Long-life electrolytic capacitor with explosion-proof structure

Abstract

The application relates to the technical field of electrolytic capacitors, in particular to a long-service-life electrolytic capacitor with an anti-explosion structure, which comprises a shell assembly, an anti-explosion pressure relief assembly and a heat-conducting and heat-dissipating assembly. The top of the shell assembly is provided with a sealing cover, the anti-explosion pressure relief assembly is installed at the center of the sealing cover, and the heat-conducting and heat-dissipating assembly is arranged in the shell and in contact with the inner wall. The anti-explosion pressure relief assembly gradually releases internal gas through the micro-holes of the pressure relief sheet, so that the shell is prevented from being broken; the heat-conducting and heat-dissipating assembly reduces the working temperature by the synergistic effect of the heat-conducting plate and the heat-dissipating fins. The safety, the heat-dissipating performance and the service life of the capacitor are improved by optimizing the structural design and the material selection, the problem that the anti-explosion performance and the long service life are difficult to be considered simultaneously in the prior art is solved, and the application is suitable for the field of electronic components.

Description

Technical Field

[0001] This utility model belongs to the field of electronic component technology, specifically a long-life electrolytic capacitor with an explosion-proof structure. Background Technology

[0002] In the field of electronic components, the lifespan and safety of electrolytic capacitors are among the important indicators for evaluating their performance. Currently, some technical solutions have emerged on the market to improve the lifespan of electrolytic capacitors by improving the sealing structure or optimizing materials. However, these solutions often struggle to simultaneously meet the requirements of explosion-proof performance and long lifespan. Furthermore, existing explosion-proof designs typically rely on a single safety valve structure, which may not be able to completely prevent capacitors from rupturing due to excessive internal pressure under extreme conditions.

[0003] Some existing technologies improve explosion-proof performance by increasing the shell thickness or setting a single pressure relief point. Specific implementations include installing a scored safety valve on the top of the capacitor or using a high-strength metal shell. However, such designs may encounter problems in practical applications, such as delayed safety valve opening or shell material aging, thus affecting overall reliability. Therefore, we propose an improvement: a long-life electrolytic capacitor with an explosion-proof structure. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing electrolytic capacitors in combining explosion-proof performance with long lifespan, and to provide a long-life electrolytic capacitor with an explosion-proof structure. This invention improves the safety and service life of the capacitor through optimized internal structure design and material selection.

[0005] To achieve the aforementioned objectives and address the aforementioned problems, this utility model provides a long-life electrolytic capacitor with an explosion-proof structure, comprising a housing assembly, an explosion-proof pressure relief assembly, and a heat-conducting and heat-dissipating assembly. The housing assembly has a sealing cap on its top, the explosion-proof pressure relief assembly is installed in the central area of ​​the sealing cap, and the heat-conducting and heat-dissipating assembly is located inside the housing assembly and contacts the inner wall of the housing assembly. Through the synergistic effect of the explosion-proof pressure relief assembly and the heat-conducting and heat-dissipating assembly, the internal pressure of the capacitor is reduced and the heat dissipation efficiency is improved.

[0006] The explosion-proof pressure relief assembly includes a pressure relief plate and multiple support columns. The pressure relief plate is a circular thin sheet, and its edge is fixed to the inner surface of the sealing cover by multiple support columns. The central area of ​​the pressure relief plate has several micropores, each with a diameter less than 0.1 mm, and these micropores are evenly distributed. When the internal pressure of the capacitor increases, the pressure relief plate deforms under stress, and the micropores gradually expand to release the internal gas, thereby preventing the casing from rupturing due to excessive pressure.

[0007] As a preferred technical solution of this application, the housing assembly includes an outer shell and an inner liner. The outer shell is made of high-strength aluminum alloy, and the inner liner is made of high-temperature resistant ceramic material. The inner liner is fixed to the inner wall surface of the outer shell by an adhesive. The inner liner effectively isolates the capacitor's interior from the influence of the external environment and enhances the corrosion resistance of the housing.

[0008] As a preferred technical solution of this application, the heat-conducting and heat-dissipating assembly includes a heat-conducting plate and multiple heat dissipation fins. The heat-conducting plate is a rectangular metal plate, and its bottom is tightly fitted to the inner wall of the housing assembly. The heat dissipation fins are vertically fixed to the top surface of the heat-conducting plate, and the heat dissipation fins are arranged at equal intervals. The heat-conducting plate conducts the heat generated inside the capacitor to the heat dissipation fins, and the heat dissipation fins accelerate heat dissipation by increasing the surface area, thereby reducing the operating temperature of the capacitor.

[0009] As a preferred technical solution of this application, the outer surface of the sealing cap is provided with reinforcing ribs, which are distributed in a ring and have a height of 2 mm to 5 mm. The reinforcing ribs can enhance the mechanical strength of the sealing cap and prevent the sealing cap from deforming or being damaged due to external impact.

[0010] As a preferred technical solution of this application, the bottom of the pressure relief plate is provided with a buffer pad, which is made of elastic rubber material and has a thickness of 1 mm to 3 mm. The buffer pad can provide a certain buffering effect when the pressure relief plate is deformed under force, preventing the pressure relief plate from breaking due to excessive instantaneous pressure.

[0011] As a preferred technical solution of this application, the bottom of the housing assembly is provided with a mounting base. The mounting base has a cylindrical structure with an outer diameter the same as that of the housing assembly. A threaded hole is provided inside the mounting base for connection to external equipment. The mounting base facilitates the fixing and installation of the capacitor, while also improving the stability of the overall structure.

[0012] As a preferred technical solution of this application, the heat-conducting plate is provided with slots on both sides. The slots are used to fix the electrode plates inside the capacitor. The width of the slots is slightly larger than the thickness of the electrode plates to ensure that the electrode plates can be firmly embedded in the slots. The slot design not only simplifies the installation process of the electrode plates, but also reduces the displacement of the electrode plates caused by vibration during operation.

[0013] As a preferred technical solution of this application, the surface of the heat dissipation fins is coated with a thermally conductive coating made of graphene material, the thermally conductive coating having a thickness of 0.05 mm to 0.1 mm. The thermally conductive coating can further improve the thermal conductivity of the heat dissipation fins, thereby accelerating the heat dissipation rate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: By incorporating explosion-proof pressure relief components and heat dissipation components, gas is gradually released through the micropores of the pressure relief plate when the internal pressure of the capacitor increases, preventing the casing from rupturing due to excessive pressure. Simultaneously, the synergistic effect of the heat-conducting plate and heat dissipation fins effectively reduces the capacitor's operating temperature, extending its service life. Furthermore, the inner liner enhances the casing's corrosion resistance, while the reinforcing ribs and buffer pads further improve the overall reliability of the capacitor. This invention solves the problem of balancing explosion-proof performance and long lifespan in existing electrolytic capacitors, providing a safe, reliable, and long-lasting electrolytic capacitor solution for the electronic components industry. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a partial enlarged view of the explosion-proof pressure relief component of this utility model.

[0017] Figure 3 This is a schematic diagram of the heat conduction and heat dissipation component structure of this utility model.

[0018] Figure 4 This is a cross-sectional view of the housing assembly of this utility model.

[0019] Figure 5 This is a top view of the sealing cap of this utility model.

[0020] The attached figures are labeled as follows: 1. Housing assembly; 2. Sealing cover; 3. Explosion-proof pressure relief assembly; 4. Heat conduction and heat dissipation assembly; 5. Pressure relief plate; 6. Micropores; 7. Support column; 8. Buffer pad; 9. Heat conduction plate; 10. Heat dissipation fins; 11. Reinforcing ribs; 12. Mounting base; 13. Inner liner; 14. Outer shell. Detailed Implementation

[0021] This utility model provides a long-life electrolytic capacitor with an explosion-proof structure, the specific implementation of which is as follows: Combined with... Figures 1 to 5 As shown, the electrolytic capacitor includes a housing assembly 1, a sealing cover 2, an explosion-proof pressure relief assembly 3, and a heat-conducting and heat-dissipating assembly 4. The housing assembly 1 consists of an outer shell 14 and an inner liner 13. The outer shell 14 is made of high-strength aluminum alloy, and the inner liner 13 is made of high-temperature resistant ceramic material, fixed to the inner wall surface of the outer shell 14 by an adhesive. A tightly fitted layered structure is formed between the inner liner 13 and the outer shell 14, as shown... Figure 4As shown, the inner liner 13 has a uniform thickness and covers the entire inner wall of the outer casing 14 to ensure that the external environment will not cause corrosion or other adverse effects on the inside of the capacitor. The sealing cover 2 is located on top of the casing assembly 1 and is connected to the outer casing 14 by welding. The outer surface of the sealing cover 2 is provided with reinforcing ribs 11, which are arranged in a ring, with a height of 2 mm to 5 mm and a width of 1 mm to 3 mm. The arrangement and shape of the reinforcing ribs 11 are as follows: Figure 5 As shown, this significantly enhances the mechanical strength of the sealing cap 2.

[0022] The explosion-proof pressure relief assembly 3 is installed in the central area of ​​the sealing cover 2, and its structure is as follows: Figure 2 As shown, the device includes a pressure relief plate 5, support pillars 7, and a buffer pad 8. The pressure relief plate 5 is a thin, circular sheet with a diameter slightly smaller than the inner diameter of the sealing cover 2. Its edge is fixed to the inner surface of the sealing cover 2 by multiple support pillars 7. There are six support pillars 7, evenly distributed along the edge of the pressure relief plate 5. Each support pillar 7 is 3 mm high and 1 mm in diameter, and is made of stainless steel, providing good resistance to deformation. Several micro-holes 6 are formed in the central area of ​​the pressure relief plate 5. The diameter of each micro-hole 6 is less than 0.1 mm, and the spacing between the micro-holes is 0.5 mm to 1 mm, evenly distributed in the central area of ​​the pressure relief plate 5. A buffer pad 8 is placed at the bottom of the pressure relief plate 5. The buffer pad 8 is made of elastic rubber material with a thickness of 1 mm to 3 mm. The shape of the buffer pad 8 matches the pressure relief plate 5 and can completely cover the bottom surface of the pressure relief plate 5. The buffer pad 8 is fixed to the bottom surface of the pressure relief plate 5 by adhesive. When the internal pressure of the capacitor increases, the pressure relief plate 5 is slightly deformed by the force. The buffer pad 8 can provide a certain buffering effect to prevent the pressure relief plate 5 from breaking or being damaged due to excessive instantaneous pressure.

[0023] The heat conduction and heat dissipation component 4 is disposed inside the housing component 1 and contacts the inner wall of the housing component 1, and its structure is as follows: Figure 3As shown, the assembly includes a heat-conducting plate 9 and multiple heat dissipation fins 10. The heat-conducting plate 9 is a rectangular metal plate made of aluminum. The bottom of the heat-conducting plate 9 is tightly fitted to the inner wall of the housing assembly 1, and thermal grease is applied between the contact surfaces to improve heat conduction efficiency. The heat dissipation fins 10 are vertically fixed to the top surface of the heat-conducting plate 9. There are 10 heat dissipation fins 10, each with a height of 10 mm and a thickness of 1 mm. The spacing between the heat dissipation fins 10 is 2 mm, and they are evenly arranged on the surface of the heat-conducting plate 9. The surface of the heat dissipation fins 10 is coated with a thermally conductive coating made of graphene material, with a thickness of 0.05 mm to 0.1 mm. The coating covers the entire outer surface of the heat dissipation fins 10, further improving the thermal conductivity of the heat dissipation fins 10. The heat-conducting plate 9 has slots on both sides for fixing the electrode plates inside the capacitor. The width of the slots is slightly larger than the thickness of the electrode plates to ensure that the electrode plates can be stably embedded in the slots. The depth of the slots is 2 mm and the length is the same as the length of the heat-conducting plate 9.

[0024] The bottom of the housing assembly 1 is provided with a mounting base 12, which is a cylindrical structure with the same outer diameter as the housing assembly 1. The mounting base 12 has a threaded hole with a diameter of 5 mm and a depth of 10 mm for connecting to external equipment. The mounting base 12 is fixed to the bottom of the housing assembly 1 by welding. The material of the mounting base 12 is the same as that of the outer shell 14, both being high-strength aluminum alloy. The outer surface of the mounting base 12 is anodized to improve its corrosion resistance.

[0025] During actual operation, gas may be generated inside the electrolytic capacitor due to electrolyte decomposition or other chemical reactions, leading to an increase in internal pressure. When the internal pressure reaches a certain threshold, the explosion-proof pressure relief component 3 begins to function. The pressure relief plate 5 undergoes slight deformation under stress, and the micropores 6 gradually expand to release the internal gas, thereby preventing the casing from rupturing due to excessive pressure. The deformation process of the pressure relief plate 5 is limited by the support column 7, which effectively prevents the pressure relief plate 5 from excessive deformation or detachment. At the same time, the buffer pad 8 provides a certain buffering effect when the pressure relief plate 5 is deformed under stress, preventing the pressure relief plate 5 from breaking due to excessive instantaneous pressure. The heat dissipation component 4 conducts the heat generated inside the capacitor to the heat dissipation fins 10 through the heat-conducting plate 9. The heat dissipation fins 10 accelerate heat dissipation by increasing the surface area, thereby reducing the operating temperature of the capacitor. The presence of the thermally conductive coating further improves the thermal conductivity of the heat dissipation fins 10, allowing heat to be dissipated to the surrounding environment more quickly.

[0026] In practical applications, this electrolytic capacitor can be widely used in power electronic equipment, communication equipment, and industrial control systems. For example, in power electronic equipment, electrolytic capacitors are typically used for filtering, energy storage, and voltage regulation. Due to the complex operating environment and frequent load changes in these devices, electrolytic capacitors are prone to damage from overheating or overvoltage. This invention significantly improves the safety and lifespan of the capacitor through optimized internal structure design and material selection, meeting the requirements of high-reliability applications. In communication equipment, electrolytic capacitors are commonly used in power modules and signal processing circuits. The explosion-proof pressure relief component 3 and heat dissipation component 4 of this invention can effectively cope with temperature rises and pressure changes caused by high-frequency switching operations, ensuring stable operation of the equipment. Furthermore, in industrial control systems, electrolytic capacitors need to withstand large current surges and long-term continuous operation. The design of the inner liner 13 and reinforcing ribs 11 of this invention enhances the corrosion resistance and mechanical strength of the shell, thereby adapting to harsh working environments.

[0027] The specific embodiments of this utility model describe in detail the connection relationships, positional relationships, and mutual cooperation relationships between the various components, ensuring that those skilled in the art can implement the technical solution based on the contents of the specification. The materials, dimensions, and processing techniques of all components have been rigorously selected and optimized to meet the performance requirements of practical applications.

[0028] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0029] In power electronic equipment, electrolytic capacitors are commonly used for filtering, energy storage, and voltage regulation. Due to the complex operating environment and frequent load changes in these devices, electrolytic capacitors are prone to damage from overheating or overvoltage. The following details how this invention achieves a synergistic effect of explosion-proof and heat dissipation functions through the steps of actual operation, thereby improving the safety and lifespan of the capacitor.

[0030] First, during capacitor installation, the housing assembly 1 is secured to an external device via the mounting base 12 at its bottom. The mounting base 12 has threaded holes for easy connection to the external device, and its material is the same as the outer casing 14—high-strength aluminum alloy—which undergoes anodizing to improve corrosion resistance. This design ensures the capacitor's stability in harsh operating environments. Furthermore, the inner liner 13 of the housing assembly 1 is made of high-temperature resistant ceramic material, effectively isolating the capacitor from external environmental influences and preventing performance degradation caused by corrosive gases or liquids.

[0031] Secondly, when the capacitor starts working, gas may be generated inside due to electrolyte decomposition or other chemical reactions, leading to an increase in internal pressure. At this time, the explosion-proof pressure relief component 3 begins to function. The pressure relief plate 5 deforms slightly under stress, and the micropores 6 in its central area gradually expand to release the internal gas. The micropores 6 are designed with a diameter of less than 0.1 mm and a spacing of 0.5 mm to 1 mm. This uniformly distributed structure enables gradual pressure relief as the pressure gradually increases, preventing the casing from rupturing due to excessive instantaneous pressure. The presence of the support column 7 limits the deformation range of the pressure relief plate 5, preventing excessive deformation or detachment, thereby ensuring the controllability of the pressure relief process. At the same time, the buffer pad 8 provides a certain buffering effect when the pressure relief plate 5 deforms under stress, preventing the pressure relief plate 5 from breaking or being damaged due to excessive instantaneous pressure. This series of designs together achieve the explosion-proof function of the capacitor under extreme conditions.

[0032] Next, as the capacitor continues to operate, the heat generated inside needs to be dissipated promptly to prevent overheating and performance degradation. The thermally conductive heat dissipation component 4 plays a crucial role in this process. The bottom of the heat-conducting plate 9 is tightly fitted to the inner wall of the housing assembly 1, and thermal grease is applied to further improve heat conduction efficiency. The heat-conducting plate 9 conducts the heat generated inside the capacitor to the heat dissipation fins 10. The heat dissipation fins 10 accelerate heat dissipation by increasing their surface area, thereby reducing the capacitor's operating temperature. Furthermore, the graphene thermally conductive coating on the surface of the heat dissipation fins 10 further enhances heat dissipation performance, allowing heat to dissipate to the surrounding environment more quickly. This design significantly reduces the risk of performance degradation due to overheating of the capacitor.

[0033] Electrolytic capacitors are commonly used in communication equipment, particularly in power modules and signal processing circuits. High-frequency switching operations cause temperature rises and pressure changes, placing higher demands on the stable operation of capacitors. This invention effectively addresses these challenges through the synergistic action of the explosion-proof pressure relief component 3 and the heat dissipation component 4. For example, when the internal pressure of the power module increases due to high-frequency switching operations, the pressure relief plate 5 gradually releases gas through the micropores 6, preventing pressure buildup; simultaneously, the heat-conducting plate 9 and the heat dissipation fins 10 quickly transfer heat to the external environment, ensuring stable operation of the equipment.

[0034] Furthermore, in industrial control systems, electrolytic capacitors need to withstand large current surges and long periods of continuous operation. The design of the inner liner 13 and reinforcing ribs 11 in this invention enhances the corrosion resistance and mechanical strength of the casing, thus adapting to harsh working environments. The reinforcing ribs 11 on the outer surface of the sealing cover 2 are arranged in a ring, with a height of 2 mm to 5 mm and a width of 1 mm to 3 mm, significantly enhancing the mechanical strength of the sealing cover 2 and preventing deformation or damage due to external impacts. This design ensures the reliability of the capacitor during long-term continuous operation.

[0035] In summary, this invention significantly improves the safety and lifespan of the capacitor through optimized internal structural design and material selection. The explosion-proof pressure relief component 3 achieves a gradual pressure relief function through the synergistic action of the pressure relief plate 5, support column 7, and buffer pad 8; the heat dissipation component 4 significantly reduces the operating temperature of the capacitor through the efficient heat conduction design of the heat-conducting plate 9 and heat dissipation fins 10. These designs collectively solve the problem in the prior art that electrolytic capacitors are difficult to balance explosion-proof performance and long lifespan, providing a safe, reliable, and long-lasting electrolytic capacitor solution for the field of electronic components.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A long-life electrolytic capacitor with an explosion-proof structure, characterized in that, It includes a housing assembly (1), a sealing cover (2), an explosion-proof pressure relief assembly (3), and a heat conduction and heat dissipation assembly (4). The housing assembly (1) is provided with a sealing cover (2) on its top. The explosion-proof pressure relief assembly (3) is installed in the central area of ​​the sealing cover (2). The heat conduction and heat dissipation assembly (4) is located inside the housing assembly (1) and contacts the inner wall of the housing assembly (1).

2. A long-life electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that, The explosion-proof pressure relief assembly (3) includes a pressure relief plate (5), a support column (7), and a buffer pad (8). The pressure relief plate (5) is a circular thin sheet, and its edge is fixed to the inner surface of the sealing cover (2) by multiple support columns (7). The central area of ​​the pressure relief plate (5) has several micro holes (6). The diameter of the micro holes (6) is less than 0.1 mm, and the spacing between the micro holes (6) is 0.5 mm to 1 mm. The buffer pad (8) is made of elastic rubber material with a thickness of 1 mm to 3 mm. The buffer pad (8) is set at the bottom of the pressure relief plate (5) and fixed by an adhesive.

3. A long-life electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that, The housing assembly (1) includes an outer shell (14) and an inner liner (13). The outer shell (14) is made of high-strength aluminum alloy, and the inner liner (13) is made of high-temperature resistant ceramic material. The inner liner (13) is fixed to the inner wall surface of the outer shell (14) by an adhesive.

4. A long-life electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that, The heat dissipation assembly (4) includes a heat-conducting plate (9) and multiple heat dissipation fins (10). The heat-conducting plate (9) is a rectangular metal plate with its bottom tightly attached to the inner wall of the housing assembly (1). The heat dissipation fins (10) are vertically fixed to the top surface of the heat-conducting plate (9). The spacing between the heat dissipation fins (10) is 2 mm. The surface of the heat dissipation fins (10) is coated with a thermally conductive coating made of graphene material, and the thickness of the thermally conductive coating is 0.05 mm to 0.1 mm.

5. A long-life electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that, The outer surface of the sealing cover (2) is provided with reinforcing ribs (11), which are distributed in a ring and have a height of 2 mm to 5 mm and a width of 1 mm to 3 mm.

6. A long-life electrolytic capacitor with an explosion-proof structure according to claim 1, characterized in that, The bottom of the housing assembly (1) is provided with a mounting base (12). The mounting base (12) is a cylindrical structure with the same outer diameter as the housing assembly (1). The mounting base (12) has a threaded hole with a diameter of 5 mm and a depth of 10 mm.

7. A long-life electrolytic capacitor with an explosion-proof structure according to claim 4, characterized in that, The heat-conducting plate (9) has slots on both sides. The slots are used to fix the electrode plates inside the capacitor. The width of the slots is slightly greater than the thickness of the electrode plates. The depth of the slots is 2 mm and the length is the same as the length of the heat-conducting plate (9).

8. A long-life electrolytic capacitor with an explosion-proof structure according to claim 2, characterized in that, There are 6 support columns (7) evenly distributed on the edge of the pressure relief plate (5). Each support column (7) is 3 mm high and 1 mm in diameter. The support column (7) is made of stainless steel.

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