An electrolytic capacitor protection device
By designing a plug-in structure with an internal protective sleeve and an external protective sleeve, the problems of overheating and dust and moisture in electrolytic capacitors are solved, achieving efficient heat dissipation and dual protection, extending the service life of electrolytic capacitors and the stability of electrical connections.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN YUNXING ELECTRONICS
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-21
AI Technical Summary
Existing electrolytic capacitor protection devices lack effective heat dissipation structures, making them prone to overheating and affecting their performance. They also cannot effectively block dust and moisture, leading to a shortened service life.
An electrolytic capacitor protection device is designed, including an inner protective sleeve and an outer protective sleeve. The inner protective sleeve has heat dissipation holes on its surface, and the outer protective sleeve has a heat dissipation and dustproof mesh installed on its surface. The device achieves dual protection through a plug-in structure. A cavity is formed between the inner and outer protective sleeves to improve heat dissipation efficiency, and the protection pins are connected by threads.
This provides dual protection for the electrolytic capacitor, improves heat dissipation efficiency, prevents dust and moisture from entering, extends the service life of the electrolytic capacitor, and ensures the stability and reliability of the electrical connection.
Smart Images

Figure CN224536878U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrolytic capacitor technology, specifically to an electrolytic capacitor protection device. Background Technology
[0002] Electrolytic capacitors are widely used in electronic devices, but their performance is susceptible to various factors. For example, excessively high temperatures increase internal pressure, potentially leading to electrolyte leakage and reduced capacitance. Overvoltage and overcurrent can cause capacitor breakdown or performance degradation. Existing protection measures suffer from low accuracy, high cost, and poor reliability, failing to effectively meet the requirements for reliable operation of electrolytic capacitors and urgently need improvement.
[0003] According to a patent application published on the internet (authorization announcement number: CN221861471U), "This utility model relates to a long-life protection device for electrolytic capacitors, comprising a housing, an element placed inside the housing, an installation mechanism on the housing, a rubber cap placed inside the housing, a fixing mechanism at the top of the rubber cap, and two guide pins fixed to the top of the element; the fixing mechanism includes two mounting boxes fixed to the top of the rubber cap, a moving rod slidably connected inside the mounting boxes, and a clamping plate fixed to one end of the moving rod. This long-life protection device for electrolytic capacitors, by providing an installation mechanism on the housing, can fix the rubber cap to the housing without the need for glue or bolts, and disassembly does not require tools such as screwdrivers, improving the disassembly efficiency of workers. The fixing mechanism at the top of the rubber cap allows for convenient fixing of the guide pins while reducing electrolyte evaporation, and also facilitates easy removal of the rubber cap for maintenance and replacement."
[0004] Based on the above, the applicant believes the following deficiencies exist:
[0005] The long-life protection device for this electrolytic capacitor includes a housing. A mounting mechanism on the housing allows for secure fixing of the cap to the housing without glue, bolts, or screws. Disassembly also eliminates the need for screwdrivers, improving efficiency. A fixing mechanism at the top of the cap allows for easy fixation of the leads while minimizing electrolyte evaporation. The cap can also be easily removed for maintenance and replacement. However, the device lacks a proper heat dissipation structure, making it difficult to effectively dissipate the heat generated during capacitor operation. This can easily lead to overheating, affecting performance and even shortening lifespan. Furthermore, it lacks protective components to prevent dust and impurities from entering, allowing dust to easily adhere to the capacitor surface and making it difficult to isolate moisture, all of which negatively impact the capacitor and reduce its lifespan. Utility Model Content
[0006] The purpose of this invention is to provide an electrolytic capacitor protection device to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: an electrolytic capacitor protection device, comprising an electrolytic capacitor, wherein the electrolytic capacitor has pins at its bottom end, a capacitor protection mechanism is provided on the surface of the electrolytic capacitor, and a pin protection mechanism is provided on the surface of the capacitor protection mechanism.
[0008] The capacitor protection mechanism includes an internal protective sleeve fitted over the surface of the electrolytic capacitor. The internal protective sleeve has heat dissipation holes on its surface. A first plug-in post is fixedly connected to the bottom of the internal protective sleeve. A base is located at the bottom of the electrolytic capacitor. A plug-in hole is located at the inner top of the base. An outer protective sleeve is installed on the top of the base. A heat dissipation and dustproof mesh is installed on the surface of the outer protective sleeve. A second plug-in post is fixedly connected to the bottom of the outer protective sleeve. A second plug-in hole is located at the outer top of the base. The internal protective sleeve, directly fitted over the surface of the electrolytic capacitor, provides initial physical protection, reducing damage from external impacts and friction. The outer protective sleeve, connected to the base via the second plug-in post, covers the outside of the internal protective sleeve, forming secondary protection and further enhancing the capacitor's protection capabilities. The heat dissipation holes on the surface of the internal protective sleeve facilitate heat dissipation during capacitor operation. The heat dissipation and dustproof mesh installed at the top not only does not hinder heat dissipation but also allows air to circulate within the cavity between the inner and outer protective sleeves, improving heat dissipation efficiency and preventing the capacitor from overheating and affecting its performance or lifespan. The heat dissipation and dustproof mesh of the outer protective sleeve effectively blocks dust and impurities from entering the protective mechanism, reducing the adverse effects of dust adhering to the capacitor surface. It also isolates moisture to a certain extent, extending the lifespan of the electrolytic capacitor. The inner protective sleeve is connected to the base through the first plug and plug hole, while the outer protective sleeve is connected to the base through the second plug and second plug hole. This plug-in structure makes the installation and removal of the protective sleeves convenient, facilitating the inspection, maintenance, or replacement of the electrolytic capacitor. The capacitor protection mechanism provides dual protection for the electrolytic capacitor, improving its safety while providing efficient heat dissipation, ensuring its working performance, and extending its lifespan.
[0009] Preferably, the built-in protective sleeve is connected to the base via a first plug and a plug hole, wherein the first plug is inserted into the plug hole.
[0010] Preferably, the outer protective sleeve is connected to the base via a second insertion post and a second insertion hole, wherein the second insertion post is inserted into the second insertion hole.
[0011] Preferably, the outer protective sleeve is equipped with a heat dissipation and dustproof mesh on its surface and top, and a cavity is formed between the inner protective sleeve and the outer protective sleeve.
[0012] Preferably, the pin protection mechanism includes a fixed base, with the fixed base fixedly connected to the bottom end of the base. The fixed base has a first connecting thread on its surface, and a protective cylinder is installed at the bottom end of the fixed base. An internal protective sleeve is fitted inside the protective cylinder, and a second connecting thread is provided at the top of the inside of the protective cylinder. The pin is disposed inside the protective cylinder. The protective cylinder and its internal internal protective sleeve can form a wrap-around protection for the pin, preventing damage from external impacts or bending during transportation, installation, or use, thus ensuring the structural integrity and electrical connection performance of the pin. The fixed base and the protective cylinder are connected by the first and second connecting threads. This connection method is stable and reliable, preventing the protective cylinder from loosening or falling off, ensuring continuous protection of the pin. The threaded connection structure makes the installation and disassembly of the protective cylinder simple and can be flexibly installed and removed according to actual needs. At the same time, the internal protective sleeve can adapt to pins of different specifications, enhancing the versatility of the mechanism. The pin protection mechanism can comprehensively protect the pin, preventing damage, and the overall connection is stable and highly reliable.
[0013] Preferably, the fixing seat and the protective cylinder are threaded together by a first connecting thread and a second connecting thread, and the pin is disposed inside the protective cylinder.
[0014] Compared with the prior art, this utility model provides an electrolytic capacitor protection device, which has the following features:
[0015] Beneficial effects:
[0016] 1. This electrolytic capacitor protection device is equipped with a capacitor protection mechanism. The inner protective sleeve is directly fitted onto the surface of the electrolytic capacitor, providing initial physical protection and reducing damage from external impacts and friction. The outer protective sleeve is connected to the base via a second connector, covering the inner protective sleeve to form secondary protection, further enhancing the capacitor's protection capabilities. The inner protective sleeve has ventilation holes on its surface to facilitate heat dissipation during capacitor operation. The heat dissipation and dustproof mesh installed on the surface and top of the outer protective sleeve does not obstruct heat dissipation but allows air circulation within the cavity between the inner and outer protective sleeves, improving heat dissipation efficiency and preventing the capacitor from overheating and affecting its performance or lifespan. The outer protective sleeve's ventilation... The heat-resistant dustproof mesh effectively blocks dust and impurities from entering the protective mechanism, reducing the adverse effects of dust adhering to the capacitor surface. It also isolates moisture to a certain extent, extending the electrolytic capacitor's lifespan. The inner protective sleeve connects to the base via the first insertion post and insertion hole, while the outer protective sleeve connects to the base via the second insertion post and second insertion hole. This plug-in structure makes installation and removal of the protective sleeve convenient, facilitating inspection, maintenance, or replacement of the electrolytic capacitor. The capacitor protection mechanism provides dual protection for the electrolytic capacitor, enhancing its safety while providing efficient heat dissipation to ensure its performance and extend its lifespan.
[0017] 2. This electrolytic capacitor protection device is equipped with a pin protection mechanism. The pins are located inside the protective cylinder. The protective cylinder and its internal built-in protective sleeve can form a protective enclosure for the pins, preventing damage from external impacts or bending during transportation, installation, or use. This ensures the structural integrity and electrical connection performance of the pins. The fixing base and the protective cylinder are connected by a first connecting thread and a second connecting thread. This connection method is stable and reliable, preventing the protective cylinder from loosening or falling off, ensuring continuous protection of the pins. The threaded connection structure makes the installation and disassembly of the protective cylinder simple and can be flexibly installed and removed according to actual needs. At the same time, the built-in protective sleeve can adapt to different pin specifications, enhancing the versatility of the mechanism. The pin protection mechanism can fully protect the pins and prevent damage. The overall connection is stable and highly reliable. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the separated structure of the capacitor protection mechanism of this utility model;
[0021] Figure 3 This is a schematic diagram of the pin protection mechanism of this utility model.
[0022] Figure 4 This is a schematic diagram of the built-in protective sleeve in the structure of this utility model.
[0023] In the diagram: 1. Electrolytic capacitor; 2. Pin; 3. Capacitor protection mechanism; 31. Built-in protective sleeve; 32. Heat dissipation hole; 33. First plug-in post; 34. Base; 35. Plug-in hole; 36. Outer protective sleeve; 37. Heat dissipation and dustproof mesh; 38. Second plug-in post; 39. Second plug-in hole; 4. Pin protection mechanism; 41. Fixing base; 42. First connecting thread; 43. Protective cylinder; 44. Built-in protective sleeve; 45. Second connecting thread. Detailed Implementation
[0024] 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.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] This utility model provides the following technical solution:
[0027] Example 1
[0028] Please see Figures 1-4 An electrolytic capacitor protection device includes an electrolytic capacitor 1, a pin 2 at the bottom of the electrolytic capacitor 1, a capacitor protection mechanism 3 on the surface of the electrolytic capacitor 1, and a pin protection mechanism 4 on the surface of the capacitor protection mechanism 3.
[0029] The capacitor protection mechanism 3 includes an internal protective sleeve 31, which is fitted onto the surface of the electrolytic capacitor 1. The internal protective sleeve 31 has heat dissipation holes 32 on its surface. A first insertion post 33 is fixedly connected to the bottom of the internal protective sleeve 31. A base 34 is located at the bottom of the electrolytic capacitor 1. An insertion hole 35 is opened at the inner top of the base 34. An outer protective sleeve 36 is installed on the top of the base 34. A heat dissipation and dustproof mesh 37 is installed on the surface of the outer protective sleeve 36. A second insertion post 38 is fixedly connected to the bottom of the outer protective sleeve 36. A second insertion hole 39 is opened at the outer top of the base 34. The internal protective sleeve 31 is directly fitted onto the surface of the electrolytic capacitor 1, providing initial physical protection for the capacitor body and reducing damage to the capacitor from external collisions and friction. The outer protective sleeve 36 is connected to the base 34 via the second insertion post 38, covering the outside of the internal protective sleeve 31 to form secondary protection, further enhancing the protection capability of the capacitor. The heat dissipation holes 32 on the surface of the internal protective sleeve 31 facilitate the dissipation of heat generated during capacitor operation. The heat dissipation and dustproof mesh 37 installed on the surface and top of the capacitor 6 does not hinder heat dissipation and allows air to circulate in the cavity between the inner and outer protective sleeves, improving heat dissipation efficiency and preventing the capacitor from being affected by overheating, thus affecting its performance or service life. The heat dissipation and dustproof mesh 37 of the outer protective sleeve 36 can effectively block dust and impurities from entering the protective mechanism, reducing the adverse effects of dust adhering to the capacitor surface. At the same time, it can isolate moisture to a certain extent, extending the service life of the electrolytic capacitor 1. The inner protective sleeve 31 is connected to the base 34 through the first plug-in post 33 and the plug-in hole 35, and the outer protective sleeve 36 is connected to the base 34 through the second plug-in post 38 and the second plug-in hole 39. This plug-in structure makes the installation and removal of the protective sleeve more convenient, facilitating the inspection, maintenance or replacement of the electrolytic capacitor 1. The setting of the capacitor protection mechanism 3 can achieve dual protection for the electrolytic capacitor 1, improve the safety of the electrolytic capacitor 1, and provide efficient heat dissipation, ensuring the working performance of the electrolytic capacitor 1 and extending the service life of the electrolytic capacitor 1.
[0030] The built-in protective sleeve 31 is connected to the base 34 through the first plug post 33 and the plug hole 35, with the first plug post 33 inserted into the plug hole 35.
[0031] The outer protective sleeve 36 is connected to the base 34 through the second plug post 38 and the second plug hole 39, with the second plug post 38 inserted into the second plug hole 39;
[0032] The outer protective sleeve 36 has heat dissipation and dustproof mesh 37 installed on its surface and top, and a cavity is opened between the inner protective sleeve 31 and the outer protective sleeve 36.
[0033] Example 2
[0034] Please see Figures 1-4Furthermore, based on Embodiment 1, the pin protection mechanism 4 further includes a fixed base 41. The fixed base 41 is fixedly connected to the bottom end of the base 34. A first connecting thread 42 is formed on the surface of the fixed base 41. A protective cylinder 43 is installed at the bottom end of the fixed base 41. An internal protective sleeve 44 is sleeved inside the protective cylinder 43. A second connecting thread 45 is formed on the top of the inside of the protective cylinder 43. The pin 2 is disposed inside the protective cylinder 43. The protective cylinder 43 and the internal protective sleeve 44 can form a wrap-around protection for the pin 2, preventing the pin 2 from being damaged by external impact or bending during transportation, installation, or use. To ensure the structural integrity and electrical connection performance of pin 2, the fixing base 41 and the protective cylinder 43 are connected by a first connecting thread 42 and a second connecting thread 45. This connection method is stable and reliable, preventing the protective cylinder 43 from loosening or falling off, and ensuring continuous protection of pin 2. The threaded connection structure makes the installation and disassembly of the protective cylinder 43 simple and can be flexibly installed and removed according to actual needs. At the same time, the built-in protective sleeve 44 can be adapted to pins 2 of different specifications, enhancing the versatility of the mechanism. The pin protection mechanism 4 can fully protect pin 2 and prevent damage. The overall connection is stable and highly reliable.
[0035] The fixed base 41 and the protective cylinder 43 are threaded together by the first connecting thread 42 and the second connecting thread 45, and the pin 2 is located inside the protective cylinder 43.
[0036] In actual operation, when this device is used, the electrolytic capacitor 1 is placed inside the base 34, and the inner protective sleeve 31 and outer protective sleeve 36 are installed respectively to protect the electrolytic capacitor 1. The inner protective sleeve 31 is directly fitted onto the surface of the electrolytic capacitor 1, which can form a preliminary physical protection for the capacitor body and reduce damage to the capacitor from external collisions and friction. The outer protective sleeve 36 is connected to the base 34 through the second plug post 38 and covers the outside of the inner protective sleeve 31 to form a secondary protection, further enhancing the protection capability of the capacitor. The surface of the inner protective sleeve 31 has heat dissipation holes 32 to facilitate the dissipation of heat generated during capacitor operation. The heat dissipation and dustproof mesh 37 installed on the surface and top of the outer protective sleeve 36 does not hinder heat dissipation and allows air to circulate in the cavity between the inner and outer protective sleeves, improving heat dissipation efficiency and preventing damage to the capacitor due to heat dissipation. Overheating can affect performance or lifespan. The heat dissipation and dustproof mesh 37 of the outer protective sleeve 36 can effectively block dust and impurities from entering the protective mechanism, reducing the adverse effects of dust adhering to the capacitor surface. At the same time, it can isolate moisture to a certain extent, extending the lifespan of the electrolytic capacitor 1. The inner protective sleeve 31 is connected to the base 34 through the first plug-in post 33 and the plug-in hole 35. The outer protective sleeve 36 is connected to the base 34 through the second plug-in post 38 and the second plug-in hole 39. This plug-in structure makes the installation and removal of the protective sleeve more convenient, facilitating the inspection, maintenance or replacement of the electrolytic capacitor 1. The setting of the capacitor protection mechanism 3 can achieve dual protection for the electrolytic capacitor 1, improve the safety of the electrolytic capacitor 1, and provide efficient heat dissipation, ensuring the working performance of the electrolytic capacitor 1 and extending the lifespan of the electrolytic capacitor 1.
[0037] Pin 2 is located inside the protective cylinder 43. The protective cylinder 43 and its internal built-in protective sleeve 44 can form a wrap-around protection for pin 2, preventing pin 2 from being damaged by external impact or bending during transportation, installation or use, and ensuring the structural integrity and electrical connection performance of pin 2. The fixing base 41 and the protective cylinder 43 are connected by a first connecting thread 42 and a second connecting thread 45. This connection method is stable and reliable, preventing the protective cylinder 43 from loosening or falling off, and ensuring continuous protection of pin 2. The threaded connection structure makes the installation and disassembly of the protective cylinder 43 simple and can be flexibly installed and removed according to actual needs. At the same time, the built-in protective sleeve 44 can be adapted to pin 2 of different specifications, enhancing the versatility of the mechanism. The pin protection mechanism 4 can fully protect pin 2 and prevent damage. The overall connection is stable and highly reliable. When needed, the electrolytic capacitor 1 can be used by removing the pin protection mechanism 4.
[0038] 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. An electrolytic capacitor protection device, comprising an electrolytic capacitor (1), characterized in that: The electrolytic capacitor (1) has a pin (2) at its bottom end, a capacitor protection mechanism (3) is provided on the surface of the electrolytic capacitor (1), and a pin protection mechanism (4) is provided on the surface of the capacitor protection mechanism (3). The capacitor protection mechanism (3) includes an internal protective sleeve (31), which is fitted onto the surface of the electrolytic capacitor (1). The internal protective sleeve (31) has heat dissipation holes (32) on its surface. A first plug-in post (33) is fixedly connected to the bottom of the internal protective sleeve (31). A base (34) is provided at the bottom of the electrolytic capacitor (1). A plug-in hole (35) is provided at the inner top of the base (34). An external protective sleeve (36) is installed on the top of the base (34). A heat dissipation and dustproof mesh (37) is installed on the surface of the external protective sleeve (36). A second plug-in post (38) is fixedly connected to the bottom of the external protective sleeve (36). A second plug-in hole (39) is provided at the outer top of the base (34).
2. The electrolytic capacitor protection device according to claim 1, characterized in that: The built-in protective sleeve (31) is connected to the base (34) through the first plug post (33) and the plug hole (35), with the first plug post (33) inserted into the plug hole (35).
3. The electrolytic capacitor protection device according to claim 1, characterized in that: The outer protective sleeve (36) is connected to the base (34) through the second plug (38) and the second plug hole (39), with the second plug (38) inserted into the second plug hole (39).
4. The electrolytic capacitor protection device according to claim 1, characterized in that: The outer protective sleeve (36) is equipped with a heat dissipation and dustproof mesh (37) on its surface and top, and a cavity is provided between the inner protective sleeve (31) and the outer protective sleeve (36).
5. The electrolytic capacitor protection device according to claim 1, characterized in that: The pin protection mechanism (4) includes a fixed base (41), the bottom end of the base (34) is fixedly connected to the fixed base (41), the surface of the fixed base (41) is provided with a first connecting thread (42), the bottom end of the fixed base (41) is installed with a protective cylinder (43), the inside of the protective cylinder (43) is fitted with an internal protective sleeve (44), and the top of the inside of the protective cylinder (43) is provided with a second connecting thread (45).
6. The electrolytic capacitor protection device according to claim 5, characterized in that: The fixed base (41) and the protective cylinder (43) are threaded together by the first connecting thread (42) and the second connecting thread (45), and the pin (2) is located inside the protective cylinder (43).