Anti-vibration aluminum electrolytic capacitor with long service life

Abstract

The utility model relates to a long-life anti-vibration aluminum electrolytic capacitor, which comprises an aluminum shell, a sealing element and a core bag, the core bag is arranged in the aluminum shell in a sealed mode through a sealing piece. The sealing element comprises a rubber layer and a hard plate layer, the rubber layer is in close contact with the hard plate layer, and the hard plate layer is arranged on one side far away from the core package; and the rubber layer is connected with the anode guide pin and the cathode guide pin on the core cladding through girdling extrusion. The hard board layer can improve the deformation resistance and the aging resistance of the rubber plug layer, and can effectively prevent external harmful elements from invading the rubber plug; and electrolyte on the core package can be prevented from volatilizing through the rubber layer, so that the service life of the aluminum electrolytic capacitor is ensured. And meanwhile, the diameter of the through hole through which the lead passes on the hard board layer is very small, so that the shaking of the lead of the anode guide pin and the cathode guide pin can be limited to a certain extent, and the anti-vibration performance of the aluminum electrolytic capacitor is improved.

Description

Technical Field

[0001] The utility model relates to an aluminum electrolytic capacitor, in particular to a long-life vibration-resistant aluminum electrolytic capacitor. Background Art

[0002] With the rapid development of technologies such as the Internet of Things, 5G communications, and artificial intelligence, demand for long-life liquid aluminum electrolytic capacitors will continue to grow. Their application prospects are particularly broad in data centers and communications equipment. Furthermore, with the global economic recovery and the advancement of infrastructure construction, demand for long-life capacitors in the industrial automation sector will continue to increase.

[0003] Long-life, vibration-resistant liquid aluminum electrolytic capacitors, due to their excellent stability and durability, are widely used in fields requiring long-term stable operation, such as data centers, communications equipment, and industrial automation. These fields place extremely high demands on the lifespan and reliability of capacitors. Once a product fails, repair costs are very high, so long-life, vibration-resistant products have significant advantages.

[0004] However, current liquid aluminum electrolytic capacitors are all sealed with rubber plugs. The solvent permeability of the rubber plugs themselves will cause the electrolyte to become less and less, thereby affecting the life of the liquid aluminum electrolytic capacitors. At the same time, due to the elasticity of the rubber plugs themselves, the lead parts of the anode and cathode guide pins and the aluminum stem are prone to breakage due to vibration. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a long-life vibration-resistant aluminum electrolytic capacitor.

[0006] In order to solve the above technical problems, the technical solution proposed by the utility model is: a long-life vibration-resistant aluminum electrolytic capacitor, comprising an aluminum shell, a seal and a core package; the core package is sealed in the aluminum shell by the seal; it is characterized in that: the seal comprises a rubber layer and a hard plate layer, the rubber layer and the hard plate layer are in close contact with each other, and the hard plate layer is arranged on the side away from the core package; the rubber layer is connected to the anode guide pin and the cathode guide pin on the core package by waist extrusion.

[0007] In the above-mentioned long-life vibration-resistant aluminum electrolytic capacitor, preferably, the rubber layer and the aluminum shell are connected by a waist seal.

[0008] In the above-mentioned long-life vibration-resistant aluminum electrolytic capacitor, preferably, the hard plate layer is provided with through holes through which the anode guide pin and the cathode guide pin pass, and the diameter of the through holes is 0-0.5 mm larger than the lead diameter of the anode guide pin and the cathode guide pin.

[0009] In the above-mentioned long-life vibration-resistant aluminum electrolytic capacitor, preferably, the diameter of the hard plate layer is equal to the diameter of the rubber layer, and the curling portion of the aluminum shell is located on the hard plate layer.

[0010] In the above-mentioned long-life vibration-resistant aluminum electrolytic capacitor, preferably, the diameter of the hard plate layer is smaller than the diameter of the rubber plug, and the curling portion of the aluminum shell is located on the rubber plug layer.

[0011] Compared with the prior art, the advantages of the present invention are: in the present invention, the hard board layer can improve the deformation resistance and aging resistance of the rubber plug layer, and can effectively prevent harmful external elements from invading the rubber plug; it can also prevent the electrolyte on the core package from volatilizing through the rubber layer, so that the life of the aluminum electrolytic capacitor is guaranteed.

[0012] At the same time, the diameter of the through-holes through which the leads pass on the hard board layer is very small, which can limit the shaking of the leads of the anode guide pin and the cathode guide pin to a certain extent, thereby improving the vibration resistance of the aluminum electrolytic capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the structure of the long-life vibration-resistant aluminum electrolytic capacitor in Example 1.

[0014] Figure 2 Schematic diagram of the structure of the long-life vibration-resistant aluminum electrolytic capacitor in Example 2.

[0015] Figure 3 Schematic diagram of the structure of the long-life vibration-resistant aluminum electrolytic capacitor in Example 3.

[0016] Legend

[0017] 1. Aluminum shell; 2. Core package; 3. Seal; 31. Rubber plug layer; 32. Hard board layer; 4. Lead wire. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described in more comprehensive and detailed manner below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.

[0019] It should be noted that when an element is described as being "fixed, fixed, connected or communicated with" another element, it can be directly fixed, fixed, connected or communicated with the other element, or it can be indirectly fixed, fixed, connected or communicated with the other element through other intermediate connectors.

[0020] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention. Example 1

[0021] like Figure 1 The long-life, vibration-resistant aluminum electrolytic capacitor shown includes an aluminum shell 1, a seal 3, and a core package 2. The core package 2 is sealed within the aluminum shell 1 by the seal 3. The seal 3 includes a rubber layer and a hard plate layer 32, which are bonded together by PVA. The hard plate layer 32 is positioned on the side away from the core package 2. The rubber layer is connected to the anode and cathode conductors on the core package 2 by a waist extrusion process. In this embodiment, the hard plate layer 32 and the rubber layer are bonded together during assembly.

[0022] The rubber layer and the aluminum shell 1 are connected by a waist seal. The diameter of the hard board layer 32 is equal to that of the rubber layer, and the curling portion of the aluminum shell 1 is located on the hard board layer 32. In this embodiment, the hard board layer 32 can be made of PP, PU, ​​or phenolic paperboard.

[0023] In this embodiment, the rigid board layer 32 is provided with through-holes for the anode and cathode lead pins to pass through. The diameter of the through-holes is 0-0.5 mm larger than the diameter of the anode and cathode lead pins' leads 4. After the anode and cathode lead pins pass through the through-holes in the rigid board layer 32, the gap between the lead pins 4 and the rigid board layer 32 is very small. This effectively limits the shaking of the anode and cathode lead pins 4, thereby improving the vibration resistance of the aluminum electrolytic capacitor.

[0024] In this embodiment, the hard board layer 32 can improve the deformation resistance and aging resistance of the rubber plug layer 31, and can effectively prevent harmful external elements from invading the rubber plug; it can also prevent the electrolyte on the core package 2 from volatilizing through the rubber layer, so that the life of the aluminum electrolytic capacitor is guaranteed.

[0025] At the same time, in this embodiment, the diameter of the through hole through which the lead 4 passes on the hard board layer 32 is very small, which can limit the shaking of the lead 4 of the anode guide pin and the cathode guide pin to a certain extent, thereby improving the vibration resistance of the aluminum electrolytic capacitor. Example 2

[0026] like Figure 2 As shown, in this embodiment, the diameter of the hard plate layer 32 is smaller than the diameter of the rubber plug, and the hemming portion of the aluminum shell 1 is located on the rubber plug layer 31, thereby facilitating the hemming process between the aluminum shell 1 and the sealing member 3. The rest of this embodiment is the same as that of Example 1. Example 3

[0027] like Figure 3 As shown, in this embodiment, during assembly, the hard plate layer 32 and the rubber layer are separated and tightly bonded together by PVA during assembly. The rest of this embodiment is the same as that of embodiment 1.

Claims

1. A long-life, vibration-resistant aluminum electrolytic capacitor comprising an aluminum shell, a seal, and a core package; the core package is sealed within the aluminum shell by the seal; and characterized in that: The seal comprises a rubber layer and a hard plate layer, the rubber layer and the hard plate layer are in close contact with each other, and the hard plate layer is arranged on a side away from the core package; the rubber layer is connected to the anode guide pin and the cathode guide pin on the core package by waist extrusion.

2. The long-life vibration-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The rubber layer and the aluminum shell are connected by a waist seal.

3. The long-life vibration-resistant aluminum electrolytic capacitor according to claim 1, wherein: The hard board layer is provided with through holes through which the anode guide pin and the cathode guide pin pass. The diameter of the through holes is 0-0.5 mm larger than the lead diameter of the anode guide pin and the cathode guide pin.

4. The long-life vibration-resistant aluminum electrolytic capacitor according to claim 1, wherein: The diameter of the hard plate layer is equal to the diameter of the rubber layer, and the curling portion of the aluminum shell is located on the hard plate layer.

5. The long-life vibration-resistant aluminum electrolytic capacitor according to claim 1, wherein: The diameter of the hard plate layer is smaller than the diameter of the rubber plug, and the curling portion of the aluminum shell is located on the rubber plug layer.

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