Aluminum electrolytic capacitor with good stability

Abstract

An aluminum electrolytic capacitor with good stability comprises a shell, a core package and a sealing piece, and the core package is arranged in the shell in a sealed mode through the sealing piece. The core package comprises an anode foil, electrolytic paper and a cathode foil, the electrolytic paper is arranged between the anode foil and the cathode foil, and a protective adhesive tape or isolation paper is arranged between the anode foil and the cathode foil at the winding starting section and the winding tail end of the core package. According to the utility model, the protective adhesive tape or the isolation paper is arranged between the anode foil and the cathode foil at the winding starting section and the winding tail end of the core cladding, so that the electrolytic paper is prevented from being squeezed and damaged by the winding starting section and the winding tail end of the anode foil and the cathode foil when the core cladding is wound, and the short circuit condition is reduced; and the reliability of products with large plot ratio is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of aluminum electrolytic capacitors, especially a kind of aluminum electrolytic capacitor with good stability. BACKGROUND

[0002] Most of the current aluminum electrolytic capacitors are wound aluminum electrolytic capacitors. After winding into a core package, the anode foil and the cathode foil are tightly wound. Since the winding start segment and the winding end segment of the anode foil and the cathode foil are cut, the cut edges of the winding start segment and the winding end segment of the anode foil and the cathode foil after the core package is wound appear like a "knife edge", causing the electrolytic paper between the anode foil and the cathode foil to be injured by the cut edges, resulting in short circuit, which leads to poor stability of the aluminum electrolytic capacitor. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an aluminum electrolytic capacitor with good stability and reduced internal short circuit.

[0004] To solve the above technical problems, the utility model provides a technical scheme: an aluminum electrolytic capacitor with good stability, comprising a housing, a core package, and a sealing element. The core package is sealed in the housing by the sealing element. The core package includes an anode foil, an electrolytic paper, and a cathode foil. The electrolytic paper is arranged between the anode foil and the cathode foil. A protective tape or isolation paper is arranged between the anode foil and the cathode foil at the winding start segment and the winding end segment of the core package.

[0005] Preferably, the length of the protective tape or isolation paper is less than 2 cm, and the width is greater than or equal to the width of the anode foil and the cathode foil.

[0006] Preferably, the core package is wrapped with multiple layers of electrolytic paper, and the wrapped multiple layers of electrolytic paper are fixed with adhesive tape.

[0007] Preferably, the anode foil is riveted with an anode guide needle or an anode guide foil strip, and the anode guide needle or the anode guide foil strip is covered with an isolation paper.

[0008] Preferably, the cathode foil is riveted with a cathode guide needle or a cathode guide foil strip, and the cathode guide needle or the cathode guide foil strip is covered with an isolation paper.

[0009] Preferably, the protective tape includes a plastic tape.

[0010] Preferably, the isolation paper includes electrolytic paper.

[0011] Compared with the prior art, the advantages of the utility model lie in: in the utility model, the protective tape or the isolation paper is arranged between the anode foil and the cathode foil of the winding start section and the winding end section of the core package, so that the winding start section and the winding end section of the anode foil and the cathode foil are prevented from being squeezed to hurt the electrolytic paper during the winding of the core package, so that the short circuit condition is reduced, and the reliability of the product with large volume rate is increased. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural schematic view of the aluminum electrolytic capacitor with good stability in embodiment 1.

[0013] Figure 2 It is the structural schematic view of the core package after being unfolded in embodiment 1.

[0014] LEGEND

[0015] 1, shell;2, rubber plug;3, core package;31, anode foil;32, cathode foil;33, electrolytic paper;34, protective tape or isolation paper;35, anode guide needle;36, cathode guide needle. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the utility model, the following will be combined with the description and the preferred embodiments of the drawings to make more comprehensive and detailed description of the utility model, but the protection scope of the utility model is not limited to the following specific embodiments.

[0017] It should be particularly noted that when a certain element is described as being "fixed to, fixedly connected to, connected to or communicated to" another element, it can be directly fixed, fixedly connected, connected or communicated to another element, or indirectly fixed, fixedly connected, connected or communicated to another element through other intermediate connecting elements.

[0018] Unless otherwise defined, all the professional terms used in the following have the same meaning as that generally understood by the person skilled in the art. The professional terms used in the text are only for the purpose of describing the specific embodiments, and are not intended to limit the protection scope of the utility model. Embodiment 1

[0019] As Figure 1 The aluminum electrolytic capacitor with good stability, comprising a shell 1, a core package 3 and a sealing element, the core package 3 is sealedly arranged in the shell 1 through the sealing element;In the embodiment, the sealing element is a rubber plug 2. Figure 2As shown, the core package 3 is formed by winding an anode foil 31, electrolytic paper 33, and a cathode foil 32. The electrolytic paper 33 is placed between the anode foil 31 and the cathode foil 32. Protective tape or release paper 34 is placed between the anode foil 31 and the cathode foil 32 at the beginning and end of the winding of the core package 3. Two layers of electrolytic paper 33 are provided to ensure the isolation between the anode foil 31 and the cathode foil 32.

[0020] In this embodiment, a protective tape or release paper 34 is provided between the anode foil 31 and the cathode foil 32 at the beginning and end of the winding of the core package 3, so as to ensure that the electrolytic paper 33 will not be squeezed and damaged when the anode foil 31 and the cathode foil 32 are wound in the core package 3, thereby reducing the possibility of short circuits and increasing the reliability of products with large volume ratio.

[0021] In this embodiment, the protective tape can be transparent tape, and the release paper can be electrolytic paper 33. The protective tape or release paper 34 will be less than 2 cm in length and wider than the anode foil 31 and cathode foil 32. In this embodiment, the protective tape or release paper 34 will increase the volume of the core package 3 to some extent, so the length of the protective tape or release paper 34 should be as short as possible. To ensure that the protective tape or release paper 34 isolates the upper and lower sides of the anode foil 31 and cathode foil 32, the width of the protective tape or release paper 34 is greater than the width of the anode foil 31 and cathode foil 32.

[0022] In this embodiment, the core package 3 is wrapped with multiple layers of electrolytic paper 33, and then secured with tape to prevent the core package 3 from coming apart.

[0023] In this embodiment, as Figure 2 As shown, the aluminum electrolytic capacitor is a leaded aluminum electrolytic capacitor. An anode guide pin 35 is riveted to the anode foil 31, and a sheet of insulating paper covers the anode guide pin 35. A cathode guide pin 36 is riveted to the cathode foil 32, and a sheet of insulating paper covers the cathode guide pin 36. In other embodiments, the aluminum electrolytic capacitor can be a bolt-type aluminum electrolytic capacitor or a horn-type aluminum electrolytic capacitor. In the bolt-type or horn-type aluminum electrolytic capacitor, an anode guide foil strip is riveted to the anode foil 31, and a sheet of insulating paper covers the anode guide foil strip. A cathode guide foil strip is riveted to the cathode foil 32, and a sheet of insulating paper covers the cathode guide foil strip.

Claims

1. An aluminum electrolytic capacitor having high stability, characterized by: The application relates to a battery, which comprises a shell, a core package and a sealing member, the core package is sealedly arranged in the shell through the sealing member; the core package comprises an anode foil, electrolytic paper and a cathode foil, the electrolytic paper is arranged between the anode foil and the cathode foil, and a protective tape or isolation paper is arranged between the anode foil and the cathode foil at a winding starting section and a winding ending section of the core package.

2. The aluminum electrolytic capacitor having stability according to claim 1, wherein: The length of the protective tape or isolation paper is less than 2 cm, and the width is greater than or equal to the width of the anode foil and the cathode foil.

3. The aluminum electrolytic capacitor having stability according to claim 1, wherein: The core package is wrapped with multiple layers of electrolytic paper, and the wrapped multiple layers of electrolytic paper are fixed through a tape.

4. The aluminum electrolytic capacitor having stability according to claim 1, wherein: An anode guide needle or an anode guide foil strip is riveted on the anode foil, and the anode guide needle strip or the anode guide foil strip is covered with an isolation paper.

5. The aluminum electrolytic capacitor having stability according to claim 1, wherein: A cathode guide needle or a cathode guide foil strip is riveted on the cathode foil, and the cathode guide needle or the cathode guide foil strip is covered with an isolation paper.

6. The aluminum electrolytic capacitor having stability according to claim 1, wherein: The protective tape comprises a plastic tape.

7. The aluminum electrolytic capacitor having stability according to claim 1, wherein: The isolation paper comprises electrolytic paper.

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