CN212084853U

CN212084853U - Aluminum electrolytic capacitor with small leakage current

Info

Publication number: CN212084853U
Application number: CN202021003365.7U
Authority: CN
Inventors: 张平; 张少华; 卜代青
Original assignee: Yiyang Sunshine Electronic Technology Co ltd
Current assignee: Yiyang Sunshine Electronic Technology Co ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2020-12-04
Anticipated expiration: 2030-06-04

Abstract

The utility model provides an aluminum electrolytic capacitor that leakage current is little, which comprises a cover plate, core package and shell, the core package passes through the sealed setting of apron in the shell, the core package includes anode foil, electrolytic paper and cathode foil, be provided with an anode foil strip on the anode foil at least, anode foil strip and anode foil integrated into one piece, be provided with cathode foil strip on the cathode foil, anode foil strip and cathode foil strip are led fixed connection respectively on anode connecting post and cathode connecting post, all sealed fixed connection between anode connecting post and cathode connecting post and the apron. The utility model discloses in, positive pole foil strip and positive pole paper tinsel are integrated into one piece, need not rivet, and this just also compares with traditional aluminum electrolytic capacitor and does not destroy the surface of positive pole paper tinsel, more does not have because the burr that the riveting produced, and this can reduce aluminum electrolytic capacitor's leakage current, also can improve aluminum electrolytic capacitor's yield when ageing simultaneously.

Description

Aluminum electrolytic capacitor with small leakage current

Technical Field

The utility model relates to an aluminum electrolytic capacitor, in particular to an aluminum electrolytic capacitor with small leakage current.

Background

Lead type aluminum electrolytic capacitors, bolt type aluminum electrolytic capacitors, horn type aluminum electrolytic capacitors and the like are arranged in the aluminum electrolytic capacitors, and the bolt type aluminum electrolytic capacitors and the horn type aluminum electrolytic capacitors are all riveted with anode foils or cathode foils by adopting foil guide strips to lead out capacitors. However, after the conductive foil strip is riveted with the anode foil, the conductive foil strip needs to be aged to repair an oxide film on the surface of the anode foil and an oxide film damaged by the riveting point, but the repair effect of the oxide film of the riveting point is poor, so that the anode foil is easy to leak electricity at the riveting point, and the leakage current of the aluminum electrolytic capacitor is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of overcoming the defects of the prior art and provide an aluminum electrolytic capacitor with small leakage current.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides an aluminum electrolytic capacitor that leakage current is little, includes apron, core package and shell, the core package passes through the sealed setting of apron in the shell, the core package includes positive pole paper tinsel, electrolytic paper and negative pole paper tinsel, be provided with an anode foil strip on the positive pole paper tinsel at least, anode foil strip and positive pole paper tinsel integrated into one piece are led to the positive pole, be provided with the cathode foil strip on the negative pole paper tinsel, anode foil strip and cathode foil strip are led to the positive pole fixed connection respectively on positive pole spliced pole and negative pole spliced pole, all sealed fixed connection between positive pole spliced pole and cathode spliced pole and the apron.

In the aluminum electrolytic capacitor with small leakage current, preferably, the cathode foil guide strip and the cathode foil are integrally formed.

In the above aluminum electrolytic capacitor with small leakage current, preferably, the cover plate includes a resin plate and a rubber layer; the rubber layer is bonded on a resin plate, and the resin plate is pressed against the beam waist of the shell.

In the aluminum electrolytic capacitor with small leakage current, preferably, the upper parts of the anode connecting column and the cathode connecting column are connected with lead terminals.

In the aluminum electrolytic capacitor with small leakage current, preferably, the anode foil guide strip and the cathode foil guide strip on the core package are arranged in a staggered manner.

In the aluminum electrolytic capacitor with small leakage current, preferably, the bottom of the electrolytic paper on the core pack extends out of the bottom of the anode foil.

In the above aluminum electrolytic capacitor with a small leakage current, preferably, the upper part of the electrolytic paper extends above the anode foil and the cathode foil.

Compared with the prior art, the utility model has the advantages of: the utility model discloses in, positive pole foil strip and positive pole paper tinsel are integrated into one piece, need not rivet, and this just also compares with traditional aluminum electrolytic capacitor and does not destroy the surface of positive pole paper tinsel, more does not have because the burr that the riveting produced, and this can reduce aluminum electrolytic capacitor's leakage current, also can improve aluminum electrolytic capacitor's yield when ageing simultaneously.

Drawings

Fig. 1 is a schematic structural view of an aluminum electrolytic capacitor with a small leakage current in example 1.

Fig. 2 is a schematic sectional view of an aluminum electrolytic capacitor with a small leakage current in example 1.

Fig. 3 is a schematic structural view of the cover plate in embodiment 1.

Fig. 4 is a schematic view of the core pack of example 1 after being unfolded.

Description of the figures

1. A cover plate; 11. a resin plate; 12. a rubber layer; 13. a lead terminal; 2. a core package; 21. an anode foil; 22. electrolyzing paper; 23. a cathode foil; 3. a housing; 4. an anode foil guide strip; 5. a cathode foil guide strip; 6. an anode connection post; 7. a cathode connection post; 8. an explosion-proof valve; 9. and connecting the holes.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.

Unless otherwise defined, all terms of art 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 limit the scope of the present invention.

Example 1

The aluminum electrolytic capacitor with small leakage current shown in fig. 1 and fig. 2 comprises a cover plate 1, a core package 2 and a shell 3, wherein the core package 2 is hermetically arranged in the shell 3 through the cover plate 1. As shown in fig. 4, the core package 2 includes an anode foil 21, an electrolytic paper 22 and a cathode foil 23, at least one anode foil strip 4 is disposed on the anode foil 21, the anode foil strip 4 and the anode foil 21 are integrally formed, the cathode foil strip 5 and the cathode foil 23 are also integrally formed, and the anode foil strip 4 and the cathode foil strip 5 are respectively provided with a connecting hole 9 connected to an anode connecting post 6 and a cathode connecting post 7. The anode foil guiding strip 4 and the cathode foil guiding strip 5 are respectively and fixedly connected to an anode connecting post 6 and a cathode connecting post 7, and the anode connecting post 6, the cathode connecting post 7 and the cover plate 1 are both fixedly connected in a sealing manner.

In the present embodiment, since anode foil guide strip 4 and cathode foil guide strip 5 are formed integrally with anode foil 21 and cathode foil 23, respectively, the process of caulking is not required, and the oxide film on the surface of anode foil 21 is not damaged by caulking, and there is no repair of the oxide film at the caulking point in the case of aging. The repair of the oxide film on the surface of the anode foil 21 is also relatively simple during aging. Meanwhile, because burrs caused by riveting the anode foil guiding strip 4 and the cathode foil guiding strip 5 are avoided, the short circuit of the aluminum electrolytic capacitor is reduced during aging, and the yield of products is improved.

As shown in fig. 3, in the present embodiment, the cap plate 1 includes a resin plate 11 and a rubber layer 12; the rubber layer 12 is bonded to the resin plate 11, and the resin plate 11 is pressed against the corset of the housing 3. Lead terminals 13 are connected to the upper portions of the anode connection post 6 and the cathode connection post 7. In this embodiment, the lead terminal 13 may be a bolt or a horn connection terminal.

In this embodiment, after the core package 2 is wound, the anode foil strips 4 and the cathode foil strips 5 on the core package 2 are staggered, and at least one layer of transparent adhesive tape is wound on the core package 2. The bottom of the electrolytic paper 22 on the core pack 2 protrudes out of the bottom of the anode foil 21. The upper part of the electrolytic paper 22 is protruded above the anode foil 21 and the cathode foil 23. In this embodiment, because the upper portion of electrolytic paper 22 extends above the upper portions of anode foil 21 and cathode foil 23, anode foil strip 4 does not touch cathode foil 23, and cathode foil strip 5 does not touch anode foil 21. Meanwhile, in the embodiment, the bottom of the electrolytic paper 22 on the core package 2 extends out of the bottom of the anode foil 21, so that the bottom of the anode foil 21 is not easily subjected to current breakdown with the bottom of the outer shell 3 to cause a short circuit.

In the present embodiment, the explosion-proof valve 8 may be disposed on the cover plate 1, or may be disposed on the bottom of the housing 3.

In this embodiment, the anode foil guiding strip 4 and the anode foil 21 are integrally formed without riveting, which does not damage the surface of the anode foil 21 compared with the conventional aluminum electrolytic capacitor, and further does not generate burrs due to riveting, which can reduce the leakage current of the aluminum electrolytic capacitor and improve the yield of the aluminum electrolytic capacitor during aging.

Claims

1. An aluminum electrolytic capacitor with small leakage current, characterized in that: including apron, core package and shell, the core package passes through the sealed setting of apron in the shell, the core package includes positive pole paper tinsel, electrolytic paper and negative pole paper tinsel, be provided with an anode foil strip on the positive pole paper tinsel at least, anode foil strip and positive pole paper tinsel integrated into one piece, be provided with the cathode foil strip on the negative pole paper tinsel, anode foil strip and cathode foil strip are fixed connection respectively on positive pole spliced pole and negative pole spliced pole, all sealed fixed connection between positive pole spliced pole and cathode spliced pole and the apron.

2. The aluminum electrolytic capacitor with small leakage current according to claim 1, characterized in that: the cathode foil guiding strip and the cathode foil are integrally formed.

3. The aluminum electrolytic capacitor with small leakage current according to claim 1, characterized in that: the cover plate comprises a resin plate and a rubber layer; the rubber layer is bonded on a resin plate, and the resin plate is pressed against the beam waist of the shell.

4. The aluminum electrolytic capacitor with small leakage current according to claim 3, characterized in that: and the upper parts of the anode connecting column and the cathode connecting column are connected with lead terminals.

5. The aluminum electrolytic capacitor with small leakage current according to claim 1, characterized in that: the anode foil guide strips and the cathode foil guide strips on the core bag are arranged in a staggered mode.

6. The aluminum electrolytic capacitor with small leakage current according to claim 1, characterized in that: the bottom of the electrolytic paper on the core pack extends out of the bottom of the anode foil.

7. The aluminum electrolytic capacitor with small leakage current according to claim 6, characterized in that: the upper part of the electrolytic paper extends out of the upper parts of the anode foil and the cathode foil.