CN219418793U

CN219418793U - High-current impact resistant aluminum electrolytic capacitor

Info

Publication number: CN219418793U
Application number: CN202320482946.0U
Authority: CN
Inventors: 肖威; 蔡旭; 李姣娣; 艾亮
Original assignee: Hunan Aihua Group Co Ltd
Current assignee: Hunan Aihua Group Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-07-25
Anticipated expiration: 2033-03-14

Abstract

An aluminum electrolytic capacitor resistant to large current impact comprises a core package, a shell and a cover plate, wherein the core package is hermetically arranged in the shell through the cover plate; the core bag is formed by winding anode foil, electrolytic paper and cathode foil, the anode foil and the cathode foil are respectively electrically connected with an anode foil guide strip and a cathode foil guide strip, and the anode foil guide strip and the cathode foil guide strip are respectively connected with an anode terminal and a cathode terminal on the cover plate; the first packing paper is wound around the connection part of the anode foil guide strip on the anode foil, and extends out of one side of the anode foil guide strip on the core bag. In this application, a partition is formed between the anode foil guide strip and the cathode foil by winding a first backing paper within the core pack, and a second backing paper within the core pack; thus, the high current impact resistance between the anode foil and the cathode foil and between the cathode foil and the anode foil is improved.

Description

High-current impact resistant aluminum electrolytic capacitor

Technical Field

The utility model relates to an aluminum electrolytic capacitor, in particular to an aluminum electrolytic capacitor resistant to large current impact.

Background

The aluminum electrolytic capacitor is widely applied to electronic products, can be widely applied to ox horn aluminum electrolytic capacitors in the industrial field, has the characteristics of large capacity and high voltage resistance, generally needs to bear larger current when in use, and is easy to break down under the action of the large current. According to the analysis of defective products of high-current impact breakdown, short circuit is generally carried out between the position of the anode foil guide strip extending out of the core package and the cathode foil or between the position of the cathode foil guide strip extending out of the core package and the anode foil under the action of high current.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing the aluminum electrolytic capacitor resistant to large current impact.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: an aluminum electrolytic capacitor resistant to large current impact comprises a core package, a shell and a cover plate, wherein the core package is hermetically arranged in the shell through the cover plate; the core bag is formed by winding anode foil, electrolytic paper and cathode foil, the anode foil and the cathode foil are respectively electrically connected with an anode foil guide strip and a cathode foil guide strip, and the anode foil guide strip and the cathode foil guide strip are respectively connected with an anode terminal and a cathode terminal on the cover plate; the first packing paper is wound at the connecting part of the anode foil guiding strip on the anode foil, and extends out of one side of the anode foil guiding strip on the core bag.

In the above aluminum electrolytic capacitor resistant to large current impact, preferably, the first backing paper is wound around the inside of the anode foil.

In the above aluminum electrolytic capacitor resistant to heavy current impact, preferably, a second backing paper is wound around the connection portion of the cathode foil strip on the cathode foil, and the second backing paper extends out from one side of the cathode foil strip on the core package.

In the above aluminum electrolytic capacitor resistant to large current impact, preferably, the second backing paper is wound around the inside of the cathode foil.

In the above aluminum electrolytic capacitor resistant to large current impact, preferably, the lengths of the first and second papers are each between 5 cm and 20 cm.

In the above aluminum electrolytic capacitor resistant to large current impact, preferably, the lengths of the first and second packing papers extending out of the core pack are 3mm-10mm.

Compared with the prior art, the utility model has the advantages that: in the application, a partition is formed between the anode foil guide strip and the cathode foil by winding a first backing paper in the core package, and a partition is formed between the anode foil guide strip and the cathode foil by winding a second backing paper in the core package; thus, the high current impact resistance between the anode foil and the cathode foil and between the cathode foil and the anode foil is improved.

Drawings

Fig. 1 is a schematic structural diagram of an aluminum electrolytic capacitor resistant to large current surge in example 1.

Fig. 2 is a schematic diagram of the structure at a in fig. 1.

Fig. 3 is a schematic winding diagram of the core pack in example 1.

Description of the drawings

1. A core pack; 2. a housing; 21. an anode foil; 22. electrolyzing paper; 23. a cathode foil; 3. a cover plate; 4. a first backing paper; 5. an anode foil guide strip.

Description of the embodiments

The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the utility model, but the scope of the utility model is not limited to the specific embodiments shown.

It will be understood that when an element is referred to as being "fixed, affixed, connected, or in communication with" another element, it can be directly fixed, affixed, connected, or in communication with the other element or intervening elements may be present.

Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present utility model.

Examples

The aluminum electrolytic capacitor resistant to large current impact as shown in fig. 1 and 2 comprises a core package 1, a shell 2 and a cover plate 3, wherein the core package 1 is hermetically arranged in the shell 2 through the cover plate 3; the core package 1 is formed by winding an anode foil 21, electrolytic paper 22 and a cathode foil 23, wherein the anode foil 21 and the cathode foil 23 are respectively and electrically connected with an anode foil guiding strip 5 and a cathode foil guiding strip, and the anode foil guiding strip 5 and the cathode foil guiding strip are respectively connected with an anode terminal and a cathode terminal on the cover plate 3.

In this embodiment, as shown in fig. 3, when the core pack 1 is wound, a first backing paper 4 is wound around the connection portion of the anode foil guide strip 5 on the anode foil 21, the backing paper extends from one side of the anode foil guide strip 5 on the core pack 1, and the length of the first backing paper 4 extending from the core pack 1 is about 5 mm. The first backing paper 4 is wound on the inner side of the anode foil 21; that is, the first paper liner 4 is located at one side of the anode foil 21 close to the winding core of the core pack 1 after winding, and the length of the first paper liner 4 is about 10 cm.

In this embodiment, a second backing paper is wound around the connection portion of the cathode foil guide strip on the cathode foil 23, the second backing paper extends out from one side of the cathode foil guide strip on the core pack 1, and the first backing paper 4 extends out from the core pack 1 by a length of about 5 mm. The second backing paper is wound on the inner side of the cathode foil 23, and the length of the second backing paper is about 10 cm. In the present embodiment, the connection structure of the second packing paper and the core pack 1 is the same as the connection structure of the first packing paper 4 and the core pack 1.

In the present embodiment, the first and second packing papers 4 and 22 are disposed between the anode foil 21 and the electrolyte paper 22 and between the cathode foil 23 and the electrolyte paper 22, so that burrs on the anode and cathode foil guides 5 and 22 can be prevented from easily piercing the electrolyte paper to cause a short circuit. In the conventional aluminum electrolytic capacitor, the anode foil strip 5 and the cathode foil strip are respectively connected to the anode terminal and the cathode terminal, and after the cover plate 3 is assembled on the outer shell, the anode foil strip 5 and the cathode foil strip are extruded to one side of the core package, and at this time, the anode foil strip 5 and the cathode foil strip are easy to be in short circuit with the cathode foil 23 or the anode foil 21; in this embodiment, the first cushion paper 4 and the second cushion paper extend out of the core bag by about 5mm, so that the partition effect can be very good.

In this embodiment, the first and second papers 4 and 4 may be the same in material and size; the material of the first and second sheets 4 and 22 may be the same as or different from that of the electrolytic paper of the present embodiment.

In conventional aluminum electrolytic capacitors, the electrolytic paper 22 typically extends at both ends of the core pack, i.e., the electrolytic paper 22 has a width greater than the widths of the anode foil and the cathode foil, but the electrolytic paper 22 extends a smaller length of the core pack, typically 1-2mm, at which length the separation requirements between the anode foil guide strip and the cathode foil cannot be met.

In the present application, a partition is formed between the anode foil guide strip 5 and the cathode foil 23 by winding a first packing paper 4 inside the core pack 1, and a second packing paper inside the core pack 1 is wound to form a partition between the anode foil guide strip 5 and the cathode foil 23; thus, the high current surge resistance between the anode foil 21 and the cathode foil guide strip and between the cathode foil 23 and the anode foil guide strip 5 is improved.

Claims

1. An aluminum electrolytic capacitor resistant to large current impact comprises a core package, a shell and a cover plate, wherein the core package is hermetically arranged in the shell through the cover plate; the method is characterized in that: the core bag is formed by winding anode foil, electrolytic paper and cathode foil, the anode foil and the cathode foil are respectively electrically connected with an anode foil guide strip and a cathode foil guide strip, and the anode foil guide strip and the cathode foil guide strip are respectively connected with an anode terminal and a cathode terminal on the cover plate; the first packing paper is wound at the connecting part of the anode foil guiding strip on the anode foil, and extends out of one side of the anode foil guiding strip on the core bag.

2. The high-current surge-resistant aluminum electrolytic capacitor according to claim 1, wherein: the first backing paper is wound on the inner side of the anode foil.

3. The high-current surge-resistant aluminum electrolytic capacitor according to claim 1, wherein: the second packing paper is wound at the connecting part of the cathode foil guide strip on the cathode foil, and extends out of one side of the cathode foil guide strip on the core package.

4. The high-current surge-resistant aluminum electrolytic capacitor according to claim 3, wherein: the second backing paper is wound on the inner side of the cathode foil.

5. The high-current surge-resistant aluminum electrolytic capacitor according to claim 3, wherein: the length of the first backing paper and the second backing paper is between 5 cm and 20 cm.

6. The high-current surge-resistant aluminum electrolytic capacitor according to claim 3, wherein: the lengths of the first packing paper and the second packing paper, which extend out of the core bag, are 3mm-10mm.