CN204632589U - A kind of high stability thin-film capacitor - Google Patents
A kind of high stability thin-film capacitor Download PDFInfo
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- CN204632589U CN204632589U CN201520395340.9U CN201520395340U CN204632589U CN 204632589 U CN204632589 U CN 204632589U CN 201520395340 U CN201520395340 U CN 201520395340U CN 204632589 U CN204632589 U CN 204632589U
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Abstract
The utility model essentially discloses a kind of high stability thin-film capacitor, comprise capacitor core and metal pins, described capacitor core comprises battery lead plate and deielectric-coating, described capacitor core is 4 Rotating fields, be followed successively by battery lead plate, deielectric-coating, battery lead plate, deielectric-coating, the staggered superposition of two electrode plate, battery lead plate is two-sided metallization aluminium film, two-sided metallization aluminium film comprises aluminium foil and is just located at aluminium foil, the metalized film of reverse side, on described metal pins, cover has damping cotton, solve the problem that traditional small size thin-film capacitor cannot bear high electric current, and possess good resistance to shock.
Description
Technical field
The utility model relates to a kind of high stability thin-film capacitor.
Background technology
In multiple electronic component, the electronic component that capacitor is that use face is the widest, consumption is maximum, does not replace, they play a different role in circuit respectively.Capacitor is various in style, and its basic structure is identical with principle, and two-plate is made up of sheet metal, and spacing is very little, and centre is separated by dielectric, forms capacitor.From the differentiation of materials and structures, be three large major products with ceramic capacitor, electrolytic capacitor and organic film condenser.Film capacitor, owing to having the good characteristics such as capacity is large, impedance is low, stray inductance is little, loss is low, is the capacitor that a kind of performance is very excellent.Film capacitor has again a kind of metallized film autofrettage, namely on a plastic film with the very thin metal of vacuum evaporation last layer with as electrode, to save the thickness of electrode foil, reduce the volume of capacitor unit capacity, its great advantage is " self-healing " characteristic, namely metallic film capacitor possess to return to by the light of nature immediately after single electric weakness or partial breakdown puncture before the self-healing property function of electrical property.
Namely metallized film capacitor is replace metal forming as electrode in the surperficial evaporation layer of metal film of polyester film, because the thickness of layer of metallized film is much smaller than the thickness of metal forming, therefore after winding, volume is also much little than type metal foil type electric capacity volume.The great advantage of metalized film electric capacity is " self-healing " property.If so-called self-healing property is exactly, thin film dielectrics is owing to putting existing defects at certain and occur puncture short under overvoltage effect, and the metal layer of breakdown point can be formed in instant melting evaporation under arcing one very little of metal area, make two of electric capacity pole pieces mutually insulated and still working on again, therefore greatly improve the reliability of capacitor work.Though metallic film capacitor has above-mentioned huge advantage, but compared with type metal foil type electric capacity, also there is weakness: one is that capacity stability is not so good as foil type capacitor, this is because metallized capacitance easily occurs that under long-term work condition capacity is lost and capacity all can be caused to reduce after self-healing; Two is that tolerance big current ability is poor, and this is because layer of metallized film is much thinner than metal forming, and bearing great current ability is more weak; Three is physical stability shortcomings, because metallized film capacitor overall volume is little, does not generally do antivibration mount, so be not very desirable in physics vibration resistance especially.
Utility model content
The utility model technical issues that need to address are, provide a kind of high stability thin-film capacitor, solve the problem that traditional small size thin-film capacitor cannot bear high electric current, and possess good resistance to shock.
The technical solution of the utility model is: a kind of high stability thin-film capacitor, comprise capacitor core and metal pins, described capacitor core comprises battery lead plate and deielectric-coating, described capacitor core is 4 Rotating fields, be followed successively by battery lead plate, deielectric-coating, battery lead plate, deielectric-coating, the staggered superposition of two electrode plate, battery lead plate is two-sided metallization aluminium film, two-sided metallization aluminium film comprises plastic film and is located at the aluminium film of plastic film positive and negative, and on described metal pins, cover has damping cotton.
Preferably, described plastic film is fire resistant polypropylene film, and described deielectric-coating is polypropylene light film.
Preferably, the thickness of described battery lead plate is 0.7mm, and described polypropylene light film thickness is 0.9mm, and it is 0.1mm that two battery lead plates oppositely inside contract spacing.
Preferably, described metal pins outer wall scribbles refractory coating, and described damping cotton-padded covering is outside refractory coating.
Preferably, described capacitor core outside is provided with sealing wax layer, and sealing wax layer comprises interior sealing wax layer and outer sealing wax layer, is provided with epoxy resin layer between interior sealing wax layer and outer sealing wax layer.
Preferably, described capacitor core outside is provided with moulds box, moulds between box and capacitor core and is provided with epoxy resin layer.
After adopting technique scheme, the utility model tool has the following advantages:
Capacitor core in the utility model is improved to four layers by traditional three layers, five layers, battery lead plate is by using two-sided metallization aluminium film, namely all aluminium film is provided with at the positive and negative of plastic film, the thickness of battery lead plate is decreased from volume, but do not reduce in dielectric capacity, can not direct short-circuit under the impact of instant high-voltage big current, avoid high pressure arcing punch-through, improve the reliability of capacitor.Mutually wrong folded between two-layer two-sided metallization aluminium film, width is shortened for traditional interval set-up mode, make the spacing of metal pins can be reduced to less than 10 millimeters, separate with deielectric-coating between two-layer two-sided metallization aluminium film, bottom increases by a layer dielectric again, not only effectively prevent from being short-circuited between two battery lead plates, can also greatly improve and optimize the magnitude of current of metallic film capacitor.And cover has damping cotton on metal pins in the utility model, the part vibration being transferred to metal pins from electronics mainboard can be absorbed by damping cotton, and reduce the vibration of capacitor core part, thus improve the useful life of capacitor core, stability is better.
Accompanying drawing explanation
Accompanying drawing 1 is the internal structure schematic diagram of the utility model embodiment 1;
Accompanying drawing 2 is capacitor core external structure schematic diagram in embodiment 1;
Accompanying drawing 3 is capacitor core external structure schematic diagram in embodiment 2.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1 to Figure 2, a kind of high stability thin-film capacitor, comprise capacitor core and metal pins 3, described capacitor core comprises battery lead plate 1 and deielectric-coating 2, described capacitor core is 4 Rotating fields, be followed successively by battery lead plate, deielectric-coating, battery lead plate, deielectric-coating, the staggered superposition of two electrode plate, battery lead plate is two-sided metallization aluminium film, two-sided metallization aluminium film comprises plastic film 101 and is just located at plastic film, the aluminium film 102 of reverse side, capacitor core is by traditional three layers, five layers are improved to four layers, battery lead plate is by the structure with two-sided metallization aluminium film, namely all aluminium film is provided with at the positive and negative of plastic film, the thickness of battery lead plate is decreased from volume, but do not reduce in dielectric capacity, can not direct short-circuit under the impact of instant high-voltage big current, avoid high pressure arcing punch-through, improve the reliability of capacitor, mutually wrong folded between two-layer two-sided metallization aluminium film, width is shortened for traditional interval set-up mode, make the spacing of metal pins can be reduced to less than 10 millimeters, separate with deielectric-coating between two-layer two-sided metallization aluminium film, bottom increases by a layer dielectric again, not only effectively prevent from being short-circuited between two battery lead plates, can also greatly improve and optimize the magnitude of current of metallic film capacitor, on described metal pins, cover has damping cotton 301, the part vibration being transferred to metal pins from electronics mainboard can be absorbed by damping cotton, reduce the vibration of capacitor core part, thus improve the useful life of capacitor core, stability is better.
Described plastic film is fire resistant polypropylene film, described deielectric-coating is polypropylene light film, plastic film in the present embodiment is preferably the fire resistant polypropylene film of high frequency, the isotacticity of the raw material particle that the fire resistant polypropylene film of high frequency and normal temperature polypropylene screen use is different, the fire resistant polypropylene film of high frequency use isotacticity to be greater than the polypropylene particles of 98.5, and normal temperature film uses polypropylene particles isotacticity to be less than 96.5, that is raw-material purity is higher, the fire resistant polypropylene film of high frequency at the ability of opposing temperature and machine capability resistance to voltage in the case of a high temperature also just along with significantly improving, also just will be good than the temperature resistant capability of normal temperature polypropylene screen many, capacitor heatproof is made to bring up to+110 DEG C by original+85 DEG C, the rated voltage of capacitor is made to bring up to 1250V by original 1000V, proof voltage brings up to 2.5UR by original 1.6UR, under high temperature occasion, every index is all improved largely, thus also improve reliability and the useful life of product.Be applicable to, in the high AC and DC circuit of high-temperature high-frequency big current, power, be particularly suitable for the energy-conserving light source circuit of the electricity-saving lamp of high-voltage large current medium-high frequency occasion, LED.In addition, described metal pins outer wall scribbles refractory coating, a part can be reduced inner from delivered heat electronics mainboard to capacitor core, reduce the effect of expanding with heat and contract with cold of capacitor core inside, described damping cotton-padded covering is outside refractory coating, damping cotton can be glass fibre cotton, and damping cotton can be that two metal pins overlap one separately separately, also can be that two metal pins intert simultaneously and to amass on larger damping cotton at a block.
In order to make capacitor volume miniaturized further, establish for same linear interval between original capacitor two pieces of metal formings or plastic film, cause metal leg apart from excessive, common metal pin-pitch is at more than 15mm, make capacitor volume large, the scope of application is little, and two electrode plate stagger overlap in the present embodiment, and the thickness of described battery lead plate is 0.7mm, described polypropylene light film thickness is 0.9mm, it is 0.1mm that two battery lead plates oppositely inside contract spacing, the program is utilized to shorten overall width, the spacing of metal pins can be reduced to below 10mm, and improve withstand voltage.
As shown in Figure 2, in order to strengthen heat resistance of the present utility model, described capacitor core outside is provided with sealing wax layer, sealing wax layer comprises interior sealing wax layer 41 and outer sealing wax layer 42, epoxy resin layer 5 is provided with between interior sealing wax layer and outer sealing wax layer, wax layer possesses resistant to elevated temperatures characteristic, the structure of double-deck sealing wax layer has increased considerably high-temperature stability, and pressed from both sides one deck epoxy resin layer between two-layer sealing wax layer, epoxy resin layer stability is high, possesses good flame retardant effect, double-deck sealing wax layer is coordinated well to protect capacitor core, utilize this structure, general without outer cover electric appliance casing.
As shown in Figure 3; for another kind of embodiment; the difference of this embodiment and the first embodiment is that capacitor core external protective structures is different; sealing wax layer is not had unlike in this embodiment with embodiment; the substitute is aesthetic appearance relatively unified mould box 6; mould between box and capacitor core and be provided with epoxy resin layer 5; heat-resisting quantity is short of to some extent than embodiment 1; but add in outward appearance uniformity; and vibration resistance adds than embodiment 1, compare that to be useful in some temperature be not under very high operational environment.
Below only with regard to the utility model preferably example be described, but can not be interpreted as it is limitations on claims.The utility model not only limits to and above example, its concrete structure allows to change, those skilled in the art can make various change and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the scope that the utility model claims define.
Claims (6)
1. a high stability thin-film capacitor, comprise capacitor core and metal pins (3), described capacitor core comprises battery lead plate (1) and deielectric-coating (2), it is characterized in that: described capacitor core is 4 Rotating fields, be followed successively by battery lead plate, deielectric-coating, battery lead plate, deielectric-coating, the staggered superposition of two electrode plate, battery lead plate is two-sided metallization aluminium film, two-sided metallization aluminium film comprises plastic film (101) and is located at the aluminium film (102) of plastic film positive and negative, and on described metal pins, cover has damping cotton (301).
2. a kind of high stability thin-film capacitor according to claim 1, is characterized in that: described plastic film is fire resistant polypropylene film, described deielectric-coating is polypropylene light film.
3. a kind of high stability thin-film capacitor according to claim 2, is characterized in that: the thickness of described battery lead plate is 0.7mm, and described polypropylene light film thickness is 0.9mm, and it is 0.1mm that two battery lead plates oppositely inside contract spacing.
4. a kind of high stability thin-film capacitor according to claim 1, it is characterized in that: described metal pins outer wall scribbles refractory coating, described damping cotton-padded covering is outside refractory coating.
5. a kind of high stability thin-film capacitor according to Claims 1-4 any one, it is characterized in that: described capacitor core outside is provided with sealing wax layer, sealing wax layer comprises interior sealing wax layer (41) and outer sealing wax layer (42), is provided with epoxy resin layer (5) between interior sealing wax layer and outer sealing wax layer.
6. a kind of high stability thin-film capacitor according to Claims 1-4 any one, is characterized in that: described capacitor core outside is provided with moulds box (6), moulds between box and capacitor core and is provided with epoxy resin layer (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520395340.9U CN204632589U (en) | 2015-06-09 | 2015-06-09 | A kind of high stability thin-film capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520395340.9U CN204632589U (en) | 2015-06-09 | 2015-06-09 | A kind of high stability thin-film capacitor |
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| CN204632589U true CN204632589U (en) | 2015-09-09 |
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| CN201520395340.9U Expired - Fee Related CN204632589U (en) | 2015-06-09 | 2015-06-09 | A kind of high stability thin-film capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934222A (en) * | 2015-06-09 | 2015-09-23 | 长兴友畅电子有限公司 | Highly-stable film capacitor |
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2015
- 2015-06-09 CN CN201520395340.9U patent/CN204632589U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934222A (en) * | 2015-06-09 | 2015-09-23 | 长兴友畅电子有限公司 | Highly-stable film capacitor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20170609 |
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| CF01 | Termination of patent right due to non-payment of annual fee |