Cover plate assembly of aluminum electrolytic capacitor

Abstract

The utility model discloses a cover plate assembly of an aluminum electrolytic capacitor. The cover plate assembly comprises a metal packaging cover plate and a fixing piece installed on the metal packaging cover plate. Wherein the metal packaging cover plate comprises a disc-shaped 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 fixing piece comprises an annular fixing body matched with the circular ring belt and a plurality of fixing inserting pieces extending on the annular fixing body. And the plurality of fixing plug-ins and the annular fixing main body are positioned on the same cylindrical surface. According to the cover plate assembly of the aluminum electrolytic capacitor, the cover plate can be stably installed and fixed through the fixing piece, so that the aluminum electrolytic capacitor is further stably fixed on the circuit board.

Description

Technical Field

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

[0002] The basic function of a capacitor 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.

[0003] At present, aluminum electrolytic capacitors are generally composed of a core package consisting of positive and negative aluminum foil and electrolytic paper winding, a cylindrical aluminum 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 aluminum electrolytic capacitors, in addition to being used to encapsulate the core package in the aluminum shell, the cover plate also has an important function of fixing the aluminum electrolytic capacitor. The positive and negative terminals on the cover plate are welded to the circuit board, so that the aluminum electrolytic capacitor is fixed on the circuit board as a whole. However, this 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 by welding the positive and negative terminals to the circuit board.

[0004] It can be seen that, with respect to the above-mentioned current prior art, it is necessary to conduct research and development to provide a solution, to provide an aluminum electrolytic capacitor cover assembly, which can stably install and fix the capacitor cover, thereby further stably fixing the aluminum electrolytic capacitor on the circuit board, and ensuring that the positive and negative terminals of the cover are not damaged.

[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 an aluminum electrolytic capacitor cover plate assembly 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 cover plate assembly of an aluminum electrolytic capacitor includes a metal packaging cover plate and a fixing piece installed on the metal packaging cover plate; wherein the metal packaging cover plate includes a disc-shaped cover plate body and a terminal assembly arranged on the cover plate body; the cover plate body includes a circular plane and a circular ring belt arranged on the periphery of the circular plane and extending perpendicular to the circular plane; the fixing piece includes an annular fixing body matched with the circular ring belt and a plurality of fixing plug-ins extending on the annular fixing body; the plurality of fixing plug-ins and the annular fixing body are on the same cylindrical surface.

[0009] In some embodiments, a reinforcement portion is provided on the annular fixing body of the fixing member, and the fixing plug-in is provided at the position of the reinforcement portion.

[0010] In some embodiments, the height of the annular fixing body is less than or equal to the height of the annular belt.

[0011] In some embodiments, the annular fixing body is fixed to the inner wall of the circular ring band by laser welding.

[0012] In some embodiments, the thickness of the annular fixing body is greater than or equal to the thickness of the annular band.

[0013] In some embodiments, the plurality of fixing plug-ins are equidistantly spaced on the annular fixing body.

[0014] In some embodiments, there are three fixing plug-ins, and the connecting line of the three fixing plug-ins forms an equilateral triangle.

[0015] In some embodiments, the terminal assembly includes a lead-out metal guide pin, and the ends of the plurality of fixing plug-ins are on the same horizontal plane as the ends of the lead-out metal guide pin.

[0016] In some embodiments, the metal packaging cover plate is encapsulated in the opening of the aluminum shell by laser welding the outer surface of the annular band of the cover plate body to the inner surface of the aluminum shell of the electrolytic capacitor.

[0017] In some embodiments, an insulating gasket is also included, and the insulating gasket is installed between the cover plate body and the terminal assembly to insulate the terminal assembly from the cover plate body.

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

[0019] Compared with the prior art, the aluminum electrolytic capacitor cover plate assembly of the utility model can stably install and fix the cover plate through the fixing piece, thereby further stably fixing the aluminum electrolytic capacitor on the circuit board. 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 an aluminum electrolytic capacitor cover plate assembly according to an embodiment of the utility model;

[0022] Figure 2 This is a three-dimensional view from another angle of an aluminum electrolytic capacitor cover assembly according to an embodiment of the utility model;

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

[0024] Figure 4 It is another exploded schematic diagram of an aluminum electrolytic capacitor cover assembly according to one embodiment of the utility model;

[0025] Figure 5 It is a three-dimensional schematic diagram of a fixing member of an aluminum electrolytic capacitor cover assembly according to an embodiment of the utility model;

[0026] Figure 6 The utility model is an exploded schematic diagram of a terminal assembly of an aluminum electrolytic capacitor cover assembly according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Reference Figure 1-Figure 6 As shown, as an embodiment of the utility model, an aluminum electrolytic capacitor cover plate assembly 100 is provided, the cover plate assembly includes a metal packaging cover plate 300 and a fixing member 200 installed on the metal packaging cover plate 300; wherein the metal packaging cover plate 300 includes a disc-shaped cover plate body 30 and a terminal assembly 400 arranged on the cover plate body 30; the cover plate body 30 includes a circular plane 301, and a circular ring belt 302 arranged on the periphery of the circular plane 301 and extending perpendicular to the circular plane; the fixing member 200 includes an annular fixing body 20 matched with the circular ring belt 302, and a plurality of fixing plug-ins 21 extending on the annular fixing body 20; the plurality of fixing plug-ins 21 and the annular fixing body 20 are on the same cylindrical surface.

[0032] Reference Figure 3 , Figure 4As shown, the cover plate assembly also includes an insulating gasket 500, which is installed between the cover plate body 30 and the terminal assembly 400 to insulate the terminal assembly 400 from the 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 metal packaging cover plate 300 is packaged in the opening position of the capacitor aluminum shell by placing the annular belt 302 of the cover plate body 30 facing away from the core package. In some embodiments, the connection between the annular belt 302 and the circular plane 301 is set to be an arc transition.

[0033] Please refer to Figure 1-Figure 5 As shown, a reinforcing portion 201 is provided on the annular fixing body 20 of the fixing member 200, and the fixing plug-in 21 is provided at the position of the reinforcing portion 201. In some embodiments, the height of the annular fixing body 200 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. The annular fixing body 20 is fixed to the inner wall of the annular belt 302 by laser welding. In some embodiments, a plurality of fixing plug-ins 21 are equidistantly arranged on the annular fixing body 20. In an embodiment of the utility model, there are three fixing plug-ins 21, and the connecting line of the three fixing plug-ins forms an equilateral triangle.

[0034] Please refer to Figure 2-Figure 6 As shown, the circular plane 301 is provided with a terminal assembly mounting hole 303, and the insulating gasket 500 is provided with a circular hole 501 corresponding to the terminal assembly mounting hole 303; 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 metal packaging cover plate 300 is laser welded to the outer surface of the circular ring band 302 of the cover plate body 30 and the inner surface of the aluminum shell of the electrolytic capacitor to encapsulate the metal packaging cover plate 300 in the opening of the circular aluminum shell, and then encapsulate the core package in the circular aluminum shell. In some embodiments, the end of the fixing plug-in 21 is on the same horizontal plane as the end of the lead-out metal guide pin 40.

[0035] 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 cover, the surface of the cover is recessed, and the end of the lead-out metal guide pin 40 on the cover is on the same horizontal plane as the end of the fixed pin, thereby being fixed to the circuit board through the fixed pin 21 to stably connect and fix the cover to the circuit board.

[0036] Please refer to Figure 6As shown, in some embodiments, the terminal assembly 400 also includes an insulating rubber seat 41 and a metal sleeve 42; specifically, 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 303, thereby installing and fixing the terminal assembly 400 on the metal cover plate body 30.

[0037] Please refer to Figure 1-Figure 6 As shown, in some embodiments, the height of the circular belt 302 is smaller than the height of the metal sleeve 42 of the terminal assembly 400; the outer diameter of the metal sleeve 42 is compatible with the terminal assembly mounting hole 303; the insulating rubber seat 41 of the terminal assembly 400 includes a cylindrical sleeve 410 and a circular chassis 411, and the outer diameter of the circular chassis 411 is larger than the aperture of the terminal assembly mounting hole 303.

[0038] In some embodiments, there are two terminal assembly mounting holes 303 for mounting the positive and negative terminal assemblies. The two terminal assembly mounting holes 303 are symmetrically or asymmetrically arranged on the metal cover body 30 .

[0039] Reference Figure 6 As shown, the insulating rubber seat 41 of the terminal assembly is arranged between the lead-out metal guide pin 40 and the metal sleeve 42 to insulate the lead-out metal guide pin 40 from the metal sleeve 42; the lead-out metal guide pin 40 includes a connecting end 401 connected to an external device, an aluminum stem 402 and a welding end 403 connected to the core package.

[0040] In an embodiment of the utility model, the connection end 401 of the lead-out metal guide pin 40 connected to the external device and the aluminum stem 402 are circular strips, wherein the diameter of the aluminum stem 402 is greater than the diameter of the connection end 401 connected to the external device, and the length of the connection end 401 connected to the external device is greater than the length of the aluminum stem 402; the welding end 403 connected to the core package is disc-shaped and is welded to the battery cell of the aluminum electrolytic capacitor through the welding end 403 connected to the core package.

[0041] The center of the insulating rubber seat 41 is provided with a through hole 412 that matches the aluminum stem 402 for leading out the metal guide pin. The outer diameter of the aluminum stem 402 matches the inner diameter of the through hole 412, so that the aluminum stem 402 can be tightly sleeved inside the through hole 412. In some embodiments, the length of the through hole 412 is greater than the length of the aluminum stem 402. In some embodiments, the diameter of the cylindrical sleeve 410 is smaller than the diameter of the circular bottom plate 411. The circular bottom plate 411 of the insulating rubber seat 41 abuts against the welding end 403 of the metal guide pin 40 connected to the core package.

[0042] The metal sleeve 42 is sleeved on the surface of the cylindrical sleeve 410 of the insulating rubber seat 41. Corresponding to the cylindrical sleeve 410, the metal sleeve 42 is cylindrical, the inner diameter of the metal sleeve 42 is matched with the outer diameter of the cylindrical sleeve 410, the length of the metal sleeve 42 is greater than the length of the cylindrical sleeve 410, and the metal sleeve 42 is sleeved on the surface of the cylindrical sleeve 410 and then waisted. One end of the metal sleeve 42 is low-connected to the circular bottom plate 411 of the insulating rubber seat 41, and the other end is buckled with the cylindrical sleeve 410 of the insulating rubber seat 41 by crimping. In some implementations, the metal sleeve 42 is an aluminum tube.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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. An aluminum electrolytic capacitor cover plate assembly, characterized in that: It includes a metal packaging cover plate and a fixing part installed on the metal packaging cover plate; wherein the metal packaging cover plate includes a disc-shaped cover plate body and a terminal assembly arranged on the cover plate body; the cover plate body includes a circular plane and a circular ring belt arranged on the periphery of the circular plane and extending perpendicular to the circular plane; the fixing part includes an annular fixing body matched with the circular ring belt and a plurality of fixing plug-ins extending on the annular fixing body; the plurality of fixing plug-ins and the annular fixing body are on the same cylindrical surface.

2. The aluminum electrolytic capacitor cover plate assembly according to claim 1, characterized in that: A reinforcement portion is arranged on the annular fixing body of the fixing member, and the fixing plug-in unit is arranged at the position of the reinforcement portion.

3. The aluminum electrolytic capacitor cover plate assembly according to claim 1, characterized in that: The height of the annular fixing body is less than or equal to the height of the annular belt.

4. The aluminum electrolytic capacitor cover plate assembly according to claim 1, characterized in that: The annular fixing body is fixed to the inner wall of the circular ring belt by laser welding.

5. The aluminum electrolytic capacitor cover plate assembly according to claim 1, characterized in that: The thickness of the annular fixing body is greater than or equal to the thickness of the circular ring belt.

6. The aluminum electrolytic capacitor cover plate assembly according to claim 1, characterized in that: The plurality of fixing plug-ins are arranged at equal intervals on the annular fixing body.

7. The aluminum electrolytic capacitor cover plate assembly according to claim 1, characterized in that: There are three fixing plug-ins in total, and the connecting line of the three fixing plug-ins forms an equilateral triangle.

8. The aluminum electrolytic capacitor cover plate assembly according to claim 6, wherein: The terminal assembly includes a lead-out metal guide pin, and the ends of the plurality of fixing plug-ins are on the same horizontal plane as the ends of the lead-out metal guide pin.

9. The aluminum electrolytic capacitor cover plate assembly according to claim 1, wherein: The metal packaging cover plate is formed by laser welding the outer surface of the annular belt of the cover plate body to the inner surface of the aluminum shell of the electrolytic capacitor, so as to package the metal packaging cover plate in the opening of the aluminum shell.

10. The aluminum electrolytic capacitor cover plate assembly according to claim 1, wherein: An insulating gasket is also included, and the insulating gasket is installed between the cover plate body and the terminal assembly to insulate the terminal assembly from the cover plate body.

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