CN219873179U - Explosion-proof cover plate of aluminum electrolytic capacitor - Google Patents

Abstract

The utility model discloses an explosion-proof cover plate of an aluminum electrolytic capacitor, which comprises 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 the bottom surface of the groove is provided with a terminal assembly mounting hole and an explosion-proof structure recessed on the surface of the groove; the explosion-proof structure is arranged in the middle of the groove; the explosion-proof structure comprises an explosion-proof groove formed by recessing the surface of the groove and a protrusion formed on the surface of the metal cover plate main body corresponding to the explosion-proof groove. The explosion-proof cover plate of the aluminum electrolytic capacitor has firm structure and good explosion-proof performance, and can greatly improve the safety performance of the aluminum electrolytic capacitor.

Description

Explosion-proof cover plate of aluminum electrolytic capacitor

Technical Field

The utility model belongs to the technical field of capacitors, and particularly relates to an explosion-proof cover plate of 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.

Among them, the cover plate of most aluminum electrolytic capacitors is generally manufactured by compounding high-temperature-resistant rubber with a phenolic resin substrate, and the performance of the cover plate has a significant influence on the performance of the capacitor. When the capacitor fails, the core bag heats, the aluminum electrolyte expands when encountering heat, gas is generated from slow to rapid inside the aluminum shell, and the pressure can cause the cover plate of the capacitor to bulge upwards, so that the capacitor can burst. The cover plate of most electrolytic capacitors is generally provided with an explosion-proof valve, but most of the electrolytic capacitors are simple in explosion-proof structure and poor in explosion-proof effect, so that the service life of the capacitors is short, the service efficiency of the capacitors is low, and serious potential safety hazards exist.

It is thus seen that there is a need in the art for a solution to provide a robust explosion proof cover plate for aluminum 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 Invention

The utility model aims to provide an explosion-proof cover plate of an aluminum electrolytic capacitor, which solves 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 explosion-proof cover plate of an aluminum electrolytic capacitor comprises 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 the bottom surface of the groove is provided with a terminal assembly mounting hole and an explosion-proof structure recessed on the surface of the groove; the explosion-proof structure is arranged in the middle of the groove; the explosion-proof structure comprises an explosion-proof groove formed by recessing the surface of the groove and a protrusion formed on the surface of the metal cover plate main body corresponding to the explosion-proof groove.

In some embodiments, the bottom surface of the explosion proof tank is provided with a slot, and the bottom surface of the slot is a plane.

In some embodiments, the explosion-proof groove is long-strip-shaped, and the surface of the explosion-proof groove is provided with a smooth arc shape.

In some embodiments, the top of the protrusion forms an annular groove, and the bottom surface of the annular groove is planar.

In some embodiments, the top of the protrusion forms an annular groove, and a strip-shaped groove is arranged on the bottom surface of the annular groove.

In some embodiments, the terminal assembly includes an outgoing metal lead, an insulating rubber mount, and a metal sleeve; the insulating rubber seat is arranged between the lead-out metal guide pin and the metal sleeve, and the metal sleeve is welded at the terminal assembly mounting hole.

In some embodiments, the opening edge of the groove of the metal cover body is provided in an arc shape; the joint of the bottom surface and the side surfaces of the periphery of the groove is in arc transition.

In some embodiments, the recess of the metal cover body is an elongated square.

In some embodiments, the metal cover body is rectangular, and the connection part between every two adjacent surfaces of the outer surface of the metal cover body is arranged in an arc shape.

In some embodiments, the depth of the groove is less than the height of the metal sleeve of the terminal assembly; the outer diameter of the metal sleeve is matched with the terminal assembly mounting hole.

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

compared with the prior art, the explosion-proof cover plate of the aluminum electrolytic capacitor has the advantages of firm structure and good explosion-proof performance, and can greatly improve the safety performance of the aluminum electrolytic capacitor.

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 explosion-proof cover plate of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a terminal assembly of an explosion proof cover plate of an aluminum electrolytic capacitor according to one embodiment of the present utility model;

FIG. 3 is a schematic view showing a cut-away of an explosion-proof cover plate of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 4 is another schematic cross-sectional view of an explosion-proof cover plate of an aluminum electrolytic capacitor according to an embodiment of the present utility model;

FIG. 5 is another angular cutaway schematic view of an explosion-proof cover plate of an aluminum electrolytic capacitor according to an embodiment of the utility model;

fig. 6 is another angular schematic view of an explosion-proof cover plate 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, as an embodiment of the present utility model, an explosion-proof cover 300 for an aluminum electrolytic capacitor is provided, and as shown in the figure, the cover 300 for 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 and an explosion-proof structure 311 recessed on the surface of the groove are arranged on the bottom surface of the groove 31; the explosion-proof structure 311 is arranged in the middle of the groove 31; the explosion-proof structure 311 includes an explosion-proof groove 312 concavely formed at the surface of the recess 31 and a protrusion 313 formed at the surface of the metal cap body 30 corresponding to the explosion-proof groove 312.

In some embodiments, the bottom surface of the explosion proof slot 312 is provided with a slot 314; in some embodiments, the explosion-proof slot 312 is elongated, and the surface of the explosion-proof slot 312 is provided with a smooth arc shape; the slots 314 are configured as rectangular strip-shaped grooves, and the bottom surfaces of the slots 314 are plane.

It should be noted that, in other embodiments, the explosion-proof slot 312 and/or the slot 314 may be configured in any shape, which is not limited to the above-mentioned embodiments.

In some embodiments, the top of the protrusion 313 forms an annular groove 315, and the bottom surface of the annular groove 315 is a plane; in some embodiments, as shown in FIG. 1, a strip groove 316 is provided on the bottom surface of the annular groove 315.

The terminal assembly 400 comprises a lead-out metal guide pin 40, an insulating rubber seat 41 and a metal sleeve 42; the insulating rubber seat 41 is disposed between the lead-out metal pins 40 and the metal sleeve 42, and the metal sleeve 42 is welded to the terminal assembly mounting hole 310, so that the terminal assembly 400 is mounted and fixed on the metal cover body 30.

Referring to fig. 5, the opening edge of the groove 31 of the metal cover body 30 is provided in an arc shape to form an arc opening inclined inward; 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 utility model, the groove 31 of the metal cover body 30 is a rectangular shape. In some embodiments, the metal cover body 30 has a rectangular shape, and the connection between each two adjacent surfaces of the outer surface of the metal cover body 30 is configured to have an arc shape.

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 insulating rubber seat 41 of the terminal assembly 400 includes a cylindrical sleeve 410 and a circular bottom plate 411, and the circular bottom plate 411 has an outer diameter larger than the aperture of the terminal assembly mounting hole 310.

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. The explosion-proof structure 311 is disposed at a position between the two terminal assembly mounting holes 310. In some embodiments, the midline of the explosion proof slot 312 coincides with the center line of the two terminal assembly mounting holes 310.

Referring to fig. 5 and 6, an insulating rubber seat 41 of the terminal assembly is provided between the lead-out metal lead 40 and the metal sleeve 42 so as to insulate the lead-out metal lead 40 from the metal sleeve 42; the lead-out metal guide pin 40 comprises a CP lead 401, an aluminum stem 402 and a welding base 403.

In the embodiment of the utility model, the CP lead 401 and the aluminum stem 402 from which the metal guide pin is led out 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 is disc-shaped and is welded to the battery cell of the aluminum electrolytic container through the welding base.

The insulating rubber seat 41 comprises a cylindrical sleeve 410 and a circular chassis 411, a through hole 412 matched with the aluminum stem 402 for leading out the metal guide pin is arranged in the center of the insulating rubber seat 41, 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 in 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 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 arranged on the surface of the cylindrical sleeve 410 of the insulating rubber seat 41, and corresponds 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 that of the cylindrical sleeve 410, the metal sleeve 42 is sleeved on the surface of the cylindrical sleeve 410 to be bunched, 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 cylindrical sleeve 410 of the insulating rubber seat 41 through a curled edge. In some implementations, the metal sleeve 42 is an aluminum tube.

In some implementations, the height of the protrusions 313 formed on the surface of the metal cover body 30 is no greater than the thickness of the circular bottom plate 411 of the insulating rubber mount 41.

In some embodiments, the welding base 403 of the lead-out metal pin 40 is provided with a circular protruding strip 404 on the upper surface, and an annular groove 405 is formed between the circular 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 should be understood that, in some embodiments, the lead-out metal pins 40 may be in the shape of strips with other irregular patterns, and the shapes of the lead-out metal pins are not particularly limited in this embodiment, and any pattern should be included in the protection scope of the present utility model as long as the pattern 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 (10)

1. An explosion-proof cover plate of an aluminum electrolytic capacitor 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 the bottom surface of the groove is provided with a terminal assembly mounting hole and an explosion-proof structure recessed on the surface of the groove; the explosion-proof structure is arranged in the middle of the groove; the explosion-proof structure comprises an explosion-proof groove formed by recessing the surface of the groove and a protrusion formed on the surface of the metal cover plate main body corresponding to the explosion-proof groove.

2. The aluminum electrolytic capacitor explosion-proof cover plate as claimed in claim 1, wherein: the bottom surface of the explosion-proof groove is provided with a slot, and the bottom surface of the slot is a plane.

3. The aluminum electrolytic capacitor explosion-proof cover plate as claimed in claim 1, wherein: the anti-explosion groove is long-strip-shaped, and the surface of the anti-explosion groove is provided with a smooth arc.

4. An aluminum electrolytic capacitor explosion-proof cover plate as claimed in claim 2 or 3, wherein: the top of the protrusion forms an annular groove, and the bottom surface of the annular groove is a plane.

5. An aluminum electrolytic capacitor explosion-proof cover plate as claimed in claim 2 or 3, wherein: the top of the protrusion forms an annular groove, and a strip-shaped groove is arranged on the bottom surface of the annular groove.

6. The aluminum electrolytic capacitor explosion-proof cover plate as set forth in claim 5, wherein: the terminal assembly comprises an outgoing metal guide pin, an insulating rubber seat and a metal sleeve; the insulating rubber seat is arranged between the lead-out metal guide pin and the metal sleeve, and the metal sleeve is welded at the terminal assembly mounting hole.

7. The aluminum electrolytic capacitor explosion-proof cover plate as set forth in claim 5, wherein: the edge of the opening of the groove of the metal cover plate main body is arranged to be arc-shaped; the joint of the bottom surface and the side surfaces of the periphery of the groove is in arc transition.

8. The aluminum electrolytic capacitor explosion-proof cover plate as set forth in claim 7, wherein: the groove of the metal cover plate main body is in a long square shape.

9. The aluminum electrolytic capacitor explosion-proof cover plate as set forth in claim 8, wherein: the metal cover plate main body is rectangular, and the joint of every two adjacent surfaces of the outer surface of the metal cover plate main body is arranged into an arc shape.

10. The aluminum electrolytic capacitor explosion-proof cover plate as set forth in claim 6, wherein: the depth of the groove is smaller than the height of the metal sleeve of the terminal assembly; the outer diameter of the metal sleeve is matched with the terminal assembly mounting hole.