CN108597870A - A kind of moisture-proof film capacitor and preparation method thereof - Google Patents
A kind of moisture-proof film capacitor and preparation method thereof Download PDFInfo
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- CN108597870A CN108597870A CN201810522879.4A CN201810522879A CN108597870A CN 108597870 A CN108597870 A CN 108597870A CN 201810522879 A CN201810522879 A CN 201810522879A CN 108597870 A CN108597870 A CN 108597870A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000010408 film Substances 0.000 claims abstract description 94
- 239000002184 metal Substances 0.000 claims abstract description 81
- 229910052751 metal Inorganic materials 0.000 claims abstract description 81
- 239000011104 metalized film Substances 0.000 claims abstract description 28
- 238000007731 hot pressing Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000004593 Epoxy Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/003—Apparatus or processes for encapsulating capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention belongs to metallic film capacitor technical fields, and in particular to a kind of moisture-proof film capacitor and preparation method thereof.The moisture-proof film capacitor of the present invention 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 will not form string data structure, avoid on the influence of other characteristics of capacitor.And the low square resistance layer, which has, reduces the probability that corona effect generates, and 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 invention belongs to metallic film capacitor technical fields, and in particular to a kind of moisture-proof film capacitor and its preparation
Method.
Background technology
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 conditions of high temperature and 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.
Invention content
It is an object of the invention to：In view of the above problems, a kind of moisture-proof film capacitor is provided, device can be
It works under the conditions of high temperature and 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 by the present invention is：The invention discloses a kind of moisture-proof film capacitances
Device, including film roll, lead and the shell for protecting the film roll；The film roll has first end along its axis direction
Face and the second end face being oppositely arranged with the first end face；The film roll is provided with the first circle positioned at the first end face
Disk metal layer and the second disk metal layer positioned at the second end face；The lead is two, wherein lead
One end is placed in the shell and is electrically connected with the first disk metal layer, wherein one end of another lead is placed in institute
It states shell and is electrically connected with the second disk metal layer；The film roll includes the first metalized film and the second metallization
Film；First metalized film has the first insulating film, the first metal layer and the first low square resistance layer；First insulating film has
First face and the second face being oppositely arranged with first face；The first metal layer and the first low square resistance layer are set to institute
The first face is stated, there is preset space length between the first low square resistance layer and the first metal layer；The first low square resistance layer leans on
The nearly second end face, the first metal layer are electrically connected with the first disk metal layer；The second metalized film tool
There are the second insulating film, second metal layer and the second low square resistance layer；Second insulating film have third face and with the third face
The fourth face being oppositely arranged；The second metal layer and the second low square resistance layer are set to the third face, and described second is low
There is preset space length between sheet resistance layer and the second metal layer；The second low square resistance layer is described close to the first end face
Second metal layer is electrically connected with the second disk metal layer；The film roll is by first metalized film and described second
Metalized film dislocation is stacked and is wound, and the first low square resistance layer can be bonded with the fourth face, second low square resistance
Layer 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；Institute
The resistance value of the resistance value and the second low square resistance layer of stating the first low square resistance layer is 1.225-2.275 Ω/◇.
The present invention also provides a kind of preparation methods of moisture-proof film capacitor, include the following steps：
S1), stack and wind first metalized film and second metal film dislocation to form the film roll；
S2), the film roll is subjected to hot pressing, hot pressing temperature is 90-105 DEG C, hot pressing time 450-900s；It will pass through
The film roll of hot pressing is heat-treated, and heat treatment temperature is 110 DEG C, heat treatment time 4.5h；It will be through described in Overheating Treatment
Film roll is naturally cooling to room temperature；
S3), by step S2) first end face of the film roll that obtains after processing and the second end face spray respectively
Gold makes the first end face form the first disk metal layer, and the second end face is made to form the second disk metal layer；
S4), by step S3) the first disk metal layer of the film roll for obtaining after processing and second disk
Metal layer takes burr, and is respectively welded in the first disk metal layer of the film roll and the second disk metal layer
A piece lead；
S5), the film roll is fitted into epoxy shell, then resolidification obtains finished product to encapsulated epoxy resin.
By adopting the above-described technical solution, the beneficial effects of the invention are as follows：
Working condition of existing capacitor in the environment of high temperature and humidity is studied, finds that there are different receipts due to different materials
Shrinkage can cause 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 fat perfusion materia, moisture can more be immersed from this gap location inside capacitor body, most be started in high square resistance fringe region
Corona effect occurs.The moisture-proof film capacitor of the present invention increases a low square resistance metal layer on metalized film, when two gold
Categoryization film roll will not form string data structure, avoid other characteristics to capacitor around film roll, this low square resistance metal layer is formed
It influences.And the low square resistance layer have following 2 points of effects, 1. metallized film edge increase low square resistance layer, thickness of coating compared with
Thickness, being equivalent to same medium two sides has thicker metal, and after thermal finalization, marginal position is shaped, and consistency is good, and two metallize
Gap 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, two capacitors that are formed in situ of interior string will not both be caused to connect with metal layer, and reduce nominal capacity, and not
The effective area of capacitor is will increase, nominal capacity is increased, while the speed of corona diffusion can be effectively reduced.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 of the drawings
Fig. 1 is the structural schematic diagram of the moisture-proof film capacitor of the present invention；
Fig. 2 is the A-A cross-section diagrams of the moisture-proof film capacitor of the present invention；
Fig. 3 is that the dislocation of the first metalized film and the second metalized film of the present invention stacks figure；
Fig. 4 is the flow chart of the preparation method of the moisture-proof film capacitor of the present invention；
Reference numeral：
10- shells, 11- leads, the first metalized films of 12-, the first insulating films of 120-, the first faces 1200-, the first gold medals of 121-
Belong to layer, 122- the first low square resistance layers, the second metalized films of 13-, the second insulating films of 130-, 1300- thirds face, the second metals of 131-
Layer, 132- the second low square resistance layers, 14- film rolls, 140- the first disk metal layers, 141- the second disk metal layers.
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art with reference to specification text
Word can be implemented according to this.
As shown in Figure 1-Figure 3, the present invention provides a kind of moisture-proof film capacitors, including film roll 14, lead 11 and use
In the shell 10 for protecting the film roll 14；Shell 10 is epoxy package, and its shape is that cuboid is cyclic annular；The film
The second end face that volume 14 has first end face along its axis direction and is oppositely arranged with the first end face；The film roll 14 is set
It is equipped with the second disk metal layer 141 positioned at the first disk metal layer 140 of the first end face and positioned at the second end face；
The lead 11 be two, wherein one end of a lead 11 be placed in the shell 10 and with the first disk metal 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
It is electrically connected；The film roll 14 includes the first metalized film 12 and the second metalized film 13；First metalized film 12 has
There are the first insulating film 120, the first metal layer 121 and the first low square resistance layer 122；First insulating film 120 has the first face
1200 and the second face for being oppositely arranged with first face 1200；The first metal layer 121 and the first low square resistance layer 122
It is set to first face 1200, there is preset space length between the first low square resistance layer 122 and the first metal layer 121,
Namely 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 the second end
Face, the first metal layer 121 are electrically connected with the first disk metal layer 140；Second metalized film 13 has the
Two insulating films 130, second metal layer 131 and the second low square resistance layer 132；Second insulating film 130 has 1300 He of third face
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 set to
The third face 1300 has preset space length between the second low square resistance layer 132 and the second metal layer 131, that is,
Second low square resistance layer 132 is not connected to second metal layer 131；The second low square resistance layer 132 is described close to the first end face
Second metal layer 131 is electrically connected with the second disk metal layer 141；The film roll 14 is by first metalized film 12
It stacks and winds with second metalized film 13 dislocation, dislocation stacks as shown in figure 3, and low along first to being wound as
The length direction of the length direction of sheet resistance layer 122 or the second low square resistance layer 132 is wound so that the film roll 14 of winding is in cylinder
Shape, and the first low square resistance layer 122 and 132 equal spiral of the second low square resistance layer extend outwardly, the first low square resistance layer 122 can be with
The fourth face fitting, the second low square resistance layer 132 can be closed with second face paste.First insulating film 120 and second insulate
The material of film 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 1.225-2.275 Ω/◇, such as resistance value
Can be 1.75 Ω/◇.When such as Fig. 3 is placed, the height of the height and 121 highest point of the first metal layer of the first low square resistance layer 122
Unanimously, the height of the second low square resistance layer 132 and 131 highest point of second metal layer is highly consistent.
The preparation method of the moisture-proof film capacitor of the present embodiment 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 be through
The film roll 14 for crossing 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 is naturally cooling to room temperature, substantially eliminates the stress after hot pressing, and slow cooling makes its form stable；Then
By the first end face of the film roll 14 after Temperature fall and second end face into line mask, the ash to avoid workshop is also just covered
Dirt is attached to first end face or second end face.
S3), by step S2) first end face of the film roll 14 that obtains after processing and second end face difference
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 step S3) the first disk metal layer 140 of the film roll 14 for obtaining after 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
A 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 FC-500A-2/FC-500B-2 of the model Dongguan bliss Electronic Science and Technology Co., Ltd. production of oxygen resin；
S6), outer inspection, sorting are carried out, by batch checking and be packaged to be sale product to finished product.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (4)
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 be 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
It includes the first metalized film and the second metalized film to state film roll；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 and 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 close to the first end face, the second metal layer is electrically connected with the second disk metal layer；Institute
Film roll is stated to be 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 material component of the first low square resistance layer and
The material component of the second low square resistance layer includes zinc and aluminium.
3. moisture-proof film capacitor as claimed in claim 2, 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/◇.
4. the preparation method of moisture-proof film capacitor as described in any one of claims 1 to 3, which is characterized in that including following step
Suddenly：
S1), stack and wind first metalized film and second metal film dislocation to form the film roll；
S2), the film roll is subjected to hot pressing, hot pressing temperature is 90-105 DEG C, hot pressing time 450-900s；Hot pressing will be passed through
The film roll heat treatment, heat treatment temperature be 110 DEG C, heat treatment time 4.5h；By the film through Overheating Treatment
Volume is naturally cooling to room temperature；
S3), by step S2) first end face of the film roll that obtains after processing and second end face difference metal spraying,
So that the first end face is formed the first disk metal layer, the second end face is made to form the second disk metal layer；
S4), by step S3) the first disk metal layer of the film roll for obtaining after processing and the second disk metal
Layer takes burr, and is respectively welded one in the first disk metal layer of the film roll and the second disk metal layer
The lead；
S5), the film roll is fitted into epoxy shell, then resolidification obtains finished product to encapsulated epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522879.4A CN108597870B (en) | 2018-05-28 | 2018-05-28 | Dampproof film capacitor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522879.4A CN108597870B (en) | 2018-05-28 | 2018-05-28 | Dampproof film capacitor and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108597870A true CN108597870A (en) | 2018-09-28 |
| CN108597870B CN108597870B (en) | 2024-03-08 |
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| CN201810522879.4A Active CN108597870B (en) | 2018-05-28 | 2018-05-28 | Dampproof film capacitor and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111863446A (en) * | 2020-08-16 | 2020-10-30 | 南通新江海动力电子有限公司 | Metallized film for slowing down capacitance capacity loss in humid environment |
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|---|---|---|---|---|
| CN111863446A (en) * | 2020-08-16 | 2020-10-30 | 南通新江海动力电子有限公司 | Metallized film for slowing down capacitance capacity loss in humid environment |
| CN111863446B (en) * | 2020-08-16 | 2021-11-26 | 南通新江海动力电子有限公司 | Metallized film for slowing down capacitance capacity loss in humid environment |
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| CN108597870B (en) | 2024-03-08 |
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