Solid-liquid hybrid high-temperature-resistant aluminum electrolytic capacitor

Abstract

The utility model provides a solid-liquid hybrid high temperature resistant aluminum electrolytic capacitor, which comprises a shell, a core, a pin and a rubber plug, the core is sleeved in the shell, the rubber plug is arranged at the bottom of the shell, an outer explosion-proof ring and a pin explosion-proof ring are arranged at the top of the rubber plug, one end of the pin is connected with the core, and the other end of the pin penetrates through the rubber plug downwards to form a connecting end; the top of the pin is a flat connecting section, the connecting section is connected with the core, the pin at the bottom of the connecting section is gradually expanded to form a cone, the pin at the conical bottom extends to form a cylindrical embedding section, the pin at the bottom of the embedding section is gradually shrunk to form a transition section with a downward tip, and the connecting end is formed by extending from the bottom of the transition section. After the scheme is adopted, the structure is reasonable, the explosion-proof strength is large, and the anti-breakdown effect is good.

Description

Technical Field

[0001] This utility model relates to the field of electronic components technology, and in particular to a solid-liquid hybrid high-temperature resistant aluminum electrolytic capacitor. Background Technology

[0002] Traditional capacitor pin soldering sections are cylindrical or flat. While cylindrical soldering sections do not affect the electrolytic paper, they create large gaps on both sides of the pin, significantly increasing the core diameter. Furthermore, the small contact area between the pin and the electrode foil results in a weak weld. Flat pins increase the welding area, but burrs easily form along the edges, which can puncture the electrolytic paper under high temperature and pressure, causing electrolyte leakage. Gaps also form on both sides of the core, and when the internal pressure of the capacitor is high under high temperature and pressure, the pressure can impact the rubber stopper, causing it to detach and burst, damaging the circuit. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a solid-liquid hybrid high-temperature resistant aluminum electrolytic capacitor that prevents pressure impact on the rubber stopper, effectively increases the sealing performance of the rubber stopper, and fundamentally increases the explosion-proof strength of the capacitor. The structure after adopting this solution is reasonable, the explosion-proof strength is large, and the breakdown protection effect is good.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: a solid-liquid hybrid high-temperature resistant aluminum electrolytic capacitor, comprising a shell, a core, pins, and a rubber stopper. The core is fitted inside the shell, and a rubber stopper is provided at the bottom of the shell. An outer explosion-proof ring and a pin explosion-proof ring are provided at the top of the rubber stopper. One end of the pin is connected to the core, and the other end passes downward through the rubber stopper to form a connecting end. The top of the pin is a flat connecting section that connects to the core. The pin at the bottom of the connecting section gradually expands to form a cone shape. The pin at the bottom of the cone extends to form a cylindrical insert section. The pin at the bottom of the insert section gradually contracts to form a transition section with the tip pointing downward. The connecting end is formed by extending from the bottom of the transition section.

[0005] The core is formed by winding an anode foil, a cathode foil, and electrolytic paper. One end of the pin is connected to the corresponding anode foil or cathode foil, and a protective layer is provided at the connection point. The other end of the pin passes downward through the rubber plug to form a connection end.

[0006] The cross-section of the connection between the pin and the electrode foil is arc-shaped or crescent-shaped, with its inner arc surface facing the core axis, and the two sides of the pin are smoothly transitioned by an arc.

[0007] The bottom of the rubber stopper contracts to form a stepped contraction ring, and the top of the rubber stopper has two through-holes, located on both sides of the rubber stopper. The lower part of the through-holes contracts to form a cone shape, and an outer explosion-proof ring is provided at the top edge of the rubber stopper, and a needle explosion-proof ring is provided at the top of the rubber stopper at the edge of the needle.

[0008] The outer explosion-proof ring is integrally formed by extending upward from the top edge of the rubber stopper. The outer explosion-proof ring is annular and gradually narrows from top to bottom to form a funnel shape. The outer diameter of the top of the outer explosion-proof ring is equal to or smaller than the outer diameter of the rubber stopper.

[0009] The aforementioned pin explosion-proof ring surrounds the pin hole and extends integrally upward from the top of the rubber stopper. The pin explosion-proof ring is annular and gradually expands from top to bottom to form a conical shape.

[0010] In this invention, after adopting the above-mentioned solution, the connection between the pin and the electrode foil is covered with electrolytic paper to form a protective layer. Through the protection of the double-layer electrolytic paper, the solder joint of the pin is prevented from being punctured. When the gas pressure inside the capacitor is high, the pressure is applied to the explosion-proof ring, and the top of the explosion-proof ring begins to be compressed, causing the top of the explosion-proof ring to expand outward or compress inward, increasing the contact tightness between the rubber stopper and the outer shell and the pin, thereby preventing pressure from impacting the rubber stopper and effectively increasing the sealing performance of the rubber stopper. This fundamentally increases the explosion-proof strength of the capacitor. The structure after adopting this solution is reasonable, the explosion-proof strength is large, and the breakdown prevention effect is good. Attached Figure Description

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

[0012] Figure 2 This is an overall sectional view of the present invention.

[0013] Figure 3 This is a schematic diagram of the rubber stopper of this utility model.

[0014] Figure 4 This is a schematic diagram of the core of this utility model in the open state.

[0015] Figure 5 This is a schematic diagram of the pin layout of this utility model. Detailed Implementation

[0016] The present invention will be further described below with reference to all the accompanying drawings. A preferred embodiment of the present invention is as follows: (See attached drawings) Figure 1 To be continued Figure 5This embodiment describes a solid-liquid hybrid high-temperature resistant aluminum electrolytic capacitor, comprising a shell 1, a core 2, pins 3, and a rubber stopper 4. The core 2 is housed within the shell 1. The rubber stopper 4 is located at the bottom of the shell 1, and the top of the rubber stopper 4 has an outer explosion-proof ring 7 and a pin explosion-proof ring 8. One end of the pin 3 is connected to the core 2, and the other end passes downward through the rubber stopper 4 to form a connecting end. The top of the pin 3 is a flat connecting section that connects to the core 2. The bottom of the connecting section gradually expands to form a cone shape, and the bottom of the cone-shaped pin 3 extends to form a cylindrical insert section. The bottom of the insert section gradually contracts to form a downward-pointing transition section, and the connecting end extends from the bottom of the transition section. The cross-section of the pin 3 at the connection with the electrode foil is arc-shaped or crescent-shaped, with its inner arc surface facing the axis of the core 2. The two sides of the pin 3 have a smooth arc transition.

[0017] The core 2 is formed by winding an anode foil, a cathode foil, and electrolytic paper. One end of the pin 3 is connected to the corresponding anode foil or cathode foil, and a protective layer 9 is provided at the connection point. The other end of the pin 3 passes downward through the rubber stopper 4 to form a connecting end. The bottom of the rubber stopper 4 contracts to form a stepped contraction ring 5. The top of the rubber stopper 4 has two pin holes 6 that run vertically through it, located on both sides of the rubber stopper 4. The lower part of the pin holes 6 contracts to form a cone shape. An outer explosion-proof ring 7 is provided at the top edge of the rubber stopper 4. The outer explosion-proof ring 7 is integrally formed by extending upward from the top edge of the rubber stopper 4. The outer explosion-proof ring 7 is annular and gradually contracts from top to bottom to form a funnel shape. The outer diameter of the top of the outer explosion-proof ring 7 is equal to or smaller than the outer diameter of the rubber stopper 4. A pin explosion-proof ring 8 is provided at the top of the rubber stopper 4 at the edge of the pin 3. The pin explosion-proof ring 8 surrounds the pin holes 6 and is integrally formed by extending upward from the top of the rubber stopper 4. The pin explosion-proof ring 8 is annular and gradually expands from top to bottom to form a cone shape.

[0018] After adopting the above scheme, the connection between the pin and the electrode foil is covered with electrolytic paper to form a protective layer. This double-layer electrolytic paper protection prevents the pin's weld joint from being punctured. The weld section of the pin has an arc-shaped cross-section, which increases the contact area between the weld section and the electrode foil. Simultaneously, the arc-shaped weld section fits better with the wound core, and the sides of the weld section do not warp, preventing tearing of the electrolytic paper during winding. The lower part of the conical pin hole fits into the conical transition section of the pin, forming a tenon joint, effectively preventing electrolyte leakage from the pin hole. The pin consists of a connecting section, a conical section, an inlay section, a transition section, and a connecting end. The conical section forms a buffer zone between the core and the rubber stopper, preventing direct contact between the core and the rubber stopper and causing damage. It also insulates the rubber stopper from transferring heat directly to the core, effectively protecting it. The cylindrical inlay section increases the overall strength of the pin. The rubber stopper has a through hole (larger at the top, smaller at the bottom) that matches the inlay section, guiding the pin insertion. To prevent the pins from deforming during insertion into the rubber stopper, the bottom of the stopper contracts to form a stepped contraction ring. The stepped bottom of the rubber stopper and the bottom of the contraction surface of the outer shell are on the same plane. This reduces the overall height of the capacitor. With the use of explosion-proof rings, when the internal pressure of the capacitor is high under high temperature and pressure, when the pressure is applied to the outer explosion-proof ring, the top of the outer explosion-proof ring begins to be compressed, causing the top of the outer explosion-proof ring to expand outward and gradually increase the tightness of contact with the inner wall of the outer shell. The greater the internal pressure, the greater the tightness of contact between the outer explosion-proof ring and the inner wall of the outer shell. When the pressure is applied to the pin explosion-proof ring, the top of the pin explosion-proof ring begins to be compressed, causing the top of the pin explosion-proof ring to contract inward and contact with the outer circumference of the pin. The greater the internal pressure, the greater the tightness of contact between the pin explosion-proof ring and the pin. This prevents pressure from impacting the rubber stopper, effectively increasing the sealing performance of the rubber stopper, and fundamentally increasing the explosion-proof strength of the capacitor. The structure after adopting this solution is reasonable, with strong explosion-proof strength and good anti-breakdown effect.

[0019] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A solid-liquid hybrid high-temperature resistant aluminum electrolytic capacitor, comprising a shell (1), a core (2), pins (3), and a rubber stopper (4), characterized in that: The core (2) is fitted inside the outer shell (1). The bottom of the outer shell (1) is provided with a rubber stopper (4). The top of the rubber stopper (4) is provided with an outer explosion-proof ring (7) and a pin explosion-proof ring (8). One end of the pin (3) is connected to the core (2), and the other end passes downward through the rubber stopper (4) to form a connecting end. The top of the pin (3) is a flat connecting section, which is connected to the core (2). The pin (3) at the bottom of the connecting section gradually expands to form a cone shape. The pin (3) at the bottom of the cone shape extends to form a cylindrical inlay section. The pin (3) at the bottom of the inlay section gradually contracts to form a transition section with the tip pointing downward. The connecting end is formed by the extension of the bottom of the transition section. The core ( 2) It is formed by winding anode foil, cathode foil and electrolytic paper. One end of the pin (3) is connected to the corresponding anode foil or cathode foil. A protective layer (9) is provided at the connection. The other end of the pin (3) passes down through the rubber stopper (4) to form a connection end. The bottom of the rubber stopper (4) shrinks to form a stepped shrink ring (5). The top of the rubber stopper (4) is provided with a pin hole (6) that runs through from top to bottom. There are two pin holes (6), which are located on both sides of the rubber stopper (4). The lower part of the pin hole (6) shrinks to form a cone shape. An outer explosion-proof ring (7) is provided at the top edge of the rubber stopper (4). A pin explosion-proof ring (8) is provided at the top of the rubber stopper (4) at the edge of the pin (3).

2. The solid-liquid hybrid high-temperature resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The cross section at the connection between the pin (3) and the electrode foil is arc-shaped or crescent-shaped, with its inner arc surface facing the axis of the core (2), and the two sides of the pin (3) are smoothly transitioned by arc.

3. The solid-liquid hybrid high-temperature resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The outer explosion-proof ring (7) is formed by extending upward from the top edge of the rubber stopper (4). The outer explosion-proof ring (7) is annular and gradually shrinks from top to bottom to form a funnel shape. The outer diameter of the top of the outer explosion-proof ring (7) is equal to or smaller than the outer diameter of the rubber stopper (4).

4. A solid-liquid hybrid high-temperature resistant aluminum electrolytic capacitor according to claim 1, characterized in that: The pin explosion-proof ring (8) surrounds the pin hole (6) and is formed by extending integrally upward from the top of the rubber plug (4). The pin explosion-proof ring (8) is ring-shaped and gradually expands from top to bottom to form a cone shape.

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