Explosion-proof metallized film

Abstract

The utility model provides an explosion-proof metallized film, a conductive grid in a first conductive grid area and a conductive grid in a second conductive grid area are electrically connected with a grid edge part, and the grid edge part, the conductive grid in the first conductive grid area and the conductive grid in the second conductive grid area are all made of metallized filaments. A fuse is arranged at the joint of each grid in the first conductive grid area and the grid edge part, a fuse is also arranged at the joint of each grid in the second conductive grid area, and when the current value of the capacitor is normal, the first conductive grid area and the second conductive grid area are communicated with each other; when the current value of the capacitor reaches a specific threshold value, the fuses at all positions are fused due to self-heating, so that the polar plate units where the breakdown points are located are integrally isolated from the polar plates of the capacitor, large inrush current is effectively prevented from entering the breakdown points, the problems of multi-layer medium continuous breakdown and large-area burn possibly caused by continuous self-healing breakdown are avoided, and the service life of the capacitor is prolonged. And the safety of the capacitor in the self-healing process is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of capacitor metallization film technology, and particularly relates to an explosion-proof metallization film. Background Technology

[0002] Metallization films for capacitors are formed by depositing metals such as zinc and aluminum onto an organic dielectric film using a physical vapor deposition method, thus creating the metal plates in the capacitor structure. The structure of the metallization layer, especially its thickness, affects the operating voltage, ESR, loss, and lifespan of the metallized film capacitor. Therefore, controlling the thickness of the metallization layer is a key aspect of manufacturing metallized films for capacitors.

[0003] In existing capacitors, the metallization film is designed to prevent explosion during the capacitor's self-healing process. However, once a self-healing breakdown occurs, the current will quickly break down the metallization film, which cannot effectively prevent a large inrush current from breaking down the metallization film and causing an explosion. Therefore, this invention proposes an explosion-proof metallization film to solve the above problems. Utility Model Content

[0004] This invention provides an explosion-proof metallized film, which aims to solve the problems mentioned in the background art.

[0005] This utility model is achieved as follows: an explosion-proof metallized film, comprising a base layer and a blank layer;

[0006] A metallized film layer is provided between the base layer and the blank layer. A grid explosion-proof zone is provided on the metallized film layer. The grid explosion-proof zone is composed of multiple grids. The grid explosion-proof zone is divided into a first conductive grid zone and a second conductive grid zone by the upper and lower mesh edges. A fuse is provided at the connection between each grid in the first conductive grid zone and the mesh edge. The fuse is also provided at the connection between each grid in the second conductive grid zone.

[0007] Preferably, the conductive meshes in the first conductive mesh area and the conductive meshes in the second conductive mesh area are electrically connected to the mesh edge.

[0008] Preferably, the edge portion of the mesh, the conductive mesh in the first conductive mesh area, and the conductive mesh in the second conductive mesh area are all made of metallized filaments.

[0009] Preferably, the fuse will melt due to its own heat.

[0010] Preferably, the area ratio of the blank layer to the metallized film layer is 2:3.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The conductive meshes in the first and second conductive mesh areas are electrically connected to the mesh edge. The mesh edge, the conductive meshes in the first and second conductive mesh areas are all made of metallized filaments. Each mesh in the first conductive mesh area is equipped with a fuse at the connection point with the mesh edge, and each mesh in the second conductive mesh area is also equipped with a fuse at the connection point between them. When the capacitor current is working normally, the first and second conductive mesh areas are interconnected. When the capacitor current reaches a specific threshold, the fuses at each location melt due to their own heating, thereby isolating the plate unit where the breakdown point is located from the capacitor plate as a whole. This effectively prevents large inrush current from entering the breakdown point, avoids the problem of continuous breakdown of multiple dielectric layers and large-area burns that may be caused by continuous self-healing breakdown, and ensures the safety of the capacitor during the self-healing process. Attached Figure Description

[0013] Figure 1 This is a front view of the overall structure of this utility model.

[0014] Figure 2 This is a front sectional view of the overall structure of this utility model.

[0015] In the picture:

[0016] 1. Base layer; 2. Metallized film layer; 3. Mesh edge; 4. First conductive mesh area; 5. Second conductive mesh area; 6. Blank layer; 7. Fuse. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0018] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0019] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figures 1 to 2 This utility model provides a technical solution: an explosion-proof metallized film, including a base layer 1 and a blank layer 6; a metallized film layer 2 is provided between the base layer 1 and the blank layer 6, and a grid explosion-proof area is provided on the metallized film layer 2. The grid explosion-proof area is composed of multiple grids, and the grid explosion-proof area is divided into a first conductive grid area 4 and a second conductive grid area 5 by upper and lower mesh edges 3. A fuse 7 is provided at the connection between each grid in the first conductive grid area 4 and the mesh edge 3, and a fuse 7 is also provided at the connection between each grid in the second conductive grid area 5.

[0023] Furthermore, the conductive mesh in the first conductive mesh area 4 and the conductive mesh in the second conductive mesh area 5 are electrically connected to the mesh edge 3.

[0024] Furthermore, the conductive meshes in the edge portion 3, the first conductive mesh area 4, and the second conductive mesh area 5 are all made of metallized filaments.

[0025] In this embodiment, refer to the appendix. Figure 2The conductive meshes in the first conductive mesh area 4 and the second conductive mesh area 5 are electrically connected to the mesh edge 3. The mesh edge 3, the conductive meshes in the first conductive mesh area 4, and the conductive meshes in the second conductive mesh area 5 are all made of metallized filaments. Each mesh in the first conductive mesh area 4 is equipped with a fuse 7 at the connection point with the mesh edge 3, and each mesh in the second conductive mesh area 5 is also equipped with a fuse 7 at the connection point between them. When the capacitor current value is normal, the first conductive mesh area 4 and the second conductive mesh area 5 are interconnected. When the capacitor current value reaches a specific threshold, the fuses 7 at each location melt due to their own heating, thereby isolating the plate unit where the breakdown point is located from the capacitor plate as a whole. This effectively prevents large inrush current from entering the breakdown point, avoids the problem of continuous breakdown of multiple dielectric layers and large-area burns that may be caused by continuous self-healing breakdown, and ensures the safety of the capacitor during the self-healing process.

[0026] Furthermore, fuse 7 will melt due to its own heat.

[0027] In this embodiment, when the capacitor current reaches a specific threshold, the resistance between each path will generate heat, and the fuses 7 at each location will melt due to their own heat, thereby isolating the plate unit where the breakdown point is located from the capacitor plate as a whole. This effectively prevents large inrush current from entering the breakdown point, avoids the problem of continuous breakdown of multiple dielectric layers and large-area burns that may be caused by continuous self-healing breakdown, and ensures the safety of the capacitor during the self-healing process.

[0028] Furthermore, the area ratio of the blank layer 6 to the metallized film layer 2 is 2:3.

[0029] In this embodiment, the area ratio of the blank layer 6 to the metallized film layer 2 is 2:3, which avoids the problem of excessively large grid areas in the metallized film layer 2 and poor flow capacity.

[0030] The working principle and usage process of this utility model are as follows: The conductive mesh in the first conductive mesh area 4 and the conductive mesh in the second conductive mesh area 5 are electrically connected to the mesh edge 3. The mesh edge 3, the conductive mesh in the first conductive mesh area 4, and the conductive mesh in the second conductive mesh area 5 are all made of metallized filaments. Each mesh in the first conductive mesh area 4 is provided with a fuse 7 at the connection point with the mesh edge 3, and each mesh in the second conductive mesh area 5 is also provided with a fuse 7 at the connection point between them. When the capacitor current value is normal, the first conductive mesh area 4 and the second conductive mesh area 5 are interconnected. When the capacitor current value reaches a specific threshold, the fuses 7 at each location melt due to their own heating, thereby isolating the plate unit where the breakdown point is located from the capacitor plate as a whole. This effectively prevents large inrush current from entering the breakdown point, avoids the problem of continuous breakdown of multiple dielectric layers and large-area burns that may be caused by continuous self-healing breakdown, and ensures the safety of the capacitor during the self-healing process.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An explosion-proof metallized film, characterized in that: Includes the base layer (1) and the blank layer (6); A metallized film layer (2) is provided between the base layer (1) and the blank layer (6). A grid explosion-proof zone is provided on the metallized film layer (2). The grid explosion-proof zone is composed of multiple grids. The grid explosion-proof zone is divided into a first conductive grid zone (4) and a second conductive grid zone (5) by upper and lower mesh edges (3). A fuse (7) is provided at the connection between each grid in the first conductive grid zone (4) and the mesh edge (3). The fuse (7) is also provided at the connection between each grid in the second conductive grid zone (5).

2. The explosion-proof metallized film according to claim 1, characterized in that: The conductive mesh in the first conductive mesh area (4) and the conductive mesh in the second conductive mesh area (5) are electrically connected to the mesh edge (3).

3. The explosion-proof metallized film according to claim 2, characterized in that: The conductive meshes in the edge portion (3), the first conductive mesh area (4), and the second conductive mesh area (5) are all made of metallized filaments.

4. The explosion-proof metallized film according to claim 1, characterized in that: The fuse (7) will melt due to its own heat.

5. The explosion-proof metallized film according to claim 1, characterized in that: The area ratio of the blank layer (6) to the metallized film layer (2) is 2:3.

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