CN221040843U

CN221040843U - Aluminum electrolytic capacitor

Info

Publication number: CN221040843U
Application number: CN202322792029.5U
Authority: CN
Inventors: 尹志华; 李良; 尹超
Original assignee: Shenzhen Jianghao Electron Co ltd
Current assignee: Shenzhen Jianghao Electron Co ltd
Priority date: 2023-10-16
Filing date: 2023-10-16
Publication date: 2024-05-28
Anticipated expiration: 2033-10-16

Abstract

The utility model discloses an aluminum electrolytic capacitor, which comprises an aluminum shell, a core package and a metal cover plate, wherein the core package is sealed and installed in the aluminum shell; the metal cover plate comprises a round cover plate main body, a terminal assembly arranged on the cover plate main body and an explosion-proof structure; one surface of the cover plate main body is a plane, the other surface of the cover plate main body is a disc-shaped concave surface, and the diameter of a circular opening of the concave surface is larger than that of a circle at the bottom of the concave; the plane of the cover plate main body faces outwards to encapsulate the core package in the aluminum shell, or the concave surface of the cover plate main body faces outwards to encapsulate the core package in the aluminum shell. The aluminum electrolytic capacitor has a firm structure, and the encapsulation of the encapsulation cover plate can be changed along with the application scene and the environment, so that the adaptability of the aluminum electrolytic capacitor is greatly improved.

Description

Aluminum electrolytic capacitor

Technical Field

The utility model belongs to the technical field of capacitors, and particularly relates to an aluminum electrolytic capacitor.

Background

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, photovoltaic products, high-speed railway and aviation and military equipment, etc. In the technical field of consumer electronics, the application of the aluminum electrolytic capacitor has the characteristics of small volume, large stored electric quantity and high cost performance along with structural transformation and technical progress, and the aluminum electrolytic capacitor is expanded in various emerging fields such as energy-saving lamps, frequency converters, new energy sources and the like, and has wider application range.

At present, an aluminum electrolytic capacitor is generally composed of a core bag formed by winding positive and negative aluminum foils and electrolytic paper, a cylindrical aluminum shell and a sealing cover plate with positive and negative wiring terminals, wherein positive and negative terminal lead-out holes are formed in the cover plate, and positive and negative terminals are arranged on the cover plate through the through holes. The cover plate of most aluminum electrolytic capacitors is generally made by compounding high-temperature-resistant rubber and a phenolic resin substrate, the performance of the cover plate has great influence on the performance of the capacitors, however, the packaging cover plate of the current aluminum electrolytic capacitors has a plurality of defects that the packaging cover plate is not firm enough and not firm enough after packaging; and the cover plate of most aluminum electrolytic capacitors has single functional structure, and the explosion-proof valve is simple, so that the performance of the aluminum electrolytic capacitors is greatly influenced.

It is thus seen that there is a need in the art for a solution to the above-described current state of the art that provides an aluminum electrolytic capacitor.

The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present utility model and is not necessarily prior art to the present application and is not intended to be used as an aid in the evaluation of the novelty and creativity of the present utility model in the event that no clear evidence indicates that such is already disclosed at the date of filing of the present application.

Disclosure of utility model

The present utility model is directed to an aluminum electrolytic capacitor that solves at least one of the above-mentioned problems of the related art.

In order to achieve the above object, the technical solution of the embodiment of the present utility model is as follows:

An aluminum electrolytic capacitor comprises an aluminum shell, a core package sealed and installed in the aluminum shell, and a metal cover plate for sealing the core package in the aluminum shell; the metal cover plate comprises a round cover plate main body, a terminal assembly arranged on the cover plate main body and an explosion-proof structure; one surface of the cover plate main body is a plane, the other surface of the cover plate main body is a disc-shaped concave surface, and the diameter of a circular opening of the concave surface is larger than that of a circle at the bottom of the concave; the plane of the cover plate main body faces outwards to encapsulate the core package in the aluminum shell, or the concave surface of the cover plate main body faces outwards to encapsulate the core package in the aluminum shell.

In some embodiments, the cover plate body is provided with a terminal assembly mounting hole thereon; the terminal assembly comprises a screw terminal, an insulating seat, a rubber gasket and a sealing metal sleeve; the insulating seat of the terminal assembly is arranged at the terminal assembly mounting hole.

In some embodiments, the terminal assembly mounting holes include arcuate surfaces and planar surfaces.

In some embodiments, the sealing metal sleeve is welded to the cover plate body by laser; the insulating seat is arranged between the screw terminal and the sealing metal sleeve.

In some embodiments, the screw terminal includes a weld end and a lead-out end; the welding end is used for being connected with the electrolytic capacitor core pack, and the leading-out end is used for being connected with an external device.

In some embodiments, the insulating base is provided with a through hole, and the screw terminal is sleeved at the through hole.

In some embodiments, the welded end of the screw terminal and the lead-out end are cylindrical; wherein the diameter of the welding end is smaller than that of the leading-out end.

In some embodiments, the insulating base includes a first annular portion, a second annular portion, and a third annular portion; wherein the outer diameter of the second annular part is larger than that of the first annular part and the third annular part.

In some embodiments, the insulating seat is cylindrical, and the cross section of the first annular portion and the cross section of the second annular portion are circular; the third annular part is provided with at least two planes on the annular periphery.

In some embodiments, the rubber gasket is circular, and the aperture of the rubber gasket is equal to the outer diameter of the first annular portion of the insulating seat, so that the rubber gasket can be sleeved on the first annular portion and stopped by the second annular portion.

The technical scheme of the utility model has the beneficial effects that:

Compared with the prior art, the aluminum electrolytic capacitor is firm in structure, and the packaging of the packaging cover plate can be changed along with the application scene and the environment, so that the adaptability of the aluminum electrolytic capacitor is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a partial perspective view of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 2 is a perspective view of a metal cover plate of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 3 is another angular view of a metal cover plate of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a metal cover plate of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 5 is an exploded view of a terminal assembly of an aluminum electrolytic capacitor according to one embodiment of the present utility model;

FIG. 6 is a perspective view of a terminal assembly of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 7 is an exploded view of a terminal assembly of an aluminum electrolytic capacitor according to one embodiment of the present utility model;

fig. 8 is a schematic view of an explosion-proof main body of an aluminum electrolytic capacitor according to an embodiment of the present utility model.

Detailed Description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present utility model more clear and make those skilled in the art better understand the solutions of the present utility model, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for a fixing function or for a circuit communication function.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing embodiments of the utility model and to simplify the description by referring to the figures, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In describing embodiments of the present utility model, unless explicitly stated and limited otherwise, the meaning of "plurality" is two or more, and the terms "mounted," "connected," "secured," etc. are to be construed broadly, as for example, they may be fixedly connected, detachably connected, or as a unit; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 8, as an embodiment of the present utility model, there is provided an aluminum electrolytic capacitor 100, and as shown in fig. 1 to 6, the aluminum electrolytic capacitor 100 of the present utility model comprises an aluminum case 10, a core pack sealed and mounted in the aluminum case 10, and a metal cap plate 300 for sealing the core pack in the aluminum case; wherein, the metal cover 300 includes a circular cover body 30, a terminal assembly 400 mounted on the cover body 30, and an explosion-proof structure; wherein, one surface of the cover plate main body 30 is a plane, the other surface is a disc-shaped concave surface, and the diameter of a circular opening of the concave surface is larger than the diameter of a circle at the bottom of the concave; the flat face of the cover body 30 faces outwardly to enclose the core envelope within the aluminum shell 10, or the concave face of the cover body 30 faces outwardly to enclose the core envelope within the aluminum shell.

Specifically, the cover main body 30 is provided with a terminal assembly mounting hole 310; wherein the terminal assembly 400 includes a screw terminal 40, an insulating base 41, a rubber gasket 42, and a sealing metal sleeve 43; the terminal assembly mounting hole 310 comprises an arc surface and a plane, and the insulating seat 41 of the terminal assembly is mounted at the terminal assembly mounting hole 310; the sealing metal sleeve 43 is welded to the cap plate of the aluminum electrolytic capacitor by laser to mount the terminal assembly 400 to the cap plate of the aluminum electrolytic capacitor. The insulating seat is disposed between the screw terminal 40 and the sealing metal sleeve 43, so that the screw terminal 40 and the sealing metal sleeve 43 are insulated from each other.

Referring to fig. 5-7, in some embodiments, the screw terminal 40 includes a soldering terminal 401 and a lead-out terminal 402, the soldering terminal 401 is used for connecting to an electrolytic capacitor core package, and the lead-out terminal 402 is used for connecting to an external device; wherein the outlet 402 is provided with an internal thread 403, by means of which internal thread 403 a threaded connection with an external device is made.

Referring to fig. 5 and 7, in some embodiments, the insulating base 41 is provided with a through hole, and the screw terminal 40 is sleeved at the through hole; the insulating base 41 includes a first annular portion 410, a second annular portion 411, and a third annular portion 412; wherein the outer diameter of the second annular portion 412 is greater than the outer diameters of the first and third annular portions. In some embodiments, the insulating base 41 is cylindrical, and the cross sections of the first annular portion 410 and the second annular portion 411 are circular. The third annular portion 412 is provided with at least two planes 414 on the annular periphery, in this embodiment, two planes, which are symmetrically distributed on the annular periphery of the third annular portion 412. It should be noted that, in some embodiments, the plane may be regularly or irregularly disposed on the annular periphery of the third annular portion. When the bolt terminal 400 is mounted on the cap plate, the third annular portion 412 is fitted with the terminal mounting hole on the cap plate, and a flat surface is provided on the annular peripheral edge of the third annular portion 412, so that the bolt terminal can be prevented from rotating.

Corresponding to the insulating seat, the rubber gasket 42 is circular, and the aperture of the rubber gasket 42 is equal to the outer diameter of the first annular portion 410 of the insulating seat 41, so that the rubber gasket 42 can be sleeved on the first annular portion 410 and stopped by the second annular portion 411.

The sealing metal sleeve 43 is sleeved on the first annular part and the second annular part of the insulating seat 41, and the rubber pad 42 is placed between the metal sleeve 43 and the first annular part 410 of the insulating seat 41; one end of the metal sleeve 43 is provided with a stop ring 430, and the first annular part 410 of the insulating seat 41 is fastened by the stop ring 430; the other end of the gold seal metal sleeve 43 is an open end which is welded to the metal cover plate of the aluminum electrolytic capacitor by laser.

Referring to fig. 7, in some embodiments, the welding end 401 of the screw terminal 40 and the lead-out end 402 are cylindrical, wherein the diameter of the welding end 401 is smaller than the diameter of the lead-out end 402. It should be understood that, in some embodiments, the welding end 401 and the leading-out end 402 of the screw terminal 40 may be in the shape of a strip with other irregular patterns, and no particular limitation is imposed in the present embodiment, and any pattern is included in the scope of the present application as long as the pattern does not deviate from the gist of the present application.

In some embodiments, the terminal assembly mounting holes 310 are two for mounting the positive and negative terminal assemblies. The two terminal assembly mounting holes 310 are symmetrically or asymmetrically provided on the cap body 30. The explosion-proof structure is arranged at a position between the positive terminal assembly and the negative terminal assembly.

Referring to fig. 8, in some embodiments, the explosion proof structure includes an explosion proof body 50 and a plurality of explosion proof slots 500 provided on the explosion proof body 50; in some embodiments, the explosion-proof body 50 has a circular shape, and the explosion-proof groove 500 includes two linear grooves 501 and a circular groove 502 disposed at the junction of the two linear grooves. In some embodiments, the two linear slots 501 are perpendicular to each other. In the embodiment of the present utility model, the number of the explosion-proof grooves 500 is four, and the four explosion-proof grooves 500 enclose a square shape on the surface of the explosion-proof main body 50. In some embodiments, the linear grooves 501 are the same or different depth than the circular grooves 502; in some embodiments, the linear slot 501 has a depth greater than or equal to one half the thickness of the explosion proof body. In the embodiment of the utility model, the opening of the explosion-proof groove faces the outer surface of the cover plate. In some embodiments, the linear grooves 501 are square grooves and the circular grooves 502 are cylindrical grooves.

Referring to fig. 3, 4 and 8, in some implementations, the metal cover body is provided with a circular hole 311 consistent with the structure of the explosion-proof body, and the explosion-proof structure is welded at the circular hole 311 by laser. In some embodiments, the explosion proof structure is integrally formed with the metal cover body 30 by stamping with the surface of the metal cover body 30. In some embodiments, the explosion-proof structure is an aluminum film. It should be noted that, in other embodiments, the explosion-proof slot may be configured in other structures, and no matter what structure is configured, the explosion-proof slot should be within the scope of the present utility model as long as the structure does not deviate from the gist of the present utility model.

It is to be understood that the foregoing is a further detailed description of the present utility model in connection with the specific/preferred embodiments, and that no particular implementation of the present utility model is to be considered limited to such description. It will be apparent to those skilled in the art to which the present utility model pertains that many substitutions and modifications of these described embodiments may be made without departing from the inventive concepts herein, and these substitutions and modifications are intended to be within the scope of this patent. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model.

In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. Although the embodiments of the present utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope as defined by the appended claims.

Furthermore, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. Those of ordinary skill in the art will readily appreciate that the above-described disclosures, procedures, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Claims

1. An aluminum electrolytic capacitor, characterized in that: comprises an aluminum shell, a core package sealed and installed in the aluminum shell and a metal cover plate used for sealing the core package in the aluminum shell; the metal cover plate comprises a round cover plate main body, a terminal assembly arranged on the cover plate main body and an explosion-proof structure; one surface of the cover plate main body is a plane, the other surface of the cover plate main body is a disc-shaped concave surface, and the diameter of a circular opening of the concave surface is larger than that of a circle at the bottom of the concave; the plane of the cover plate main body faces outwards to encapsulate the core package in the aluminum shell, or the concave surface of the cover plate main body faces outwards to encapsulate the core package in the aluminum shell.

2. The aluminum electrolytic capacitor as recited in claim 1, wherein: the cover plate main body is provided with a terminal assembly mounting hole; the terminal assembly comprises a screw terminal, an insulating seat, a rubber gasket and a sealing metal sleeve; the insulating seat of the terminal assembly is arranged at the terminal assembly mounting hole.

3. The aluminum electrolytic capacitor as recited in claim 2, wherein: the terminal assembly mounting hole includes an arcuate surface and a planar surface.

4. The aluminum electrolytic capacitor as recited in claim 2, wherein: the sealing metal sleeve is welded on the cover plate main body through laser; the insulating seat is arranged between the screw terminal and the sealing metal sleeve.

5. The aluminum electrolytic capacitor as recited in claim 2, wherein: the screw terminal comprises a welding end and a leading-out end; the welding end is used for being connected with the electrolytic capacitor core pack, and the leading-out end is used for being connected with an external device.

6. The aluminum electrolytic capacitor as recited in claim 2, wherein: the insulating seat is provided with a through hole, and the screw terminal is sleeved at the through hole.

7. The aluminum electrolytic capacitor as recited in claim 5, wherein: the welding end of the screw terminal and the leading-out end are columnar; wherein the diameter of the welding end is smaller than that of the leading-out end.

8. The aluminum electrolytic capacitor as recited in claim 2, wherein: the insulating seat comprises a first annular part, a second annular part and a third annular part; wherein the outer diameter of the second annular part is larger than that of the first annular part and the third annular part.

9. The aluminum electrolytic capacitor as recited in claim 8, wherein: the insulating seat is cylindrical, and the cross section of the first annular part and the cross section of the second annular part are circular; the third annular part is provided with at least two planes on the annular periphery.

10. The aluminum electrolytic capacitor as recited in claim 9, wherein: the rubber gasket is circular, and the aperture of the rubber gasket is equal to the outer diameter of the first annular part of the insulating seat, so that the rubber gasket can be sleeved on the first annular part and stopped by the second annular part.