High-voltage metallized film capacitor

Abstract

According to the high-voltage metallized film capacitor provided by the utility model, the outermost part of the capacitor is provided with the isolation layer, and the isolation layer can be made of a plastic film with good sealing performance, thereby achieving the effect of isolating moisture, preventing the capacitor from being in a high-humidity environment, and reducing the leakage current of the capacitor. The wrapping head assembly is used for protecting the two ends of the capacitor and comprises a sealing sleeve, a buffer plate and an anti-collision plate, the sealing sleeve can be made of PVC materials, the buffer plate can be made of sponge, the anti-collision plate can be made of acrylic plates, and the two ends of the capacitor are supported and protected. The heat conduction assembly comprises a heat conduction glue layer and a heat conduction sheet, the heat conduction glue layer is heat conduction glue, the heat conduction glue layer is coated outside the isolation layer, the heat conduction glue layer not only can play a heat conduction role, but also can further increase the effect of isolating the high-humidity environment of the isolation layer, the heat conduction sheet is arranged on the heat conduction glue layer, and the heat conduction sheet can further dissipate heat; and the heat-conducting glue layer is prevented from being always in a high-temperature environment, heat exchange is accelerated, and heat dissipation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to capacitor technical field, especially relate to a high voltage metallized film capacitor. BACKGROUND

[0002] Thin film capacitor is with metal foil as electrode, it is overlapped from two ends with polyethylene, polypropylene, polystyrene or polycarbonate plastic film, and is wound into the structure of the capacitor of cylindrical shape.

[0003] Through the retrieval, the patent number for the authorization of China CN219800670U discloses a kind of high voltage metallized film capacitor, including capacitor, the center of capacitor is provided with mandrel, and the left and right ends of mandrel respectively extend to the left and right sides of capacitor outside, and the left end of capacitor is provided with left package head structure, and the right end of capacitor is provided with right package head structure;Capacitor is rolled in and has inner film layer, and the inner side of inner film layer is adhered with a layer of first electrode in middle part, and inner film layer adopts polycarbonate film material, and first electrode is set as capacitor inner anode plate;Capacitor is rolled in and has outer film layer, and the inner side of outer film layer is adhered with a layer of second electrode in middle part, and second electrode is set as capacitor inner cathode plate.Capacitor is wrapped in and outer film and electrode plate are not easy to loosen, and capacitor two end heads are wrapped tightly and reliably, and are bump-proof, waterproof and moisture-proof, more durable.

[0004] The above-mentioned comparative document also has the following deficiencies: first, the capacitance value of the thin film capacitor is greatly affected by temperature, as the temperature rises, the capacitance value will change, because the dielectric material of the thin film capacitor will expand and decompose at high temperature, thereby causing the change of the capacitance value; second, the leakage current of the thin film capacitor is large, which is due to the fact that the dielectric material of the capacitor itself has a certain conductivity, in high temperature, high humidity and other environments, the leakage current will further increase, thereby affecting the performance of the circuit; therefore, the utility model provides a kind of high voltage metallized film capacitor to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of high voltage metallized film capacitor, aims at solving the problem of background art.

[0006] The utility model is realized in this way, a kind of high voltage metallized film capacitor, including capacitor, package head subassembly and heat conducting component;

[0007] The center position of the capacitor is provided with mandrel, the two ends of the mandrel extend to the outside of the two ends of the capacitor, the capacitor is rolled in and has inner film layer and outer film layer, the inner film layer and outer film layer are arranged in the interval, and the outer wall of the outer film layer is provided with insulating layer;

[0008] The two package head assemblies are arranged outside the two ends of the capacitor.

[0009] The heat conduction assembly comprises a heat conduction adhesive layer and a heat conduction sheet, the heat conduction adhesive layer is arranged outside the insulation layer, and the heat conduction sheet is arranged on the heat conduction adhesive layer.

[0010] Preferably, the inner side of the inner film layer is provided with a first electrode, and the first electrode is an inner anode plate of the capacitor.

[0011] Preferably, the inner side of the outer film layer is provided with a second electrode, and the second electrode is an inner cathode plate of the capacitor.

[0012] Preferably, both ends of the inner film layer and the outer film layer are provided with a separation edge.

[0013] Preferably, the package head assembly comprises a sealing sleeve, a buffer plate and an anti-collision plate, the sealing sleeve is arranged at the two ends of the capacitor and penetrates the core shaft, the buffer plate is arranged outside the sealing sleeve, and the anti-collision plate is arranged outside the buffer plate.

[0014] Preferably, a plurality of heat conduction sheets are arranged, and the plurality of heat conduction sheets are distributed at intervals along the extension direction of the heat conduction adhesive layer.

[0015] Compared with the prior art, the capacitor has the advantages that:

[0016] 1. The capacitor is provided with an insulation layer outside, the insulation layer can be made of plastic film with good sealing property, can play a role in isolating moisture, can avoid the capacitor being in a high-humidity environment, and can reduce the occurrence of capacitor leakage current.

[0017] 2. The package head assembly is used for protecting the two ends of the capacitor, and comprises a sealing sleeve, a buffer plate and an anti-collision plate, the sealing sleeve can be made of PVC material, the buffer plate can be made of sponge, and the anti-collision plate can be made of acrylic plate, so that the two ends of the capacitor are supported and protected.

[0018] 3. The heat conduction assembly comprises a heat conduction adhesive layer and a heat conduction sheet, the heat conduction adhesive layer is made of heat conduction adhesive, the heat conduction adhesive layer is coated outside the insulation layer, the heat conduction adhesive layer can not only play a role in heat conduction, but also can further increase the role of the insulation layer in isolating a high-humidity environment, the heat conduction sheet is arranged on the heat conduction adhesive layer, the heat conduction sheet can further dissipate heat, and the heat conduction adhesive layer can be prevented from being always in a high-temperature environment, so that heat exchange is accelerated and heat dissipation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the overall structure of the capacitor.

[0020] Figure 2 It is a front view of the overall structure of the capacitor. Figure 1 It is a local enlarged view of A in the middle.

[0021] Figure 3 The whole internal expansion schematic view of the utility model.

[0022] In the drawing:

[0023] 1, capacitor; 11, mandrel; 12, inner film layer; 13, first electrode; 14, insulating layer; 15, outer film layer; 16, second electrode; 17, separation edge;

[0024] 2, head assembly; 21, sealing sleeve; 22, buffer plate; 23, anti-collision plate;

[0025] 3, heat conduction assembly; 31, heat conduction adhesive layer; 32, heat conduction sheet. DETAILED DESCRIPTION

[0026] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment.

[0027] The components of the utility model embodiment generally described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.

[0028] Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of protection of the utility model.

[0029] In the description of the utility model, it is necessary to explain that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the claimed utility model. The device or element must have a particular orientation, a particular orientation and operation, therefore it cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connected, can be two elements inside the communication.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0031] Please refer to Figures 1 to 3 The utility model provides a technical scheme: a kind of high pressure metallized film capacitor, including capacitor 1, head assembly 2 and heat conduction component 3;Capacitor 1 inside center position is equipped with mandrel 11, and the both ends of mandrel 11 extend to the outside of the both ends of capacitor 1, and capacitor 1 is reeled with inner film layer 12 and outer film layer 15, and inner film layer 12 and outer film layer 15 are arranged in inner and outer interval, and the outer wall of outer film layer 15 is equipped with insulating layer 14;Head assembly 2 is equipped with two, and two head assembly 2 are arranged at the both ends outside of capacitor 1;Heat conduction component 3 includes heat conducting adhesive layer 31 and heat conducting sheet 32, and heat conducting adhesive layer 31 is located at the outside of insulating layer 14, and heat conducting sheet 32 is located on heat conducting adhesive layer 31.

[0032] Further, please refer to Figure 3 The inside of inner film layer 12 is equipped with first electrode 13, and first electrode 13 is the inner anode plate of capacitor 1.

[0033] Further, please refer to Figure 3 The inside of outer film layer 15 is equipped with second electrode 16, and second electrode 16 is the inner cathode plate of capacitor 1.

[0034] In the embodiment, the capacitor 1 is internally rolled with an inner film layer 12, and the inner side of the inner film layer 12 is attached with a first electrode 13, wherein the first electrode 13 is an inner anode plate of the capacitor 1, the inner film layer 12 is made of any one of polyethylene, polypropylene, polystyrene and polycarbonate, the capacitor 1 is internally rolled with an outer film layer 15, and the inner side of the outer film layer 15 is attached with a second electrode 16, wherein the second electrode 16 is an inner cathode plate of the capacitor 1, the inner film layer 12 and the outer film layer 15 are arranged in an inner-outer manner, and a separation edge 17 is arranged at both ends of the inner film layer 12 and the outer film layer 15, wherein the separation edge 17 can be made of silica gel, an isolation layer 14 is arranged on the outer wall of the outer film layer 15, the isolation layer 14 can be selected from plastic film with good sealing property, and the isolation layer 14 can play a role of isolating moisture, so as to avoid the capacitor 1 in a high-humidity environment and reduce the occurrence of the capacitor 1 leakage current; the head assembly 2 is used for protecting both ends of the capacitor 1, and includes a sealing sleeve 21, a buffer plate 22 and an anti-collision plate 23, the sealing sleeve 21 is arranged at both ends of the capacitor 1, the buffer plate 22 is arranged outside the sealing sleeve 21, and the anti-collision plate 23 is arranged outside the buffer plate 22, wherein the transverse section of the sealing sleeve 21 and the anti-collision plate 23 is in a U-shaped structure, the buffer plate 22 is located between the sealing sleeve 21 and the anti-collision plate 23, the sealing sleeve 21 can be made of PVC, the buffer plate 22 can be selected from sponge, and the anti-collision plate 23 can be selected from acrylic plate; the heat conduction assembly 3 includes a heat conduction adhesive layer 31 and a heat conduction sheet 32, wherein the heat conduction adhesive layer 31 is heat conduction adhesive, the heat conduction adhesive layer 31 is coated outside the isolation layer 14, the heat conduction adhesive layer 31 can not only play a role of heat conduction, but also further increase the role of the isolation layer 14 in isolating a high-humidity environment, and the heat conduction sheet 32 is arranged on the heat conduction adhesive layer 31, the heat conduction sheet 32 can further dissipate heat, and avoid the heat conduction adhesive layer 31 being always in a high-temperature environment, so as to accelerate heat exchange and facilitate heat dissipation.

[0035] Further, please refer to Figure 3 , the two ends of the inner film layer 12 and the outer film layer 15 are provided with the separation edge 17.

[0036] In the embodiment, the two ends of the inner film layer 12 and the outer film layer 15 are provided with the separation edge 17, wherein the separation edge 17 can be made of silica gel, and the separation edge 17 can ensure the safe use and stability of the capacitor 1.

[0037] Further, please refer to Figure 1 and Figure 2 , the head assembly 2 includes the sealing sleeve 21, the buffer plate 22 and the anti-collision plate 23, the sealing sleeve 21 is arranged at both ends of the capacitor 1 and penetrates the core shaft 11, the buffer plate 22 is arranged outside the sealing sleeve 21, and the anti-collision plate 23 is arranged outside the buffer plate 22.

[0038] In the embodiment, the header assembly 2 comprises a sealing sleeve 21, a buffer plate 22 and a collision prevention plate 23, the sealing sleeve 21 is arranged at both ends of the capacitor 1, the buffer plate 22 is arranged outside the sealing sleeve 21, and the collision prevention plate 23 is arranged outside the buffer plate 22, wherein the transverse sections of the sealing sleeve 21 and the collision prevention plate 23 are both U-shaped structures, the buffer plate 22 is located between the sealing sleeve 21 and the collision prevention plate 23, the sealing sleeve 21 can be made of PVC, the buffer plate 22 can be made of sponge, and the collision prevention plate 23 can be made of acrylic plate.

[0039] Further, please refer to Figure 1 The plurality of heat-conducting sheets 32 are spaced apart along the extension direction of the heat-conducting adhesive layer 31.

[0040] In the embodiment, the heat-conducting adhesive layer 31 is provided with a plurality of heat-conducting sheets 32 spaced apart along the extension direction of the heat-conducting adhesive layer 31, the plurality of heat-conducting sheets 32 can further dissipate heat, and the heat-conducting adhesive layer 31 is prevented from being in a high-temperature environment all the time, so that heat exchange is accelerated, heat dissipation is facilitated, and the heat-conducting adhesive layer 31 is prevented from being damaged; wherein the heat-conducting sheet 32 is in a ring structure, and considering the insulation factor of the capacitor 1, the heat-conducting sheet 32 is preferably a non-metallic type, such as one of a heat-conducting silica gel sheet or a heat-conducting graphite sheet.

[0041] The working principle and use process of the utility model are as follows: the capacitor 1 is rolled in with an inner film layer 12, the inner side of the inner film layer 12 is pasted with a layer of first electrode 13, wherein the first electrode 13 is the inner anode plate of the capacitor 1, the inner film layer 12 is made of any one of polyethylene, polypropylene, polystyrene and polycarbonate, the capacitor 1 is also rolled in with an outer film layer 15, the inner side of the outer film layer 15 is pasted with a layer of second electrode 16, wherein the second electrode 16 is the inner cathode plate of the capacitor 1, the inner film layer 12 and the outer film layer 15 are arranged in the interval, and the both ends of the inner film layer 12 and the outer film layer 15 are provided with a separation edge 17, wherein the separation edge 17 can be made of silica gel material, the outer wall of the outer film layer 15 is provided with an insulation layer 14, the insulation layer 14 can select plastic film with good sealing property, plays a role of insulating moisture, avoids the capacitor 1 in a high humidity environment, reduces the occurrence of the capacitor 1 leakage current; the head assembly 2 is used for protecting the both ends of the capacitor 1, which comprises a sealing sleeve 21, a buffer plate 22 and an anti-collision plate 23, the sealing sleeve 21 is arranged at the both ends of the capacitor 1, the buffer plate 22 is arranged at the outer side of the sealing sleeve 21, and the anti-collision plate 23 is arranged at the outer side of the buffer plate 22, wherein the transverse section of the sealing sleeve 21 and the anti-collision plate 23 is U-shaped structure, the buffer plate 22 is located between the sealing sleeve 21 and the anti-collision plate 23, the sealing sleeve 21 can be made of PVC material, the buffer plate 22 can select sponge, and the anti-collision plate 23 can select acrylic plate; the heat conduction assembly 3 comprises a heat conduction adhesive layer 31 and a heat conduction sheet 32, wherein the heat conduction adhesive layer 31 is heat conduction adhesive, the heat conduction adhesive layer 31 is coated outside the insulation layer 14, the heat conduction adhesive layer 31 not only can play a role of heat conduction, but also can further increase the role of the insulation layer 14 in insulating high humidity environment, the heat conduction sheet 32 is arranged on the heat conduction adhesive layer 31, the heat conduction sheet 32 can further dissipate heat, and avoids the heat conduction adhesive layer 31 being in high temperature environment all the time, speeds up heat exchange, and is convenient for heat dissipation.

[0042] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model, and any modification, equivalent replacement and improvement etc. within the spirit and principle of the utility model should be contained in the protection scope of the utility model.

Claims

1. A high voltage metallized film capacitor characterized by: Capacitor (1), head assembly (2) and heat conduction assembly (3) are included. A core shaft (11) is arranged at the inner center of the capacitor (1), the two ends of the core shaft (11) extend to the outside of the two ends of the capacitor (1), an inner film layer (12) and an outer film layer (15) are wound in the capacitor (1), the inner film layer (12) and the outer film layer (15) are arranged in an inner and outer interval, and the outer wall of the outer film layer (15) is provided with an insulation layer (14). The head assembly (2) is provided with two, and the two head assemblies (2) are arranged outside the two ends of the capacitor (1). The heat conduction assembly (3) includes a heat conduction glue layer (31) and a heat conduction sheet (32), the heat conduction glue layer (31) is arranged outside the insulation layer (14), and the heat conduction sheet (32) is arranged on the heat conduction glue layer (31).

2. A high voltage metallized film capacitor according to claim 1, characterized in that: The inner side of the inner film layer (12) is provided with a first electrode (13), and the first electrode (13) is an inner anode plate of the capacitor (1).

3. A high voltage metallized film capacitor according to claim 1, characterized in that: The inner side of the outer film layer (15) is provided with a second electrode (16), and the second electrode (16) is an inner cathode plate of the capacitor (1).

4. A high voltage metallized film capacitor according to claim 1, characterized in that: The two ends of the inner film layer (12) and the outer film layer (15) are provided with a separation edge (17).

5. A high voltage metallized film capacitor according to claim 1, characterized in that: The head assembly (2) includes a sealing sleeve (21), a buffer plate (22) and an anti-collision plate (23), the sealing sleeve (21) is arranged at the two ends of the capacitor (1) and penetrates the core shaft (11), the buffer plate (22) is arranged outside the sealing sleeve (21), and the anti-collision plate (23) is arranged outside the buffer plate (22).

6. A high voltage metallized film capacitor according to claim 1, characterized in that: The heat conduction sheet (32) is provided with a plurality of heat conduction sheets (32), and the plurality of heat conduction sheets (32) are distributed in an interval along the extension direction of the heat conduction glue layer (31).

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