CN206726958U - Thin film capacitor and its capacitor core - Google Patents
Thin film capacitor and its capacitor core Download PDFInfo
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- CN206726958U CN206726958U CN201720259686.5U CN201720259686U CN206726958U CN 206726958 U CN206726958 U CN 206726958U CN 201720259686 U CN201720259686 U CN 201720259686U CN 206726958 U CN206726958 U CN 206726958U
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Abstract
The utility model discloses a kind of capacitor core of thin film capacitor, the capacitor core is wound by two metallized film layers poststacks and formed, each metallized film includes basement membrane and formed in the epilamellar coat of metal respectively, the edge of basement membrane one is beyond the coat of metal formed with staying edge, the coat of metal includes plated base and formed in the thickening part of the basement membrane other edge, the plated base is fine aluminium material, the thickening part is allumen material, two metallized film mutually in reversely and stagger setting cause one of two metallized film stay edge to be exceeded by another thickening part of two metallized film.Compared with prior art, the plated base uses fine aluminium material, and in the thin film capacitor long-term work under damp and hot severe rugged environment, the coat of metal can still keep stability, while also improve the dielectric field intensity of the thin film capacitor.
Description
Technical field
It the utility model is related to capacitor area, more particularly to a kind of apply for PFC active filterings and DC-link
Thin film capacitor.
Background technology
At present, the DC-link of the direct current active filtering and new energy inverter etc. in power electronics PFC loops is applied
The product volume of thin film capacitor is smaller, the defects of unfavorable installation be present.Moreover, there is high frequency equivalent string in the thin film capacitor
It is larger to join resistance (ESR), the scarce capacity in terms of high frequency tolerant ripple current so that the thin film capacitor long-term work is in harshness
Hidden danger be present in the reliability under the conditions of environment and large ripple current.Because, it is necessary to a kind of thin film capacitor is provided, having improves
High frequency tolerant ripple current ability.
Utility model content
The purpose of this utility model is to provide a kind of thin film capacitor and its capacitor core have improved high frequency tolerant line
The ability of ripple electric current.
To achieve these goals, the capacitor core of the utility model thin film capacitor is rolled up by two metallized film layers poststacks
Around formation, each metallized film includes basement membrane and formed in the epilamellar coat of metal, the basement membrane one respectively
Beyond the coat of metal formed with edge is stayed, the coat of metal includes plated base and formed another in the basement membrane at edge
The thickening part at edge, the plated base are fine aluminium material, and the thickening part is allumen material, two metallized film
Mutually in reversely and stagger setting cause one of two metallized film stay edge by the another of two metallized film
Thickening part exceed.
Compared with prior art, the plated base uses fine aluminium material, is effectively utilized the chemical characteristic of aluminum metal not
Ripple living, in the thin film capacitor long-term work under damp and hot severe rugged environment, the coat of metal can still keep stability, together
When also improve the dielectric field intensity of the thin film capacitor, in the resistance to pressure of identical, the thin film capacitor can use thinner
Dielectric thickness, reduce volume and material cost.By using the design of the thickening part, the capacitance core is effectively increased
Sub and effective contact area of the spray-welding coating, the ability of the anti-pulse current impact of the thin film capacitor is improved, it is described
Thin film capacitor has more excellent conveyance capacity.
It is preferred that the material of the basement membrane is polypropylene film, so as to may achieve resistant to elevated temperatures effect.
It is preferred that the thickening part edge formed using Wave-cut technique it is wavy, by wavy design, effectively
The contact area and adhesive force of the capacitor core and the spray-welding coating are added, reduces the capacitor core and the surfacing
The contact sheet resistance of layer, improve the ability of the resistance to rush of current of the thin film capacitor.
It is preferred that the wave wave amplitude at the thickening part edge is between 0.15mm-0.4mm, wavelength 1.5mm-5mm it
Between.
It is preferred that the plated base of the coat of metal is included positioned at the length side along the basement membrane of the basement membrane side
Arranged to extension and the strap being connected with the thickening part and positioned at the length direction along the basement membrane of the basement membrane opposite side
Row and some plating layer units separately, some plating layer units stay edge and are located at institute by corresponding respectively by described
State some connection narrow portions among basement membrane and be connected to the strap.In the thin film capacitor in use, working as some described plating
When electric weak point breakdown occurs in layer unit, the puncture short electric current of moment fuses the connection narrow portion for connecting the plating layer unit,
The other parts short circuit of the plating layer unit and the coat of metal is separated, plays a part of fuse so that the thin-film electro
Container keeps normal operating conditions；Moreover, it is the strap by the basement membrane side, opposite side is some coating lists
The design of member, it can not only avoid all evaporation plating layer units and cause small product size to become big, the shortcomings that material cost increase,
The easy appearance that can prevent from therefore the bringing excessively sensitive capacitance loss in turn resulting in the thin film capacitor that fuses is too fast
Shortcoming.
Specifically, the strap and it is some it is described plating layer unit between formed with along the basement membrane length direction extension and
Spaced some first gaps, it is connected with described stay by some platings between edge in the middle part of some first gaps
Layer unit some second gaps spaced apart, the connection narrow portion is formed between adjacent first gap.
It is preferred that some second gaps are parallel to each other and are inclined to set.
To achieve these goals, thin film capacitor of the present utility model includes capacitor core as described above, formed
The spray-welding coating of the capacitor core end and the electrode pin drawn from the spray-welding coating.
Compared with prior art, the plated base uses fine aluminium material, is effectively utilized the chemical characteristic of aluminum metal not
Ripple living, in the thin film capacitor long-term work under damp and hot severe rugged environment, the coat of metal can still keep stability, together
When also improve the dielectric field intensity of the thin film capacitor, in the resistance to pressure of identical, the thin film capacitor can use thinner
Dielectric thickness, reduce volume and material cost.By using the design of the thickening part, the capacitance core is effectively increased
Sub and effective contact area of the spray-welding coating, the ability of the anti-pulse current impact of the thin film capacitor is improved, it is described
Thin film capacitor has more excellent conveyance capacity.
Brief description of the drawings
Fig. 1 is the tiling schematic cross-section of the capacitor core of the utility model embodiment thin film capacitor.
Fig. 2 is the tiling fragmentary views of the metallized film of the capacitor core shown in Fig. 1.
Fig. 3 is the schematic diagram of the thin film capacitor of the utility model embodiment.
Embodiment
To describe technology contents of the present utility model, construction feature, the effect realized in detail, below in conjunction with embodiment
And accompanying drawing is coordinated to be explained in detail.
Fig. 1 to Fig. 3 is referred to, the thin film capacitor of the utility model embodiment includes capacitor core 1, formed in the electricity
The spray-welding coating 2 for holding fuse 1 end, the electrode pin 3 drawn from the spray-welding coating 2, be installed with the shell 4 of the capacitor core 1 with
And the epoxy resin 5 between the capacitor core 1 and the shell 4 is poured in, wherein, the capacitor core 1 is by two metallization
Film layer poststack winds to be formed, and each metallized film includes basement membrane 11 and forms the metal on the basement membrane 11 respectively
Coating 12, beyond the coat of metal 12 formed with edge 111 is stayed, the coat of metal 12 includes plating at the edge of basement membrane 11 1
In the thickening part 122 of the other edge of basement membrane 11, the plated base 121 is fine aluminium material, described for layer base portion 121 and formation
Thickening part 122 is allumen material, and two metallized film mutually in reverse and stagger setting and then causes two gold medal
One of categoryization film stays edge 111 to be exceeded by another thickening part 122 of two metallized film.With prior art phase
Than the plated base 121 uses fine aluminium material, the chemical characteristic ripple not living of aluminum metal is effectively utilized, in the thin-film electro
Under damp and hot severe rugged environment, the coat of metal 12 can still keep stability for container long-term work, while also improve described
The dielectric field intensity of thin film capacitor, in the resistance to pressure of identical, the thin film capacitor can use thinner dielectric thickness, reduce
Volume and material cost.By using the design of the thickening part 122, the capacitor core 1 and the spray are effectively increased
Effective contact area of layer 2, improve the ability of the anti-pulse current impact of the thin film capacitor, the thin film capacitor
With more excellent conveyance capacity.
Refer to Fig. 1 and Fig. 2, it is preferred that the edge of the thickening part 122 formed using Wave-cut technique it is wavy, more
Goodly, the wave amplitude of the wave at the edge of thickening part 122 is between 0.15mm-0.4mm, and wavelength is between 1.5mm-5mm, foundation
Depending on the width of the metallized film.By wavy design, the capacitor core 1 and the spray-welding coating are effectively increased
2 contact area and adhesive force, reduce contact sheet resistance of the capacitor core 1 with the spray-welding coating 2, improve the film
The ability of the resistance to rush of current of capacitor.It is preferred that the material of the basement membrane 11 is resistant to elevated temperatures polypropylene film.
Fig. 1 and Fig. 2 is referred to, it is preferred that the plated base 121 of the coat of metal 12 includes being located at the basement membrane 11 1
The length direction along the basement membrane 11 of side extends and the strap 123 that is connected with the thickening part 122 and positioned at the basement membrane
The length direction along the basement membrane 11 of 11 opposite sides arranges and some plating layer units 124 separately, some coating lists
Member 124 is stayed edge 111 described in and connected respectively by corresponding some connection narrow portions 125 among the basement membrane 11
To the strap 123.In the thin film capacitor 100 in use, when electric weak point breakdown occurs in some described plating layer unit 124
When, the puncture short electric current of moment fuses the narrower connection narrow portion 125 for connecting the plating layer unit 124, by the coating
The other parts short circuit of unit 124 and the coat of metal 12 separates, and plays a part of fuse so that the thin film capacitor
100 keep normal operating conditions；Moreover, it is the strap 123 by the side of basement membrane 11, opposite side is some platings
The design of layer unit 124, it can not only avoid all evaporation plating layer units and cause small product size to become big, material cost is increased
Shortcoming, the easy appearance for being also possible to prevent therefore to bring fuse the excessively sensitive capacitance loss in turn resulting in the thin film capacitor
The shortcomings that too fast.Specifically, it is some it is described plating layer units 124 between gap widths, it is some it is described plating layer units 124 with it is described
Gap width between strap 123, and the design of the width of some connection narrow portions 125 depend on product actual capacity
With pressure-resistant specification requirement, fusing reliability of the thin film capacitor in electric weak point breakdown should be ensured, also to avoid the company
Connect that narrow portion 125 is too thin and fusing is excessively sensitive, unnecessary fusing short circuit occurs, causes described in the excessive influence of capacity attenuation
The performance parameters of thin film capacitor, also to avoid the connection width of narrow portion 125 wide, can not disconnect in time during electric weak point breakdown
And safe anti-explosion function is lost, through experiment, the width for connecting narrow portion 125 value between 0.2mm-1.0mm is more reasonable.
Referring to Fig. 2, specifically, formed with along the base between the strap 123 and some plating layer units 124
The length direction of film 11 extends and spaced some first gaps 126, and side is stayed in some middle parts of first gap 126 with described
It is connected with some plating layer units 124 some second gaps 127 spaced apart between portion 111, corresponding described first
Gap 126 and second gap 127 combine to form substantially T-shaped gap, formed between adjacent first gap 126 described in
Connect narrow portion 125；It is preferred that some second gaps 124 are parallel to each other and are inclined to set.
Above disclosed is only preferred embodiments of the present utility model, can not limit the utility model with this certainly
Interest field, therefore equivalent variations made according to present utility model application the scope of the claims still fall within the utility model and are covered
Scope.
Claims (8)
1. a kind of capacitor core of thin film capacitor, it is characterised in that the capacitor core is rolled up by two metallized film layers poststacks
Around formation, each metallized film includes basement membrane and formed in the epilamellar coat of metal, the basement membrane one respectively
Beyond the coat of metal formed with edge is stayed, the coat of metal includes plated base and formed another in the basement membrane at edge
The thickening part at edge, the plated base are fine aluminium material, and the thickening part is allumen material, two metallized film
Mutually in reversely and stagger setting cause one of two metallized film stay edge by the another of two metallized film
Thickening part exceed.
2. the capacitor core of thin film capacitor as claimed in claim 1, it is characterised in that the material of the basement membrane is polypropylene
Film.
3. the capacitor core of thin film capacitor as claimed in claim 1, it is characterised in that the thickening part edge uses wave
Separating and cutting process forms wavy.
4. the capacitor core of thin film capacitor as claimed in claim 3, it is characterised in that the wave ripple at the thickening part edge
Width is between 0.15mm-0.4mm, and wavelength is between 1.5mm-5mm.
5. the capacitor core of thin film capacitor as claimed in claim 1, it is characterised in that the plated base of the coat of metal
Including positioned at the length direction extension of the basement membrane side along the basement membrane and the strap being connected with the thickening part and position
In length direction arrangement of the basement membrane opposite side along the basement membrane and some plating layer units separately, some coating
Unit stays edge described in and is connected to the band by corresponding some connection narrow portions among the basement membrane respectively
Shape portion.
6. the capacitor core of thin film capacitor as claimed in claim 5, it is characterised in that the strap and some platings
Formed with along basement membrane length direction extension and spaced some first gaps between layer unit, between some described first
In the middle part of gap and described stay is connected with some second gaps for opening some coating unit intervals between edge, and adjacent is described
The connection narrow portion is formed between first gap.
7. the capacitor core of thin film capacitor as claimed in claim 6, it is characterised in that some second gaps are mutually flat
Go and be inclined to set.
8. a kind of thin film capacitor, it is characterised in that including the capacitor core as described in claim any one of 1-7, formed
The spray-welding coating of the capacitor core end and the electrode pin drawn from the spray-welding coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720259686.5U CN206726958U (en) | 2017-03-16 | 2017-03-16 | Thin film capacitor and its capacitor core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720259686.5U CN206726958U (en) | 2017-03-16 | 2017-03-16 | Thin film capacitor and its capacitor core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206726958U true CN206726958U (en) | 2017-12-08 |
Family
ID=60501099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720259686.5U Active CN206726958U (en) | 2017-03-16 | 2017-03-16 | Thin film capacitor and its capacitor core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206726958U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550465A (en) * | 2018-04-18 | 2018-09-18 | 钱立文 | A kind of interior and structured metallization film |
| CN110767457A (en) * | 2019-09-26 | 2020-02-07 | 扬州凯普科技有限公司 | Ultrahigh-voltage metallized film capacitor and preparation method thereof |
| CN110875131A (en) * | 2019-12-11 | 2020-03-10 | 无锡宸瑞新能源科技有限公司 | Thin film capacitor and energy storage welding machine using same |
| CN111448631A (en) * | 2018-01-18 | 2020-07-24 | 松下知识产权经营株式会社 | Thin film capacitor |
| CN115472428A (en) * | 2022-08-12 | 2022-12-13 | 安徽省宁国市海伟电子有限公司 | Metallized film for film capacitor and film capacitor |
-
2017
- 2017-03-16 CN CN201720259686.5U patent/CN206726958U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111448631A (en) * | 2018-01-18 | 2020-07-24 | 松下知识产权经营株式会社 | Thin film capacitor |
| CN111448631B (en) * | 2018-01-18 | 2021-12-03 | 松下知识产权经营株式会社 | Thin film capacitor |
| CN108550465A (en) * | 2018-04-18 | 2018-09-18 | 钱立文 | A kind of interior and structured metallization film |
| CN110767457A (en) * | 2019-09-26 | 2020-02-07 | 扬州凯普科技有限公司 | Ultrahigh-voltage metallized film capacitor and preparation method thereof |
| CN110875131A (en) * | 2019-12-11 | 2020-03-10 | 无锡宸瑞新能源科技有限公司 | Thin film capacitor and energy storage welding machine using same |
| CN115472428A (en) * | 2022-08-12 | 2022-12-13 | 安徽省宁国市海伟电子有限公司 | Metallized film for film capacitor and film capacitor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210728 Address after: 529100 block 3, Zhongnan hi tech. Xinhui Rongzhi CHUANGMEI industrial Valley, No. 44, Yeguang Road, Siqian Town, Xinhui District, Jiangmen City, Guangdong Province (Information Declaration System) Patentee after: Guangdong guocan Electronic Technology Co.,Ltd. Address before: 523000 shilongkeng Huangkeng Industrial Zone, Liaobu Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN KWOKTRAN ELECTRONICS Co.,Ltd. |