CN220821308U

CN220821308U - Metallized film for improving bonding strength of capacitor element and metal spraying layer

Info

Publication number: CN220821308U
Application number: CN202322358574.3U
Authority: CN
Inventors: 林树钿; 宋康省; 姚睿
Original assignee: Guangdong Fengming Electronic Tech Co ltd
Current assignee: Guangdong Fengming Electronic Tech Co ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-04-19
Anticipated expiration: 2033-08-31

Abstract

The utility model discloses a metallized film for improving the bonding strength of a capacitor element and a metal spraying layer, which relates to the technical field of film capacitors and comprises two film bodies, wherein the two film bodies are overlapped to form a metallized film laminated body. The metallized film improves the bonding strength of the capacitor element and the metal spraying layer so as to improve the element performance and reduce the performance defect of the capacitor.

Description

Metallized film for improving bonding strength of capacitor element and metal spraying layer

Technical Field

The utility model relates to the technical field of film capacitors, in particular to a metallized film for improving the bonding strength of a capacitor element and a metal spraying layer.

Background

The film capacitor is an essential basic element of an electronic complete machine, an electric appliance and an electric power device, and is widely applied to the high-tech fields of electronic equipment, computer equipment, communication equipment, energy-saving light sources, household appliances, military products and the like.

The thin film capacitor comprises a capacitor element, a metal spraying layer, a leading-out terminal, a shell and a filler, wherein the capacitor element is a core component of the whole capacitor. However, during the production process of the capacitor, the element is often subjected to external forces such as collision, extrusion, vibration, friction and the like, so that part of the metal spraying layer of the element is partially separated, and the performance of the element is affected, thereby causing performance defects and premature failure of the capacitor.

Disclosure of utility model

The utility model mainly aims to provide a metallized film for improving the bonding strength of a capacitor element and a metal spraying layer, and aims to provide a metallized film for improving the bonding strength of a capacitor element and a metal spraying layer, further improving element performance and reducing capacitor performance defects.

In order to achieve the above purpose, the metallized film for improving the bonding strength of the capacitor element and the metal spraying layer provided by the utility model comprises two film bodies, wherein the two film bodies are overlapped to form a metallized film laminated body, the two ends of the metallized film laminated body are metal spraying areas, the metal spraying areas comprise metal coating blocks and thickening areas, the metal coating blocks and the thickening areas are arranged on the two sides of the film bodies, and the metal spraying areas are arranged on the same film body or are respectively arranged on the two film bodies.

Optionally, two membrane bodies are defined as a first membrane body and a second membrane body, the structure of the first membrane body is identical to that of the second membrane body, the first membrane body comprises a first dielectric film, two sides of the first dielectric film are respectively a first surface and a second surface, the first surface sequentially forms a thickening area, a movable area and a first blank area, and the metal coating block is arranged on the second surface and corresponds to the position of the thickening area.

Optionally, the active area is disconnected and another first blank area is formed.

Optionally, two membrane bodies are defined as a first membrane body and a second membrane body, the structure of the first membrane body is different from that of the second membrane body, the first membrane body comprises a first dielectric film, two sides of the first dielectric film are respectively provided with a first surface and a second surface, the first surface is provided with a thickening area, an active area and a first white space, the thickening area is provided with two symmetrical parts and is arranged at two ends of the first surface, at least two active areas are arranged between the thickening areas, the active areas are connected with the thickening areas, a first white space is formed between adjacent two active areas, two metal coating blocks are arranged on the second surface and respectively correspond to the two thickening areas, the second membrane body comprises a second dielectric film, and two second coating areas and two second white spaces are arranged on one side of the second dielectric film facing the first membrane body and are arranged on two opposite sides of the second coating areas.

Optionally, the second plating region is disconnected and another second blank region is formed.

Optionally, two film bodies are defined as a first film body and a second film body, the structure of the first film body is different from that of the second film body, the two metal coating blocks are arranged on the first film body, and the second film body is a second dielectric film.

Optionally, the first film body includes a first dielectric film, two sides of the first dielectric film are a first surface and a second surface, and the first surface and the second surface are sequentially provided with the thickening area, the movable area, the first blank area and the metal coating block.

Optionally, the first film body includes first dielectric film, the both sides of first dielectric film are first face and second face respectively, first face is equipped with thickening district, movable zone and first blank zone that leaves, the thickening district has two and symmetry to locate the both ends of first face, the movable zone has two at least and is located two between the thickening district, the movable zone with the thickening district is connected, adjacent two form between the movable zone first blank zone, two the metal coating piece is located the second face, and correspond two respectively the thickening district, two be equipped with first cladding region between the metal coating piece, first cladding region with form first blank zone between the metal coating piece.

Optionally, the first plating region is provided in a disconnected state and forms another first blank region.

The technical scheme of the utility model comprises two film bodies which are overlapped to form a metallized film laminated body, wherein one side of the film body forms a thickening area through vapor deposition, the other side forms a metal coating block at the position corresponding to the thickening area through vapor deposition, and the thickening area and the metal coating block form a metal spraying area combined with a metal spraying layer, so that the combination capacity is enhanced.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a metallized film laminate of the present utility model;

FIG. 2 is a schematic diagram showing a connection structure between a metallized film laminate and a metal spraying layer according to a first embodiment;

FIG. 3 is a schematic structural view of a second embodiment of a metallized film laminate of the present utility model;

FIG. 4 is a schematic diagram showing a connection structure between a metallized film laminate and a metal spraying layer according to a second embodiment;

FIG. 5 is a schematic structural view of a third embodiment of a metallized film laminate of the present utility model;

FIG. 6 is a schematic diagram showing a connection structure between a metallized film laminate and a metal spraying layer according to a third embodiment;

FIG. 7 is a schematic structural view of a fourth embodiment of a metallized film laminate of the present utility model;

FIG. 8 is a schematic diagram of a connection structure between a metallized film laminate and a metal spraying layer according to a fourth embodiment;

FIG. 9 is a schematic structural view of a fifth embodiment of a metallized film laminate of the present utility model;

FIG. 10 is a schematic diagram showing a connection structure between a metallized film laminate and a metal spraying layer according to a fifth embodiment;

FIG. 11 is a schematic structural view of a sixth embodiment of a metallized film laminate of the present utility model;

FIG. 12 is a schematic structural view of a seventh embodiment of a metallized film laminate of the present utility model;

FIG. 13 is a schematic diagram showing a connection structure between a metallized film laminate and a metal spraying layer according to a seventh embodiment;

FIG. 14 is a schematic view of the structure of an eighth embodiment of a metallized film laminate of the present utility model;

Reference numerals illustrate:

a metallized film laminate 100; a first film body 10; a first dielectric film 11; a thickened region 12; an active area 13; a first blank area 14; a metal plating block 15; a first plating region 16; a second film body 20; a second dielectric film 21; a second plating region 22; a second blank area 23; and (5) a metal spraying layer 200.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a metallized film for improving the bonding strength of a capacitor element and a metal spraying layer.

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

In the embodiment of the utility model, the metallized film for improving the bonding strength of the capacitor element and the metal spraying layer comprises two film bodies, wherein the two film bodies are overlapped to form a metallized film laminated body 100, the two ends of the metallized film laminated body 100 are metal spraying areas, the metal spraying areas comprise metal coating blocks 15 and thickening areas 12 which are positioned correspondingly and are arranged on the two sides of the film bodies, and the two metal spraying areas are arranged on the same film body or are respectively arranged on the two film bodies.

The traditional metallized film is only provided with a coating thickening area at the position of the dielectric film close to the edge, when the metallized film is wound into a core to spray metal, the metal spraying layer is only combined with the coating thickening area, the problem of small combination area exists, and the problem of easy falling off is caused, so that the performance of the capacitor is influenced. According to the utility model, the metal coating block 15 is arranged on the back of the thickening area 12, the positions of the metal coating block 15 and the metal coating block are corresponding to each other and are aligned with the edge of the dielectric film, when metal spraying is carried out, the metal spraying area formed by the metal coating block 15 and the thickening area 12 can enlarge the bonding area, and the connection strength of the capacitor element and the metal spraying layer is greatly improved, so that the problem that the element metal spraying layer is partially fallen off in the production process of the capacitor can be effectively solved, and the failure rate of the capacitor in use is reduced. In the present utility model, the material of the metal plating block 15 is aluminum or zinc-aluminum alloy, and is formed by vapor deposition, and on the premise of meeting the requirements of the creepage distance of the blank area and the size of the capacitor, the larger the width w of the metal plating block 15 is, the better, and the design range of w is usually 0.2-5.0 mm.

The technical scheme of the utility model comprises two film bodies which are overlapped and form a metallized film laminated body 100, wherein one side of the film body forms a thickened area 12 through vapor deposition, the other side forms a metal plating layer block 15 through vapor deposition at the position corresponding to the thickened area 12, and the thickened area 12 and the metal plating layer block 15 form a metal spraying area combined with a metal spraying layer, so that the combination capacity is enhanced.

The utility model is further illustrated by eight examples.

The first embodiment to the fourth embodiment of the present utility model are all single-sided plating, both the two film bodies are vapor-plated with metal plating layers, and the two metal spraying areas may be disposed on the same film body or disposed on the two film bodies respectively according to different forms of the metal plating layers.

The first embodiment of the present utility model is a single-sided plated, single-string metallized film laminate 100, as shown in fig. 1, which is a schematic structural diagram of the metallized film laminate 100, fig. 2, which is a schematic structural diagram of the connection between the metallized film laminate 100 and the metal spraying layer 200, and fig. 2, which is a bonding position. Two film bodies are defined as a first film body 10 and a second film body 20, the structure of the first film body 10 is the same as that of the second film body 20, the first film body 10 comprises a first dielectric film 11, two sides of the first dielectric film 11 are respectively provided with a first surface and a second surface, a thickening area 12, a movable area 13 and a first blank area 14 are sequentially formed on the first surface, and a metal coating block 15 is arranged on the second surface and corresponds to the thickening area 12 in position. The two metal spraying units in this embodiment are respectively disposed on the two film bodies.

In the second embodiment of the present utility model, a single-sided plated, three-string metallized film laminate 100 is shown in fig. 3, which is a schematic structural diagram of the metallized film laminate 100, fig. 4 is a schematic structural diagram of the connection between the metallized film laminate 100 and the metal spraying layer 200, and the thickened positions in fig. 4 are bonding positions. The second embodiment differs from the first embodiment in that the active area 13 is disconnected and another first blank area 14 is formed, thereby realizing three capacitors in series. Other structures of this embodiment are the same as those of the first embodiment, and will not be described here.

In the third embodiment of the present utility model, a single-sided plated, two-string metallized film laminate 100 is shown in fig. 5, which is a schematic structural diagram of the metallized film laminate 100, fig. 6 is a schematic structural diagram of the connection between the metallized film laminate 100 and the metal spraying layer 200, and the thickened position in fig. 6 is a bonding position. Defining two film bodies as a first film body 10 and a second film body 20, wherein the structure of the first film body 10 is different from that of the second film body 20, the first film body 10 comprises a first dielectric film 11, two sides of the first dielectric film 11 are respectively provided with a first surface and a second surface, the first surface is provided with a thickened area 12, an active area 13 and a first blank area 14, the thickened areas 12 are two and symmetrically arranged at two ends of the first surface, at least two active areas 13 are arranged between the two thickened areas 12, the active areas 13 are connected with the thickened areas 12, a first blank area 14 is formed between the two adjacent active areas 13, two metal plating blocks 15 are arranged on the second surface and respectively correspond to the two thickened areas 12, the second film body 20 comprises a second dielectric film 2121, one side of the second dielectric film 2121 facing the first film body 10 is provided with a second plating area and a second blank area 23, and the second blank area 23 is two and is arranged at two opposite sides of the second plating area. In this embodiment, the two metal spraying areas are located on the same film body.

In the fourth embodiment of the present utility model, a single-sided plated, four-string metallized film laminate 100 is shown in fig. 7, which is a schematic structural diagram of the metallized film laminate 100, fig. 8, which is a schematic structural diagram of the connection between the metallized film laminate 100 and the metal spraying layer 200, and fig. 8, which is a bonding position. The fourth embodiment differs from the third embodiment in that the second plating region is provided in a disconnected manner and another second blank region 23 is formed, thereby realizing four capacitors connected in series. Other structures of this embodiment are the same as those of the third embodiment, and will not be described here.

In the fifth to eighth embodiments of the present utility model, one of the film bodies is double-sided plating, and the other film body is a dielectric film with no vapor plating, i.e. two metal spraying areas are located on the same film body.

In the fifth embodiment of the present utility model, a metallized film laminate 100 is double-sided plated, single-string, and as shown in fig. 9, the metallized film laminate 100 is schematically structured, fig. 10 is schematically structured for connecting the metallized film laminate 100 and the metal spraying layer 200, and the thickened position in fig. 10 is a bonding position. Two films are defined as a first film 10 and a second film 20, the structure of the first film 10 is different from that of the second film 20, two metal coating blocks 15 are arranged on the first film 10, and the second film 20 is a second dielectric film 2121. The first film body 10 includes a first dielectric film 11, two sides of the first dielectric film 11 are a first surface and a second surface, and the first surface and the second surface are sequentially provided with a thickening area 12, an active area 13, a first blank area 14 and a metal plating block 15. The first film body 10 of this embodiment is of an asymmetric structure, two ends of the first surface respectively form a thickened area 12 and a metal coating area, the second surface is provided with the metal coating area at a position corresponding to the thickened area 12 of the first surface, and the thickened area 12 is provided at a position corresponding to the metal coating area of the first surface.

A sixth embodiment of the present utility model is a double-sided, three-string metallized film laminate 100, as shown in fig. 11, which is a schematic structural diagram of the metallized film laminate 100, and differs from the fifth embodiment in that the active area 13 is disconnected and another first blank area 14 is formed, thereby realizing three capacitors connected in series. The other structures of this embodiment are the same as those of the fifth embodiment, and will not be described here.

In the seventh embodiment of the present utility model, a metallized film laminate 100 is formed by double-sided plating and three strings, as shown in fig. 12, which is a schematic structural diagram of the metallized film laminate 100, fig. 13 is a schematic structural diagram of the connection between the metallized film laminate 100 and the metal spraying layer 200, and the thickened position in fig. 13 is a bonding position. Defining two membrane bodies as a first membrane body 10 and a second membrane body 20, wherein the first membrane body 10 comprises a first dielectric film 11, two sides of the first dielectric film 11 are respectively provided with a first surface and a second surface, the first surface is provided with a thickening area 12, an active area 13 and a first blank area 14, the thickening area 12 is two and symmetrically arranged at two ends of the first surface, the active area 13 is two and is arranged between the two thickening areas 12, the active area 13 is connected with the thickening area 12, a first blank area 14 is formed between the two active areas 13, two metal coating blocks 15 are arranged on the second surface and respectively correspond to the two thickening areas 12, a first coating area 16 is arranged between the two metal coating blocks 15, and the first blank area 14 is formed between the first coating area 16 and the metal coating blocks 15. The first film body 10 of this embodiment is of a symmetrical structure, the two ends of the first surface are both thickened areas 12, the two ends of the second surface are both metal plating blocks 15, and the thickened areas 12 correspond to the positions of the metal plating areas.

In the eighth embodiment of the present utility model, a metallized film laminate 100 with two sides plated and four strings is shown in fig. 14, and two differences between the metallized film laminate 100 and the seventh embodiment are shown, the first difference is that three active areas 13 are provided on the first side, the first and the last active areas 13 are respectively connected with a thickening area 12, and a first blank area 14 is formed between two adjacent active areas 13; the second difference is that the first plating area 16 provided on the second side is disconnected and another first blank area 14 is formed, thereby realizing the series connection of four capacitors. The other structures of this embodiment are the same as those of the seventh embodiment, and will not be described here.

In the above embodiments, the metal spraying regions combined with the metal spraying layers are formed at both ends of the metallized film laminate 100, so as to enhance the metal spraying combining capability, the metallized film laminate 100 is formed by overlapping two film bodies, and the two metal spraying regions may be disposed on the same film body or may be disposed on the two film bodies respectively according to the difference of single-sided plating, double-sided plating and inner-cluster number.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. The metallized film for improving the bonding strength of the capacitor element and the metal spraying layer comprises two film bodies, wherein the two film bodies are overlapped to form a metallized film laminated body.

2. The metallized film for improving bonding strength of capacitor element and metal spraying layer according to claim 1, wherein two film bodies are defined as a first film body and a second film body, the structure of the first film body is identical to that of the second film body, the first film body comprises a first dielectric film, two sides of the first dielectric film are respectively a first surface and a second surface, the first surface is sequentially provided with a thickening area, a movable area and a first blank area, and the metal coating block is arranged on the second surface and corresponds to the position of the thickening area.

3. The metallized film for increasing the bonding strength of a capacitor element to a metallization layer as defined in claim 2, wherein said active region is broken and another of said first blank areas is formed.

4. The metallized film for improving bonding strength of capacitor element and metal spraying layer according to claim 1, wherein two film bodies are defined as a first film body and a second film body, the structure of the first film body is different from that of the second film body, the first film body comprises a first dielectric film, two sides of the first dielectric film are respectively provided with a first surface and a second surface, the first surface is provided with a thickened area, an active area and a first blank area, the thickened areas are symmetrically arranged at two ends of the first surface, at least two active areas are arranged between the two thickened areas, the active area is connected with the thickened area, the first blank area is formed between two adjacent active areas, two metal coating blocks are arranged on the second surface and respectively correspond to the two thickened areas, the second film body comprises a second dielectric film, one side of the second dielectric film, which faces the first film body, is provided with a second coating layer and two second blank areas, and two blank areas are arranged at two opposite sides of the second dielectric film.

5. The metallized film for increasing the bonding strength of a capacitor element to a metal sprayed layer of claim 4, wherein said second plated region is broken and another said second blank area is formed.

6. The metallized film for improving bonding strength of capacitor element and metal spraying layer according to claim 1, wherein two films are defined as a first film and a second film, the structure of the first film is different from that of the second film, two metal coating blocks are arranged on the first film, and the second film is a second dielectric film.

7. The metallized film for improving bonding strength of capacitor element and metal spraying layer according to claim 6, wherein said first film body comprises a first dielectric film, two sides of said first dielectric film are respectively provided with a first surface and a second surface, said first surface and said second surface are sequentially provided with said thickened area, an active area, a first blank area and said metal coating block.

8. The metallized film for increasing the bonding strength of a capacitor element to a metallization layer as defined in claim 7, wherein said active region is broken and another of said first blank areas is formed.

9. The metallized film for improving bonding strength of capacitor element and metal spraying layer according to claim 6, wherein said first film body comprises a first dielectric film, two sides of said first dielectric film are respectively provided with a first surface and a second surface, said first surface is provided with said thickened area, an active area and a first blank area, said thickened area is provided with two symmetrical parts and is provided with two ends of said first surface, said active area is provided with at least two parts and is provided between said thickened areas, said active area is connected with said thickened area, said first blank area is formed between two adjacent active areas, said two metal coating blocks are provided on said second surface and respectively correspond to said two thickened areas, a first coating area is provided between said two metal coating blocks, and a first blank area is formed between said first coating area and said metal coating blocks.

10. The metallized film for increasing the bonding strength of a capacitor element to a metallization layer of claim 9, wherein said first plated region is broken and another of said first blank areas is formed.