CN213845048U

CN213845048U - High-voltage-resistant film capacitor

Info

Publication number: CN213845048U
Application number: CN202023092959.2U
Authority: CN
Inventors: 曹向阳; 唐信元
Original assignee: Chengdu Duoji Electronics Co ltd
Current assignee: Chengdu Duoji Electronics Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-07-30
Anticipated expiration: 2030-12-21

Abstract

The utility model relates to a high pressure resistant film capacitor, including shell and electric capacity main part, the electric capacity main part sets up in the shell, electric capacity main part both ends all are provided with electrode terminal, every be provided with L type pin on the electrode terminal, the electric capacity main part is formed through the rolling system of noninductive winder after first conductive film, first insulating film, second conductive film and the insulating membrane lamination of second, two electrode terminal respectively with first conductive film and second conductive film are connected, electrode terminal with the junction of first conductive film and second conductive film is provided with the liner membrane, the electric capacity main part with it has epoxy encapsulating layer still to fill between the shell. The utility model discloses an electric capacity main part is that the layering is convoluteed and is formed, and the laminating is inseparabler between film and the film, and remaining air still less, resistance is littleer, and is high pressure resistant to utilize epoxy embedment layer protection conducting film, make the difficult oxidation of conducting film, life is longer.

Description

High-voltage-resistant film capacitor

Technical Field

The utility model relates to a condenser technical field especially relates to a.

Background

The capacitor, as the name implies, is an "electric container", which is a device for containing electric charges, is widely used in electronic equipment, plays a role in isolating direct current and alternating current, coupling bypass, filtering tuning and the like, and can be divided into an electrolyte capacitor, a paper capacitor, a mica capacitor, a thin film capacitor and the like according to different media. Among them, the film capacitor is widely used in places such as power noise bypass due to its non-polarity, high insulation resistance and small dielectric loss. However, the thin film capacitor has a weak voltage-withstanding capability, and particularly needs to be noticed, the thin film capacitor has a poor heat dissipation effect, and the capacitor core of the thin film capacitor is accumulated with heat and heated after long-time operation, so that the voltage-withstanding capability of the thin film capacitor is further limited, and the capacitor can be broken down, thereby causing permanent damage, serious damage, and even explosion and ignition of the shell.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a high voltage-resistant film capacitor in response to the weak voltage-resistant capability of the film capacitor.

A high-voltage-resistant film capacitor comprises a shell and a capacitor main body, wherein the capacitor main body is arranged in the shell, electrode terminals are arranged at two ends of the capacitor main body, an L-shaped pin is arranged on each electrode terminal, the capacitor main body is formed by laminating a first conductive film, a first insulating film, a second conductive film and a second insulating film and then rolling the laminated films through a non-inductive winding machine, the two electrode terminals are respectively connected with the first conductive film and the second conductive film, a liner film is arranged at the joint of each electrode terminal and the first conductive film and the second conductive film, and an epoxy resin encapsulation layer is filled between the capacitor main body and the shell.

Preferably, the outer shell comprises an outer wall, a buffer layer and an inner wall, and the buffer layer is filled between the outer wall and the inner wall in a honeycomb shape.

Preferably, the first conductive film and the second conductive film are connected by conductive metal wires to form a rhombic grid shape.

Preferably, the outer edge portions of the first insulating film and the second insulating film are further provided with a reserved edge, and glue is applied to the reserved edge.

Preferably, the first insulating film and the second insulating film are PP films.

The utility model discloses an useful part lies in: 1. the capacitor main body is formed by winding in layers, the films are tightly attached, the residual air is less, the resistance is smaller, high pressure resistance is realized, and the epoxy resin encapsulating layer is utilized to protect the conductive film, so that the conductive film is not easy to oxidize, and the service life is longer; 2. the shell embeds there is the honeycomb buffer layer, utilizes the deformation volume of buffer layer absorption electric capacity main part for the great deformation can not take place for the condenser outward appearance, avoids the condenser to extrude other electronic components.

Drawings

FIG. 1 is a schematic perspective view of a high voltage resistant thin film capacitor according to an embodiment;

FIG. 2 is a schematic diagram of a capacitor main body structure;

FIG. 3 is a schematic view of a structure of an electrode terminal and a first conductive film;

fig. 4 is a schematic cross-sectional view of a high voltage resistant film capacitor.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 4, a high voltage resistant film capacitor includes a housing 1 and a capacitor body 2, the capacitor body 2 is disposed in the housing 1, electrode terminals 3 are disposed at two ends of the capacitor body 2, each electrode terminal 3 is provided with an L-shaped pin 31, the capacitor body 2 is formed by laminating a first conductive film 21, a first insulating film 22, a second conductive film 23 and a second insulating film 24 and rolling the laminated films by a non-inductive winding machine, the two electrode terminals 3 are respectively connected with the first conductive film 21 and the second conductive film 23, a pad film 32 is disposed at a connection part of the electrode terminal 3 and the first conductive film 21 and the second conductive film 23, and an epoxy resin potting layer 4 is filled between the capacitor body 2 and the housing 1. Specifically, in the present embodiment, during assembly, the first conductive film 21, the first insulating film 22, the second conductive film 23 and the second insulating film 24 are stacked and then rolled into the cylindrical capacitor body 2 by the non-inductive winding machine, which has the advantages of strong voltage endurance, low high frequency loss, good arc striking effect, long service life, etc. The first insulating film 22 and the second insulating film 24 are PP films. The capacitor body 2 is mounted in the housing 1, and the capacitor body 2 is protected by the housing 1. it should be noted that, in order to prevent the second insulating film 24 at the outermost layer from being damaged, the epoxy resin potting layer 4 is used for encapsulation, and the production cost is low, so that the capacitor body is suitable for mass production. Furthermore, the electrode terminal 3 is used for leading out electric charges, an L-shaped pin 31 is arranged at one end of the electrode terminal 3 far away from the capacitor body 2, and the capacitor is soldered on a circuit board through the L-shaped pin 31, so that the capacitor is very convenient to mount. Further, the end of the electrode terminal 3 is connected and fixed to the conductive film by the spacer film 32, so that the connection strength between the electrode terminal 3 and the conductive film is improved and the electrode terminal 3 is prevented from being mounted in a misaligned state.

As shown in fig. 4, the outer shell 1 includes an outer wall 11, a buffer layer 12 and an inner wall 13, wherein the buffer layer 12 is filled between the outer wall 11 and the inner wall 13 in a honeycomb shape. Specifically, a honeycomb-shaped buffer layer 12 is filled between the outer wall 11 and the inner wall 13, and the buffer layer 12 is used for absorbing the deformation of the capacitor main body 2, so that the phenomenon that the capacitor main body 2 directly extrudes the shell 1 when deformed to cause the bulge of the shell 1 is avoided.

Specifically, in the present embodiment, the first conductive film 21 and the second conductive film 23 are connected by conductive wires to form a rhombic grid. Utilize the electrically conductive wire to constitute latticedly, when the electric current on the electrode terminal 3 at electric capacity main part 2 both ends sharply increases, lead to electric capacity main part 2 inside temperature to rise to blow electrically conductive wire, cut off the electric current, can effectively prevent that the condenser from puncturing and leading to the short circuit of circuit.

As shown in fig. 2, the outer edges of the first insulating film 22 and the second insulating film 24 are further provided with a margin 221, and the margin 221 is coated with glue. Specifically, the glue is applied to the remaining edges 221 formed at the outer edges of the first insulating film 22 and the second insulating film 24, so that the edges of the first insulating film 22 and the second insulating film 24 can be wound and adhered without being unwound.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A high voltage resistant film capacitor is characterized in that: the capacitor comprises a shell and a capacitor body, wherein the capacitor body is arranged in the shell, electrode terminals are arranged at two ends of the capacitor body, each electrode terminal is provided with an L-shaped pin, the capacitor body is formed by laminating a first conductive film, a first insulating film, a second conductive film and a second insulating film and then rolling the laminated films through a non-inductive winding machine, the two electrode terminals are respectively connected with the first conductive film and the second conductive film, a liner film is arranged at the joint of the electrode terminals and the first conductive film and the second conductive film, and an epoxy resin encapsulation layer is filled between the capacitor body and the shell.

2. A high voltage tolerant film capacitor as claimed in claim 1, wherein: the shell comprises an outer wall, a buffer layer and an inner wall, wherein the buffer layer is filled between the outer wall and the inner wall in a honeycomb shape.

3. A high voltage tolerant film capacitor as claimed in claim 2, wherein: the first conductive film and the second conductive film are connected by conductive metal wires to form a rhombic grid shape.

4. A high voltage tolerant film capacitor as claimed in claim 3, wherein: the outer edge parts of the first insulating film and the second insulating film are further provided with reserved edges, and glue is coated on the reserved edges.

5. A high voltage tolerant film capacitor as claimed in claim 4, wherein: the first insulating film and the second insulating film are PP films.