CN221040842U - Annular cover plate of electrolytic capacitor and electrolytic capacitor - Google Patents

Abstract

The utility model discloses an electrolytic capacitor annular cover plate and an electrolytic capacitor, comprising a metal cover plate main body and a terminal assembly arranged on the metal cover plate main body; the metal cover plate main body is provided with a groove, and a terminal assembly mounting hole is formed in the bottom surface of the groove; the terminal assembly comprises an outgoing metal guide pin, an insulating rubber seat and a metal sleeve; the insulation rubber seat is arranged between the lead-out metal guide pin and the metal sleeve, so that insulation between the lead-out metal guide pin and the metal sleeve is realized, and two ends of the insulation rubber seat protrude out of the metal sleeve to be exposed outside the metal sleeve; the metal sleeve is welded on the metal cover plate main body. The annular cover plate of the electrolytic capacitor and the electrolytic capacitor have strong adaptability and can be flexibly changed so as to be used for various application scenes.

Description

Annular cover plate of electrolytic capacitor and electrolytic capacitor

Technical Field

The utility model belongs to the technical field of capacitors, and particularly relates to an electrolytic capacitor annular cover plate and an 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. Wherein, the structure and the function of the cover plate of most aluminum electrolytic capacitors are single, and the front surface of the cover plate and the back surface of the cover plate cannot be used interchangeably; specifically, the front of apron is the one side of contact outside, and positive negative pole terminal is drawn forth to the front, and the back of apron is the one side that is close to the condenser core package, and the back is towards the condenser inside after the encapsulation is accomplished to the condenser, is not revealed. However, along with the complex and changeable application scenes, the adaptability requirement on the cover plate of the electrolytic capacitor is higher and higher, and the cover plate for strictly distinguishing the front surface and the back surface cannot be flexibly used for some special scenes.

It is thus seen that there is a need in the art to develop a solution to provide a flexible annular cover plate for electrolytic capacitors and electrolytic capacitors.

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 utility model aims to provide an electrolytic capacitor annular cover plate and an electrolytic capacitor, which are used for solving at least one of the problems in the background technology.

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

An electrolytic capacitor annular cover plate and an electrolytic capacitor comprise a metal cover plate main body and a terminal assembly arranged on the metal cover plate main body; the metal cover plate main body is provided with a groove, and a terminal assembly mounting hole is formed in the bottom surface of the groove; the terminal assembly comprises an outgoing metal guide pin, an insulating rubber seat and a metal sleeve; the insulation rubber seat is arranged between the lead-out metal guide pin and the metal sleeve, so that insulation between the lead-out metal guide pin and the metal sleeve is realized, and two ends of the insulation rubber seat protrude out of the metal sleeve to be exposed outside the metal sleeve; the metal sleeve is welded on the metal cover plate main body.

In some embodiments, the metal cover body is annular, and the opening edge of the groove of the metal cover body is provided with an arc shape, so that an inward inclined arc opening is formed.

In some embodiments, the metal cover body is annular, and the outer surface of the metal cover body is provided with an arc shape at the joint of each adjacent two sides.

In some embodiments, the depth of the groove is less than the height of the metal sleeve of the terminal assembly.

In some embodiments, the outer diameter of the metal sleeve is adapted to the terminal assembly mounting hole.

In some embodiments, the lead-out metal lead comprises a CP lead, an aluminum stem and a welded base; and the CP lead wire for leading out the metal guide pin and the aluminum stem are in a circular strip shape, wherein the diameter of the aluminum stem is larger than that of the CP lead wire.

In some embodiments, the insulating rubber mount comprises a cylindrical tube and a circular chassis; the cylindrical tube comprises a first cylindrical tube and a second cylindrical tube with the same inner diameter.

In some embodiments, the first cylindrical tube has an outer diameter that is less than an outer diameter of the second cylindrical tube and the first cylindrical tube has a length that is less than a length of the second cylindrical tube.

In some embodiments, a through hole matched with an aluminum stem leading out the metal guide pin is arranged in the center of the insulating rubber seat, and the outer diameter of the aluminum stem is matched with the inner diameter of the through hole.

The other technical scheme of the utility model is as follows:

An electrolytic capacitor comprises an aluminum shell, a core pack encapsulated in the aluminum shell and the annular cover plate of the electrolytic capacitor according to any one of the technical schemes; wherein, one surface of the cover plate main body provided with the groove faces outwards to encapsulate the core package in the aluminum shell, or the plane of the cover plate main body faces outwards to encapsulate the core package in the aluminum shell; when the groove of the cover plate main body faces outwards, the surface of the electrolytic capacitor is in an annular concave shape; and when the plane of the cover plate main body is outward, the surface of the electrolytic capacitor is an annular plane.

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

Compared with the prior art, the annular cover plate of the electrolytic capacitor and the electrolytic capacitor have strong adaptability and can be flexibly changed so as to be used in various application scenes.

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 perspective view showing an annular cover plate of an electrolytic capacitor according to an embodiment of the present utility model;

FIG. 2 is an exploded view of an electrolytic capacitor annular cover plate according to one embodiment of the present utility model;

FIG. 3 is a schematic view of a terminal assembly of an annular cover plate of an electrolytic capacitor according to one embodiment of the present utility model;

FIG. 4 is an exploded view of a terminal assembly of an annular cover plate of an electrolytic capacitor according to one embodiment of the present utility model;

FIG. 5 is a cutaway illustration of a terminal assembly of an annular cover plate of an electrolytic capacitor in accordance with one embodiment of the present utility model;

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

FIG. 7 is a perspective view of an electrolytic capacitor annular cover plate according to one embodiment of the present utility model;

Fig. 8 is a perspective view of an electrolytic capacitor according to another 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 5, as an embodiment of the present utility model, an annular cover 300 of an electrolytic capacitor is provided, and as shown in fig. 1 to 5 and 7, the annular cover 300 of an aluminum electrolytic capacitor of the present utility model includes a metal cover body 30, and a terminal assembly 400 disposed on the metal cover body 30; wherein, the metal cover body 30 is provided with a groove 31, and a terminal assembly mounting hole 310 is arranged on the bottom surface of the groove 31; the terminal assembly 400 comprises a lead-out metal guide pin 40, an insulating rubber seat 41 and a metal sleeve 42; wherein, 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, and two ends of the insulating rubber seat protrude out of the metal sleeve to be exposed outside the metal sleeve; the lead-out metal guide pin 40 comprises a CP lead 401, an aluminum stem 402 and a welding base 403; the metal sleeve is welded to the cover plate of the outer container.

Referring to fig. 1-2, the metal cover body 30 is in a ring shape, and the opening edge of the groove 31 of the metal cover body 30 is arranged in an arc shape, thereby forming an arc-shaped opening which is inclined inwards; the junction of the bottom surface and the peripheral side surfaces of the groove 31 is provided with an arc transition. In the embodiment of the present utility model, the groove 31 of the metal cover body 30 is an annular groove. In some embodiments, the metal cover body 30 is annular, and the outer surface of the metal cover body 30 is curved at the junction of each adjacent two sides.

In the embodiment of the present utility model, the lead-out metal pins of the terminal assembly 400 are mounted on one surface of the recess of the cover plate main body, so that the surface of the cover plate of the electrolytic capacitor is an annular recess; or the lead-out metal guide pin of the terminal assembly is arranged on one plane surface of the cover plate main body, so that the surface of the cover plate of the electrolytic capacitor is plane.

In some embodiments, the depth of the recess 31 is less than the height of the metal sleeve 42 of the terminal assembly 400; the outer diameter of the metal sleeve 42 is adapted to the terminal assembly mounting hole 310.

The CP lead 401 from which the metal guide pin is led out and the aluminum stem 402 are in a circular strip shape, wherein the diameter of the aluminum stem 402 is larger than that of the CP lead 401, and the length of the CP lead 401 is larger than that of the aluminum stem 402;

The welding base 403 has a disk shape, and is welded to a cell (not shown) of the aluminum electrolytic capacitor through the welding base 403.

Referring to fig. 3 to 5, the insulating rubber mount 41 includes a cylindrical tube 410 and a circular chassis 411; the cylindrical tube 410 includes a first cylindrical tube 4100 and a second cylindrical tube 4101 having the same inner diameter; wherein the outer diameter of the first pillar 4100 is smaller than the outer diameter of the second pillar 4101, and the length of the first pillar is smaller than the length of the second pillar; the length of the second cylindrical pipe is smaller than that of the metal sleeve. The center of the insulating rubber seat 41 is provided with a through hole 412 matched with the aluminum stem 402 from which the metal guide pin is led out, and the outer diameter of the aluminum stem 402 is matched with 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 two cylindrical tubes is less than the diameter of the circular chassis 411. The circular chassis 411 of the insulating rubber mount 41 is abutted against the welding base 403 from which the metal lead 40 is led out.

The metal sleeve 42 is sleeved on the surface of the cylindrical tube 410 of the insulating rubber seat 41, corresponding to the cylindrical tube 410, the metal sleeve 42 is cylindrical, the inner diameter of the metal sleeve 42 is matched with the outer diameter of the second cylindrical tube 4101, the length of the metal sleeve 42 is larger than that of the second cylindrical tube, the metal sleeve 42 is sleeved on the surface of the second cylindrical tube 4101 and then is subjected to girdling, one end of the metal sleeve 42 is connected with the circular chassis 411 of the insulating rubber seat 41 in a low-pressure manner, and the other end of the metal sleeve 42 is buckled with the second cylindrical tube 410 of the insulating rubber seat 41 through hemming; the first cylindrical tube is higher than the metal sleeve, and the curled edge of the metal sleeve is isolated from the leading-out metal guide pin, so that the insulation effect of the metal sleeve and the leading-out metal guide pin is better. In some implementations, the metal sleeve 42 is an aluminum tube.

Referring to fig. 4 and 5, in some embodiments, an annular protruding strip 404 is disposed on the upper surface of the welding base 403 of the lead-out metal lead pin 40, and an annular groove 405 is formed between the annular protruding strip 404 and the bottom of the aluminum stem; so designed, when the metal sleeve 42 is in a girdling state, the insulating rubber seat 41 is extruded, the circular chassis 411 of the insulating rubber seat 41 is partially extruded and embedded into the annular groove 405, and meanwhile, the circular protruding strip 404 is extruded and embedded into the circular chassis 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.

It is understood that, in some embodiments, the lead-out metal pins may be in the shape of strips with other irregular patterns, and the shape is not particularly limited in this embodiment, and any pattern should fall within 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 metal cap body 30.

Referring to fig. 6 and 8, an electrolytic capacitor 100 according to another embodiment of the present utility model includes an aluminum case 10, a core pack enclosed in the aluminum case, and an electrolytic capacitor annular cover plate 300 according to any of the foregoing embodiments; wherein the facing of the cover body 30 provided with the groove is outward to enclose the core package in the aluminum case 10, or the facing of the cover body 30 is outward to enclose the core package in the aluminum case 10; when the groove of the cap body 30 faces outward, the surface of the electrolytic capacitor 100 is in an annular recess; and when the plane of the cap body 30 is outward, the surface of the electrolytic capacitor 100 is a ring-shaped plane.

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 (10)

1. An electrolytic capacitor annular cover plate which is characterized in that: the metal cover plate comprises a metal cover plate body and a terminal assembly arranged on the metal cover plate body; the metal cover plate main body is provided with a groove, and a terminal assembly mounting hole is formed in the bottom surface of the groove; the terminal assembly comprises an outgoing metal guide pin, an insulating rubber seat and a metal sleeve; the insulation rubber seat is arranged between the lead-out metal guide pin and the metal sleeve, so that insulation between the lead-out metal guide pin and the metal sleeve is realized, and two ends of the insulation rubber seat protrude out of the metal sleeve to be exposed outside the metal sleeve; the metal sleeve is welded on the metal cover plate main body.

2. The electrolytic capacitor annular cover plate of claim 1, wherein: the metal cover plate main body is annular, and the opening edge of the groove of the metal cover plate main body is arc-shaped, so that an inward inclined arc-shaped opening is formed.

3. The electrolytic capacitor annular cover plate of claim 1, wherein: the metal cover plate main body is annular, and the outer surface of the metal cover plate main body is arc-shaped at the joint of every two adjacent surfaces.

4. The electrolytic capacitor annular cover plate of claim 1, wherein: the depth of the groove is less than the height of the metal sleeve of the terminal assembly.

5. The electrolytic capacitor annular cover plate of claim 1, wherein: the outer diameter of the metal sleeve is matched with the terminal assembly mounting hole.

6. The electrolytic capacitor annular cover plate of claim 1, wherein: the lead-out metal guide pin comprises a CP lead, an aluminum stem and a welding base; and the CP lead wire for leading out the metal guide pin and the aluminum stem are in a circular strip shape, wherein the diameter of the aluminum stem is larger than that of the CP lead wire.

7. The electrolytic capacitor annular cover plate of claim 1, wherein: the insulating rubber seat comprises a cylindrical pipe and a circular chassis; the cylindrical tube comprises a first cylindrical tube and a second cylindrical tube with the same inner diameter.

8. The electrolytic capacitor annular cover plate of claim 7, wherein: the outer diameter of the first cylindrical pipe is smaller than that of the second cylindrical pipe, and the length of the first cylindrical pipe is smaller than that of the second cylindrical pipe.

9. The electrolytic capacitor annular cover plate of claim 6, wherein: the center of the insulating rubber seat is provided with a through hole matched with an aluminum stem for leading out the metal guide pin, and the outer diameter of the aluminum stem is matched with the inner diameter of the through hole.

10. An electrolytic capacitor, characterized in that: comprising an aluminum shell, a core pack encapsulated in the aluminum shell, and the electrolytic capacitor annular cover plate as set forth in any one of claims 1 to 9; wherein, one surface of the cover plate main body provided with the groove faces outwards to encapsulate the core package in the aluminum shell, or the plane of the cover plate main body faces outwards to encapsulate the core package in the aluminum shell; when the groove of the cover plate main body faces outwards, the surface of the electrolytic capacitor is in an annular concave shape; and when the plane of the cover plate main body is outward, the surface of the electrolytic capacitor is an annular plane.