Stable aluminum electrolytic capacitor

Abstract

The utility model discloses a stable aluminum electrolytic capacitor, which comprises a metal shell, a core bag, a packaging metal cover plate and a stable firmware, wherein one end of the metal shell is provided with an opening; the packaging metal cover plate comprises a cover plate main body and a terminal assembly arranged on the cover plate main body; the cover plate body comprises a circular plane and a circular ring belt which is arranged on the periphery of the circular plane and extends perpendicular to the circular plane. The stabilizing fixing piece comprises a circular fixing body, a plurality of stop pieces bent inwards along the periphery of the circular fixing body, and a plurality of fixing inserting pieces extending upwards along the periphery of the circular fixing body and perpendicular to the stop pieces. The annular fixing body is used for being connected to an opening of a metal shell in a sleeving mode so as to hoop the metal shell. The fixing plug-in is used for being plugged on a circuit board so as to install and fix the aluminum electrolytic capacitor on the circuit board. The stable aluminum electrolytic capacitor can be stably fixed on a circuit board, and the stability of the aluminum electrolytic capacitor is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitors, and in particular relates to a stable aluminum electrolytic capacitor. Background Art

[0002] The basic function of capacitors is charging and discharging. With the continuous improvement of capacitor performance, aluminum electrolytic capacitors have been widely used in consumer electronics, communication products, computers and peripheral products, new energy, automation control, automotive industry, optoelectronic products, high-speed railways, aviation and military equipment, etc. In the field of consumer electronics technology, the application of aluminum electrolytic capacitors has been expanding in many emerging fields such as energy-saving lamps, inverters, new energy, etc., with the structural transformation and technological progress. It has the characteristics of small size, large storage capacity and high cost performance.

[0003] At present, aluminum electrolytic capacitors are generally composed of a core package consisting of positive and negative aluminum foils and electrolytic paper windings, a cylindrical shell, and a sealing cover plate with positive and negative terminal terminals. The cover plate is provided with positive and negative terminal lead-out holes, and the positive and negative terminals are installed on the cover plate through through holes. For upright mounted electrolytic capacitors, the positive and negative terminals on the cover plate are generally welded to the circuit board, so that the aluminum electrolytic capacitor is installed and fixed on the circuit board as a whole. However, this type of aluminum electrolytic capacitor cover plate is only suitable for small volumes and relatively stable application environments. For large-volume aluminum electrolytic capacitors or for use in complex environments with shaking or vibration, it is difficult to stably fix the aluminum electrolytic capacitor only by welding the positive and negative terminals on the cover plate to the circuit board.

[0004] It can be seen that, with respect to the above-mentioned current existing technologies, it is necessary to conduct research and development to provide a solution that can stably fix the aluminum electrolytic capacitor on the circuit board and enhance the stability of the aluminum electrolytic capacitor.

[0005] The disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content

[0006] The utility model aims to provide a stable aluminum electrolytic capacitor to solve at least one of the above-mentioned background technical problems.

[0007] To achieve the above purpose, the technical solution of the embodiment of the utility model is implemented as follows:

[0008] A stable aluminum electrolytic capacitor comprises a metal shell, a core package encapsulated in the metal shell, an encapsulating metal cover plate for encapsulating the core package in the metal shell, and a stabilizing fixture; wherein, an opening is provided at one end of the metal shell; the encapsulating metal cover plate comprises a cover plate body and a terminal assembly arranged on the cover plate body; the cover plate body comprises a circular plane, and a circular ring belt arranged at the periphery of the circular plane and extending perpendicularly to the circular plane; the stabilizing fixture comprises a circular ring-shaped fixing body, a plurality of stopper sheets bent inwardly along the periphery of the circular ring-shaped fixing body, and a plurality of fixing plug-ins extending upwardly along the periphery of the circular ring-shaped fixing body and perpendicularly to the stopper sheets; the circular ring-shaped fixing body is used to be sleeved on the opening of the metal shell to tighten the metal shell; the fixing plug-in is used to be plugged into a circuit board to install and fix the aluminum electrolytic capacitor on the circuit board.

[0009] In some embodiments, the inner diameter of the annular fixing body is equal to the outer diameter of the metal shell.

[0010] In some embodiments, the annular fixing body is welded to the outer wall of the metal shell of the aluminum electrolytic capacitor through its inner wall.

[0011] In some embodiments, the stopper is annular and is integrally connected to the annular fixing body.

[0012] In some embodiments, both surfaces of the stopper are planes, the inner surface of the stopper abuts against the periphery of the opening of the metal shell, and the outer surface is attached to the surface of the circuit board on which the aluminum electrolytic capacitor is installed.

[0013] In some embodiments, the fixing plug-in is disposed between two adjacent stop pieces, and the number of the fixing plug-in is equal to the number of the stop pieces.

[0014] In some embodiments, the thickness of the stopper sheet is less than or equal to the thickness of the annular fixing body.

[0015] In some embodiments, the plurality of stop plates are arranged at equal intervals and form a circular hole that is concentric with the opening of the metal shell.

[0016] In some embodiments, the package metal cover plate further includes an insulating gasket, which is installed between the metal cover plate body and the terminal assembly to insulate the terminal assembly from the cover plate body.

[0017] In some embodiments, a terminal assembly mounting hole is provided on the circular plane, and a circular hole is provided on the insulating gasket corresponding to the terminal assembly mounting hole.

[0018] The beneficial effects of the technical solution of the utility model are:

[0019] Compared with the prior art, the stable aluminum electrolytic capacitor of the utility model can be stably fixed on the circuit board, thereby enhancing the stability of the aluminum electrolytic capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a three-dimensional structural diagram of a stable aluminum electrolytic capacitor according to an embodiment of the utility model;

[0022] Figure 2 It is a partially exploded schematic diagram of a stable aluminum electrolytic capacitor according to one embodiment of the utility model;

[0023] Figure 3 It is an exploded schematic diagram of a stable aluminum electrolytic capacitor according to one embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of a stable firmware of a stable aluminum electrolytic capacitor according to an embodiment of the utility model;

[0025] Figure 5 is a partially exploded schematic diagram of a stable aluminum electrolytic capacitor according to another embodiment of the utility model;

[0026] Figure 6 It is a three-dimensional schematic diagram of a stable aluminum electrolytic capacitor of another embodiment of the utility model;

[0027] Figure 7 It is a schematic diagram of the exploded view of the terminal assembly of a stable aluminum electrolytic capacitor according to another embodiment of the utility model. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the utility model clearer and more understandable, and to enable people in the technical field to better understand the solutions of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for fixing or for circuit connection.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, unless otherwise clearly specified and defined, the meaning of "multiple" is two or more, and the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0032] Reference Figure 1-Figure 4 , Figure 7As shown, as an embodiment of the utility model, a stable aluminum electrolytic capacitor 100 is provided, comprising a metal shell 10, a core package 11 encapsulated in the metal shell 10, an encapsulating metal cover plate 300 for encapsulating the core package 11 in the metal shell 10, and a stabilizing fixture 200; wherein, an opening is provided at one end of the metal shell 10; a first waist 101 and a second waist 102 are respectively provided around the metal shell near the middle position of the metal shell 10 and one end close to the opening; the encapsulating metal The cover plate 300 includes a disc-shaped cover plate body 30 and a terminal assembly 400 disposed on the cover plate body 30; the cover plate body 30 includes a circular plane 301 and a circular ring belt 302 extending at the periphery of the circular plane and perpendicular to the circular plane; the stabilizing fixture 200 includes a circular ring-shaped fixing body 20, a plurality of stopper sheets 22 bent inward along the periphery of the circular ring-shaped fixing body 20, and a plurality of fixing plug-ins 21 extending upward along the periphery of the circular ring-shaped fixing body 20 and perpendicular to the stopper sheets 22. The plurality of fixing plug-ins 21 and the circular fixing body 20 are located on the same cylindrical surface. The circular ring-shaped fixing body 20 is used to be sleeved on the opening of the metal shell of the aluminum electrolytic capacitor to tighten the metal shell 10; the fixing plug-in 21 is used to be plugged into the circuit board to install and fix the aluminum electrolytic capacitor 100 on the circuit board. The stopper 22 is used to abut against the surface of the package metal cover of the aluminum electrolytic capacitor or the periphery of the opening of the metal shell of the aluminum electrolytic capacitor.

[0033] Please refer to Figure 1 , Figure 2 As shown, in some embodiments, the inner diameter of the annular fixed body 20 is equal to the outer diameter of the metal shell 10, so that the annular fixed body 20 and the metal shell 10 are closely matched. In some embodiments, the annular fixed body 20 is welded to the outer wall of the metal shell 10 of the aluminum electrolytic capacitor through its inner wall, so as to be firmly connected to the metal shell 10. It should be noted that, in some embodiments, the annular fixed body 20 can also be fixed to the metal shell 10 by stamping the annular fixed body 20 or taking other methods.

[0034] Please refer to Figure 2 , Figure 3As shown, in some embodiments, the stopper 22 is annular, and the stopper 22 is integrally connected to the annular fixed body 20. Both surfaces of the stopper 22 are planes, and its inner surface is attached to the surface of the metal cover of the aluminum electrolytic capacitor, and the outer surface is attached to the surface of the circuit board on which the aluminum electrolytic capacitor is installed. In some embodiments, the inner surface of the stopper 22 abuts the periphery of the opening of the metal shell of the aluminum electrolytic capacitor. In some embodiments, the plurality of stopper sheets 22 are arranged at equal intervals, and the plurality of stopper sheets 22 surround a circular hole that is concentric with the opening of the metal shell of the aluminum electrolytic capacitor, so that the terminals on the packaged metal cover of the aluminum electrolytic capacitor extend from the circular hole. In an embodiment of the utility model, the lengths of the plurality of stopper sheets 22 are equal; the number of the stopper sheets 22 is three, and the three stopper sheets are arranged at equal intervals.

[0035] In some embodiments, the fixing plug-in 21 is disposed between two adjacent stopper sheets 22, and the number of the fixing plug-in 21 is equal to the number of the stopper sheets 22. In the embodiment of the utility model, the number of the fixing plug-in 21 is three, and the three fixing plug-ins 21 are connected to form an equilateral triangle.

[0036] In some embodiments, the end of the fixing plug-in 21 is on the same horizontal plane as the end of the lead terminal on the metal cover plate 300 of the aluminum electrolytic capacitor package, so that the fixing plug-in 21 is fixed to the circuit board to stably connect and fix the metal cover plate to the circuit board, thereby installing and fixing the aluminum electrolytic capacitor on the circuit board.

[0037] In the embodiment of the utility model, the thickness of the stopper sheet 22 is equal to the thickness of the annular fixing body 20; it should be noted that in some other embodiments, the thickness of the stopper sheet 22 is less than or equal to the thickness of the annular fixing body 20. Similarly, the thickness of the fixing plug 21 is equal to the thickness of the annular fixing body 20, or less than the thickness of the annular fixing body 20.

[0038] In some embodiments, the width of the fixing plug 21 is less than or equal to the interval between two adjacent stop pieces 22 .

[0039] In some embodiments, the metal shell 10 is provided with an opening at one end and is closed at the other end, thereby forming a receiving space with an opening at one end; the core package 11 is provided with a high-temperature electronic tape 110 at the middle position corresponding to the first waist 101 of the metal shell 10; the circular ring belt 302 and the circular plane 301 are combined to form a circular disk shape with a concave bottom; the metal cover plate 300 is encapsulated in the opening position of the metal shell 10 by placing the circular ring belt 302 of the cover plate body 30 facing away from the core package 11.

[0040] The packaged metal cover plate 300 also includes an insulating gasket (not shown), which is installed between the metal cover plate body 30 and the terminal assembly 400 to insulate the terminal assembly 400 from the metal cover plate body 30. The annular belt 302 and the circular plane 301 are combined to form a disc shape with a concave bottom; the packaged metal cover plate 300 is packaged in the opening position of the capacitor metal shell by placing the annular belt 302 of the cover plate body 30 toward the core package or away from the core package. In some embodiments, the connection between the annular belt 301 and the circular plane is set to be an arc-shaped transition.

[0041] Please refer to Figure 2-Figure 6 As shown, in some embodiments, the height of the annular fixing body 20 is less than or equal to the height of the annular belt 302; the thickness of the annular fixing body 20 is greater than or equal to the thickness of the annular belt 302. In some embodiments, a plurality of fixing plug-ins 21 are equidistantly arranged on the annular fixing body 20. In the embodiment of the utility model, there are three fixing plug-ins 21, and the connecting line of the three fixing plug-ins 21 forms an equilateral triangle.

[0042] The circular plane 301 is provided with a terminal assembly mounting hole 303, and the insulating gasket is provided with a circular hole corresponding to the terminal assembly mounting hole; the terminal assembly 400 includes a lead-out metal guide pin 40, and the lead-out metal guide pin 40 includes a connection end 401 connected to an external device, an aluminum stem 402, and a welding end 403 connected to the core package. The packaged metal cover plate 300 is laser welded by the outer surface of the circular ring band 302 of the cover plate body 30 to the inner surface of the shell of the electrolytic capacitor to encapsulate the packaged metal cover plate 300 at the opening of the metal shell, and then encapsulate the core package in the metal shell. In some embodiments, the end of the fixed plug-in is on the same horizontal plane as the end of the lead-out metal guide pin 40.

[0043] Specifically, when the annular band 302 of the cover body 30 is facing away from the core package, the connection end of the lead-out metal guide pin 40 extends outward from the recessed side of the metal cover, the surface of the metal cover is recessed, and the end of the lead-out metal guide pin 40 on the metal cover is on the same horizontal plane as the end of the fixed pin, so that it is fixed to the circuit board through the fixed pin to stably connect and fix the metal cover to the circuit board, and then the aluminum electrolytic capacitor is installed and fixed on the circuit board, reducing the force on the lead-out metal guide pin and reducing damage to the lead-out metal guide pin.

[0044] Reference Figure 5 , Figure 6As shown, when the annular band 302 of the cover body 30 faces the core package packaging, the welding end 403 of the lead-out metal guide pin 40 faces the circular aluminum shell to be welded to the lead-out electrode on the core package, the metal cover surface of the aluminum electrolytic capacitor is flat, and the inner surface of the stopper 22 of the stabilizing fixture 200 is attached to the cover surface; and when the annular band 302 of the cover body 30 is facing away from the core package packaging, the connecting end of the lead-out metal guide pin 40 extends outward from the recessed side of the cover, the metal cover surface of the aluminum electrolytic capacitor is recessed, and a gap is formed between the stopper 22 of the stabilizing fixture 200 and the cover surface, and the stopper 22 abuts against the peripheral edge of the opening of the metal shell of the aluminum electrolytic capacitor.

[0045] Reference Figure 3 , Figure 4 As shown, in some embodiments, the high-temperature electronic tape 110 of the core package is set to a width greater than 12 mm, and the high temperature resistance is greater than or equal to 200°C. In some embodiments, the spacing between the first waist 101 and the second waist 102 is greater than or equal to the distance between the first waist 101 and the bottom plane of the metal shell. In some embodiments, the height of the annular fixed body 20 is less than or equal to the distance between the second waist 102 and the opening of the metal shell. The inner diameter of the annular fixed body 20 is equal to the outer diameter of the metal shell 10 of the aluminum electrolytic capacitor, so that the inner wall of the annular fixed body 20 is close to the surface of the metal shell 10 of the aluminum electrolytic capacitor, tightly clamping the metal shell 10.

[0046] The second waist 102 of the metal shell forms a circle of protrusions 103 on the inner surface of the metal shell, and the circular plane of the cover body 30 abuts against the protrusions 103, so that the top surface of the aluminum electrolytic capacitor is concave. Through the laser welding packaging of the metal cover, the closing position area of ​​the aluminum electrolytic capacitor packaging structure is reduced by more than 90%, and through the application of the metal cover, the metal area of ​​the aluminum electrolytic capacitor is increased to more than 95%, further improving the safety factor of the product.

[0047] Please refer to Figure 7 As shown, the terminal assembly 400 also includes an insulating rubber seat 41 and a metal sleeve 42; the welding end 403 of the lead-out metal guide pin 40 faces the inside of the shell to be welded to the lead-out electrode on the core package, and the lead-out connection end 401 extends outward from the concave side of the cover plate. Specifically, the lead-out metal guide pin 40 is higher than the surface of the annular belt of the cover plate body.

[0048] In some embodiments, the insulating rubber seat 41 is arranged between the lead-out metal guide pin 40 and the metal sleeve 42, and the metal sleeve 42 is welded to the terminal assembly mounting hole, so that the terminal assembly 400 is mounted and fixed on the cover plate body 30. The outer diameter of the metal sleeve 42 is adapted to the terminal assembly mounting hole; the insulating rubber seat 41 of the terminal assembly includes a cylindrical sleeve 410 and a circular bottom plate 411, and the outer diameter of the circular bottom plate 411 is larger than the aperture of the terminal assembly mounting hole. The insulating rubber seat 41 is arranged between the lead-out metal guide pin 40 and the metal sleeve 42, so that the lead-out metal guide pin 40 and the metal sleeve 42 are insulated. The insulating rubber seat 41 includes a cylindrical sleeve 410 and a circular bottom plate 411. A through hole 412 is provided at the center of the insulating rubber seat 41 to match the aluminum stem 402 for leading out the metal guide pin. The outer diameter of the aluminum stem 402 is adapted to the inner diameter of the through hole 412, so that the aluminum stem 402 can be tightly sleeved inside the through hole 412.

[0049] Reference Figure 7 As shown, in some embodiments, a welding end 403 of the lead-out metal guide pin 40 connected to the core package is provided with a circular protrusion 404 on the upper surface, and an annular groove 405 is formed between the circular protrusion 404 and the bottom of the aluminum stem; such a design allows the metal sleeve 42 to squeeze the insulating rubber seat 41 when the waist is tightened, and the circular bottom plate 411 of the insulating rubber seat 41 is partially squeezed and embedded in the annular groove 405, and at the same time, the circular protrusion 404 is squeezed and embedded in the circular bottom plate 411 of the insulating rubber seat 41, so that the insulating rubber seat 41 and the lead-out metal guide pin 40 are tightly combined together.

[0050] It is understandable that, in some embodiments, the lead-out metal guide needle 40 may also be a strip of other irregular shapes, which is not particularly limited in this embodiment. No matter what shape it is, as long as it does not deviate from the main purpose of this application, it should fall within the protection scope of this application.

[0051] In some embodiments, the first beam waist 101 and the second beam waist 102 form an annular groove on the outer surface of the metal shell, respectively, and the annular groove forms an annular protrusion corresponding to the inner wall of the metal shell, and the height of the protrusion is substantially equal to the depth of the annular groove. In some embodiments, the groove opening width of the annular groove is greater than the depth of the groove.

[0052] In some embodiments, the bottom surface of the metal shell is provided with a plurality of spokes (not shown), and the plurality of spokes extend radially toward the inner wall of the shell with the center circle of the bottom surface as the center. In some embodiments, the spokes are in the shape of square strips, one end of the spokes extends to connect to the inner wall of the shell, and the other end connects to the edge of the center circle of the bottom surface, and the end of the spoke connected to the center circle of the bottom surface is wedge-shaped. In some embodiments, the spokes are perpendicular to the bottom surface of the shell and the inner wall of the shell.

[0053] In some embodiments, a small notch-type explosion-proof structure (not shown) is provided in the central circle of the bottom surface. In an embodiment of the utility model, the explosion-proof structure is a cross-shaped notch.

[0054] In the embodiment of the utility model, the shell is cylindrical, and the cylindrical core package is placed in the metal shell. The protrusions formed by the first and second waists inside the shell squeeze and fix the core package, thereby fixing the core package in the metal shell. At the same time, the multiple spokes at the bottom of the receiving space squeeze the bottom of the core package, effectively increasing the friction constraint with the bottom of the core package, thereby stably fixing the core package in the receiving space of the metal shell.

[0055] In some embodiments, a current collector (not shown) is led out from the core package 11, and an insulator is provided between the core package 11 and the metal cover plate 300 to prevent the current collector from contacting and conducting with the metal cover plate 300. Specifically, the core package 11 includes a current collector, electrolytic paper (unnumbered), cathode foil (unnumbered), and anode foil (unnumbered), wherein an electrolytic paper layer is provided in the innermost layer of the core package 11 and between the cathode foil and the anode foil; the current collector includes an anode current collector and a cathode current collector; specifically, a negative electrode current collector is led out from the cathode foil, and a positive electrode current collector is led out from the anode foil; as an embodiment of the present invention, the arrangement order of the electrolytic paper, cathode foil, and anode foil is electrolytic paper, cathode foil, electrolytic paper, and anode foil.

[0056] It is understandable that the above content is a further detailed description of the invention of the utility model in combination with specific / preferred implementation methods, and it cannot be determined that the specific implementation of the invention of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the invention of the utility model belongs, without departing from the concept of the invention of the utility model, they can also make several substitutions or modifications to these described implementation methods, and these substitutions or modifications should be deemed to belong to the scope of protection of this patent. In the description of this specification, the description of reference terms such as "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model.

[0057] In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other. Although the embodiments and advantages of the utility model have been described in detail, it should be understood that various changes, substitutions and modifications may be made herein without departing from the scope defined by the appended claims.

[0058] In addition, the scope of the invention is not intended to be limited to the specific embodiments of the processes, machines, manufactures, material compositions, means, methods, and steps described in the specification. It will be readily understood by those skilled in the art that the above disclosures, processes, machines, manufactures, material compositions, means, methods, or steps currently existing or to be developed later that perform substantially the same functions as the corresponding embodiments described herein or obtain substantially the same results as the embodiments described herein may be utilized. Therefore, the appended claims are intended to include these processes, machines, manufactures, material compositions, means, methods, or steps within their scope.

Claims

1. A stable aluminum electrolytic capacitor, characterized in that: It includes a metal shell, a core package encapsulated in the metal shell, an encapsulating metal cover plate for encapsulating the core package in the metal shell, and a stabilizing fixture; wherein, an opening is provided at one end of the metal shell; the encapsulating metal cover plate includes a cover plate body and a terminal assembly arranged on the cover plate body; the cover plate body includes a circular plane, a circular ring belt arranged at the periphery of the circular plane and extending perpendicular to the circular plane; the stabilizing fixture includes a circular ring-shaped fixing body, a plurality of stopper plates bent inwardly along the periphery of the circular ring-shaped fixing body, and a plurality of fixing plug-ins extending upward along the periphery of the circular ring-shaped fixing body and perpendicular to the stopper plates; the circular ring-shaped fixing body is used to be sleeved on the opening of the metal shell to tighten the metal shell; the fixing plug-in is used to be plugged into a circuit board to install and fix the aluminum electrolytic capacitor to the circuit board.

2. The stable aluminum electrolytic capacitor according to claim 1, characterized in that: The inner diameter of the annular fixing body is equal to the outer diameter of the metal shell.

3. The stable aluminum electrolytic capacitor according to claim 1, characterized in that: The annular fixing body is welded to the outer wall of the metal shell of the aluminum electrolytic capacitor through the inner wall thereof.

4. The stable aluminum electrolytic capacitor according to claim 1, characterized in that: The stopper piece is annular and is integrally connected to the annular fixing body.

5. The stable aluminum electrolytic capacitor according to claim 1, characterized in that: Both surfaces of the stopper sheet are planes, the inner surface of the stopper sheet abuts against the periphery of the opening of the metal shell, and the outer surface is attached to the surface of the circuit board on which the aluminum electrolytic capacitor is installed.

6. The stable aluminum electrolytic capacitor according to claim 1, characterized in that: The fixing plug-in is arranged between two adjacent stop pieces, and the number of the fixing plug-in is equal to the number of the stop pieces.

7. The stable aluminum electrolytic capacitor according to claim 1, characterized in that: The thickness of the stopper sheet is less than or equal to the thickness of the annular fixing body.

8. The stable aluminum electrolytic capacitor according to claim 1, characterized in that: A plurality of stop plates are arranged at equal intervals and surround a circular hole which is concentric with the opening of the metal shell.

9. The stable aluminum electrolytic capacitor according to claim 8, characterized in that: The packaged metal cover plate also includes an insulating gasket, which is installed between the metal cover plate body and the terminal assembly to insulate the terminal assembly from the cover plate body.

10. The stable aluminum electrolytic capacitor according to claim 9, characterized in that: A terminal assembly mounting hole is arranged on the circular plane, and a circular hole is arranged on the insulating gasket corresponding to the terminal assembly mounting hole.

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