Metallized film and metallized film capacitor

Abstract

The utility model discloses a metalized film and a metalized film capacitor, the metalized film comprises a first dielectric film and a first metal coating, the first metal coating is evaporated on the first dielectric film, the first metal coating comprises a first transverse grid margin and a first longitudinal grid margin, and the first transverse grid margin and the first longitudinal grid margin are arranged on the first dielectric film. The first metal coating area is divided into a plurality of first continuous grids extending in the longitudinal direction by the first transverse grid reserved edges, and first transverse fuses are arranged on the first transverse grid reserved edges so as to be communicated with the first continuous grids; the first longitudinal grid reserved edges are arranged in a staggered mode in the longitudinal direction, and first longitudinal fuses are arranged on the first longitudinal grid reserved edges. Therefore, by longitudinally staggering the positions of the fuses, rapid rising of the temperature on the same side of the capacitor is avoided, and the risk of continuous fusing of the fuses on the same side of the capacitor is reduced.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to a metallized film and a metallized thin film capacitor. Background Technology

[0002] With the rapid development of metallized film capacitor technology, the safety requirements for metallized film capacitors are becoming increasingly stringent. The safety film design in metallized films has been widely applied to metallized safety film capacitors in various applications.

[0003] The safety film design consists of a grid of interconnected fuses. During application, when the current flowing through the metallized safety film fuse is too large, the fuse will rapidly heat up until it reaches its melting point. Once the fuse melts, there will be no more connecting paths within the grid cells, and the current cannot continue to flow, thus protecting the other grid cells of the metallized safety film capacitor from further self-healing and breakdown.

[0004] The existing safety film design uses a longitudinally symmetrical fuse design. When the fuse blows, the temperature on one side of the capacitor rises. When multiple fuses blow, the heat from the melting is concentrated on one side, which may cause a chain reaction. The probability of the fuse blowing again increases, resulting in a sharp drop in the capacitance of the metallized safety film capacitor. Utility Model Content

[0005] This invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, one objective of this invention is to provide a metallized film that, by longitudinally staggering the positions of the fuses, prevents a rapid temperature rise on the same side of the capacitor, thereby reducing the risk of consecutive fuse blowouts on the same side of the capacitor.

[0006] To achieve the above objectives, this utility model provides a metallized film, comprising a first dielectric film and a first metal coating. The first metal coating is deposited on the first dielectric film. The first metal coating includes: a first transverse grid edge, which divides the first metal coating into a plurality of first continuous grids extending longitudinally, and a first transverse fuse is provided on the first transverse grid edge to connect the plurality of first continuous grids; and a first longitudinal grid edge, which is staggered longitudinally and a first longitudinal fuse is provided on the first longitudinal grid edge.

[0007] The metallization film proposed according to the embodiments of this utility model includes a first dielectric film and a first metal coating. The first metal coating is deposited on the first dielectric film. The first metal coating includes a first transverse grid edge and a first longitudinal grid edge. The first transverse grid edge divides the first metal coating into a plurality of first continuous grids extending longitudinally. A first transverse fuse is provided on the first transverse grid edge to connect the plurality of first continuous grids. The first longitudinal grid edge is staggered longitudinally and a first longitudinal fuse is provided on the first longitudinal grid edge. Thus, by staggering the fuse positions longitudinally, the temperature on the same side of the capacitor is prevented from rising rapidly, thereby reducing the risk of continuous melting of fuses on the same side of the capacitor.

[0008] In addition, the metallized film proposed above according to the embodiments of this utility model may also have the following additional technical features:

[0009] Optionally, the first metal coating further includes a first edge, which is disposed in the middle of the first metal coating to divide the first metal coating into two rows of multiple first continuous grids along the longitudinal direction.

[0010] Optionally, the first vertical grid edge is spaced apart between the first continuous grid in the first row and the first continuous grid in the second row, and is staggered between the multiple first continuous grids in the two rows.

[0011] Optionally, at least one first longitudinal fuse is provided in the middle of each first longitudinal grid edge.

[0012] Optionally, a first transverse fuse is provided on both sides of each first transverse grid edge.

[0013] To achieve the above objectives, a second aspect of this utility model provides a metallized thin-film capacitor, including a capacitor element, wherein the capacitor element is formed by staggered stacking and rolling of a first metallized film and a second metallized film, wherein the first metallized film includes the metallized film as described above.

[0014] In addition, the metallized thin-film capacitor proposed above according to the embodiments of this utility model may also have the following additional technical features:

[0015] Optionally, the second metallized film includes a second dielectric film and a second metal coating. The second metal coating is deposited on the second dielectric film. The second metal coating includes: a second transverse grid edge that divides the second metal coating into a plurality of second continuous grids extending longitudinally, and a second transverse fuse is provided on the second transverse grid edge to connect the plurality of second continuous grids; and a second longitudinal grid edge that is arranged longitudinally and a second longitudinal fuse is provided on the second longitudinal grid edge.

[0016] Optionally, the second metal coating further includes a second edge, with the second edge provided on both sides of the second metal coating.

[0017] Optionally, a second longitudinal fuse is provided on both sides of each second transverse grid edge. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the metallized film according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a metallized thin-film capacitor according to an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A schematic diagram of the structure of the second metallization film in one embodiment;

[0021] Figure 4 for Figure 2 A schematic diagram of the structure of the second metallization film in another embodiment.

[0022] Label Explanation

[0023] First dielectric thin film 1;

[0024] 2. First metal plating layer; 21. First horizontal grid edge; 22. First continuous grid; 23. First horizontal fuse; 24. First vertical grid edge; 25. First vertical fuse; 26. First edge.

[0025] First metallization film 100, second metallization film 200;

[0026] Second dielectric thin film 3;

[0027] 4. Second metal plating layer, 41. Second horizontal grid edge, 42. Second continuous grid, 43. Second horizontal fuse, 44. Second vertical grid edge, 45. Second vertical fuse, 46. Second edge. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] The metallized film and metallized thin-film capacitor of the present invention will now be described with reference to the accompanying drawings.

[0032] This utility model defines the film width direction as transverse, the corresponding gap as transverse grid edge, the direction orthogonal to it as longitudinal, the corresponding gap as longitudinal grid edge, each column of transverse grid edge is repeated at equal intervals along the longitudinal direction, intersecting with the longitudinal grid edge to form longitudinal electrode and grid; the longitudinal electrode and grid are provided with vapor-deposited metal layer inside, the edge is not provided with vapor-deposited metal layer, the vapor-deposited metal set at the longitudinal grid edge to connect the grid and the longitudinal electrode is a fuse, the vapor-deposited metal set at the transverse grid edge to connect the two grids is a fuse.

[0033] like Figure 1 As shown, the metallization film proposed in this embodiment of the present invention includes a first dielectric film 1 and a first metal coating 2. The first metal coating 2 is deposited on the first dielectric film 1 by vapor deposition. The first metal coating 2 includes a first transverse grid edge 21, a first transverse fuse 23, a first longitudinal grid edge 24, and a first longitudinal fuse 25.

[0034] The first transverse grid edge 21 divides the first metal plating layer 2 into multiple first continuous grids 22 extending longitudinally. A first transverse fuse 23 is provided on the first transverse grid edge 21 to connect the multiple first continuous grids 22. The first longitudinal grid edge 24 is staggered longitudinally and a first longitudinal fuse 25 is provided on the first longitudinal grid edge 24.

[0035] In other words, when the first longitudinal fuse of a grid blows, the temperature on one side of the capacitor rises. When multiple longitudinal fuses of multiple grids blow, the heat from the melting is distributed to both sides of the capacitor, reducing the risk of the fuse blowing again and thus preventing a sharp drop in the capacitance of the metallized film capacitor.

[0036] As an example, the first metal coating 2 further includes a first edge 26, which is disposed in the middle of the first metal coating 2 to divide the first metal coating 2 into two rows of multiple first continuous grids 22 along the longitudinal direction.

[0037] It should be noted that the first blank space 26 in the middle (i.e. the part without the vapor-deposited metal layer) can serve as a thermal insulation zone, further reducing the possibility of heat transfer from one grid to adjacent cells.

[0038] As an example, the first vertical grid edge 24 is spaced apart between the first continuous grid in the first row and the first continuous grid in the second row, and is staggered between the multiple first continuous grids in the two rows.

[0039] As an example, at least one first longitudinal fuse 25 is provided in the middle of each first longitudinal grid edge 24.

[0040] In other words, this application does not specifically limit the number of the first longitudinal grid edges 24 that are staggered in the left and right rows and the number of the first longitudinal fuses 25 that are set on each of the first longitudinal grid edges 24.

[0041] Specifically, after the first blank space 26 divides the first metal plating layer 2 into two rows of multiple first continuous grids 22 along the longitudinal direction, at least one first longitudinal grid edge 24 can be set on each of the first continuous grids in the first row on the left, and at least one first longitudinal grid edge 24 can also be set on each of the first continuous grids in the second row on the right, and they are staggered between the two rows of multiple first continuous grids.

[0042] As an example, each first horizontal grid edge 21 is provided with a first horizontal fuse 23 on both sides.

[0043] It should be noted that by setting the first horizontal fuse 23 on both sides of the first horizontal grid edge 21 to prevent moisture from entering the first horizontal grid edge 21 channel from the first blank space 26, the risk of further self-healing, arcing, and corrosion is prevented, thereby improving the moisture resistance of the capacitor.

[0044] In summary, the metallization film proposed according to the embodiments of this utility model includes a first dielectric film and a first metal coating. The first metal coating is deposited on the first dielectric film. The first metal coating includes a first transverse grid edge and a first longitudinal grid edge. The first transverse grid edge divides the first metal coating into a plurality of first continuous grids extending longitudinally. A first transverse fuse is provided on the first transverse grid edge to connect the plurality of first continuous grids. The first longitudinal grid edge is staggered longitudinally and a first longitudinal fuse is provided on the first longitudinal grid edge. Thus, by staggering the fuse positions longitudinally, the rapid temperature rise on the same side of the capacitor is avoided, thereby reducing the risk of continuous melting of fuses on the same side of the capacitor.

[0045] In addition, such as Figure 2 As shown, this utility model also proposes a metallized film capacitor, including a capacitor element, which is formed by staggered stacking and rolling of a first metallized film 100 and a second metallized film 200, wherein the first metallized film 100 includes the metallized film as described above.

[0046] As an example, such as Figure 3 As shown, the second metallization film 200 includes a second dielectric film 3 and a second metal coating 4. The second metal coating 4 is deposited on the second dielectric film 3. The second metal coating 4 includes: a second transverse grid edge 41 and a second longitudinal grid edge 44. The second transverse grid edge 41 divides the second metal coating 4 into a plurality of second continuous grids 42 extending longitudinally. A second transverse fuse 43 is provided on the second transverse grid edge 41 to connect the plurality of second continuous grids 42. The second longitudinal grid edge 44 is arranged longitudinally and a second longitudinal fuse 45 is provided on the second longitudinal grid edge 44.

[0047] As an example, the second metal coating 4 also includes a second edge 46, and the second metal coating 4 has a second edge 46 on both sides.

[0048] As an example, a second longitudinal fuse 45 is provided on both sides of each second transverse grid edge 41.

[0049] As one embodiment, the second metallization film 200 further includes a second dielectric film 3 and a second metal plating layer 4, the second metal plating layer 4 being deposited on the second dielectric film 3, wherein the second metal plating layer 4 is as follows: Figure 4 As shown, a second margin 46 is provided on both sides.

[0050] Therefore, by longitudinally staggering the positions of the fuses, the rapid temperature rise on the same side of the capacitor is avoided, thereby reducing the risk of consecutive fuse blowouts on the same side of the capacitor.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A metallized film, characterized in that, It includes a first dielectric thin film and a first metal coating, wherein the first metal coating is deposited on the first dielectric thin film, and the first metal coating includes: The first horizontal grid edge divides the first metal plating layer into a plurality of first continuous grids extending longitudinally. A first horizontal fuse is provided on the first horizontal grid edge to connect the plurality of first continuous grids. The first vertical grid edge is offset along the vertical direction, and a first vertical fuse is provided on the first vertical grid edge.

2. The metallized film as described in claim 1, characterized in that, The first metal coating also includes a first edge, which is disposed in the middle of the first metal coating to divide the first metal coating into two rows of multiple first continuous grids along the longitudinal direction.

3. The metallized film as described in claim 2, characterized in that, The first vertical grid edge is set at intervals between the first continuous grid in the first row and the first continuous grid in the second row, and is staggered between multiple first continuous grids in the two rows.

4. The metallized film as described in claim 3, characterized in that, At least one first longitudinal fuse is provided in the middle of each first longitudinal grid edge.

5. The metallized film as described in claim 4, characterized in that, Each first horizontal grid edge is provided with a first horizontal fuse on both sides.

6. A metallized thin-film capacitor, characterized in that, The metallized film capacitor includes a capacitor element, which is formed by staggered stacking and rolling of a first metallized film and a second metallized film, wherein the first metallized film includes the metallized film as described in any one of claims 1 to 5.

7. The metallized thin-film capacitor as claimed in claim 6, characterized in that, The second metallization film includes a second dielectric film and a second metal coating. The second metal coating is deposited on the second dielectric film. The second metal coating includes: a second transverse grid edge, which divides the second metal coating into a plurality of second continuous grids extending longitudinally, and a second transverse fuse is provided on the second transverse grid edge to connect the plurality of second continuous grids; and a second longitudinal grid edge, which is arranged longitudinally and a second longitudinal fuse is provided on the second longitudinal grid edge.

8. The metallized thin-film capacitor as claimed in claim 7, characterized in that, The second metal coating also includes a second edge, and the second metal coating has a second edge on both sides.

9. The metallized thin-film capacitor as claimed in claim 8, characterized in that, Each second horizontal grid edge is provided with a second vertical fuse on both sides.

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