CN103680953A - Metallized polyester film cassette-type direct current capacitor - Google Patents
Metallized polyester film cassette-type direct current capacitor Download PDFInfo
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- CN103680953A CN103680953A CN201310577582.5A CN201310577582A CN103680953A CN 103680953 A CN103680953 A CN 103680953A CN 201310577582 A CN201310577582 A CN 201310577582A CN 103680953 A CN103680953 A CN 103680953A
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Abstract
The invention discloses a metallized polyester film cassette-type direct current capacitor, which includes a high-temperature-resistant plastic shell, a capacitor core, two wires and an epoxy resin sealing material; the capacitor core is arranged in the high-temperature-resistant flame-retardant shell; the epoxy resin sealing material is filled in the high-temperature-resistant flame-retardant shell; the capacitor core is made by winding of a metallized polycarbonate film which is respectively used for a dielectric and an electrode; the metallized polycarbonate film includes a polycarbonate film base layer and a metal zinc aluminum alloy layer which is evaporated on the polycarbonate film base layer; and the thickness of the metal zinc aluminum alloy layer evaporated on the polycarbonate film base layer is 3 to 5 mu m. With the above method, the capacitor of the invention is stable in capacity, can withstand the high current, and has the characteristics of high reliability and good self-healing performance.
Description
Technical field
The present invention relates to electronic devices and components field, particularly relate to a kind of metallized polyester bellows-type direct current capacitor.
Background technology
Metallized film capacitor is that the surperficial evaporation layer of metal film at polyester film replaces metal forming as electrode because the thickness of layer of metallized film much smaller than the thickness of metal forming, therefore reel after volume also little a lot of than type metal foil type electric capacity volume.The great advantage of metalized film electric capacity is " self-healing " characteristic.If so-called self-healing feature is exactly, thin film dielectrics is owing to having defect and occur puncture short under overvoltage effect at certain point, and the metal layer of breakdown point can form in instant melting evaporation under arcing one very little of metal area, two pole pieces that make electric capacity are mutually insulated and still working on again, has therefore greatly improved the reliability of capacitor work.From principle, analyzing, should not there is not the pattern of short-circuit failure in metallized film capacitor, and type metal foil type capacitor there will be the phenomenon of a lot of short-circuit failures.Though metallic film capacitor has above-mentioned huge advantage, but compare with type metal foil type electric capacity, also there are two shortcomings: capacity stability is poor with the large current capacity of tolerance not as foil type capacitor, show that after deliberation the thickness of increase metallization coating can be avoided above shortcoming.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of metallized polyester bellows-type direct current capacitor, increase the thickness of metallization zinc aluminum alloy coating, this condenser capacity stablized and there is the large current capacity of tolerance, thering is the feature that reliability is high, self-healing property is good simultaneously.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of metallized polyester bellows-type direct current capacitor is provided, comprise high-temperature resistance plastice shell, capacitor core, article two, lead-in wire and epoxy encapsulation material, described capacitor core is contained in described heat-resistant fireproof shell, described epoxy encapsulation material is filled in described heat-resistant fireproof shell, described capacitor core is done dielectric medium and electrode roll around forming by the polycarbonate membrane that metallizes, described metallization polycarbonate membrane comprises polycarbonate membrane basic unit and the evaporation metallic zinc aluminium alloy layer in polycarbonate membrane basic unit, and the metallic zinc aluminium alloy layer thickness of described evaporation in polycarbonate membrane basic unit is 3-5 μ m.
In a preferred embodiment of the present invention, described lead-in wire adopts CP wire.
In a preferred embodiment of the present invention, described high-temperature resistance plastice shell is oblong-shaped, and material is PBT high-temperature resistance plastice.
The invention has the beneficial effects as follows: capacitor core is done dielectric medium and electrode roll around forming by the polycarbonate membrane that metallizes, wherein metallize polycarbonate membrane by polycarbonate membrane basic unit and evaporation metallic zinc aluminium alloy layer in polycarbonate membrane basic unit, and the thickness of metallic zinc aluminium alloy layer is 3-5 μ m, make this condenser capacity stable and there is the large current capacity of tolerance; Lead-in wire adopts CP wire, has good solderability; Adopt PBT high-temperature resistance plastice to do shell, and filling epoxy resin encapsulating compound, make electric capacity good reliability, moisture-proof, high temperature resistant, and can extend the useful life of electric capacity.
Accompanying drawing explanation
Fig. 1 is the structural representation of metallized polyester bellows-type direct current capacitor of the present invention one preferred embodiment;
Metallize shown in the being structural representation of polycarbonate membrane one preferred embodiment of Fig. 2;
In accompanying drawing, the mark of each parts is as follows: 1, high-temperature resistance plastice shell, 2, capacitor core, 3, lead-in wire, 4, epoxy encapsulation material, 20, polycarbonate membrane basic unit, 21, metallic zinc aluminium alloy layer.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to Fig. 1 and Fig. 2, the embodiment of the present invention comprises:
A kind of metallized polyester bellows-type direct current capacitor, comprise high-temperature resistance plastice shell 1, capacitor core 2, article two, lead-in wire 3 and epoxy encapsulation material 4, described capacitor core 2 is contained in described heat-resistant fireproof shell 1, described epoxy encapsulation material 4 is filled in described heat-resistant fireproof shell 1, described capacitor core 2 is done dielectric medium and electrode roll around forming by metallization polycarbonate membrane, described metallization polycarbonate membrane comprises polycarbonate membrane basic unit 20 and the evaporation metallic zinc aluminium alloy layer 21 in polycarbonate membrane basic unit, and the thickness of the metallic zinc aluminium alloy layer 21 of described evaporation in polycarbonate membrane basic unit is 3-5 μ m.
Wherein, described lead-in wire 3 adopts CP wire.
Described high-temperature resistance plastice shell 1 is oblong-shaped, and material is PBT high-temperature resistance plastice.
The present invention has disclosed a kind of metallized polyester bellows-type direct current capacitor, capacitor core is done dielectric medium and electrode roll around forming by the polycarbonate membrane that metallizes, wherein metallize polycarbonate membrane by polycarbonate membrane basic unit and evaporation metallic zinc aluminium alloy layer in polycarbonate membrane basic unit, and the thickness of metallic zinc aluminium alloy layer is 3-5 μ m, make this condenser capacity stable and there is the large current capacity of tolerance; Lead-in wire adopts CP wire, has good solderability; Adopt PBT high-temperature resistance plastice to do shell, and filling epoxy resin encapsulating compound, make electric capacity good reliability, moisture-proof, high temperature resistant, and can extend the useful life of electric capacity.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. a metallized polyester bellows-type direct current capacitor, it is characterized in that, comprise high-temperature resistance plastice shell, capacitor core, article two, lead-in wire and epoxy encapsulation material, described capacitor core is contained in described heat-resistant fireproof shell, described epoxy encapsulation material is filled in described heat-resistant fireproof shell, described capacitor core is done dielectric medium and electrode roll around forming by the polycarbonate membrane that metallizes, described metallization polycarbonate membrane comprises polycarbonate membrane basic unit and the evaporation metallic zinc aluminium alloy layer in polycarbonate membrane basic unit, and the metallic zinc aluminium alloy layer thickness of described evaporation in polycarbonate membrane basic unit is 3-5 μ m.
2. metallized polyester bellows-type direct current capacitor according to claim 1, is characterized in that, described lead-in wire adopts CP wire.
3. metallized polyester bellows-type direct current capacitor according to claim 1, is characterized in that, described high-temperature resistance plastice shell is oblong-shaped, and material is PBT high-temperature resistance plastice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577582.5A CN103680953A (en) | 2013-11-19 | 2013-11-19 | Metallized polyester film cassette-type direct current capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577582.5A CN103680953A (en) | 2013-11-19 | 2013-11-19 | Metallized polyester film cassette-type direct current capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103680953A true CN103680953A (en) | 2014-03-26 |
Family
ID=50318219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310577582.5A Pending CN103680953A (en) | 2013-11-19 | 2013-11-19 | Metallized polyester film cassette-type direct current capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103680953A (en) |
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2013
- 2013-11-19 CN CN201310577582.5A patent/CN103680953A/en active Pending
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |
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| WD01 | Invention patent application deemed withdrawn after publication |