A liquid leakage-proof solid capacitor

Abstract

The utility model belongs to solid capacitor technical field, and disclose a kind of solid capacitor of leakage-proof, including capacitor main part;The surface of capacitor main part is equipped with connection leakage-proof subassembly, the connection leakage-proof subassembly includes the anti-leakage sleeve of symmetrical sleeve in the both ends of capacitor main part and the sealing ring and the tightening ring for sealing of installation in the anti-leakage sleeve inside, rubber sleeve, connecting plate, installation strip, positioning groove;The surface of connecting plate is equipped with stable connection subassembly, the stable connection subassembly includes the threaded rod of plug-in in the connecting plate surface at bottom, the utility model has the advantages that the capacitor both ends connection after assembly can be sealed, avoid internal electrolyte from main body and end face connection place leakage and so on, cause capacitor self capacity attenuation, equivalent series resistance increase, cause equipment power supply unstable, greatly improve the service life of capacitor, improve capacitor safety performance.

Description

Technical Field

[0001] This invention belongs to the field of solid-state capacitor technology, specifically a leak-proof solid-state capacitor. Background Technology

[0002] Solid-state capacitors, as core components for energy storage and release in electronic devices, are widely used in consumer electronics, automotive electronics, and industrial control, especially in scenarios requiring high frequency, high temperature, and high reliability, such as on-board power modules for new energy vehicles and power supply units for 5G communication equipment. Their performance stability directly determines the operational safety and lifespan of the entire device. As electronic devices develop towards miniaturization and high integration, the installation space for solid-state capacitors is constantly shrinking, making the requirements for their structural sealing increasingly stringent. They must not only withstand complex operating conditions such as long-term high temperature, vibration, and humidity changes, but also ensure complete isolation between the internal electrolyte and the external environment to avoid performance abnormalities caused by sealing failure. Currently, most mainstream solid-state capacitors on the market are encapsulated by pressing or welding metal shells to leads. The connection between the two ends and the shell is a weak point in the seal. Since existing solid-state capacitors cannot effectively seal the connection between the two ends, leakage is very likely to occur during actual use. When the electrolyte inside a capacitor expands slightly due to temperature changes, unsealed connections can become channels for electrolyte leakage, causing it to slowly overflow. Electrolyte leakage not only causes capacitor capacitance decay and increased equivalent series resistance, leading to unstable power supply to equipment, but in severe cases, it can also corrode the pins of surrounding electronic components and the PCB board, creating conductive path failures and even causing short circuits, fires, and other safety accidents. In fields with extremely high safety requirements, such as new energy vehicles and medical equipment, this type of leakage can lead to serious consequences such as vehicle power interruption and malfunction of medical equipment, increasing maintenance costs and threatening the lives and property of users.

[0003] Therefore, a leak-proof solid capacitor is proposed to address the above problems. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a leak-proof solid capacitor that can seal the connection points at both ends of the assembled capacitor, preventing leakage of internal electrolyte from the body and end face connection points, thus avoiding capacitor capacity decay, increased equivalent series resistance, and unstable power supply to equipment. This significantly improves the capacitor's lifespan and enhances its safety performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof solid capacitor, comprising a capacitor body; The surface of the capacitor body is equipped with a connection anti-leakage assembly, which includes anti-leakage sleeves symmetrically sleeved at both ends of the capacitor body, as well as sealing rings installed inside the anti-leakage sleeves, tightening rings for sealing, rubber sleeves, connecting plates, mounting strips, and positioning grooves. The surface of the connecting plate is equipped with a stable connection assembly, which includes a threaded rod inserted into the bottom surface of the connecting plate, nuts threaded to both ends of the threaded rod, and mounting holes for fixing.

[0006] Preferably, the sealing ring tightly wraps around the end face connection of the capacitor body, the tightening ring is installed on the surface of the leak-proof sleeve and tightly wraps around the outer side of the capacitor body, and the rubber sleeve is installed on the surface of the tightening ring and tightly wraps around the outer side of the capacitor body.

[0007] Preferably, the two sets of connecting plates are respectively installed on the surfaces of the two leak-proof sleeves, the mounting strip is installed on the surface of the upper connecting plate, the positioning groove is formed on the surface of the lower connecting plate, and the mounting strip is inserted into the interior of the positioning groove.

[0008] Preferably, the opening size of the tightening ring gradually decreases along the capacitor body, forming a gradual tightening structure that adapts to the outer contour of the capacitor body.

[0009] Preferably, the two rubber sleeves are symmetrically and tightly wrapped around the outer surface of the capacitor body.

[0010] Preferably, the connection points between the sealing ring, the tightening ring, and the rubber sleeve and the capacitor body are all filled with high-temperature resistant sealant.

[0011] Preferably, the mounting hole is formed on the surface of the mounting strip, and both ends of the threaded rod pass through the mounting hole and the connecting plate, extend to the outside of the connecting plate, and are threadedly connected to the nut.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model incorporates a connection anti-leakage component. By setting the connection anti-leakage component at both ends of the capacitor body, it integrates multiple sealing structures such as anti-leakage sleeves, sealing rings, and tightening rings. Compared with the existing sealing methods that rely solely on insulating glue or a single sealing rubber ring, it forms a composite protection of physical barrier and structural compression, fundamentally blocking the channel for electrolyte leakage from the connection at both ends, and significantly improving the reliability of the seal.

[0013] 2. This utility model features a stable connection component. By using the threaded rod and nut, the two leak-proof sleeves are firmly fixed by the connecting plate, preventing the leak-proof component from shifting under conditions such as vibration and high temperature. At the same time, the insertion and connection of the mounting strip and the positioning groove ensures accurate fitting of the leak-proof sleeves and prevents damage to the sealing gap due to positional deviation, thus meeting the usage requirements of high-frequency vibration scenarios such as automotive electronics and industrial control. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the connecting plate and the mounting strip of this utility model when they are separated; Figure 3 This is a schematic diagram of the structure of the leak-proof sleeve and sealing ring of this utility model; Figure 4 This is a schematic diagram of the structure of the leak-proof sleeve and tightening ring of this utility model; Figure 5 This is a schematic cross-sectional view of the connecting plate of this utility model.

[0015] In the diagram: 1. Capacitor body; 2. Connecting anti-leakage assembly; 21. Anti-leakage sleeve; 22. Sealing ring; 23. Tightening ring; 24. Rubber sleeve; 25. Connecting plate; 26. Mounting strip; 27. Positioning groove; 3. Stable connection assembly; 31. Threaded rod; 32. Nut; 33. Mounting hole. 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] like Figures 1 to 5 As shown, this utility model provides a leak-proof solid capacitor, including a capacitor body 1; The capacitor body 1 is equipped with a connection anti-leakage assembly 2. The connection anti-leakage assembly 2 includes anti-leakage sleeves 21 symmetrically sleeved at both ends of the capacitor body 1, a sealing ring 22 installed inside the anti-leakage sleeve 21, a tightening ring 23 for sealing, a rubber sleeve 24, a connecting plate 25, a mounting strip 26, and a positioning groove 27. The sealing ring 22 is tightly wrapped around the end face connection of the capacitor body 1. The tightening ring 23 is installed on the surface of the leak-proof sleeve 21 and tightly wrapped around the outer side of the capacitor body 1. The rubber sleeve 24 is installed on the surface of the tightening ring 23 and tightly wrapped around the outer side of the capacitor body 1. By setting the connecting leak-proof components 2 at both ends of the capacitor body 1, the multiple sealing structures such as the leak-proof sleeve 21, sealing ring 22, and tightening ring 23 are integrated. Compared with the existing sealing methods that rely only on insulating glue or a single sealing rubber ring, a composite protection of physical barrier and structural compression is formed, which blocks the channel for electrolyte leakage from the connection of both ends from the root and greatly improves the sealing reliability.

[0018] Two sets of connecting plates 25 are respectively installed on the surfaces of the two leak-proof sleeves 21. The mounting strip 26 is installed on the surface of the upper connecting plate 25. The positioning groove 27 is opened on the surface of the lower connecting plate 25. The mounting strip 26 is inserted into the interior of the positioning groove 27. The insertion and cooperation between the mounting strip 26 and the positioning groove 27 provides a clear assembly benchmark for the two leak-proof sleeves 21, ensuring that the leak-proof sleeves 21 are symmetrical in position and have consistent fit at both ends of the capacitor body 1, and can be installed and fixed.

[0019] The opening size of the tightening ring 23 gradually decreases along the capacitor body 1, forming a gradual tightening structure that adapts to the outer contour of the capacitor body 1. The structure of the tightening ring 23 with the opening gradually decreasing along the capacitor body 1 can accurately adapt to the outer contour of the capacitor body 1, realize gradual compression from the end to the middle, greatly improve the fit between the tightening ring 23 and the capacitor body 1, and enhance the sealing effect.

[0020] Two rubber sleeves 24 are symmetrically and tightly wrapped around the outer surface of the capacitor body 1, protecting the central area of ​​the capacitor body 1 and greatly improving the leakage prevention effect of the structure.

[0021] The connection points between the sealing ring 22, the tightening ring 23, and the rubber sleeve 24 and the capacitor body 1 are all filled with high-temperature resistant sealant. The high-temperature sealant can penetrate into the micro-gap between each sealing component and the capacitor body 1, and after curing, it forms a dense sealing layer, eliminating the tiny gaps that traditional mechanical seals cannot cover, and further blocking the electrolyte leakage channel.

[0022] A stabilizing connection assembly 3 is mounted on the surface of the connecting plate 25. The stabilizing connection assembly 3 includes a threaded rod 31 that is inserted into the surface of the bottom connecting plate 25, nuts 32 that are threaded to both ends of the threaded rod 31, and mounting holes 33 for fixing. Mounting holes 33 are formed on the surface of mounting strip 26, and both ends of threaded rod 31 pass through mounting holes 33 and connecting plate 25, extending to the outside of connecting plate 25 and threadedly connected to nut 32. Through the cooperation of threaded rod 31 and nut 32, the two leak-proof sleeves 21 are firmly fixed by connecting plate 25, preventing displacement of the leak-proof liquid assembly 2 under vibration, high temperature and other conditions. At the same time, the insertion and cooperation of mounting strip 26 and positioning groove 27 ensures accurate assembly of leak-proof sleeves 21, preventing damage to the sealing gap due to positional displacement, and meeting the usage requirements of high-frequency vibration scenarios such as automotive electronics and industrial control.

[0023] Among them, the structure of capacitor body 1 is existing technology, its working principle is a well-known technology, and its model is selected according to the actual use.

[0024] Working principle and process: Two leak-proof sleeves 21 are symmetrically placed on both ends of the capacitor body 1, so that the sealing ring 22 is tightly fitted to the capacitor body 1. The sealing ring 22 is tightly fitted at the end face connection of both ends of the capacitor body 1, ensuring that the sealing ring 22 completely covers the connection gap area and blocks the electrolyte leakage channel; at the same time, high temperature resistant sealant is filled at the contact gap between the sealing ring 22 and the capacitor body 1, and a sealing barrier is formed after the sealant cures. Then, the tightening ring 23 is installed on the outer surface of the leak-proof sleeve 21. Utilizing the gradual structure of the tightening ring 23 along the capacitor body 1 where the opening gradually decreases, mechanical pressure is used to make the tightening ring 23 tightly wrap around the outer side of the capacitor body 1, squeezing the capacitor body 1 to fit, eliminating potential gaps, and forming a second layer of sealing protection. Two rubber sleeves 24 symmetrically and tightly wrap around the outer surface of the capacitor body 1, covering the main body of the capacitor body 1, and forming a third sealing layer, thus realizing a multi-layer sealing system of sealing ring 22, tightening ring 23, and rubber sleeve 24. After the sealing structure of the connection anti-leakage component 2 is assembled, the mounting strip 26 on the surface of the upper connecting plate 25 is aligned with the positioning groove 27 on the surface of the lower connecting plate 25, and the mounting strip 26 is inserted into the positioning groove 27. Through the limiting effect of the positioning groove 27, the two anti-leakage sleeves 21 are ensured to be symmetrical and stable on the capacitor body 1, so as to avoid sealing failure due to assembly misalignment. One end of the threaded rod 31 is passed through the reserved hole in the lower connecting plate 25 and then through the mounting hole 33 on the surface of the mounting strip 26. Nuts 32 are respectively fitted on both ends of the threaded rod 31 and rotated until tightened. The axial pressure is generated by the threaded engagement between the threaded rod 31 and the nut 32, so that the upper and lower connecting plates 25 and the mounting strip 26 are tightly fitted, thereby firmly fixing the two leak-proof sleeves 21 to both ends of the capacitor body 1, preventing the leak-proof sleeves 21 from shifting under vibration conditions and ensuring the long-term stability of the sealing structure. During the use of the capacitor, when the internal electrolyte expands due to temperature changes, the multi-layer sealing system works synergistically: the sealing ring 22 directly prevents the electrolyte from penetrating to the end face connection, the gradual tightening ring 23 counteracts the electrolyte expansion force through its own structural pressure, and the rubber sleeve 24 further improves the anti-leakage effect; at the same time, the stable connection component 3, through the fixing action of the threaded rod 31 and the nut 32, ensures that the connection anti-leakage component 2 always fits the capacitor body 1, avoiding the sealing gap from increasing due to vibration, and ultimately achieving a long-term anti-leakage effect.

[0025] 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 liquid-proof solid capacitor, comprising a capacitor body (1); Its features are: The capacitor body (1) is equipped with a connection anti-leakage assembly (2). The connection anti-leakage assembly (2) includes anti-leakage sleeves (21) symmetrically sleeved at both ends of the capacitor body (1), a sealing ring (22) installed inside the anti-leakage sleeves (21), a tightening ring (23) for sealing, a rubber sleeve (24), a connecting plate (25), a mounting strip (26), and a positioning groove (27). The surface of the connecting plate (25) is equipped with a stable connection assembly (3), which includes a threaded rod (31) inserted into the surface of the bottom connecting plate (25), nuts (32) threaded to both ends of the threaded rod (31), and mounting holes (33) for fixing.

2. The liquid-proof solid capacitor according to claim 1, characterized in that: The sealing ring (22) is tightly wrapped around the end face connection of the capacitor body (1), the tightening ring (23) is installed on the surface of the leak-proof sleeve (21), and the tightening ring (23) is tightly wrapped around the outer side of the capacitor body (1), the rubber sleeve (24) is installed on the surface of the tightening ring (23), and the rubber sleeve (24) is tightly wrapped around the outer side of the capacitor body (1).

3. A liquid-proof solid capacitor according to claim 1, characterized in that: The two sets of connecting plates (25) are respectively installed on the surfaces of the two leak-proof sleeves (21), the mounting strip (26) is installed on the surface of the upper connecting plate (25), the positioning groove (27) is opened on the surface of the lower connecting plate (25), and the mounting strip (26) is inserted into the interior of the positioning groove (27).

4. A liquid-proof solid capacitor according to claim 1, characterized in that: The opening size of the tightening ring (23) gradually decreases along the capacitor body (1), forming a gradual tightening structure that adapts to the outer contour of the capacitor body (1).

5. A liquid-proof solid capacitor according to claim 1, characterized in that: The two rubber sleeves (24) are symmetrically and tightly wrapped around the outer surface of the capacitor body (1).

6. A liquid-proof solid capacitor according to claim 1, characterized in that: The connection points of the sealing ring (22), the tightening ring (23), and the rubber sleeve (24) with the capacitor body (1) are all filled with high-temperature resistant sealant.

7. A liquid-proof solid capacitor according to claim 1, characterized in that: The mounting hole (33) is formed on the surface of the mounting strip (26), and both ends of the threaded rod (31) pass through the mounting hole (33) and the connecting plate (25), and extend to the outside of the connecting plate (25), and are threadedly connected to the nut (32).

Images