CN208478151U - A kind of moisture-proof film capacitor - Google Patents
A kind of moisture-proof film capacitor Download PDFInfo
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- CN208478151U CN208478151U CN201820801457.6U CN201820801457U CN208478151U CN 208478151 U CN208478151 U CN 208478151U CN 201820801457 U CN201820801457 U CN 201820801457U CN 208478151 U CN208478151 U CN 208478151U
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Abstract
The utility model belongs to metallic film capacitor technical field, and in particular to a kind of moisture-proof film capacitor.The moisture-proof film capacitor of the utility model increases a low square resistance metal layer on metalized film, and when two metallizing film windings form film roll, this low square resistance metal layer not will form string data structure, avoids on the influence of other characteristics of capacitor.And the low square resistance layer, which has, reduces the probability that corona effect generates, to reduce the risk for generating corona effect, while can effectively reduce the speed of corona diffusion.Therefore low square resistance layer plays the role of obstructing moisture, while reducing the delivery rate of moisture, ensure that the service life of capacitor.
Description
Technical field
The utility model belongs to metallic film capacitor technical field, and in particular to a kind of moisture-proof film capacitor.
Background technique
After finishing assembly, film roll can be completely covered capacitor by epoxy resin, while outside uses inflaming retarding shell
Moisture-proof role can be played.But existing capacitor works under the condition of high temperature and high humidity, moisture can enter in shell, to immerse
Inside capacitor body and corona effect occurs, as capacitor works, corona effect constantly occurs, and eventually results in capacitor
Capacity attenuation seriously affects service life.
Utility model content
The purpose of this utility model is that: in view of the above problems, provide a kind of moisture-proof film capacitor, device energy
It is enough to work under the condition of high temperature and high humidity, and moisture is difficult to immerse inside capacitor body, maintains the ordinary life of capacitor.
To achieve the goals above, the technical solution adopted in the utility model are as follows: the utility model discloses a kind of moisture-proof
Thin film capacitor, including film roll, lead and shell for protecting the film roll；The film roll has along its axis direction
The second end face for having first end face and being oppositely arranged with the first end face；The film roll is provided with positioned at the first end face
The first disk metal layer and the second disk metal layer positioned at the second end face；The lead is two, wherein an institute
The one end for stating lead is placed in the shell and is electrically connected with the first disk metal layer, wherein the one of another lead
End is placed in the shell and is electrically connected with the second disk metal layer；The film roll includes the first metalized film and second
Metalized film；First metalized film has the first insulating film, the first metal layer and the first low square resistance layer；First insulation
The second face that film has the first face and is oppositely arranged with first face；The first metal layer and the first low square resistance layer are equal
Set on first face, there is preset space length between the first low square resistance layer and the first metal layer；The first low side
Resistance layer is electrically connected close to the second end face, the first metal layer and the first disk metal layer；Second metal
Changing film has the second insulating film, second metal layer and the second low square resistance layer；Second insulating film have third face and with it is described
The fourth face that third face is oppositely arranged；The second metal layer and the second low square resistance layer are set to the third face, described
There is preset space length between second low square resistance layer and the second metal layer；The second low square resistance layer is close to the first end
Face, the second metal layer and the second disk metal layer are electrically connected；The film roll by first metalized film and
Second metalized film dislocation is stacked and is wound, and the first low square resistance layer can be bonded with the fourth face, and described the
Two low square resistance layers can be closed with second face paste.
Further, the material component of the material component of the first low square resistance layer and the second low square resistance layer includes
Zinc and aluminium.
Further, the width of the width of the first low square resistance layer and the second low square resistance layer is 1-1.5mm；
The resistance value of the first low square resistance layer and the resistance value of the second low square resistance layer are 1.225-2.275 Ω/.
By adopting the above-described technical solution, the beneficial effects of the utility model are:
Working condition of existing capacitor in the environment of high temperature and humidity is studied, discovery has different receipts due to different materials
Shrinkage will lead to generate gap between different materials under high temperature environment, in the capacitor, especially metal lead-outs and asphalt mixtures modified by epoxy resin
Between rouge perfusion materia, moisture can more immerse inside capacitor body from this gap location, most start in high square resistance fringe region
Corona effect occurs.The moisture-proof film capacitor of the utility model increases a low square resistance metal layer on metalized film, when two
It opens metallizing film winding and forms film roll, this low square resistance metal layer not will form string data structure, avoid to the other of capacitor
Characteristic influences.And the low square resistance layer has following two o'clock effect, and 1. metallized film edge increases low square resistance layer, thickness of coating
Thicker, being equivalent to same medium two sides has thicker metal, and after thermal finalization, marginal position sizing consistency is good, two metals
The gap changed between film is small, reduces the probability that corona effect generates, to reduce the risk for generating corona effect；2. the low square resistance
Layer because coating is thicker, connect by two capacitors that are formed in situ that neither will cause interior string with metal layer, reduces nominal capacity, again
It not will increase the effective area of capacitor, increase nominal capacity, while the speed of corona diffusion can be effectively reduced.Therefore low side
Resistance layer plays the role of obstructing moisture, while reducing the delivery rate of moisture, ensure that the service life of capacitor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the moisture-proof film capacitor of the utility model；
Fig. 2 is the A-A cross-section diagram of the moisture-proof film capacitor of the utility model；
Fig. 3 is that the dislocation of first metalized film and the second metalized film of the utility model stacks figure；
Fig. 4 is the flow chart of the preparation method of the moisture-proof film capacitor of the utility model；
Appended drawing reference:
10- shell, 11- lead, the first metalized film of 12-, the first insulating film of 120-, the first face 1200-, 121- first
Metal layer, 122- the first low square resistance layer, the second metalized film of 13-, the second insulating film of 130-, 1300- third face, 131- second
Metal layer, 132- the second low square resistance layer, 14- film roll, 140- the first disk metal layer, 141- the second disk metal layer.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
As shown in Figure 1-Figure 3, the utility model provides a kind of moisture-proof film capacitor, including film roll 14, lead 11
With for protecting the shell 10 of the film roll 14；Shell 10 is epoxy package, and its shape is that cuboid is cyclic annular；It is described
The second end face that film roll 14 has first end face along its axis direction and is oppositely arranged with the first end face；The film roll
14 are provided with the first disk metal layer 140 positioned at the first end face and the second disk metal layer positioned at the second end face
141；The lead 11 is two, wherein one end of a lead 11 be placed in the shell 10 and with first disk gold
Belong to layer 140 be electrically connected, wherein one end of another lead 11 be placed in the shell 10 and with the second disk metal
Layer 141 is electrically connected；The film roll 14 includes the first metalized film 12 and the second metalized film 13；First metalized film
12 have the first insulating film 120, the first metal layer 121 and the first low square resistance layer 122；First insulating film 120 has first
Face 1200 and the second face being oppositely arranged with first face 1200；The first metal layer 121 and the first low square resistance layer
122 are set to first face 1200, have between making a reservation between the first low square resistance layer 122 and the first metal layer 121
Away from, that is, the first low square resistance layer 122 is not connected to the first metal layer 121；The first low square resistance layer 122 is close to described second
End face, the first metal layer 121 are electrically connected with the first disk metal layer 140；Second metalized film 13 has
Second insulating film 130, second metal layer 131 and the second low square resistance layer 132；Second insulating film 130 has third face 1300
With the fourth face being oppositely arranged with the third face 1300；The second metal layer 131 and the second low square resistance layer 132 are all provided with
There is preset space length between the third face 1300, the second low square resistance layer 132 and the second metal layer 131, also
It is that the second low square resistance layer 132 is not connected to second metal layer 131；The second low square resistance layer 132 is close to the first end face, institute
It states second metal layer 131 and the second disk metal layer 141 is electrically connected；The film roll 14 is by first metalized film
12 and second metalized film 13 dislocation stack and wind, dislocation stacks as shown in figure 3, and to being wound as along first
The length direction of the length direction of low square resistance layer 122 or the second low square resistance layer 132 winding, so that the film roll 14 of winding is in circle
Column, and the first low square resistance layer 122 and the equal spiral of the second low square resistance layer 132 extend outwardly, and the first low square resistance layer 122 can
It is bonded with the fourth face, the second low square resistance layer 132 can be closed with second face paste.First insulating film 120 and second is exhausted
The material of velum 130 is polyester film.
The material component of the material component of the first low square resistance layer 122 and the second low square resistance layer 132 includes zinc
With aluminium.Film roll 14 can be chemically reacted with moisture, have the function that dehumidifying.
The width of the width of the first low square resistance layer 122 and the second low square resistance layer 132 is 1-1.5mm；It is described
The resistance value of first low square resistance layer 122 and the resistance value of the second low square resistance layer 132 are 1.225 Ω -2.275 Ω/, such as are hindered
Value can be 1.75 Ω/.When such as Fig. 3 is placed, the height of the first low square resistance layer 122 and the height of 121 highest point of the first metal layer
Degree is consistent, and the height of the second low square resistance layer 132 is consistent with the height of 131 highest point of second metal layer.
The moisture-proof film capacitor of the present embodiment the preparation method is as follows:
), S1 the first metal layer 121 and the first low square resistance layer 122 is deposited on the first insulating film 120 and obtains the first metal
Change film 12, second metal layer 131 and the second low square resistance layer 132 is deposited on the second insulating film 130 and obtains the second metalized film
13；It stacks and winds first metalized film 12 and second metal film dislocation to form the film roll 14；
S2), the film roll 14 is subjected to hot pressing, hot pressing temperature is 90-105 DEG C, hot pressing time 450-900s；It will
The film roll 14 by hot pressing is heat-treated, and heat treatment temperature is 110 DEG C, heat treatment time 4.5h；It will be through Overheating Treatment
The film roll 14 be naturally cooling to room temperature, the stress after substantially eliminating hot pressing, and slow cooling makes its form stable；So
The first end face of the film roll 14 after Temperature fall and second end face are subjected to exposure mask afterwards, also just covered to avoid workshop
Dust is attached to first end face or second end face.
S3), the first end face of the film roll 14 obtained after step S2) processing and the second end face are distinguished
Metal spraying makes the first end face form the first disk metal layer 140, and the second end face is made to form the second disk metal layer 141；
S4), by the first disk metal layer 140 of the film roll 14 obtained after step S3) processing and described the
Two disk metal layers 141 take burr, and in the first disk metal layer 140 of the film roll 14 and second disk
The lead 11 is respectively welded in metal layer 141；The material of lead 11 is tinning steel-in-copper；
S5), the film roll 14 is fitted into epoxy shell, then resolidification obtains finished product to encapsulated epoxy resin；Ring
The epoxy resin of the model Dongguan bliss Electronic Science and Technology Co., Ltd. production FC-500A-2/FC-500B-2 of oxygen resin；
S6), outer inspection, sorting are carried out, by batch checking and be packaged to be sale product to finished product.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (2)
1. a kind of moisture-proof film capacitor, which is characterized in that including film roll, lead and for protecting the outer of the film roll
Shell；The second end face that the film roll has first end face along its axis direction and is oppositely arranged with the first end face；It is described
Film roll is provided with the first disk metal layer positioned at the first end face and the second disk metal positioned at the second end face
Layer；The lead is two, wherein one end of a lead be placed in the shell and with the first disk metal layer electricity
Property connection, wherein one end of another lead be placed in the shell and with the second disk metal layer be electrically connected；Institute
Stating film roll includes the first metalized film and the second metalized film；First metalized film has the first insulating film, the first gold medal
Belong to layer and the first low square resistance layer；The second face that first insulating film has the first face and is oppositely arranged with first face；Institute
It states the first metal layer and the first low square resistance layer is set to first face, the first low square resistance layer and first metal
There is preset space length between layer；The first low square resistance layer is close to the second end face, the first metal layer and described first
Disk metal layer is electrically connected；Second metalized film has the second insulating film, second metal layer and the second low square resistance layer；Institute
The second insulating film is stated with third face and the fourth face being oppositely arranged with the third face；The second metal layer and described second
Low square resistance layer is set to the third face, has preset space length between the second low square resistance layer and the second metal layer；Institute
The second low square resistance layer is stated to be electrically connected close to the first end face, the second metal layer and the second disk metal layer；Institute
It states film roll and is stacked and wound, first low square resistance by first metalized film and second metalized film dislocation
Layer can be bonded with the fourth face, and the second low square resistance layer can be closed with second face paste.
2. moisture-proof film capacitor as described in claim 1, which is characterized in that the width of the first low square resistance layer and described
The width of second low square resistance layer is 1-1.5mm；The resistance value of the resistance value of the first low square resistance layer and the second low square resistance layer
It is 1.225-2.275 Ω/.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820801457.6U CN208478151U (en) | 2018-05-28 | 2018-05-28 | A kind of moisture-proof film capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820801457.6U CN208478151U (en) | 2018-05-28 | 2018-05-28 | A kind of moisture-proof film capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208478151U true CN208478151U (en) | 2019-02-05 |
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ID=65219153
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820801457.6U Active CN208478151U (en) | 2018-05-28 | 2018-05-28 | A kind of moisture-proof film capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597870A (en) * | 2018-05-28 | 2018-09-28 | 四川中星电子有限责任公司 | A kind of moisture-proof film capacitor and preparation method thereof |
-
2018
- 2018-05-28 CN CN201820801457.6U patent/CN208478151U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597870A (en) * | 2018-05-28 | 2018-09-28 | 四川中星电子有限责任公司 | A kind of moisture-proof film capacitor and preparation method thereof |
| CN108597870B (en) * | 2018-05-28 | 2024-03-08 | 四川中星电子有限责任公司 | Dampproof film capacitor and preparation method thereof |
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