An aluminum electrolytic capacitor with a novel lead-out structure

Abstract

This utility model relates to the field of aluminum electrolytic capacitors and discloses an aluminum electrolytic capacitor with a novel lead-out structure. The capacitor includes a capacitor body with a sealing layer fixedly connected to its outer wall. A lead-out terminal assembly is disposed at the bottom of the capacitor body. The lead-out terminal assembly includes an anode terminal and a cathode terminal, both of which adopt a segmented structure, including an internal connecting section, a sealed transition section, and an external connecting section. The internal connecting section is welded to the internal electrodes of the capacitor body, and the sealed transition section penetrates the sealing layer at the bottom of the capacitor body. In this utility model, the segmented design improves connection stability, and the flat, bent design increases the heat dissipation area, thus achieving applicability to various electronic devices and demonstrating good application prospects. It avoids problems such as poor sealing, poor heat dissipation, and inconvenient installation associated with traditional lead-out structures, thereby improving the practicality of the aluminum electrolytic capacitor with the novel lead-out structure.

Description

Technical Field

[0001] This utility model relates to the field of aluminum electrolytic capacitors, and in particular to an aluminum electrolytic capacitor with a novel lead-out structure. Background Technology

[0002] Aluminum electrolytic capacitors are electronic components that use aluminum foil as electrodes and electrolytic paper as the dielectric. They are characterized by large capacity and low cost, and are commonly used for functions such as charge storage and filtering. They are widely used in power supplies, home appliances and other fields. The reason for using aluminum electrolytic capacitors with a new lead structure is that the traditional lead structure has problems such as high internal resistance, weak high current carrying capacity, poor mechanical stability, limited size and inconvenient maintenance. The new structure improves the internal resistance, enhances the resistance to high current surges, strengthens mechanical stability, reduces size and facilitates maintenance by increasing the number of lead points, optimizing the fixing method, simplifying the internal layout and adding detection structures. This better meets the high performance, miniaturization and high reliability requirements of modern electronic equipment.

[0003] Existing aluminum electrolytic capacitors with novel lead-out structures operate on the same core principle as traditional aluminum electrolytic capacitors. Both are based on the electrochemical characteristics of the electrolytic material, using an anodic oxide film as the medium to store charge and the electrolyte to achieve ionic conductivity. During charging, an aluminum oxide film forms on the surface of the anode aluminum foil as the medium, and ions in the electrolyte move directionally and form an electric double layer at the interface between the anodic oxide film and the electrolyte to store charge. During discharging, the charge in the electric double layer is released through the external circuit, and the ions move in the opposite direction to form a discharge current. The novel lead-out structure improves the lead-out method by increasing the number of lead-out points and optimizing the connection between the lead and the electrode foil, thereby reducing internal resistance, optimizing current distribution, improving high current carrying capacity and mechanical stability, without changing this core charging and discharging principle.

[0004] However, in the practical application of aluminum electrolytic capacitors with novel lead-out structures, some designs still have significant shortcomings. The sealing problem of the lead-out structure has not been completely solved. Vibration during equipment operation can easily cause gaps between the seal and the lead-out terminals, allowing electrolyte to leak out. This not only reduces capacitor performance but also corrodes surrounding circuit components. At the same time, the compact design of the novel lead-out structure often neglects heat dissipation requirements, leading to heat accumulation at the connection between the lead-out terminals and the core package. Under high-temperature environments, this can accelerate material aging and shorten service life. In addition, some improved lead-out structures have complex shapes and poor compatibility with circuit board installation, increasing the difficulty of automated soldering and raising the error rate of manual installation. These problems collectively restrict their practical value in industrial equipment, automotive electronics, and other scenarios. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an aluminum electrolytic capacitor with a novel lead-out structure, aiming to improve the problems of poor sealing, poor heat dissipation, and inconvenient installation of the lead-out structure in the prior art during equipment use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an aluminum electrolytic capacitor with a novel lead-out structure, comprising a capacitor body, wherein a sealing layer is fixedly connected to the outer wall of the capacitor body, and a lead-out terminal assembly is provided at the bottom of the capacitor body;

[0007] The lead-out terminal assembly includes an anode terminal and a cathode terminal. Both the anode terminal and the cathode terminal adopt a segmented structure, including an internal connection section, a sealed transition section, and an external connection section. The internal connection section is welded to the internal electrode of the capacitor body. The sealed transition section penetrates the sealing layer at the bottom of the capacitor body. The external connection section is flat and extends to both sides. The sealing layer is made of composite rubber material. The surface of the external connection section is plated with a silver layer.

[0008] As a further description of the above technical solution:

[0009] Each of the external connecting segments is fixedly connected to a connecting ring at its top, and each connecting ring has multiple connecting holes at its bottom.

[0010] As a further description of the above technical solution:

[0011] Each of the connecting rings has multiple sliding grooves at its bottom and a fixing groove inside each of the connecting rings.

[0012] As a further description of the above technical solution:

[0013] The sliding grooves are arranged in a circular array at the bottom of the connecting ring, and the fixing grooves are arranged in a circular array inside the connecting ring.

[0014] As a further description of the above technical solution:

[0015] Each of the connecting rings is slidably connected to a protective shell at its bottom, and the protective shells are arranged in a symmetrical array at the bottom of the sealing layer.

[0016] As a further description of the above technical solution:

[0017] Each of the protective shells has multiple elastic plates fixedly connected to its top, and the elastic plates are arranged in a ring array on the top of the protective shell.

[0018] As a further description of the above technical solution:

[0019] Each of the elastic plates has a fixing strip fixedly connected to one side, the outer wall of each elastic plate is slidably connected to the inside of the sliding groove, and the outer wall of each fixing strip is slidably connected to the inside of the fixing groove.

[0020] As a further description of the above technical solution:

[0021] Each of the protective shells has multiple connecting posts fixedly connected to its top, and the outer wall of each connecting post is slidably connected to the inside of a connecting hole.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the segmented design improves connection stability and sealing performance, the flat bending design increases heat dissipation area and installation flexibility, the composite rubber sealing layer effectively prevents electrolyte leakage, and the silver plating reduces contact resistance. Thus, it achieves the effect of being suitable for various electronic devices during equipment use and has good application prospects. It avoids problems such as poor sealing of the lead structure, poor heat dissipation, and inconvenient installation during equipment use, thereby improving the practicality of aluminum electrolytic capacitors with novel lead structures.

[0024] 2. In this utility model, the protective shell is first held and pulled downwards to cause the inner wall of the connecting ring to squeeze the fixing strip and dislodge it from the fixing groove. At the same time, the connecting post is dislodged from the connecting hole, exposing the external connecting section. This achieves the effect of protecting the external connecting section during equipment use and removing the protective shell when needed. It avoids the problem of poor connection effect caused by bending of the external connecting section under external force during equipment use, thereby improving the efficiency of the aluminum electrolytic capacitor with the new lead structure. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an aluminum electrolytic capacitor with a novel lead-out structure proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the internal structure of the sealing layer of an aluminum electrolytic capacitor with a novel lead-out structure proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the internal structure of the fixing ring of an aluminum electrolytic capacitor with a novel lead-out structure proposed in this utility model.

[0028] Figure 4 for Figure 3 A magnified view of the structure at point A in the middle;

[0029] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0030] Legend:

[0031] 1. Capacitor body; 2. Sealing layer; 3. Internal connection section; 4. Sealed transition section; 5. External connection section; 6. Connecting ring; 7. Connecting hole; 8. Sliding groove; 9. Fixing groove; 10. Protective shell; 11. Elastic plate; 12. Fixing strip; 13. Connecting post. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1-3 The present invention provides an embodiment of an aluminum electrolytic capacitor with a novel lead-out structure, comprising a capacitor body 1, a sealing layer 2 fixedly connected to the outer wall of the capacitor body 1 for sealing the capacitor body 1, and a lead-out terminal assembly provided at the bottom of the capacitor body 1 for connecting to a circuit board to be used.

[0034] The lead-out terminal assembly includes an anode terminal and a cathode terminal. Both the anode terminal and the cathode terminal adopt a segmented structure, including an internal connection section 3, a sealed transition section 4, and an external connection section 5. The internal connection section 3 is welded to the internal electrode of the capacitor body 1 and is used to connect the external connection section 5 to the capacitor body 1. The sealed transition section 4 penetrates the sealing layer 2 at the bottom of the capacitor body 1 and is used to penetrate the sealing layer 2 to allow current to flow. The external connection section 5 is flat and extends to both sides for connection with the circuit board. The sealing layer 2 is made of composite rubber material, and the surface of the external connection section 5 is plated with a silver layer.

[0035] Specifically, to improve equipment performance, a segmented design is adopted, dividing both the anode and cathode terminals into three sections: an internal connection section 3, a sealed transition section 4, and an external connection section 5. This allows for tighter connections between the various components of the lead-out structure, with precise interlocking at each connection point, significantly improving overall connection stability and preventing loosening caused by vibration. The flat, bent design of the external connection section 5 extends the contact area of ​​the lead-out terminals, increasing heat dissipation space and accelerating heat dissipation. It also allows for flexible adaptation to different circuit board layouts during installation, improving installation flexibility. Meanwhile, the composite rubber sealing layer 2 is flexible and has strong sealing properties, tightly wrapping the lead-out parts and effectively preventing electrolyte penetration and leakage. The silver plating on the surface of the external connection section 5 is smooth and uniform, with excellent conductivity, significantly reducing contact resistance and making current transmission more efficient and smooth.

[0036] Reference Figure 4 and Figure 5 Each external connecting segment 5 has a connecting ring 6 fixedly connected to its top for connecting the protective shell 10. Each connecting ring 6 has multiple connecting holes 7 at its bottom for accommodating connecting posts 13. Each connecting ring 6 also has multiple sliding grooves 8 at its bottom for accommodating elastic plates 11. Each connecting ring 6 has a fixing groove 9 inside for accommodating fixing strips 12. The sliding grooves 8 are arranged in a circular array at the bottom of the connecting ring 6, and the fixing grooves 9 are arranged in a circular array inside the connecting ring 6. Each connecting ring 6 has a protective shell 10 slidably connected to its bottom for protecting the external connecting segment 5. The protective shells 10 are arranged in a symmetrical array. At the bottom of the sealing layer 2, multiple elastic plates 11 are fixedly connected to the top of each protective shell 10 to provide elastic force for the fixing strip 12. The elastic plates 11 are arranged in a ring array on the top of the protective shell 10. A fixing strip 12 is fixedly connected to one side of each elastic plate 11 to fix the protective shell 10 to the bottom of the connecting ring 6. The outer wall of each elastic plate 11 is slidably connected to the inside of the sliding groove 8. The outer wall of each fixing strip 12 is slidably connected to the inside of the fixing groove 9. Multiple connecting posts 13 are fixedly connected to the top of each protective shell 10 to provide positioning for the protective shell 10 and the connecting ring 6. The outer wall of each connecting post 13 is slidably connected to the inside of the connecting hole 7.

[0037] Specifically, when the device needs to be activated, first hold the protective shell 10 with your hand and pull it down with a little force. At this time, as the protective shell 10 moves down, the inner wall of the connecting ring 6 connected to it will gradually come into contact with the fixing strip 12 and generate pressure. Under the continuous pushing force of the inner wall of the connecting ring 6, it will slowly disengage from the fixing groove 9 inside the connecting ring 6, and the originally tightly engaged state will be loosened. At the same time, the connecting post 13 at the top of the protective shell 10 will also move down synchronously and slide smoothly out from the connecting hole 7. The original plug-in fixing relationship is completely released. After this series of consecutive operations, the external connecting section 5 is completely exposed from the protective structure. The metal contacts for conductivity and the protruding buckles for positioning on its surface are clearly visible, which is ready for the subsequent precise docking with the circuit board.

[0038] Working principle: When using the aluminum electrolytic capacitor with the new lead structure, first hold the protective shell 10 and pull it downwards to make the inner wall of the connecting ring 6 squeeze the fixing strip 12 and make it come out of the fixing groove 9. At the same time, the connecting post 13 comes out of the connecting hole 7 to expose the external connecting section 5. Then fix the device on the circuit board to be used and it can be used. This device improves the connection stability and sealing by segmenting the anode terminal and the cathode terminal. The flat bending design of the external connecting section 5 increases the heat dissipation area and installation flexibility. The composite rubber sealing layer 2 effectively prevents electrolyte leakage. The silver plating on the outside of the external connecting section 5 reduces the contact resistance.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. An aluminum electrolytic capacitor with a novel lead-out structure, comprising a capacitor body (1), characterized in that: A sealing layer (2) is fixedly connected to the outer wall of the capacitor body (1), and a lead-out terminal assembly is provided at the bottom of the capacitor body (1). The lead-out terminal assembly includes an anode terminal and a cathode terminal. Both the anode terminal and the cathode terminal adopt a segmented structure, including an internal connection section (3), a sealing transition section (4), and an external connection section (5). The internal connection section (3) is welded to the internal electrode of the capacitor body (1). The sealing transition section (4) penetrates the sealing layer (2) at the bottom of the capacitor body (1). The external connection section (5) is flat and extends to both sides. The sealing layer (2) is made of composite rubber material. The surface of the external connection section (5) is plated with a silver layer.

2. The aluminum electrolytic capacitor with a novel lead-out structure according to claim 1, characterized in that: Each of the external connecting segments (5) is fixedly connected to a connecting ring (6) at its top, and each of the connecting rings (6) has multiple connecting holes (7) at its bottom.

3. An aluminum electrolytic capacitor with a novel lead-out structure according to claim 2, characterized in that: Each of the connecting rings (6) has multiple sliding grooves (8) at its bottom, and each of the connecting rings (6) has a fixing groove (9) inside its interior.

4. An aluminum electrolytic capacitor with a novel lead-out structure according to claim 3, characterized in that; The sliding grooves (8) are arranged in a ring array at the bottom of the connecting ring (6), and the fixing grooves (9) are arranged in a ring array inside the connecting ring (6).

5. An aluminum electrolytic capacitor with a novel lead-out structure according to claim 2, characterized in that: Each of the connecting rings (6) is slidably connected to a protective shell (10) at its bottom, and the protective shells (10) are arranged in a symmetrical array at the bottom of the sealing layer (2).

6. An aluminum electrolytic capacitor with a novel lead-out structure according to claim 5, characterized in that; Each of the protective shells (10) is fixedly connected to a plurality of elastic plates (11) on its top, and the elastic plates (11) are arranged in a ring array on the top of the protective shell (10).

7. An aluminum electrolytic capacitor with a novel lead-out structure according to claim 6, characterized in that: Each of the elastic plates (11) is fixedly connected to one side of a fixing strip (12), the outer wall of each elastic plate (11) is slidably connected to the inside of a sliding groove (8), and the outer wall of each fixing strip (12) is slidably connected to the inside of a fixing groove (9).

8. An aluminum electrolytic capacitor with a novel lead-out structure according to claim 5, characterized in that: Each of the protective shells (10) has a plurality of connecting posts (13) fixedly connected to its top, and the outer wall of each of the connecting posts (13) is slidably connected to the inside of the connecting hole (7).

Images