CN218525456U

CN218525456U - Capacitor core electrode leading-out structure

Info

Publication number: CN218525456U
Application number: CN202222196441.6U
Authority: CN
Inventors: 任绍刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2023-02-24
Anticipated expiration: 2032-08-22

Abstract

The utility model relates to a capacitor core electrode leading-out structure, which comprises a capacitor core body, a core rod, a metal spraying layer and a leading-out electrode, wherein the capacitor core body is wound on the core rod, the leading-out electrode is fixed on the core rod and the end surface of the core body, and the end surface of the core body is sprayed with the metal spraying layer for leading-out a capacitor electrode plate; the leading-out electrode is connected with the leading-out electrode plate of the core body through the metal spraying layer. The utility model discloses mainly solve the problem among the prior art, if: 1) The core lead-out wire needs to be welded on the metal spraying layer on the end face of the core in a welding mode, so that the overcurrent capacity of the capacitor core is reduced; 2) The plurality of cores are connected in series, and particularly when the cores are placed up and down, the positions of the cores are not easy to fix, the production and operation are troublesome, and the quality consistency is not easy to guarantee. The utility model discloses simplify the production operation, promoted the ability of overflowing of product, still provided the multicore series scheme.

Description

Capacitor core electrode leading-out structure

Technical Field

The utility model relates to an inside capacitor core structure technical field of condenser, especially a capacitor core electrode's draw-off structure.

Background

The core structure of the existing film capacitor is as follows: the metallized film or the metal foil and the dielectric film are wound on the core rod by the capacitor winding equipment to form the cylindrical capacitor core. Spraying metal materials on two end faces of the capacitor core to lead out two pole plates of the capacitor, then welding lead-out wires on the metal spraying layer to lead out two electrodes of the capacitor, and then loading the capacitor element out of the shell. The technology for producing the capacitor is mature at present and is a general technology for producing the capacitor. However, this technique also has some disadvantages:

1. the core lead-out wire is welded on the metal spraying layer on the end face of the core in a welding mode, and high temperature exists during welding no matter soldering or resistance welding, so that the connecting part of the metal spraying layer below a welding spot and a metalized film or a metal foil of the core is damaged, and finally the overcurrent capacity of the capacitor core is reduced.

2. If a plurality of cores are connected in series, flexible wires are needed to connect the cores so as to adjust the placement positions of the cores. When the core is placed up and down, the position of the core is not easy to fix, a positioning rod is required to be added in the middle of the core rod or the outside of the core rod is wrapped and fixed by an insulating material, the production operation is troublesome, and the quality consistency is not easy to guarantee.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a capacitor core electrode draw forth structure mainly solves the problem that exists among the above-mentioned prior art: 1) The core lead-out wire needs to be welded on the metal spraying layer on the end face of the core in a welding mode, so that the overcurrent capacity of the capacitor core is reduced; 2) The plurality of cores are connected in series, and particularly when the cores are placed up and down, the positions of the cores are not easy to fix, the production and the operation are more troublesome, and the quality consistency is not easy to ensure.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

the utility model provides a capacitor core electrode extraction structure, includes core body, plug, metal spraying coating, the extraction electrode of capacitor, its characterized in that: the capacitor core body is wound on the core rod, the leading-out electrode is fixed on the core rod and the end surface of the core body, and the end surface of the core body is sprayed with a metal spraying layer for leading out a capacitor electrode plate; the leading-out electrode is connected with a leading-out electrode plate of the core body through the metal spraying layer.

The core body of the capacitor is formed by winding a metalized film.

The core body of the capacitor is formed by winding metal foil and a dielectric film.

And screw holes are formed in the central positions of two ends of the core rod.

The extraction electrode is provided with a stud matched with the screw hole on the core rod.

And a metal connecting sheet connected with the metal spraying layer is arranged on the metal electrode body of the extraction electrode.

The two leading-out electrodes of the capacitor have the same structure.

The extraction electrode is provided with an outer end part which is an outer end part with a screw hole or an outer end part with a stud.

The core rod is filled with insulating materials.

In view of the above technical features, the utility model provides a leading-out structure of inside core electrode of condenser, the utility model discloses a product is compared with current product, has following advantage:

1) The leading-out electrode is connected with the leading-out electrode plate of the core body through the metal spraying layer, so that the welding process of the capacitor core leading-out wire in the production process is eliminated, the production operation is simplified, and the overcurrent capacity of the product is improved.

2) A multi-core series connection scheme is provided, and the series connection of the cores can be quickly realized by adopting a simple threaded connection mode.

Drawings

Fig. 1 is a schematic structural view of a capacitor core electrode lead-out structure of the present invention.

Fig. 2 is a schematic structural diagram of an extraction electrode for a capacitor core electrode extraction structure according to the present invention.

Fig. 3 is a top view of fig. 2.

In the figure: 1-a core body; 2-core rod; 3-metal spraying coating; 4-extraction electrode; 4-1-a metal electrode body; 4-1-1-mandrel connection; 4-1-2-outer end (e.g., outer end with screw hole or outer end with stud); 4-2-metal connecting sheet.

Detailed Description

The present invention will be further described with reference to the following detailed description. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Referring to fig. 1:

a capacitor core electrode lead-out structure comprises a capacitor core body 1, a core rod 2, a metal spraying layer 3 and a lead-out electrode 4. The metallized film or the metal foil and the dielectric film are wound on the core rod 2 by the capacitor winding apparatus to form a cylindrical capacitor core body 1. The core rod connecting part 4-1-1 of the extraction electrode 4 is inserted into the end hole of the core rod 2 and fixed in the end hole of the core rod 2 in an interference fit, adhesive bonding and/or threaded connection mode, and the metal connecting sheet 4-2 on the extraction electrode 4 is attached to the end face of the core body 1. The end face of the core body 1 and the upper surface of the metal connecting sheet 4-2 on the leading-out electrode 4 are sprayed with metal materials by a metal spraying process to form a metal spraying layer 3, and the metal connecting sheet 4-2 is buried in the metal spraying layer 3. The electrode plate of the core body 1 is connected on the leading-out electrode 4 through the metal spraying layer 3 and the metal connecting sheet 4-2 to form a capacitor core body, and the capacitor core body can be further arranged on a shell to form a capacitor.

In another production method, firstly, a metal material is sprayed on the end face of the core body 1 to form a bottom metal spraying layer 3, then, the core rod connecting part 4-1-1 of the extraction electrode 4 is inserted into the end hole of the core rod 2 and is fixed in the end hole of the core rod 2 in an interference fit, adhesive bonding and/or threaded connection mode, and the metal connecting sheet 4-2 on the extraction electrode 4 is attached to the top of the bottom metal spraying layer 3. Then spraying metal by a metal spraying process, spraying a metal material on the metal spraying layer 3 at the bottom layer of the core body 1 and the metal connecting sheet 4-2 on the extraction electrode 4 to form a metal spraying layer 3, and burying the metal connecting sheet 4-2 in the metal spraying layer 3. The electrode plate of the core body 1 is connected with the leading-out electrode 4 through the metal spraying layer 3 and the metal connecting sheet 4-2 to form a capacitor core body.

The core body 1 of the capacitor can be formed by winding a belonging film or a metal foil and a dielectric film according to the application and the performance requirements of the capacitor.

If the core rod connecting part 4-1-1 of the extraction electrode 4 is fixed with the core rod 2 by adopting a threaded connection mode, a screw hole can be arranged at the central position of the two ends of the core rod 2 in advance, or the screw hole can be arranged in the production process, and the extraction electrode 4 is provided with a stud matched with the screw hole on the core rod 2.

In order to improve the electrical strength of the capacitor core body, the hole of the core rod 2 can be filled with insulating materials such as insulating silica gel, epoxy resin and the like.

The capacitor is composed of a single core, and the shape and the structure of the two leading-out electrodes 4 of the capacitor can be the same or different. If the direct series assembly of capacitor core or the direct series assembly of capacitor is required, then extraction electrode 4 can be set to the structure of difference, but two extraction electrodes 4 can be the structure of mutual screw thread fixed connection: one extraction electrode 4 is provided as a screw hole and one extraction electrode 4 is provided as a stud. In the production process or the use process, the stud on the lead-out electrode 4 of one capacitor core or one lead-out electrode of one capacitor is directly screwed into the screw hole on the lead-out electrode 4 of another capacitor core or one capacitor.

Referring to fig. 2 and 3:

the leading-out electrode 4 is made of metal material (such as copper) with good conductivity, and the metal electrode body 4-1 and the metal connecting sheet 4-2 can be integrally formed and punched by adopting a die. The metal electrode body 4-1 is provided with a core rod connecting part 4-1-1 for connecting the core rod 2 and a screw hole or a stud (namely, the outer end part 4-1-2) for leading out the capacitor electrode or the core string for use. According to the technical design, the core rod connecting part 4-1-1 can be in interference fit, glued and/or screwed with the end hole of the core rod 2. The number of the metal connecting sheets 4-2 can be set to be different according to the diameter of the end face of the core, and can be one, two or more than two.

The extraction electrode 4 may also be formed by welding, taking into account production cost factors. Firstly, a metal electrode body 4-1 is formed by a mould or a machining mode, and then a copper plate is used for stamping or processing to form a metal connecting sheet 4-2. The metal connecting sheet 4-2 can be integrated or separated. And then the metal connecting sheet 4-2 is welded on the metal electrode body 4-1 by means of soldering, resistance welding, laser welding, ultrasonic welding and the like to form the extraction electrode 4.

The outer end part 4-1-2 on the extraction electrode 4 can be set into different forms according to the requirements of users, such as a screw hole and a screw rod.

Referring to fig. 1-3, a lead-out structure of capacitor core electrode and its manufacturing method are described as an example of a screw connection mode:

firstly, a metal electrode body 4-1 (the material is preferably copper) is formed by a mould or a machining mode, a core rod connecting part 4-1-1 at the lower part of the metal electrode body 4-1 is arranged in a stud shape (such as an M6 stud), and an outer end part 4-1-2 at the upper part is arranged in a screw hole (such as an M4 screw hole). The core rod connecting part 4-1-1 at the lower part of the other metal electrode body 4-1 is arranged into a stud shape (such as an M6 stud), and the outer end part 4-1-2 at the upper part is arranged into a stud (such as an M4 stud).

The copper plate is punched or processed to form the metal connecting sheet 4-2. The metal connecting sheet 4-2 is integrated, the center of the metal connecting sheet is a circular hole with the diameter of 6mm (matched with an M6 stud of a mandrel connecting part 4-1-1 at the lower part of the electrode body 4-1), and four (or other numbers of) strip-shaped metal sheets extend outwards.

And welding the metal connecting sheet 4-2 on the metal electrode body 4-1 by means of brazing, resistance welding, laser welding, ultrasonic welding and the like to form the extraction electrode 4.

The metallized film or the metal foil and the dielectric film are wound on the core rod 2 by the capacitor winding apparatus to form a cylindrical capacitor core body 1. Spraying a metal material on the end face of the core body 1 to form a bottom metal spraying layer 3, then processing two ends of the core rod 2 to form a threaded hole M6, screwing the core rod connecting part 4-1-1 of one leading-out electrode 4 (the upper part is a threaded hole) into the threaded hole of the core rod 2, and screwing the core rod connecting part 4-1-1 of the other leading-out electrode 4 (the upper part is a stud) into the other threaded hole of the core rod 2. The metal connecting sheet 4-2 on the extraction electrode 4 is attached on the bottom metal spraying layer 3. Then spraying metal by a metal spraying process, spraying a metal material on the metal spraying layer 3 at the bottom layer of the core body 1 and the metal connecting sheet 4-2 on the extraction electrode 4 to form a metal spraying layer 3, and burying the metal connecting sheet 4-2 in the metal spraying layer 3. The electrode plate of the core body 1 is connected with the leading-out electrode 4 through the metal spraying layer 3 and the metal connecting sheet 4-2 to form a capacitor core body.

When the capacitor cores are required to be directly assembled in series, the stud on one leading-out electrode 4 of one capacitor core is directly screwed into the screw hole on the leading-out electrode 4 of the other capacitor core, so that the series connection of the capacitor cores can be realized, and other welding operations are not required.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. The utility model provides a structure is drawn forth to condenser core electrode, includes core body (1), plug (2), metal spraying layer (3), extraction electrode (4) of condenser, its characterized in that: the capacitor core body (1) is wound on the core rod (2), the lead-out electrode (4) is fixed on the core rod (2) and the end surface of the core body (1), and the end surface of the core body (1) is sprayed with a metal spraying layer (3) for leading out a capacitor electrode plate; the extraction electrode (4) is connected with an extraction electrode plate of the core body (1) through a metal spraying layer (3).

2. The capacitor core electrode lead-out structure according to claim 1, wherein: the core body (1) of the capacitor is formed by winding a metalized film.

3. The capacitor core electrode lead-out structure according to claim 1, characterized in that: the core body (1) of the capacitor is formed by winding metal foil and a dielectric film.

4. The capacitor core electrode lead-out structure according to claim 1, characterized in that: screw holes are arranged at the central positions of the two ends of the core rod (2).

5. The capacitor core electrode lead-out structure according to claim 4, wherein: the extraction electrode (4) is provided with a stud matched with the screw hole on the core rod (2).

6. The capacitor core electrode lead-out structure according to claim 1, wherein: the metal electrode body (4-1) of the leading-out electrode (4) is provided with a metal connecting sheet (4-2) connected with the metal spraying layer (3).

7. The capacitor core electrode lead-out structure according to claim 1, characterized in that: the two leading-out electrodes (4) of the capacitor have the same structure.

8. The capacitor core electrode lead-out structure according to claim 1, wherein: the extraction electrode (4) has an outer end (4-1-2) which is an outer end with a screw hole or an outer end with a stud.

9. The capacitor core electrode lead-out structure according to claim 1, wherein: the core rod (2) is filled with insulating materials.