CN111341557A - Metallized film for capacitor and capacitor - Google Patents
Metallized film for capacitor and capacitor Download PDFInfo
- Publication number
- CN111341557A CN111341557A CN202010264577.9A CN202010264577A CN111341557A CN 111341557 A CN111341557 A CN 111341557A CN 202010264577 A CN202010264577 A CN 202010264577A CN 111341557 A CN111341557 A CN 111341557A
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- capacitor
- type
- metallized film
- shaped transparent
- capacitor unit
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- 239000003990 capacitor Substances 0.000 title claims abstract description 129
- 239000011104 metalized film Substances 0.000 title claims abstract description 57
- 239000010408 film Substances 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 230000008719 thickening Effects 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- H01G4/002—Details
- H01G4/005—Electrodes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention relates to the technical field of explosion-proof capacitors, in particular to a metallized film for a capacitor and the capacitor, wherein the metallized film comprises a base film and a metal coating arranged on the front surface of the base film; the metal coating comprises an electrode thickening area and a capacitor moving area, the thickness of the electrode thickening area is larger than that of the capacitor moving area, and the upper end face and the lower end face of the base film are wavy faces. The wavy surface can increase the contact area, improve the adhesive force of metal spraying, reduce the contact resistance and improve the maximum impact current that the capacitor can bear. In addition, a plurality of capacitor unit cells are arranged on the capacitor active area, gaps on the capacitor unit cells are used as fuses, when the capacitors are disconnected, the capacitors fail to be in an open circuit state instead of a short circuit state, and other circuits are not affected. Because the fuse is disconnected and only the capacity of a certain cell is lost, the situation that the capacity is greatly reduced can not occur, and the capacitor can be ensured not to be influenced by the function caused by the great reduction of the capacity.
Description
Technical Field
The invention relates to the technical field of explosion-proof capacitors, in particular to a metallized film for a capacitor and the capacitor.
Background
The common metallized film capacitor has weak capability of bearing the maximum peak current and the maximum impact current. When the voltage between two electrodes of the capacitor exceeds the bearing range of a common metallized film, the capacitor breaks down, the breakdown mode is uncertain, a short circuit state can be presented, an open circuit state can be presented, and if the capacitor breaks down and presents a short circuit state, other surrounding circuits can be adversely affected.
Disclosure of Invention
In order to solve the technical problem that a capacitor made of a common metallized film in the prior art is poor in current surge resistance, the application provides a metallized film for a capacitor and the capacitor.
A metallized film for a capacitor includes a base film and a metal plating layer disposed on a front surface of the base film;
the metal coating comprises an electrode thickened area and a capacitor active area, and the thickness of the electrode thickened area is greater than that of the capacitor active area;
the upper end face and the lower end face of the base film are wavy faces.
In one embodiment, a plurality of capacitor cells are disposed on the capacitive active area.
In one embodiment, a plurality of L-shaped transparent bars are arranged on the capacitor active area, and the plurality of L-shaped transparent bars comprise a plurality of short L-shaped transparent bars and a plurality of long L-shaped transparent bars;
wherein, every two short L-shaped transparent bars are arranged oppositely to form a first type of capacitor unit cell, every two long L-shaped transparent bars are arranged oppositely to form a second type of capacitor unit cell,
the plurality of capacitor unit cells include a plurality of first type capacitor unit cells and a plurality of second type capacitor unit cells, and the first type capacitor unit cells and the second type capacitor unit cells are arranged at intervals.
In one embodiment, the short L-shaped transparent strip and the long L-shaped transparent strip are both L-shaped transparent strips, and one side of each L-shaped transparent strip has the same length, and the other side of each L-shaped transparent strip has different length;
the short sides of the two short L-shaped transparent strips are close to each other to form a rectangular first type capacitor unit cell, the short sides of the two long L-shaped transparent strips are close to each other to form a rectangular second type capacitor unit cell, the width of the second type capacitor unit cell is the same as that of the first type capacitor unit cell, and the length of the second type capacitor unit cell is larger than that of the first type capacitor unit cell.
In one embodiment, a gap is provided between two short sides of two short L-shaped transparent bars enclosing the first type of capacitor cell, and a gap is also provided between two short sides of two long L-shaped transparent bars enclosing the second type of capacitor cell, the gaps forming a fuse.
In one embodiment, a transition region is further disposed between the electrode thickening region and the capacitor active region, and the thickness of the transition region is between the thickness of the electrode thickening region and the thickness of the capacitor active region.
In one embodiment, the width of the electrode thickening region is 5-10 mm.
In one embodiment, the base film is further provided with a blank area which is not plated with the metal plating layer and is close to the lower end face.
A capacitor core is made of the metallized film.
A capacitor core comprising two said metallized films arranged one on top of the other such that a first type of capacitor cell of one metallized film is vertically co-located with and complementary to a second type of capacitor cell of the other metallized film.
A capacitor made using the metallized film as described above.
According to the metallized film of above-mentioned embodiment, it includes the base film and sets up the metal coating on the base film front surface, and the metal coating includes electrode thickening district and electric capacity active area, and the thickness in electrode thickening district is greater than the thickness in electric capacity active area, and the up end and the lower terminal surface of base film are the wave face, and the wave face can increase area of contact, improves the adhesive force of spouting the gold, reduces contact resistance, improves the biggest impulse current that the condenser can bear.
Drawings
Fig. 1 is a schematic structural view of a metallized film according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a metallized film of an embodiment of the present application taken along the line A-A in FIG. 1;
FIG. 3 is a schematic view of a structure of two metallized films according to an embodiment of the present application after they are stacked;
FIG. 4 is a sectional view of a capacitor core made by using the metallized film of the present embodiment;
fig. 5 is a schematic view of a conventional metallized film after lamination.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. In addition, for the convenience of description of the metallized film structure of the present application, the front, rear, upper, lower, and the like presented herein are merely used to illustrate the structure of the present application by way of example in the drawings, and do not have any position-limiting meaning. In addition, "long" and "short" in the present application are merely for distinguishing types, and are relative to each other, and are not described in an unclear manner.
The first embodiment is as follows:
referring to fig. 1 and 2, the present embodiment provides a metallized film for a capacitor, which includes a base film 10 and a metal plating layer 20 disposed on a front surface of the base film 10, wherein the metal plating layer 20 includes an electrode thickening region 21 and a capacitor active region 22, the thickness of the electrode thickening region 21 is greater than that of the capacitor active region 22, the electrode thickening region 21 is used for spraying a metal layer, a lead-out wire is used as an electrode, the lead-out wire has a large thickness to bear a larger current impact, and the capacitor active region 22 is used for storing a capacitor. A transition region 23 is further arranged between the electrode thickening region 21 and the capacitance active region 22, and the thickness of the transition region 23 is between the thickness of the electrode thickening region 21 and the thickness of the capacitance active region 22. The transition zone 23 is ramp shaped.
In this embodiment, the width of the electrode thickened region 21 is 5 to 10mm, that is, the width of the electrode thickened region 21 from the upper end to the lower end is 5 to 10mm, and a blank region 11 without the metal plating layer 20 is formed near the lower end surface of the base film 10.
The up end and the lower terminal surface of base film 10 of this embodiment are first wavy surface 24 and second wavy surface 12 respectively, and is concrete, and first wavy surface 24 and second wavy surface 12 are sinusoidal wavy surface, and the wavy surface can increase the adhesion area, improves the adhesive force of spouting the gold, reduces contact resistance, improves the biggest impulse current that the condenser can bear.
In the present embodiment, a plurality of capacitor cells 34 are disposed on the capacitor active region 22, and the capacitor cells 34 are used for storing capacitance.
Specifically, in the present embodiment, a plurality of L-shaped transparent bars are disposed on the capacitor active region 22, and the L-shaped transparent bars include a plurality of short L-shaped transparent bars 31 and a plurality of long L-shaped transparent bars 32. Wherein, every two short L-shaped transparent strips 31 are oppositely arranged to form a first type of capacitor unit cell 35, and every two long L-shaped transparent strips 32 are oppositely arranged to form a second type of capacitor unit cell 34. The plurality of capacitor unit cells include a plurality of first type capacitor unit cells 35 and a plurality of second type capacitor unit cells 34, and the first type capacitor unit cells 35 and the second type capacitor unit cells 34 are arranged at intervals.
The short L-shaped transparent strip 31 and the long L-shaped transparent strip 32 of the present embodiment are both L-shaped transparent strips, which include two sides, one side of which has the same length, and the other side of which has a different length. The short sides of the two short L-shaped transparent strips 31 are close to each other to form a rectangular first-type capacitor unit cell 35, the short sides of the two long L-shaped transparent strips 32 are close to each other to form a rectangular second-type capacitor unit cell 34, the second-type capacitor unit cell 34 and the first-type capacitor unit cell 35 are both rectangular and have the same width, and the length of the second-type capacitor unit cell 34 is greater than that of the first-type capacitor unit cell 35.
Wherein a gap is provided between the two short sides of the two short L-shaped transparent strips enclosing the first type of capacitor cell 35, a gap 33 is also provided between the two short sides of the two long L-shaped transparent strips enclosing the second type of capacitor cell 34, and the gap 33 forms a fuse. The gap 33 is used as a fuse and has a protection effect on a circuit device, when the current generated by the release of the stored charges of the capacitor unit cells exceeds the bearing capacity of the fuse, the fuse is broken, and because the current bearing capacity of the gap 33 is lower than that of other places, self-healing breakdown is generated at the gap 33, namely the fuse is broken, the capacity of the capacitor is reduced, the energy accumulated by the capacitor is reduced, the capacitor is prevented from generating avalanche breakdown, and meanwhile, when the gap 33 is broken, namely the fuse is broken, the capacitor fails to be in an open-circuit state rather than a short-circuit state, and no influence is caused on other circuits; in addition, since the gap 33, i.e., the fuse, is opened to lose the capacity of one or more cells, the capacity is not greatly reduced, and the capacitor is ensured not to be affected by the capacity.
The capacitor made of the metallized film provided by the embodiment has the advantages that the bearable maximum impact current is improved, and the current impact resistance is enhanced.
In summary, the metallized film for a capacitor provided by this embodiment includes base film 10, metal coating 20 disposed on the upper layer of base film 10, metal coating 20 includes electrode thickened area 21 and capacitance active area 22, the upper end surface and the lower end surface of base film 10 are first wavy surface 24 and second wavy surface 12 respectively, the wavy surface can increase the adhesion area, improve the adhesive force of metal spraying, reduce contact resistance, and improve the maximum impact current that the capacitor can bear. In addition, a plurality of two kinds of alternate L-shaped transparent strips with different lengths and the same width are arranged on the capacitor active area 22, the two kinds of L-shaped transparent strips with different lengths and the same width and the screen band divide the capacitor active area 22 into two kinds of unit cells forming a capacitor, a gap is arranged between the two kinds of L-shaped transparent strips with the same length and the same width and the adjacent edge, the two kinds of L-shaped transparent strips are in contact with the electrode thickening area 21, and no metal coating is arranged on the two kinds of L-shaped transparent strips with different lengths and the same width; the capacitor has the advantages that the maximum peak current and the maximum impact current borne by the capacitor are greatly improved, and meanwhile, when the current generated by the release of the stored charges of the formed capacitor unit cells exceeds the bearing capacity of the fuse, the fuse is broken, the capacitance is reduced, and finally the capacitor has no capacitance, so that the capacitor is ensured to be in an open-circuit state when in failure, and the effect of no influence on other peripheral circuits is realized.
Example two
This embodiment provides a capacitor core in which two metallized films are oppositely stacked when manufacturing the capacitor core, and the structure of each metallized film is as shown in fig. 1 and fig. 2; as shown in fig. 3, the metallized film 420 is placed on the upper layer of the metallized film 410, so that the first type of capacitor unit cell of the metallized film 410 and the second type of capacitor unit cell of the metallized film 420 are in the same vertical direction and are complementary to each other, and then two sheets of the stacked metallized films are rolled up into a roll, and after repeating the operation for a plurality of times to obtain a plurality of rolls 42, as shown in fig. 4, after the plurality of rolls 42 are arranged, two ends of the plurality of rolls 42 are connected by the gold-sprayed layer 41.
If a common metallized film is used, that is, the edge of the base film 10 is not in a wave-shaped structure but in a straight-line structure, after two metallized films are oppositely stacked, as shown in fig. 5, the metallized film 520 is on the upper layer of the metallized film 510; then, the two stacked metallized films are rolled into a roll, a plurality of rolls are arranged, and both ends of the plurality of rolls are connected by a metal spraying layer.
For a metalized security film with the same size, comparing fig. 3 and fig. 5, it can be seen that the maximum distance between the edge of the metalized film 410 and the edge of the metalized film 420 in fig. 3 is S1, and the maximum distance between the edge of the metalized film 510 and the edge of the metalized film 520 in fig. 5 is S2, since the edges of the two ends of the base film 10 in the metalized security film provided by the embodiment are the first wavy surface 24 and the second wavy surface 12, S1 in fig. 3 is greater than S2 in fig. 5 compared with the edge of the base film 10 in a straight line structure, that is, the metalized film structure provided by the embodiment can increase the contact area between the gold-sprayed layer 41 and the electrode thickened region 21 at the edge of the metalized film, improve the adhesion of the gold-sprayed layer, reduce the contact resistance, and increase the maximum impact current that the capacitor can bear.
EXAMPLE III
This example provides a capacitor made from the metallized film described in example 1 above, which has been tested to provide a significant increase in the maximum inrush current that can be tolerated as compared to existing capacitors made from metallized films commonly used in the market.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. A metallized film for a capacitor, comprising a base film and a metal plating layer provided on a front surface of the base film;
the metal coating comprises an electrode thickened area and a capacitor active area, and the thickness of the electrode thickened area is greater than that of the capacitor active area;
the upper end face and the lower end face of the base film are wavy faces.
2. The metallized film of claim 1, wherein a plurality of capacitor cells are provided on the capacitive active area.
3. The metallized film of claim 2, wherein a plurality of L-shaped transparent bars are disposed over the capacitor active region, the plurality of L-shaped transparent bars comprising a plurality of short L-shaped transparent bars and a plurality of long L-shaped transparent bars;
wherein, every two short L-shaped transparent bars are arranged oppositely to form a first type of capacitor unit cell, every two long L-shaped transparent bars are arranged oppositely to form a second type of capacitor unit cell,
the plurality of capacitor unit cells include a plurality of first type capacitor unit cells and a plurality of second type capacitor unit cells, and the first type capacitor unit cells and the second type capacitor unit cells are arranged at intervals.
4. The metallized film of claim 3, wherein the short L-shaped clear bars and the long L-shaped clear bars are L-shaped clear bars, one of which has the same length and the other has a different length;
the short sides of the two short L-shaped transparent strips are close to each other to form a rectangular first type capacitor unit cell, the short sides of the two long L-shaped transparent strips are close to each other to form a rectangular second type capacitor unit cell, the width of the second type capacitor unit cell is the same as that of the first type capacitor unit cell, and the length of the second type capacitor unit cell is larger than that of the first type capacitor unit cell.
5. The metallized film of claim 4, wherein a gap is provided between two short sides of two short L-shaped transparent strips that enclose the first type of capacitor cell, and a gap is also provided between two short sides of two long L-shaped transparent strips that enclose the second type of capacitor cell, the gaps forming a fuse.
6. The metallized film of claim 1, wherein a transition zone is further provided between the electrode thickening zone and the capacitor active zone, the transition zone having a thickness between the thickness of the electrode thickening zone and the thickness of the capacitor active zone.
7. The metallized film of claim 1, wherein the electrode thickened region has a width of 5 to 10 mm.
8. A capacitor element, characterized in that it is made of a metallized film according to any one of claims 1 to 8.
9. A capacitor core comprising two metallized films according to any one of claims 4 to 8, arranged one on top of the other such that the first type of capacitor cell of one metallized film is vertically co-extensive with and complementary to the second type of capacitor cell of the other metallized film.
10. A capacitor made using the metallized film of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264577.9A CN111341557A (en) | 2020-04-07 | 2020-04-07 | Metallized film for capacitor and capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264577.9A CN111341557A (en) | 2020-04-07 | 2020-04-07 | Metallized film for capacitor and capacitor |
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| Publication Number | Publication Date |
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| CN111341557A true CN111341557A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010264577.9A Pending CN111341557A (en) | 2020-04-07 | 2020-04-07 | Metallized film for capacitor and capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112277347A (en) * | 2020-09-24 | 2021-01-29 | 铜陵市超越电子有限公司 | Oxidation-resistant metallized film and preparation device and processing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915839A (en) * | 2009-02-05 | 2013-02-06 | 尼吉康株式会社 | Metalized film capacitor |
| CN203456303U (en) * | 2013-08-23 | 2014-02-26 | 昆山泓电隆泰电子材料有限公司 | Waveform-divided metalized film |
| CN206742082U (en) * | 2017-03-10 | 2017-12-12 | 东莞市国灿电子科技有限公司 | Trigger electricity container and its capacitor core applied to frequent discharge and recharge occasion |
| KR20180060571A (en) * | 2016-11-29 | 2018-06-07 | 주식회사 뉴인텍 | Capacitor film and capacitor using the same |
| CN211957455U (en) * | 2020-04-07 | 2020-11-17 | 深圳市汇北川电子技术有限公司 | Metallized film for capacitor, capacitor core and capacitor |
-
2020
- 2020-04-07 CN CN202010264577.9A patent/CN111341557A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915839A (en) * | 2009-02-05 | 2013-02-06 | 尼吉康株式会社 | Metalized film capacitor |
| CN203456303U (en) * | 2013-08-23 | 2014-02-26 | 昆山泓电隆泰电子材料有限公司 | Waveform-divided metalized film |
| KR20180060571A (en) * | 2016-11-29 | 2018-06-07 | 주식회사 뉴인텍 | Capacitor film and capacitor using the same |
| CN206742082U (en) * | 2017-03-10 | 2017-12-12 | 东莞市国灿电子科技有限公司 | Trigger electricity container and its capacitor core applied to frequent discharge and recharge occasion |
| CN211957455U (en) * | 2020-04-07 | 2020-11-17 | 深圳市汇北川电子技术有限公司 | Metallized film for capacitor, capacitor core and capacitor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112277347A (en) * | 2020-09-24 | 2021-01-29 | 铜陵市超越电子有限公司 | Oxidation-resistant metallized film and preparation device and processing method thereof |
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