Metallized film for capacitor

Abstract

According to the metalized film for the capacitor provided by the utility model, the wave bulges are arranged on the upper side and the lower side of the base film, and the wave bulges not only can increase the adhesion strength of the metalized film, but also can increase the evaporation thickness of the metalized film, so that the metalized film can be better attached to the surface of the base film; the metalized films are evaporated on the upper side and the lower side of the base film, so that the thickness of the metalized films can be further increased; through the above arrangement, the thickness of the metallized film can be greatly increased, and the capacitor can bear a larger current.

Description

TECHNICAL FIELD

[0001] The utility model belongs to capacitor metallized film technical field especially relates to a kind of for capacitor's metallized film. BACKGROUND

[0002] Thin film capacitor is widely applied due to its good voltage resistance and self-healing, and the metallized film is an important material for the production of thin film capacitor. The thin film is formed by melting, evaporating and depositing high-purity metal on the dielectric base film in high vacuum state, and the thin film with a layer of extremely thin metal plating on the surface of the dielectric base film is the metallized film. The resistance value of the metal plating on the metallized film per square area is called square resistance, i.e. sheet resistance.

[0003] The existing capacitor's metallized film is generally evaporated and plated on one side surface of the base layer. Since the thickness of the metallized film is thin, the capacitor with the metallized film cannot withstand large current, and the capacitor is easily broken down when the current is too large. Therefore, the utility model provides a kind of metallized film for capacitor to solve the above problems. INVENTION CONTENTS

[0004] The utility model provides a kind of metallized film for capacitor, to solve the problem proposed in the background art.

[0005] The utility model is realized as follows: a kind of metallized film for capacitor, including film assembly;

[0006] The film assembly includes a base film, and the upper and lower sides of the base film are provided with wave protrusions, and the outer side of the wave protrusion is provided with a metallized film;

[0007] The metallized film is provided with a flash on one side of the longitudinal edge, which exposes the surface of the base film.

[0008] Preferably, the base film is an insulating film, and any one of polypropylene film, polystyrene film, polyphenylene sulfide film, polyester film and polycarbonate film can be used.

[0009] Preferably, the upper and lower sides of the base film are also provided with heat-conducting sheets.

[0010] Preferably, the heat-conducting sheet is connected to the metallized film.

[0011] Preferably, the heat-conducting sheet is made of any one of heat-conducting silica gel sheet or heat-conducting graphite sheet.

[0012] Preferably, the metallized film is made of zinc-aluminum composite material.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The wave protrusions are arranged on the upper and lower sides of the base film, which can not only increase the adhesion strength of the metallized film, but also increase the evaporation thickness of the metallized film, so that the metallized film can be better attached to the surface of the base film; the metallized film is evaporated on the upper and lower sides of the base film, which can further increase the thickness of the metallized film; through the above arrangement, the thickness of the metallized film can be greatly increased, so that the capacitor can withstand greater current use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a whole structure schematic view of the utility model;

[0016] Fig. 2 It is a whole structure sectional view of the utility model;

[0017] Fig. 3 It is a structure schematic view of the base film, wave protrusion and heat conduction sheet in the utility model.

[0018] In the drawings:

[0019] 1, film assembly; 11, base film; 12, wave protrusion; 13, metallized film;

[0020] 2, heat conduction sheet; 3, edge. DETAILED DESCRIPTION

[0021] The technical solutions of the utility model will be clearly and completely described below in combination with the drawings, obviously, the described embodiments are a part of the embodiments of the utility model, rather than all the embodiments.

[0022] The components of the utility model embodiments usually described and displayed in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments 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.

[0023] Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled person in the art without creative labor belong to the scope of protection of the utility model.

[0024] In the description of the utility model, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of 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.

[0025] In the description of the utility model, it is to explain, unless there is definite and limited, the term "installation", "link", "connection" should be 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 direct connection, also can through the intermediate medium indirectly connect, can be two element inside the intercommunication. For ordinary skilled in the art, the above-mentioned term can be understood in the utility model with the specific meaning of the specific situation.

[0026] Please refer to Figs. 1 to 3 The utility model provides a kind of technical scheme: a metallized film for capacitor, including film assembly 1;Film assembly 1 includes base film 11, the upper and lower sides of base film 11 are equipped with wave protrusion 12, the outside of wave protrusion 12 is equipped with metallized film 13;Metallized film 13 one side longitudinal edge is equipped with the margin 3 that exposes the surface of base film 11.

[0027] In the embodiment, wave protrusion 12 is equipped on the upper and lower sides of base film 11, wave protrusion 12 not only can increase the adhesion strength of metallized film 13, also can increase the evaporation thickness of metallized film 13, so that it can be better attached to the surface of base film 11;Metallized film 13 is evaporated on the upper and lower sides of base film 11, which can further increase the thickness of metallized film 13;By the above setting, the thickness of metallized film 13 can be greatly increased, so that capacitor can withstand greater current use demand;Metallized film 13 one side longitudinal edge is equipped with the margin 3 that exposes the surface of base film 11, and the side of the upper and lower sides of metallized film 13 is equipped with margin 3.

[0028] Further, base film 11 is an insulating film, which is made of any one of polypropylene film, polystyrene film, polyphenylene sulfide film, polyester film and polycarbonate film.

[0029] In the embodiment, base film 11 is made of any one of polypropylene film, polystyrene film, polyphenylene sulfide film, polyester film and polycarbonate film, which is made of insulating material to avoid the mutual influence of two metallized films 13.

[0030] Further, the upper and lower sides of base film 11 are also provided with heat-conducting sheets 2.

[0031] Further, the heat-conducting sheets 2 are connected to the metallized film 13.

[0032] Further, the heat-conducting sheets 2 are made of any one of heat-conducting silica gel sheets or heat-conducting graphite sheets.

[0033] In the embodiment, the heat-conducting sheet 2 is made of any one of heat-conducting silica gel sheet or heat-conducting graphite sheet, and the heat-conducting sheet 2 can dissipate the heat of the metallized film 13, so as to avoid the metallized film 13 being in high temperature environment all the time and avoid the capacitor working in high temperature environment.

[0034] Further, the metallized film 13 is made of zinc-aluminum composite material.

[0035] In the embodiment, the metallized film 13 is made of zinc-aluminum composite material, and in another embodiment, the metallized film 13 can also be made of aluminum material.

[0036] The working principle and use process of the utility model are as follows: the upper and lower sides of the base film 11 are both provided with wave protrusions 12, the wave protrusions 12 can not only increase the adhesion strength of the metallized film 13, but also increase the evaporation thickness of the metallized film 13, so that the metallized film 13 can be better attached to the surface of the base film 11; the upper and lower sides of the base film 11 are both evaporated with the metallized film 13, which can further increase the thickness of the metallized film 13; through the above setting, the thickness of the metallized film 13 can be greatly increased, so that the capacitor can withstand the use requirement of larger current.

[0037] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A metalized film for a capacitor, characterized by: The film assembly (1) comprises a base film (11), and the upper and lower sides of the base film (11) are provided with wave-shaped protrusions (12), and the outer sides of the wave-shaped protrusions (12) are provided with a metallized film (13). The longitudinal edge of one side of the metallized film (13) is provided with a flash (3) exposing the surface of the base film (11). The base film (11) is an insulating film, and any one of polypropylene film, polystyrene film, polyphenylene sulfide film, polyester film and polycarbonate film can be adopted.

2. The metalized film for a capacitor according to claim 1, wherein: The upper and lower sides of the base film (11) are further provided with heat-conducting sheets (2).

3. The metalized film for a capacitor according to claim 1, wherein: The heat-conducting sheets (2) are connected to the metallized film (13).

4. The metalized film for a capacitor according to claim 3, wherein: The heat-conducting sheets (2) adopt any one of heat-conducting silica gel sheets or heat-conducting graphite sheets.

5. The metalized film for a capacitor according to claim 4, wherein: The metallized film (13) is made of zinc-aluminum composite material.

6. The metalized film for a capacitor according to claim 1, wherein: ​

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