CN218957546U - Film capacitor - Google Patents

Film capacitor Download PDF

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Publication number
CN218957546U
CN218957546U CN202223151915.1U CN202223151915U CN218957546U CN 218957546 U CN218957546 U CN 218957546U CN 202223151915 U CN202223151915 U CN 202223151915U CN 218957546 U CN218957546 U CN 218957546U
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electrodes
electrode
dielectric film
film capacitor
electrically connected
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CN202223151915.1U
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Chinese (zh)
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刘博�
王安安
艾立华
艾亮
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Hunan Aihua Group Co Ltd
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Hunan Aihua Group Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13Energy storage using capacitors

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Abstract

A thin film capacitor includes a plurality of first electrodes and a plurality of second electrodes, the first electrodes and the second electrodes being alternately laminated in sequence, the first electrodes and the second electrodes being separated by a separation dielectric film; the first electrode comprises a first dielectric film and a first metal layer positioned on two sides of the first dielectric film, and the second electrode comprises a second dielectric film and a second metal layer positioned on two sides of the second dielectric film; the first electrodes are electrically connected together through the first connecting piece, and the second electrodes are electrically connected together through the second connecting piece. In the utility model, a first metal layer is formed on two surfaces of a first dielectric film, and a second metal layer is formed on two surfaces of a second dielectric film; the dielectric film with the metallized double surfaces has strong current carrying capacity, so that the voltage withstand capacity of the film capacitor is enhanced, and the working environment temperature is increased.

Description

Film capacitor
Technical Field
The present utility model relates to a thin film capacitor, and more particularly, to a stacked thin film capacitor.
Background
The thin film capacitor has mainly the characteristics of no polarity, high insulation resistance, excellent frequency characteristics (broad frequency response), and small dielectric loss. Based on the above advantages, thin film capacitors are used in a large amount on analog circuits. Particularly, in the signal connection part, a capacitor with good frequency characteristic and extremely low dielectric loss is required to be used, so that the situation that the signal is not too distorted during transmission can be ensured.
However, the thin film capacitor has poor capability of bearing large current due to poor capability of resisting large current, so that the thin film capacitor generates heat. When the metallized film capacitor works in a high-temperature state for a long time, the body is extremely easy to deform, and the voltage breaks down and bursts to directly fail. The metallized film capacitor is disabled for many reasons, but most of them are caused by high temperature thermal breakdown of the film chip body.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing a laminated film capacitor with strong bearing capacity of large current.
In order to solve the technical problems, the technical scheme provided by the utility model is that the thin film capacitor comprises a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes are sequentially and alternately laminated, and the first electrodes and the second electrodes are separated by an isolating dielectric film; the first electrode comprises a first dielectric film and a first metal layer positioned on two sides of the first dielectric film, and the second electrode comprises a second dielectric film and a second metal layer positioned on two sides of the second dielectric film; the first electrodes are electrically connected together through the first connecting piece, and the second electrodes are electrically connected together through the second connecting piece.
In the above thin film capacitor, preferably, one end of the first electrode protrudes to form a first connection tab, and both surfaces of the first connection tab are formed with a first metal layer.
In the above thin film capacitor, preferably, the first dielectric film at the other end of the first electrode opposite to the first connection tab is left white.
In the above thin film capacitor, preferably, one end of the second electrode protrudes to form a second connection tab, and both surfaces of the second connection tab are formed with a second metal layer.
In the above thin film capacitor, preferably, the second dielectric thin film at the other end of the second electrode opposite to the second connection tab is left white.
In the above thin film capacitor, preferably, the first connection member includes a first connection conductive sheet, and the first metal layers on both surfaces of the first electrode are electrically connected to the first connection conductive sheet.
In the above thin film capacitor, preferably, a first spacer is disposed between two adjacent first electrodes, and the first spacer is disposed at one end of the first electrode electrically connected to the first connection conductive sheet.
In the above thin film capacitor, preferably, the second connection member includes a second connection lead, and the second metal layers on both surfaces of the second electrode are electrically connected to the second connection lead.
In the above thin film capacitor, preferably, a second spacer is disposed between two adjacent second electrodes, and the second spacer is disposed at one end of the second electrode electrically connected to the second connection conductive sheet.
Compared with the prior art, the utility model has the advantages that: in the utility model, a first metal layer is formed on two surfaces of a first dielectric film, and a second metal layer is formed on two surfaces of a second dielectric film; the dielectric film with the metallized double surfaces has strong current carrying capacity, so that the voltage withstand capacity of the film capacitor is enhanced, and the working environment temperature is increased.
Drawings
Fig. 1 is a schematic sectional structure of a thin film capacitor in example 1.
Fig. 2 is a schematic structural diagram of the first electrode or the second electrode in embodiment 1.
Fig. 3 is a schematic structural diagram of the first electrode or the second electrode in other embodiments.
FIG. 4 is a schematic structural view of the core laminate of example 1.
FIG. 5 is a schematic illustration of the structure of a core stack in other embodiments.
Description of the drawings
1. Packaging the shell; 2. a core; 21. a first electrode; 211. a first dielectric film; 212. a first metal layer; 213. a first connection tab; 22. A second electrode; 221. a second dielectric film; 222. a second metal layer; 223. the second connecting tab; 23. an isolation dielectric film; 3. a first connector; 31. a first connecting guide piece; 32. a first gasket; 4. a first electrode lead; 5. a second connector; 51. the second connecting guide piece; 53. a second gasket; 6. a second electrode lead; 7. conducting resin; 8. extruding the blocks.
Detailed Description
The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the utility model, but the scope of the utility model is not limited to the specific embodiments shown.
It will be understood that when an element is referred to as being "fixed, affixed, connected, or in communication with" another element, it can be directly fixed, affixed, connected, or in communication with the other element or intervening elements may be present.
Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present utility model.
Example 1
A film capacitor as shown in fig. 1 comprises a core 2 and a package 1, wherein the core 2 is hermetically arranged in the package 1, and a pressing block 8 presses the core 2 in the package 1. The core 2 includes a plurality of first electrodes 21 and a plurality of second electrodes 22, the first electrodes 21 and the second electrodes 22 being alternately laminated in this order, the first electrodes 21 and the second electrodes 22 being separated by a separation dielectric film 23. The entire core 2 has a structure of the first electrode 21-the isolation dielectric film 23-the second electrode 22-the isolation dielectric film 23-the first electrode 21, which are alternately laminated in this order. In the present embodiment, as shown in fig. 2, the first electrode 21 includes a first dielectric film 211 and a first metal layer 212 on both sides of the first dielectric film 211; the second electrode 22 includes a second dielectric film 221 and a second metal layer 222 on both sides of the second dielectric film 221. In this embodiment, the first electrode 21 and the second electrode 22 are both double-sided metallized films, and the double-sided metallized films have strong capability of carrying large current, so that the withstand voltage capability of the film capacitor of this embodiment is improved, and meanwhile, compared with the film capacitor of the conventional single-sided metallized film, the film capacitor is not easy to generate heat during use, so that the use environment problem of the film capacitor of this embodiment is improved.
In the present embodiment, one end of the first electrode 21 protrudes to form a first connection tab 213; both surfaces of the first connection tab 213 are formed with a first metal surface as the first electrode 21. The other end of the first electrode 21 opposite to the first connection tab 213 is left with the first dielectric film 211, and the left portion is that the first metal layer 212 is not formed on both surfaces of the first dielectric film 211. The structure of the second electrode 22 is basically the same as that of the first electrode 21, and one end of the second electrode 22 protrudes to form a second connection tab 223; both surfaces of the second connection tab 223 are formed with a second metal surface as with the second electrode 22. The second dielectric film 221 on the other end of the second electrode 22 opposite to the first connection tab 213 is left white, and the portion left white is that no second metal layer is formed on both surfaces of the second dielectric film 221.
As shown in fig. 3, in other embodiments the first electrode or the second electrode is schematically configured. In other embodiments, the first connection tab on the first electrode is formed such that the first dielectric film is integrally protruded, and then the first metal surfaces are formed on both surfaces of the protruded first dielectric film; that is, the first connection tab is integrally formed by extending the first electrode, and the width of the first connection tab is the same as the width of the first electrode. The structure of the second connecting tab is the same as that of the first connecting tab.
In the present embodiment, as shown in fig. 3, the first connection tab 213 on the first electrode 21 and the second connection tab 223 on the second electrode 22 are respectively provided at both ends, so that there is no interference between the first connection tab 213 and the second connection tab 223 when they are respectively connected together, and the operation is easy. In this embodiment, since the ends of the first electrode 21 and the second electrode 22 opposite to the first connection tab 213 and the second connection tab 223, respectively, are left white, the insulating dielectric film 23 can cover the first metal layer 212 and the second metal layer 222 on the first electrode 21 and the second electrode 22, and prevent contact between the adjacent first metal layer 212 and second metal layer 222. In the present embodiment, the isolation dielectric film 23 may be the first dielectric film 211 or the second dielectric film 221, such as a plastic film of polyethylene, polypropylene, polystyrene, or polycarbonate.
As shown in fig. 4, in other embodiments, the first connection tab 213 on the first electrode 21 and the second connection tab 223 on the second electrode 22 may be disposed at one end, but the first connection tab 213 and the second connection tab 223 are disposed at two sides of the first electrode 21 and the second electrode 22, respectively.
In this embodiment, as shown in fig. 1, the first connecting piece 3 includes a first connecting conductive sheet 31, and the first metal layers 212 on two surfaces of the first connecting tab 213 are electrically connected to the first connecting conductive sheet 31. A first spacer 32 is disposed between two adjacent first electrodes 21, and the first spacer 32 is disposed at one end of the first electrode 21 electrically connected to the first connection conductive sheet 31. The first pad 32, the first connection tab 213 and the first connection guide tab 31 are all electrically connected.
In this embodiment, as shown in fig. 1, the second connection piece 5 includes a second connection conductive sheet 51, and the second metal layers 222 on two surfaces of the second connection tab 223 are electrically connected to the second connection conductive sheet 51. A second spacer 53 is disposed between two adjacent second electrodes 22, and the second spacer 53 is disposed at one end of the second electrode 22 electrically connected to the second connection conductive sheet 51. The second spacer 53, the second connection tab 223 and the second connection guide piece 51 are all electrically connected.
In this embodiment, as shown in fig. 1, a plurality of first electrodes 21 are electrically connected together through a first connecting member 3, and a first electrode lead 4 is electrically connected to the first connecting member 3; the plurality of second electrodes 22 are electrically connected together through the second connecting piece 5, and the second connecting piece 5 is electrically connected with the second electrode outgoing line 6.
In this embodiment, the first electrode lead may be formed by extending the first connection lead 31 out of the package; the second electrode lead may be formed by extending the second connection lead 51 out of the package.
In this embodiment, the first pad 32 and the second pad 53 are the same, and the conductive adhesive 7 is disposed on the surface of the first pad 32, so that the first connection tab 213 can be conveniently and fixedly electrically connected to the first pad 32; the surface of the second spacer 53 is provided with the conductive adhesive 7, so that the second connection tab 223 can be conveniently and fixedly electrically connected to the second spacer 53; the first connecting guide piece 31 is fixedly and electrically connected together through the conductive adhesive 7 on the surface of the first gasket 32, and the second connecting guide piece 51 is fixedly and electrically connected together through the conductive adhesive 7 on the surface of the second gasket 53.
In the present utility model, a first metal layer 212 is formed on both sides of a first dielectric film, and a second metal layer 222 is formed on both sides of a second dielectric film; the dielectric film with the metallized double surfaces has strong current carrying capacity, so that the voltage withstand capacity of the film capacitor is enhanced, and the working environment temperature is increased.

Claims (9)

1. A thin film capacitor, characterized in that: the device comprises a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes are sequentially and alternately laminated, and the first electrodes and the second electrodes are separated by an isolating dielectric film; the first electrode comprises a first dielectric film and a first metal layer positioned on two sides of the first dielectric film, and the second electrode comprises a second dielectric film and a second metal layer positioned on two sides of the second dielectric film; the first electrodes are electrically connected together through the first connecting piece, and the second electrodes are electrically connected together through the second connecting piece.
2. A film capacitor as set forth in claim 1, wherein: one end of the first electrode protrudes to form a first connecting tab, and a first metal layer is formed on two surfaces of the first connecting tab.
3. A film capacitor as set forth in claim 2, wherein: the first dielectric film at the other end of the first electrode opposite to the first connecting tab is left white.
4. A film capacitor as set forth in claim 1, wherein: one end of the second electrode protrudes to form a second connecting tab, and second metal layers are formed on two surfaces of the second connecting tab.
5. A film capacitor as set forth in claim 2, wherein: and the second dielectric film at the other end of the second electrode opposite to the second connecting lug is left white.
6. A film capacitor according to any one of claims 1 to 5, wherein: the first connecting piece comprises a first connecting guide piece, and the first metal layers on the two surfaces of the first electrode are electrically connected with the first connecting guide piece.
7. The thin film capacitor of claim 6, wherein: a first gasket is arranged between two adjacent first electrodes, and the first gasket is arranged at one end of the first electrodes, which is electrically connected with the first connecting conducting piece.
8. A film capacitor according to any one of claims 1 to 5, wherein: the second connecting piece comprises a second connecting guide piece, and the second metal layers on the two surfaces of the second electrode are electrically connected with the second connecting guide piece.
9. A film capacitor as set forth in claim 8, wherein: a second gasket is arranged between two adjacent second electrodes, and the second gasket is arranged at one end of the second electrode electrically connected with the second connecting conducting plate.
CN202223151915.1U 2022-11-28 2022-11-28 Film capacitor Active CN218957546U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223151915.1U CN218957546U (en) 2022-11-28 2022-11-28 Film capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223151915.1U CN218957546U (en) 2022-11-28 2022-11-28 Film capacitor

Publications (1)

Publication Number Publication Date
CN218957546U true CN218957546U (en) 2023-05-02

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ID=86102806

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223151915.1U Active CN218957546U (en) 2022-11-28 2022-11-28 Film capacitor

Country Status (1)

Country Link
CN (1) CN218957546U (en)

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