Aluminum electrolytic capacitor with corrosion protection

Abstract

The utility model discloses an anticorrosive aluminum electrolytic capacitor relates to capacitor field, including capacitor body and top anticorrosion structure is provided, capacitor body top is provided with end cover, and anticorrosion structure includes anticorrosion coating, and end cover seal edge crimping fills a layer of anticorrosion coating, capacitor body in -line fixed mounting has two vertical setting terminal, and the long strip cavity that is matched with terminal is seted up in the top of end cover, and the top of end cover is seted up groove, and the recessed surface mounting of groove has the layer net of smearing, and anticorrosion coating is smeared in the layer net area and covers completely, and the thickness of layer net is less than anticorrosion coating thickness, and anticorrosion coating adopts epoxy resin material, has good chemical corrosion resistance and insulation performance, can effectively prevent capacitor body and terminal from being eroded by external environment, and anticorrosion coating can provide enough protection barrier, prolongs the service life of capacitor.

Description

Technical Field

[0001] This utility model relates to the field of capacitors, specifically a corrosion-resistant aluminum electrolytic capacitor. Background Technology

[0002] A capacitor is basically composed of two conductors with an insulator (dielectric) sandwiched between them. Charges move in an electric field due to the force they experience, and the insulator (dielectric) between the conductors impedes this movement, allowing charge to accumulate on the conductors and thus storing it. Therefore, a capacitor has the ability to store electrical charge, which is the basis for its function as a device for storing electrical energy.

[0003] After traditional capacitor end caps are sealed, gaps will appear after a period of use, which can easily lead to moisture intrusion, causing corrosion and shortening the service life. Utility Model Content

[0004] The purpose of this invention is to provide a corrosion-resistant aluminum electrolytic capacitor that improves the efficiency and quality of slurry processing, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant aluminum electrolytic capacitor, comprising a capacitor body and a corrosion-resistant structure on the top, wherein the top of the capacitor body is provided with an end cap, the corrosion-resistant structure includes a corrosion-resistant coating, and the end cap is sealed with a layer of corrosion-resistant coating; two vertically arranged terminals are embedded and fixedly installed in the capacitor body, and the top of the end cap is provided with an elongated cavity matching the terminals, the top of the terminals is provided through the elongated cavity, and a protective sleeve structure is provided at the through end.

[0006] Preferably, the top of the end cap has a groove, and a trowel is installed in the groove. The anti-corrosion coating is applied to the area of ​​the trowel and completely covers it. The thickness of the trowel is less than the thickness of the anti-corrosion coating.

[0007] Preferably, the anti-corrosion coating is made of epoxy resin material, and the thickness of the anti-corrosion coating is 3-5 mm.

[0008] Preferably, the protective sleeve structure includes a telescopic sleeve and a rubber sleeve. The grouting mesh has a through cavity that matches the terminal. The grouting mesh is fixedly connected to the telescopic sleeve at the through cavity position. The other end of the telescopic sleeve is fixedly connected to the rubber sleeve. The rubber sleeve is fitted onto the through end of the terminal.

[0009] Preferably, the outer surface of the bottom end of the telescopic sleeve is provided with a serrated groove, and the telescopic sleeve has a wavy shape.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: The anti-corrosion coating is made of epoxy resin material, which has good chemical corrosion resistance and insulation properties, and can effectively prevent the capacitor body and terminals from being corroded by the external environment. The anti-corrosion coating can provide a sufficient protective barrier and extend the service life of the capacitor. The setting of the trowel mesh further enhances the anti-corrosion effect. Its fine mesh structure helps to increase the contact area between the anti-corrosion coating and the end cap surface, making the coating more firmly attached to the end cap and less likely to fall off. At the same time, the trowel mesh also plays a certain buffering role, which can reduce the direct impact of external factors on the anti-corrosion coating, further improving the corrosion resistance and service life of the capacitor. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention viewed from the front.

[0013] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention after explosive decomposition.

[0014] Figure 4 This is a three-dimensional structural diagram of the plastering mesh and protective sleeve structure in this utility model.

[0015] In the diagram: 1. Capacitor body; 2. Anti-corrosion structure; 201. Anti-corrosion coating; 202. Long cavity; 203. Mesh layer; 204. Groove; 3. Protective sleeve structure; 301. Telescopic sleeve; 302. Rubber sleeve; 303. Through cavity; 304. Serrated groove; 4. Terminal; 5. End cap. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4The diagram shows a corrosion-resistant aluminum electrolytic capacitor, comprising a capacitor body 1 and a corrosion-resistant structure 2 on the top. The capacitor body 1 has an end cap 5 on its top. The corrosion-resistant structure 2 includes an anti-corrosion coating 201, and the end cap 5 is sealed with a layer of anti-corrosion coating 201. Two vertically arranged terminals 4 are embedded and fixedly installed inside the capacitor body 1. The end cap 5 has an elongated cavity 202 on its top that matches the terminals 4. The top of the terminals 4 penetrates the elongated cavity 202, and a protective sleeve structure 3 is fitted over the penetrating end.

[0018] By setting an anti-corrosion structure 2 on the top of the capacitor body 1 and pouring an anti-corrosion coating 201 around the end cap seal, the anti-corrosion performance of the capacitor is effectively improved, preventing the capacitor from degrading or failing due to corrosion during use, thereby extending the service life of the capacitor.

[0019] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The top of the end cap 5 has a groove 204, and a trowel 203 is installed in the groove 204. The anti-corrosion coating 201 is applied to the area of ​​the trowel 203 and completely covers it. The thickness of the trowel 203 is less than the thickness of the anti-corrosion coating 201.

[0020] The application of the coating mesh 203 further enhances the anti-corrosion effect. Its fine mesh structure helps to increase the contact area between the anti-corrosion coating 201 and the surface of the end cap 5, making the coating adhere more firmly to the end cap and less likely to fall off. At the same time, the coating mesh 203 also plays a certain buffering role, which can reduce the direct impact of external factors on the anti-corrosion coating 201, further improving the corrosion resistance and service life of the capacitor.

[0021] The anti-corrosion coating 201 is made of epoxy resin material and has a thickness of 5 mm.

[0022] This epoxy resin material possesses excellent chemical corrosion resistance and insulation properties, effectively preventing the capacitor body 1 and terminals 4 from being corroded by the external environment. Furthermore, the 5 mm thickness ensures that the anti-corrosion coating 201 provides a sufficient protective barrier, extending the capacitor's service life. Simultaneously, this thickness facilitates processing and application, ensuring coating consistency and stability.

[0023] See Figure 1 , Figure 3 and Figure 4The protective sleeve structure 3 includes a telescopic sleeve 301 and a rubber sleeve 302. The sizing mesh 203 has a through cavity 303 that matches the terminal 4. The sizing mesh 203 is fixedly connected to the telescopic sleeve 301 at the position of the through cavity 303. The other end of the telescopic sleeve 301 is fixedly connected to the rubber sleeve 302. The rubber sleeve 302 is sleeved on the through end of the terminal 4.

[0024] The telescopic sleeve 301 is made of rubber elastic material, which has good elasticity and resilience and can adapt to the extension length of the terminal 4. When the terminal 4 is not connected to power, the rubber sleeve 302 and the telescopic sleeve 301 are always fitted on the extended end of the terminal 4 to achieve a protective function. During use, the telescopic sleeve 301 and the rubber sleeve 302 can be directly cut off and removed to ensure normal use.

[0025] See Figure 4 The telescopic sleeve 301 has a serrated groove 304 on the outer surface of its bottom end, and the telescopic sleeve 301 has a wavy shape. This design not only enhances the stability of the telescopic sleeve 301 and prevents it from sliding or falling off during use, but also improves its tensile strength, making it more adaptable to the changes in the extension length of the terminal 4. The serrated groove 304 makes it easier for users to cut the telescopic sleeve 301 during use, thus improving the convenience of use.

[0026] The capacitor body 1 is mainly composed of aluminum foil, electrolytic paper, electrolyte, terminals 4, end caps 5, leads, tape, shell, and tubing. This new product has an epoxy resin infused at the top and rolled edge sealing, which can effectively flow and disperse on the device surface, solidifying into a protective film of a certain thickness. After curing, the product is environmentally friendly and safe, has high strength, excellent moisture and temperature resistance, and excellent sealing effect. In addition, the cured capacitor exhibits excellent resistance to chemical solvents, effectively blocking the intrusion of organic, inorganic, and halogen ions, preventing corrosion failure of the aluminum electrolytic capacitor. It also prevents the aluminum electrolytic capacitor from being intruded by external moisture, dust, and corrosive gases during use, thus avoiding product failure.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising" – "including" or any other variations thereof are intended to cover non-exclusive inclusion, such that a process – method – article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process – method – article or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant aluminum electrolytic capacitor, comprising a capacitor body (1) and a corrosion-resistant structure (2) disposed on the top, characterized in that, The capacitor body (1) is provided with an end cap (5) on the top. The anti-corrosion structure (2) includes an anti-corrosion coating (201). The end cap (5) is sealed and rolled with an anti-corrosion coating (201). Two vertically arranged terminals (4) are embedded and fixedly installed inside the capacitor body (1). The end cap (5) has a long cavity (202) that matches the terminals (4) on the top. The top of the terminals (4) passes through the long cavity (202) and is fitted with a protective sleeve structure (3) at the end.

2. The corrosion-resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The top of the end cap (5) is provided with a groove (204), and a trowel (203) is installed in the groove (204). The anti-corrosion coating (201) is applied to the area of ​​the trowel (203) and completely covers it. The thickness of the trowel (203) is less than the thickness of the anti-corrosion coating (201).

3. The corrosion-resistant aluminum electrolytic capacitor according to claim 2, characterized in that: The anti-corrosion coating (201) is made of epoxy resin material, and the thickness of the anti-corrosion coating (201) is 3-5 mm.

4. The corrosion-resistant aluminum electrolytic capacitor according to claim 2, characterized in that: The protective sleeve structure (3) includes a telescopic sleeve (301) and a rubber sleeve (302). The trowel (203) has a through cavity (303) that matches the terminal (4). The trowel (203) is fixedly connected to the telescopic sleeve (301) at the position of the through cavity (303). The other end of the telescopic sleeve (301) is fixedly connected to the rubber sleeve (302). The rubber sleeve (302) is sleeved on the through end of the terminal (4).

5. The corrosion-resistant aluminum electrolytic capacitor according to claim 4, characterized in that: The telescopic sleeve (301) has a serrated groove (304) on the outer surface of its bottom end, and the telescopic sleeve (301) has a wavy shape.

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