Electrolytic capacitor bolt type terminal cover plate and electrolytic capacitor

Abstract

The utility model belongs to the technical field of electrolytic capacitors, particularly relates to an electrolytic capacitor bolt-type terminal cover plate and an electrolytic capacitor, and aims to solve the problems that a bolt-type aluminum electrolytic capacitor generally has higher ESR (equivalent series resistance) and lower frequency response, so that the overall performance of the electrolytic capacitor is reduced, and the service life of the electrolytic capacitor is prolonged. According to the technical scheme, the cover plate comprises a cover plate body, two terminals used for connecting the positive electrode and the negative electrode and an anti-explosion valve used for improving the use safety are installed on the cover plate body in an embedded mode, and bolt heads used in a matched mode are fixedly arranged at the tops of the terminals. According to the utility model, the solid core cladding made of the polypyrrole material has very low equivalent series resistance and better frequency response, so that the capacitor can maintain good performance in a high-frequency circuit, and the cover plate body made of the metal copper substrate and the boron fiber reinforced material is adopted, so that the cover plate can quickly lead out internal heat, and the service life of the capacitor is prolonged. And the durability and the safety of the capacitor are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic capacitors, in particular to a bolt-type terminal cover plate of an electrolytic capacitor and an electrolytic capacitor. Background Art

[0002] Electrolytic capacitors are common electronic components used to store charge and provide filtering and smoothing functions in circuits. They usually consist of an anode, an electrolyte layer, and a cathode. There are various connection methods for the terminals of electrolytic capacitors. Among them, the bolt-type terminal is a common connection method, which allows the capacitor to be directly fixed to a circuit board or other structures through bolts and nuts. The bolt-type terminal cover plate usually refers to the protective cover covering the bolt-type terminal of the electrolytic capacitor. Its function is to protect the terminal from the influence of the external environment, such as dust, moisture, etc., and also plays a certain insulating role.

[0003] Currently, bolt-type aluminum electrolytic capacitors usually have a relatively high ESR (equivalent series resistance) and a relatively low frequency response, resulting in a decline in the overall performance of the electrolytic capacitor and being not conducive to improving its service life.

[0004] In view of the above problems, the present utility model document proposes a bolt-type terminal cover plate of an electrolytic capacitor and an electrolytic capacitor. Summary of the Utility Model

[0005] The utility model provides a bolt-type terminal cover plate of an electrolytic capacitor and an electrolytic capacitor, which solves the problem that bolt-type aluminum electrolytic capacitors in the prior art usually have a relatively high ESR (equivalent series resistance) and a relatively low frequency response, resulting in a decline in the overall performance of the electrolytic capacitor and being not conducive to improving its service life.

[0006] The utility model provides the following technical solutions:

[0007] A bolt-type terminal cover plate of an electrolytic capacitor, comprising:

[0008] A cover plate body, on which two terminals for connecting positive and negative electrodes and an explosion-proof valve for improving the use safety are embedded and installed, and a bolt head for supporting use is fixedly arranged on the top of the terminal.

[0009] In a possible design, the cover plate body is made of a metal matrix composite material, which is composed of a metal copper matrix and a boron fiber reinforced material, so that it has good thermal conductivity, high strength and stiffness.

[0010] In a possible design, a sealing rubber ring for improving airtightness is fixedly arranged on the outer wall of the terminal. The sealing rubber ring is made of polytetrafluoroethylene material, so that it has excellent chemical resistance and a low friction coefficient.

[0011] An electrolytic capacitor includes a capacitor housing, a solid core package, and the electrolytic capacitor bolt-type terminal cover plate as described above. The cover plate body is embedded and installed on the top of the capacitor housing. The solid core package is fixedly arranged at the bottom of the inner wall of the capacitor housing through a fixing agent. Both of the terminals are electrically connected to the solid core package through corresponding terminal wires.

[0012] In a possible design, the solid core package uses a conductive polymer made of polypyrrole, making it have a very low equivalent series resistance and better frequency response.

[0013] In a possible design, the fixing agent uses silicone rubber material, making it have good high-temperature resistance, electrical insulation, and aging resistance.

[0014] In a possible design, the capacitor housing uses a metal matrix composite material, which is composed of a metal aluminum matrix and a silicon carbide reinforcement material, making it have high heat dissipation performance and mechanical strength.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present utility model.

[0016] The present utility model has the following beneficial effects:

[0017] The present utility model uses a cover plate body made of a metal copper matrix and a boron fiber reinforcement material, making the cover plate not only have good thermal conductivity and be able to quickly conduct internal heat out to ensure the stable operation of the capacitor, but also have high strength and stiffness, be able to withstand large external impacts and vibrations, improve the durability and safety of the capacitor. And a sealing rubber ring made of polytetrafluoroethylene is fixedly arranged on the outer wall of the terminal, greatly improving the airtightness between the terminal and the cover plate body, effectively preventing external impurities from invading, ensuring the performance and reliability of the capacitor. At the same time, the polytetrafluoroethylene material also has good chemical resistance and low friction coefficient, and can maintain a stable sealing performance for a long time.

[0018] The solid core package of the present utility model made of polypyrrole material has a very low equivalent series resistance and better frequency response, enabling the capacitor to also maintain good performance in high-frequency circuits and meeting the requirements of modern electronic devices for high-performance capacitors; by using a fixing agent made of silicone rubber material, it not only has good high-temperature resistance, electrical insulation, and aging resistance, can ensure the long-term stable fixation of the solid core package inside the capacitor, but also is environmentally friendly and meets the environmental protection requirements; and the capacitor housing is made of a metal aluminum matrix and a silicon carbide reinforcement material, making the capacitor have high heat dissipation performance and mechanical strength, be able to operate stably in a harsh environment for a long time, and extend the service life of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the embodiment of the present utility model;

[0020] Figure 2 Schematic diagram of the internal structure of the capacitor housing of the embodiment of the present utility model;

[0021] Figure 3 Schematic diagram of the structure of the cover body of the embodiment of the present utility model;

[0022] Figure 4 Schematic diagram of the separation structure of the solid core package and the fixing agent of the embodiment of the present utility model.

[0023] Reference numerals: 1, cover body; 2, terminal; 3, bolt head; 4, sealing rubber ring; 5, explosion-proof valve; 6, capacitor housing; 7, solid core package; 8, fixing agent; 9, terminal wiring. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0025] In the description of the present utility model, it should be understood that the terms "openings", "upper", "middle", "length", "inner", etc. indicating orientations or positional relationships are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

[0026] In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed descriptions of known functions and known components are omitted in the present utility model.

[0027] Embodiment

[0028] Please refer to Figure 3 , an electrolytic capacitor bolt-type terminal cover, comprising:

[0029] A cover body 1, which is made of a metal matrix composite material, specifically a composite structure of a metal copper matrix and a boron fiber reinforced material. This material enables the cover to not only have good thermal conductivity, be able to quickly conduct internal heat out, ensure the stable operation of the capacitor, but also have high strength and stiffness, be able to withstand large external impacts and vibrations, and improve the durability and safety of the capacitor;

[0030] Two terminals 2 for connecting the positive and negative electrodes are embedded and installed on the cover body 1. Bolt heads 3 for supporting use are fixedly arranged at the tops of the two terminals 2, which facilitates connection with an external circuit. In addition, in order to enhance the airtightness between the terminal 2 and the cover body 1, a sealing rubber ring 4 is fixedly arranged on the outer wall of the terminal 2. The sealing rubber ring 4 is made of polytetrafluoroethylene, which not only has excellent chemical resistance but also has a low friction coefficient, effectively preventing external impurities from invading, ensuring the performance and reliability of the capacitor. At the same time, it can maintain a stable sealing performance for a long time;

[0031] An explosion-proof valve 5 is also arranged on the cover body 1. When the internal pressure of the capacitor is too high, the explosion-proof valve 5 will automatically open to release the internal pressure, preventing the capacitor from exploding, thereby improving the use safety of the capacitor.

[0032] Please refer to Figures 1-4 , an electrolytic capacitor, whose structure includes a capacitor housing 6, a solid core package 7, and the above-mentioned electrolytic capacitor bolt-type terminal cover plate. The capacitor housing 6 is made of a metal matrix composite material, specifically a composite structure of a metal aluminum matrix and a silicon carbide reinforcing material. This material combination enables the capacitor housing 6 to have high heat dissipation performance and mechanical strength, ensuring the stability and safety of the capacitor during operation, enabling it to operate stably for a long time in a harsh environment, and extending the service life of the capacitor;

[0033] The cover body 1 is embedded and installed at the top of the capacitor housing 6 and forms a tight connection with the capacitor housing 6. The solid core package 7 is fixedly arranged at the bottom of the inner wall of the capacitor housing 6 through a fixing agent 8. The fixing agent 8 is made of silicone rubber and has good high-temperature resistance, electrical insulation, and aging resistance, ensuring the stability and safety of the solid core package 7 inside the capacitor. Moreover, it is environmentally friendly and meets environmental protection requirements;

[0034] The solid core package 7 is made of a conductive polymer of polypyrrole. This material has a very low equivalent series resistance and better frequency response, which helps to improve the performance of the capacitor, enabling the capacitor to maintain good performance in a high-frequency circuit and meeting the requirements of modern electronic devices for high-performance capacitors. Both terminals 2 are electrically connected to the solid core package 7 through corresponding terminal wirings 9, thereby realizing the connection between the capacitor and the external circuit.

[0035] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention; without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An electrolytic capacitor bolt-type terminal cover plate, characterized in that, Comprising: A cover body (1), the cover body (1) is made of a metal matrix composite material, two terminals (2) for connecting positive and negative electrodes and an explosion-proof valve (5) for improving the use safety are embedded and installed on the cover body (1), a bolt head (3) for supporting use is fixedly arranged at the top of the terminal (2), a sealing rubber ring (4) for improving the airtightness is fixedly arranged on the outer wall of the terminal (2), and the sealing rubber ring (4) is made of polytetrafluoroethylene.

2. An electrolytic capacitor, characterized in that, Comprising a capacitor housing (6), a solid core package (7) and the electrolytic capacitor bolt-type terminal cover plate described in claim 1, the cover body (1) is embedded and installed on the top of the capacitor housing (6), the solid core package (7) is fixedly arranged at the bottom of the inner wall of the capacitor housing (6) through a fixing agent (8), and both of the two terminals (2) are electrically connected to the solid core package (7) through corresponding terminal wirings (9).

3. An electrolytic capacitor according to claim 2, characterized in that, The solid core package (7) is made of a conductive polymer of polypyrrole material.

4. An electrolytic capacitor according to claim 2, characterized in that, The fixing agent (8) is made of silicone rubber material.

5. An electrolytic capacitor according to claim 2, characterized in that, The capacitor housing (6) is made of a metal matrix composite material.

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