisture resistance instead of the existing PBT material, wherein PBT has a melting point of 225 ℃, PPS has a thermal deformation temperature of 260 ℃ and a melting point of 290 ℃; the PBT is flame-retardant but can be slowly burned, and the PPS has excellent flame retardance and self-extinguishing property; the PBT has good formability but large forming shrinkage, and the PPS has small forming shrinkage and good dimensional stability, so that the service life of the capacitor is prolonged.
In order to realize a multi-section safety structure, the plate metal region 520 is provided with a plurality of sections of plate units 530 arranged at equal intervals, and the design range can be between 3 sections and 20 sections. In this embodiment, it is preferable that the plate metal region 520 is provided with five plate units 530 at equal intervals, so that a multi-stage safety structure can be realized, and the area of each plate unit 530 is not too small.
Preferably, the fuse 540 has a width of between 0.01mm and 1 mm. The width of the fuse 540 has an effect on the action of the fuse 540, i.e., the sensitivity to damaging voltages. In the present embodiment, the design range of the width of the fuse 540: 0.01mm-1mm, recommended value: 0.15mm-0.5 mm.
Preferably, the terminal 300 is a patch terminal 300 or a lead. The film capacitor adopts an electrode non-inductive leading-out mode, namely two terminals 300 are respectively led out from the left end face and the right end face of the capacitor core 200.
Preferably, the gap between the case 100 and the capacitor core 200 is filled with the flame retardant resin 600, and the flame retardant resin 600 can greatly reduce the flammability of the capacitor and make it self-extinguish after being ignited, thereby inhibiting the spread of flame, reducing the harm of smoke or toxic gas generated by combustion, and further improving the safety of the capacitor.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention defined by the appended claims.
Claims (6)
1. A high voltage DC support film capacitor, characterized in that: including shell, electric capacity core and the terminal of connection at electric capacity core both ends, the shell adopts the PPS material to make, the electric capacity core is formed by the last metallized film that stacks up each other and metallized film coil down, go up metallized film and metallized film down and all constitute by organic film and the metallic coating of coating by vaporization on organic film, the metallic coating is formed by magnesium aluminum alloy coating by vaporization, the metallic coating comprises covering metal area and polar plate metal area entirely, the polar plate metal area is equipped with the polar plate unit that the interval of multistage equidistance set up, connects by the fuse between each polar plate unit, be close to the polar plate unit that covers metal area one side entirely also through the fuse with it connects to cover the metal area entirely.
2. A high voltage dc supported film capacitor as claimed in claim 1, wherein: and the polar plate metal area is provided with five polar plate units which are arranged at equal intervals.
3. A high voltage dc supported film capacitor according to claim 1 or 2, wherein: the width of the fuse is between 0.01mm and 1 mm.
4. A high voltage dc supported film capacitor as claimed in claim 1, wherein: the terminal is a patch type terminal or a lead.
5. A high voltage dc supported film capacitor as claimed in claim 1, wherein: and the gap between the shell and the capacitor core is filled with flame-retardant resin.
6. A high voltage dc supported film capacitor as claimed in claim 1, wherein: the organic film is a polypropylene film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920729585.9U CN210110541U (en) | 2019-05-20 | 2019-05-20 | High-voltage direct-current supporting film capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920729585.9U CN210110541U (en) | 2019-05-20 | 2019-05-20 | High-voltage direct-current supporting film capacitor |
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| Publication Number | Publication Date |
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| CN210110541U true CN210110541U (en) | 2020-02-21 |
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| CN201920729585.9U Active CN210110541U (en) | 2019-05-20 | 2019-05-20 | High-voltage direct-current supporting film capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113948314A (en) * | 2021-10-28 | 2022-01-18 | 厦门法拉电子股份有限公司 | Thin film capacitor |
-
2019
- 2019-05-20 CN CN201920729585.9U patent/CN210110541U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113948314A (en) * | 2021-10-28 | 2022-01-18 | 厦门法拉电子股份有限公司 | Thin film capacitor |
| CN113948314B (en) * | 2021-10-28 | 2023-02-24 | 厦门法拉电子股份有限公司 | Thin film capacitor |
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