Aluminum electrolytic capacitor easy to dissipate heat

Abstract

The utility model provides an aluminum electrolytic capacitor of easy heat dissipation, the aluminum electrolytic capacitor includes: cover plate, aluminum shell, core cladding, electrolyte and cooling column, wherein the bottom of aluminum shell is provided with aluminum shell reinforcing rib, the cooling column contains the flowing coolant, the aluminum electrolytic capacitor provided by the utility model has higher heat dissipation efficiency, and the aluminum electrolytic capacitor has good heat dissipation performance. When excessive heat is generated in the capacitor and the temperature is too high, the excessive heat is rapidly taken away through the gas or liquid flowing in the cooling column, the temperature in the capacitor is rapidly reduced, the capacitor can be effectively prevented from being overheated, and the service life of the capacitor and related equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of aluminum electrolytic capacitors, in particular to an aluminum electrolytic capacitor which is easy to dissipate heat. Background Art

[0002] Existing threaded terminal aluminum electrolytic capacitors are generally composed of casing, aluminum shell, cover, core package, electrolyte, etc. During the use of the capacitor, a certain voltage and current need to be loaded. Since the capacitor itself inevitably has a certain resistance, part of the electrical energy will be converted into heat energy in the capacitor, causing the temperature of the capacitor itself to continue to rise. Factors such as excessive load, high working environment temperature, and aging of the capacitor's own materials can cause the capacitor to overheat.

[0003] Overheating of capacitors will accelerate the aging of the capacitor's own materials, greatly reducing the service life of the capacitor and causing the capacitor to fail quickly. The heat emitted by the capacitor will also increase the temperature of the working environment, especially for large-sized capacitors such as bolt terminal capacitors. The heat emitted can increase the temperature of a small-scale equipment chassis by dozens of degrees, seriously affecting the performance of other electronic components on the circuit board. Overheating of capacitors can even cause a large amount of electrolyte solvent to vaporize, causing a valve explosion, and damaging circuit boards and other electronic components.

[0004] There are many methods to improve the heat dissipation of capacitors, such as installing a dark-colored casing on the aluminum shell to speed up the radiation heat dissipation of the capacitor; installing a heat dissipation device next to the working circuit of the capacitor to speed up the environmental convection heat dissipation, etc. However, the above methods have low heat dissipation efficiency and the temperature of the core package inside the capacitor drops slowly, and cannot cope with the heat dissipation of large-size capacitors and high ambient temperatures. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent:

[0006] To this end, the utility model provides an aluminum electrolytic capacitor that is easy to dissipate heat. The aluminum electrolytic capacitor includes a cover plate, an aluminum shell, a core package, an electrolyte and a cooling column, wherein aluminum shell reinforcing ribs are arranged at the bottom of the aluminum shell, and a flowing coolant is contained in the cooling column.

[0007] The aluminum electrolytic capacitor provided by the utility model has high heat dissipation efficiency. When too much heat is generated inside the aluminum electrolytic capacitor and the temperature is too high, the coolant (gas or liquid) flowing in the cooling column can quickly take away the excessive heat, thereby quickly reducing the internal temperature of the aluminum electrolytic capacitor, effectively avoiding overheating of the capacitor, and extending the service life of the capacitor and related equipment.

[0008] In some embodiments of the utility model, the cooling column passes through the central gap of the core package and fixes the core package by connecting the aluminum shell reinforcement ribs.

[0009] In some embodiments of the present invention, the electrolyte is adsorbed in the core package.

[0010] In some embodiments of the present invention, the cooling column is a hollow cylinder, and a U-shaped tube is arranged inside the cooling column.

[0011] In some embodiments of the utility model, the U-shaped tube is connected to an external device to connect the flowing coolant to the aluminum electrolytic capacitor. The coolant is gas or liquid. Heat is exchanged through the flowing gas or liquid to quickly take away excess heat and quickly reduce the internal temperature of the capacitor.

[0012] In some embodiments of the present invention, the gas is any one of carbon dioxide, propane, butane, nitrogen, or a combination thereof, and the liquid is any one of pure water, glycerol, ethylene glycol, alcohol, or a combination thereof.

[0013] In some embodiments of the present invention, the cooling column is made of any one of hard aluminum alloy materials, hard glass, EPDM rubber, butyl rubber, or a combination thereof.

[0014] In some embodiments of the present invention, the materials of the U-shaped tube and the cooling column may be the same or different.

[0015] In some embodiments of the present invention, the aluminum shell reinforcement rib is a solid cylinder.

[0016] In some embodiments of the present invention, the aluminum shell reinforcement rib is in contact with the cooling column, and a cylindrical groove is provided on the contact surface.

[0017] In some embodiments of the present invention, the diameter of the cylindrical groove is larger than the diameter of the cooling column.

[0018] In some embodiments of the present invention, elastic rubber is arranged in the cylindrical groove.

[0019] In some embodiments of the present invention, the elastic rubber is any one of butyl rubber, silicone rubber, polyurethane rubber or a combination thereof.

[0020] In the utility model, after the cooling column is inserted into the elastic rubber in the cylindrical groove, it is fixed by the resilience of the elastic rubber.

[0021] In some embodiments of the utility model, cooling column holes are provided on the cover plate, the cooling columns pass through the cooling column holes, and sealing materials are used to seal the gaps in the cover plate to ensure the sealing of the cover plate.

[0022] In some embodiments of the present invention, the sealing material is epoxy resin glue.

[0023] In some embodiments of the present invention, the cooling column has a protruding portion above the cover plate, and the protruding portion is coated with insulating material.

[0024] In some embodiments of the present invention, the insulating material is epoxy resin, PET sleeve, PVC sleeve, etc., to prevent the cooling column from being too close to the terminal and causing a short circuit in the capacitor.

[0025] The beneficial effects of the utility model are:

[0026] The aluminum electrolytic capacitor provided by the utility model is provided with a cooling column and aluminum shell reinforcement ribs of matching size. When the capacitor is working, due to the resistance of the capacitor itself, part of the electrical energy is converted into heat energy, the temperature inside the core package continues to rise, and the heat is transferred to the cooling column arranged in the aluminum electrolytic capacitor. The liquid or gas in the cooling column quickly absorbs the heat, and the heat is taken away from the inside of the capacitor through the continuously flowing liquid or gas. The aluminum electrolytic capacitor provided by the utility model, which is easy to dissipate heat, has a high heat dissipation efficiency. When the heat generated inside the capacitor is too much and the temperature is too high, the internal temperature of the capacitor can be quickly reduced, effectively avoiding overheating of the capacitor, and extending the service life of the capacitor and its related equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the aluminum electrolytic capacitor provided by the utility model;

[0028] Figure 2 A top view of the overall structure of the aluminum electrolytic capacitor provided by the utility model;

[0029] Figure 3 A schematic diagram of the back side of the aluminum electrolytic capacitor cover provided by the utility model;

[0030] Figure 4 This is a schematic diagram of the interior of the cooling column of the aluminum electrolytic capacitor provided by the utility model;

[0031] Figure 5 This is a schematic diagram of the exterior of the cooling column of the aluminum electrolytic capacitor provided by the utility model;

[0032] Figure 6 A schematic diagram of the bottom reinforcement ribs of the aluminum shell of the aluminum electrolytic capacitor provided by the utility model;

[0033] The numbers in the figure are: 10-terminal, 20-cover, 30-aluminum shell, 40-core package, 50-cooling column, 60-aluminum shell reinforcement rib, 70-cover reinforcement rib, 80-sealing rubber, 90-epoxy resin glue, 100-explosion-proof valve, 110-explosion-proof valve hole, 51-U-type tube, 52-elastic rubber, 53-insulating material. DETAILED DESCRIPTION

[0034] The following description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Unless expressly stated to the contrary, all ranges cited herein are inclusive.

[0038] The term "at least one" used in the present invention is used to describe the elements and components described in the present invention. This is done only for convenience and to provide a general meaning to the scope of the present invention. This description should be understood to include one or at least one, and the singular also includes the plural, unless it is obvious that it means otherwise.

[0039] Unless otherwise defined, the meaning of all scientific and technological terms used in the present invention is the same as that commonly understood by those of ordinary skill in the field to which the present invention belongs. Although methods and materials similar or equivalent to the methods and materials described in the present invention can also be used in the implementation or testing of the present invention, suitable methods and materials are described below. All publications, patent applications, patents and other references mentioned in the present invention are incorporated into the present invention by reference in their entirety, unless specific paragraphs are cited. If a conflict occurs, this specification and the definitions included therein shall prevail. In addition, materials, methods and embodiments are merely illustrative and are not intended to be limiting.

[0040] Example 1

[0041] like Figure 1-6As shown, the utility model provides an aluminum electrolytic capacitor that is easy to dissipate heat, wherein a cooling column 50 passes through a cooling column hole on a cover plate 20. To ensure the sealing of the cover plate 20, an epoxy resin glue 90 is used to seal the gap of the cover plate; the cooling column 50 passes through the central gap of the core package 40, and the core package 40 is fixed by connecting the aluminum shell reinforcement rib 60 and the cover plate reinforcement rib 70, and the electrolyte is adsorbed in the core package; the cooling column 50 has a protruding portion above the cover plate 20, and a terminal 10 is provided on the cover plate 20. To prevent the cooling column 50 from being too close to the terminal 10 and causing the capacitor to In case of short circuit, the protruding part is coated with insulating material 53; the cooling column 50 is a hollow cylinder, and a U-shaped tube 51 is arranged inside the cooling column 50, and the U-shaped tube 51 is connected to an external device to connect the flowing gas or liquid to the aluminum electrolytic capacitor; the aluminum shell reinforcement rib 60 is a solid cylinder, and a cylindrical groove is arranged on the contact surface with the cooling column 50, and the diameter of the cylindrical groove is larger than the diameter of the cooling column 50; the cylindrical groove is filled with anti-corrosion elastic rubber 52; when the cooling column 50 is inserted into the elastic rubber 52 in the cylindrical groove, it is fixed by the resilience of the elastic rubber 52.

[0042] When the capacitor is working, due to the resistance of the capacitor itself, part of the electrical energy is converted into heat energy, the temperature inside the core package 40 continues to rise, and the heat is transferred to the cooling column 50 set in the capacitor. The liquid or gas in the cooling column 50 quickly absorbs the heat and takes the heat away from the inside of the capacitor through the continuously flowing liquid or gas. The aluminum electrolytic capacitor provided by the utility model has a high heat dissipation efficiency. When the heat generated inside the capacitor is too much and the temperature is too high, the internal temperature of the capacitor can be quickly reduced, the capacitor can be effectively prevented from overheating, and the service life of the capacitor and its related equipment can be extended.

[0043] Comparative Example 1

[0044] An aluminum electrolytic capacitor, which differs from the first embodiment in that no cooling column is provided.

[0045] When the capacitor is working, due to the resistance of the capacitor itself, part of the electrical energy is converted into heat energy, the temperature inside the core package continues to rise, and the temperature of the capacitor itself continues to rise, causing the capacitor to overheat. Due to the lack of cooling columns, the heat in the capacitor cannot be quickly and effectively dissipated. Overheating of the capacitor will accelerate the aging rate of the capacitor's own materials, greatly reducing the service life of the capacitor and causing the capacitor to fail quickly. The heat dissipated by the capacitor will also increase the temperature of the working environment, especially large-sized capacitors such as bolt terminal capacitors. The heat dissipated can increase the temperature of a small range of equipment chassis by dozens of degrees, seriously affecting the performance of other electronic components on the circuit board. Overheating of the capacitor may even cause a large amount of vaporization of the electrolyte solvent, causing a valve explosion, and damaging the circuit board and other electronic components.

[0046] In summary, the aluminum electrolytic capacitor provided by the utility model has a high heat dissipation efficiency. When too much heat is generated inside the capacitor and the temperature is too high, the internal temperature of the capacitor can be quickly reduced, effectively avoiding overheating of the capacitor and extending the service life of the capacitor and related equipment.

[0047] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An aluminum electrolytic capacitor that is easy to dissipate heat, characterized in that: The aluminum electrolytic capacitor comprises a cover plate, an aluminum shell, a core package, an electrolyte and a cooling column, wherein an aluminum shell reinforcing rib is provided at the bottom of the aluminum shell, and a flowing coolant is contained in the cooling column; The cooling column passes through the central gap of the core package and fixes the core package by connecting the aluminum shell reinforcement ribs; The cooling column is a hollow cylinder, and a U-shaped tube is arranged inside the cooling column; The U-shaped tube is connected to an external device to connect the flowing coolant to the aluminum electrolytic capacitor; The aluminum shell reinforcement rib is a solid cylinder; The aluminum shell reinforcement rib is in contact with the cooling column, and a cylindrical groove is provided on the contact surface; The diameter of the cylindrical groove is larger than the diameter of the cooling column; An elastic rubber is arranged in the cylindrical groove; The cover plate is provided with cooling column holes, the cooling columns pass through the cooling column holes and a sealing material is used to seal the gap of the cover plate to ensure the sealing of the cover plate; The cooling column has a protruding portion above the cover plate, and the protruding portion is coated with insulating material; The electrolyte is adsorbed in the core bag.

Images