CN212695018U - High-performance aluminum electrolytic capacitor cover plate - Google Patents

Abstract

The utility model discloses a high-performance aluminum electrolytic capacitor cover plate, which comprises a cover plate main body, a terminal component arranged on the cover plate main body and an explosion-proof valve; the terminal assembly comprises a positive electrode, a negative electrode, a positive lead-out terminal, a negative lead-out terminal, a metal rivet sheet and a current collecting electrode sheet, wherein the positive lead-out terminal and the negative lead-out terminal are led out corresponding to the positive electrode and the negative electrode; each leading-out terminal is bent in a horn shape, and the positive and negative leading-out terminals are respectively riveted on the positive and negative electrodes; the cover plate main body comprises a substrate, a rubber layer and an insulating layer, wherein the rubber layer and the insulating layer are respectively arranged on the upper surface of the substrate and the lower surface of the substrate. The high-performance aluminum electrolytic capacitor cover plate is safe and reliable, and can stably and firmly install the capacitor on the circuit board.

Description

High-performance aluminum electrolytic capacitor cover plate

Technical Field

The utility model belongs to the technical field of aluminum electrolytic capacitor, especially, relate to a high performance aluminum electrolytic capacitor apron.

Background

With the continuous improvement of the capacitor performance, the aluminum electrolytic capacitor has been widely used in consumer electronics products, communication products, computers and peripheral products, new energy, automation control, automobile industry, photoelectric products, high speed railway, aviation and military equipment, etc. In the technical field of consumer electronics, along with structure transformation and technical progress, the aluminum electrolytic capacitor has the characteristics of small volume, large stored electricity and high cost performance, is expanded in various emerging fields such as energy-saving lamps, frequency converters, new energy sources and the like, and has an increasingly wide application range.

The capacitor cover plate is a main mounting and sealing part of a large-scale aluminum electrolytic capacitor, is generally formed by compounding a layer of temperature-resistant rubber and phenolic paper boards, and meets the requirements of a sealing material of an electrolytic capacitor by combining the excellent electrical insulation, mechanical property and chemical resistance of the phenolic paper boards with the excellent air tightness, moisture resistance and water resistance, electrical insulation, oil resistance and the like of the rubber. However, with the change of the function and design of the capacitor, many large-sized aluminum electrolytic capacitors and aluminum electrolytic capacitors with large axial diameter ratio are appeared at present, and for the capacitors of the type, when the capacitors are installed on a circuit board, particularly the aluminum electrolytic capacitors with large axial diameter ratio are installed on the circuit board in an upright manner, the problems of instable installation such as toppling easily occur. Along with the change of service time, the condition such as easily take place to empty and rock for the capacitor installation takes place to become flexible, and then influences the performance and the life of product.

Therefore, in view of the above problems in the prior art, it is necessary to develop and research a solution for stably and firmly mounting a capacitor on a circuit board.

The above background disclosure is only for the purpose of assisting understanding of the inventive concepts and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above contents are disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high performance aluminum electrolytic capacitor apron to solve at least one in the above-mentioned background art problem.

In order to achieve the above object, the embodiment of the present invention provides a technical solution that:

a high-performance aluminum electrolytic capacitor cover plate comprises a cover plate main body, a terminal component arranged on the cover plate main body and an explosion-proof valve; the terminal assembly comprises a positive electrode, a negative electrode, a positive lead-out terminal, a negative lead-out terminal, a metal rivet sheet and a current collecting electrode sheet, wherein the positive lead-out terminal and the negative lead-out terminal are led out corresponding to the positive electrode and the negative electrode; each leading-out terminal is bent in a horn shape, and the positive and negative leading-out terminals are respectively riveted on the positive and negative electrodes; the cover plate main body comprises a substrate, a rubber layer and an insulating layer, wherein the rubber layer and the insulating layer are respectively arranged on the upper surface of the substrate and the lower surface of the substrate.

In some embodiments, the insulating layer is in a disc shape, and an abutting surface abutting against the substrate surface is arranged at an edge of the insulating layer, and the abutting surface is a circular ring-shaped plane.

In some embodiments, the insulating layer is provided with a dome-shaped convex surface in an arc transition manner from the attaching surface to the center of the insulating layer, the edge of the convex surface is convex, and the middle of the convex surface is a concave plane.

In some embodiments, the plane of the recess and the abutting surface are at different levels, and when the insulating layer abuts on the surface of the substrate, a gap is formed between the substrate and the convex surface.

In some embodiments, two recessed through holes are symmetrically arranged on the recessed plane, and the bottom ends of the recessed through holes are provided with stopping portions.

In some embodiments, the stopping portion is designed in a circular ring shape, a bottom surface of the stopping portion and the attaching surface are located at the same horizontal plane, and when the insulating layer is attached to the surface of the substrate, the bottom surface of the stopping portion is simultaneously attached to the surface of the substrate.

In some embodiments, an isolation structure is disposed between the two recessed through holes, and the isolation structure protrudes out of the plane of the recess.

In some embodiments, the isolation structure includes an isolation trench and a wall structure, and the isolation trench is in a groove shape.

In some embodiments, the substrate is provided with a positive electrode lead-out hole and a negative electrode lead-out hole, and the concave through hole on the insulating layer corresponds to the positive electrode lead-out hole and the negative electrode lead-out hole.

In some embodiments, a fixing gasket is disposed at the bottom of the through hole on the insulating layer to fix the positive electrode and the negative electrode.

The utility model discloses technical scheme's beneficial effect is:

compared with the prior art, the high-performance aluminum electrolytic capacitor cover plate is safe and reliable, and can stably and firmly install the capacitor on the circuit board.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a structural diagram of a high-performance aluminum electrolytic capacitor cover plate according to an embodiment of the present invention.

Fig. 2 is another angle structure diagram of the cover plate of the high performance aluminum electrolytic capacitor according to an embodiment of the present invention.

Fig. 3 is a schematic view of another angle structure of a high performance aluminum electrolytic capacitor cover plate according to an embodiment of the present invention.

Fig. 4 is a schematic representation of an aluminum electrolytic capacitor using the cover plate of fig. 1.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the embodiments of the present invention more clearly understood, the technical solutions in the embodiments of the present invention can be better understood by those skilled in the art, and the drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" 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. The connection may be for fixation or for circuit connection.

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 used in the orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, unless explicitly stated or limited otherwise, "plurality" means two or more, and the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As an embodiment of the utility model, a high performance aluminum electrolytic capacitor apron is provided, it is convenient for firmly install the condenser on the circuit board steadily, takes place to empty, rock the not firm problem of installation such as wait when preventing that the condenser from installing on the circuit board, has improved the life and the security performance of condenser greatly.

Referring to fig. 1 to 3, a high performance aluminum electrolytic capacitor cover plate 100 according to an embodiment of the present invention includes a cover plate main body (not numbered), a terminal assembly (not numbered) mounted on the cover plate main body, and an explosion-proof valve (not shown); the terminal assembly comprises positive and negative electrodes 13, 14, positive and negative lead- out terminals 130, 140 led out corresponding to the positive and negative electrodes, a metal rivet sheet (not shown) and a current collector sheet (not shown); each leading-out terminal is bent in a horn shape, and the positive and negative leading-out terminals 130 and 140 are respectively riveted on the positive and negative electrodes 13 and 14.

Specifically, the cover plate main body is circular, and the leading-out terminals are bent towards the center of the cover plate main body. In some embodiments, the two lead terminals are riveted to the positive and negative electrodes 13, 14 in a staggered arrangement.

Specifically, the cover plate body comprises a substrate 10, a rubber layer 11 and an insulating layer 12, wherein the rubber layer 11 and the insulating layer 12 are respectively arranged on the upper surface and the lower surface of the substrate.

The rubber layer 11 is applied to the surface of the substrate to seal the capacitor, prevent the evaporation of liquid electrolyte in the capacitor and ensure that the capacitance and other electrical properties of the capacitor are not reduced. The material of the rubber layer depends on the electrolyte solvent of the capacitor, and in some embodiments, the material of the rubber layer may be fluororubber, butyl rubber, ethylene propylene diene monomer rubber, or a compound rubber of the two or three.

The thickness of the substrate 10 is greater than that of the rubber layer 11, and in some embodiments, the thickness h of the substrate is: h is more than or equal to 5mm and less than or equal to 8 mm; the material of the substrate is that epoxy resin is compounded with fiber texture density textile or papermaking; in some embodiments, the substrate is made of a low-chlorophenol resin material.

The insulating layer 12 is in a disc shape, and the edge of the insulating layer is provided with an attaching surface 120 attached to the surface of the substrate, wherein the attaching surface is a circular plane; a dome-shaped convex surface 121 is arranged in an arc transition mode from the attaching surface to the center of the insulating layer, the edge of the convex surface is convex, and a concave plane 122 is arranged in the middle of the convex surface; in one embodiment, the plane of the recess and the attaching surface are at different levels, so that when the insulating layer is attached to the surface of the substrate, a gap is formed between the substrate and the convex surface. Two sunken through holes 1220 are symmetrically arranged on the sunken plane, and the sunken through holes are gradually reduced from the sunken plane to the surface of the substrate, namely the aperture of each sunken through hole is gradually reduced from the sunken plane to the substrate. As an embodiment, the sunken through hole is obliquely contracted and gradually reduced from a sunken plane. The bottom end of the recessed through hole is provided with a stopping part (not shown), the stopping part is designed in a circular ring shape, the bottom surface of the stopping part and the binding surface are positioned on the same horizontal plane, and when the insulating layer is bound to the surface of the substrate, the bottom surface of the stopping part is simultaneously closely attached to the surface of the substrate.

An isolation structure 123 is disposed between the two recessed vias 1220, and the isolation structure protrudes from the recessed plane 122. In one embodiment, the isolation structure includes an isolation trench 1230 and a wall structure 1231, wherein the isolation trench is a trench. It is understood that, in other embodiments, the isolation structure can be adjusted correspondingly according to the arrangement of the pins of the capacitor terminal, and can be designed into any geometric structure with any shape, the structure of the isolation structure is not particularly limited in the present invention, and any structure that can achieve the corresponding function should belong to the protection scope of the present invention.

The substrate 10 is provided with positive and negative electrode lead-out holes (not shown), and the recessed through holes on the insulating layer correspond to the positive and negative electrode lead-out holes. The insulating layer is attached to the substrate, and the positive electrode and the negative electrode of the terminal assembly respectively penetrate through the concave through hole and the positive electrode lead-out hole and the negative electrode lead-out hole; the stop portion at the bottom end of the recessed through hole on the insulating layer is provided with a fixing gasket 15 so as to fix the positive electrode and the negative electrode, and the insulating layer and the substrate are connected and fixed through the positive electrode and the negative electrode. By the design, the positive electrode and the negative electrode are isolated by the isolating structure between the two sunken through holes, and the creepage local structures of the positive electrode and the negative electrode are differentiated, so that the creepage problem between the positive electrode and the negative electrode is solved, and the short circuit between the positive electrode and the negative electrode of the capacitor is prevented; and due to the special structural design of the insulating layer, after the insulating layer is attached and installed on the substrate, a gap is formed between the convex surface of the insulating layer and the surface of the substrate, and the isolating structure is provided with a groove-shaped isolating channel which is communicated with the gap, so that an effective explosion-proof effect can be achieved. In addition, through in set up sunken plane on the protruding face of insulating layer to and through the special design to sunken through-hole, when the apron is installed on aluminum electrolytic capacitor's aluminum hull, there is small space between insulating layer and the core package, in order to play the trace stock solution effect, during high temperature, a small amount of electrolyte of extruding can exist in covering the space. And secondly, the insulating layer is attached and installed on the substrate, so that the electrolyte in the core package of the aluminum electrolytic capacitor is prevented from leaking out to corrode the substrate, and the performance of the electrolytic capacitor is further influenced.

As an embodiment of the present invention, the insulating layer 12 is designed as an insulator, the insulator is made of engineering plastic, and the manufacturing process is hot stamping molding. In other embodiments, the insulating layer is a PET film with a thickness of 25um to 250 um; the PET film has high corrosion resistance to electrolyte and is not easy to corrode by the electrolyte.

It is understood that, in some embodiments, the insulating layer 12 may be designed to be embedded on the positive and negative electrode terminals, or directly sleeved on the positive and negative electrode terminals, so as to locally differentiate the creepage of the positive and negative electrodes, and at the same time, prevent the corrosive solution from corroding the substrate.

In one embodiment, the metal rivet (not shown) and the collector tab (not shown) of the terminal assembly are provided with punched holes (not shown). The cover plate is correspondingly provided with through holes (not shown), the leading-out terminals are arranged on the upper surface of the cover plate and correspond to the through holes, the current collecting electrode plates are arranged on the lower surface of the cover plate and correspond to the through holes, the positive electrodes and the negative electrodes penetrate through the leading-out terminal punched holes from top to bottom and penetrate through the through holes in the cover plate and the punched holes in the current collecting electrode plates, and the positive electrodes and the negative electrodes are tightly riveted with the current collecting electrode plates through metal riveting sheets.

Referring to fig. 4, according to another embodiment of the present invention, an aluminum electrolytic capacitor 200 is provided, which includes a case 201, a capacitor core package (not shown) mounted inside the case, a cover plate 100, and a terminal assembly (not shown) mounted on the cover plate. The core package comprises a core package main body formed by laminating and coaxially winding an electrolyte paper layer and an aluminum foil; the cover plate comprises a cover plate main body, a terminal component arranged on the cover plate main body and an explosion-proof valve; the cover plate main body is circular and comprises a base plate, a rubber layer and an insulating layer, wherein the rubber layer and the insulating layer are respectively arranged on the upper surface and the lower surface of the base plate.

The rubber layer is pasted on the surface of the substrate to seal the capacitor, prevent the evaporation of liquid electrolyte in the capacitor and ensure that the capacitance and other electrical properties of the capacitor are not reduced.

The insulating layer is disc-shaped, the edge of the insulating layer is provided with an attaching surface attached to the surface of the substrate, and the attaching surface is a circular plane; a dome-shaped convex surface is arranged in an arc transition manner from the attaching surface to the center of the insulating layer, the edge of the convex surface is convex, and the middle of the convex surface is a concave plane; in one embodiment, the plane of the recess and the attaching surface are at different levels, so that when the insulating layer is attached to the surface of the substrate, a gap is formed between the substrate and the convex surface. Two sunken through holes are symmetrically arranged on the sunken plane, and the sunken through holes are gradually reduced from the sunken plane to the surface of the substrate, namely the aperture of each sunken through hole is gradually reduced from the sunken plane to the substrate. As an embodiment, the sunken through hole is obliquely contracted and gradually reduced from a sunken plane. The bottom end of the concave through hole is provided with a stopping part, the stopping part is designed in a circular ring shape, the bottom surface of the stopping part and the binding surface are in the same horizontal plane, and when the insulating layer is bound to the surface of the substrate, the bottom surface of the stopping part is simultaneously closely attached to the surface of the substrate.

The terminal assembly further comprises a leading-out terminal, a metal rivet sheet and a current collecting electrode sheet. And the leading-out terminal, the metal rivet sheet and the current collecting electrode sheet are provided with punched holes. The cover plate is correspondingly provided with through holes, the leading-out terminals are arranged on the upper surface of the cover plate and correspond to the through holes, the current collecting electrode plate is arranged on the lower surface of the cover plate and corresponds to the through holes, the positive electrodes and the negative electrodes penetrate through the leading-out terminals from top to bottom and penetrate through the through holes in the cover plate and the punched holes in the current collecting electrode plate, and the positive electrodes and the negative electrodes are tightly riveted with the current collecting electrode plate through metal riveting sheets.

The top of the core package main body is provided with a cathode guide foil leading-out strip and an anode guide foil leading-out strip; the aluminum foil layer comprises a negative aluminum foil layer and a positive aluminum foil layer, wherein the negative lead foil leading strip is led out of the negative aluminum foil layer; and the anode guide foil leading-out strip is led out of the anode aluminum foil layer. The electrolytic paper layer is arranged between the negative electrode aluminum foil layer and the positive electrode aluminum foil layer. The extraction electrode comprises a cathode extraction electrode and an anode extraction electrode; the current collecting electrode slice comprises a cathode current collecting electrode slice and an anode current collecting electrode slice corresponding to the cathode extraction electrode and the anode extraction electrode; one or more cathode guide foil leading-out strips of the core package are collected together and connected with a cathode current collecting electrode plate; correspondingly, the core package comprises one or more anode guide foil leading-out strips, and all the anode guide foil leading-out strips are gathered together and connected with the anode current collecting electrode plate.

It is to be understood that the foregoing is a more detailed description of the invention, and specific embodiments thereof are described in conjunction with the detailed description, which is not intended to limit the invention to the particular forms disclosed. For those skilled in the art to which the invention pertains, several alternatives or modifications can be made to the described embodiments without departing from the inventive concept, and these alternatives or modifications should be construed as belonging to the scope of the present patent. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like, mean 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 invention.

In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention 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 of the invention as defined by the appended claims.

Moreover, 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. One of ordinary skill in the art will readily appreciate that the above-disclosed, presently existing or later to be developed, processes, machines, manufacture, compositions of matter, means, methods, or steps, 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. A high-performance aluminum electrolytic capacitor cover plate is characterized by comprising a cover plate main body, a terminal component arranged on the cover plate main body and an explosion-proof valve; the terminal assembly comprises a positive electrode, a negative electrode, a positive lead-out terminal, a negative lead-out terminal, a metal rivet sheet and a current collecting electrode sheet, wherein the positive lead-out terminal and the negative lead-out terminal are led out corresponding to the positive electrode and the negative electrode; each leading-out terminal is bent in a horn shape, and the positive and negative leading-out terminals are respectively riveted on the positive and negative electrodes; the cover plate main body comprises a substrate, a rubber layer and an insulating layer, wherein the rubber layer and the insulating layer are respectively arranged on the upper surface of the substrate and the lower surface of the substrate.

2. The high performance aluminum electrolytic capacitor cover plate of claim 1, wherein: the insulating layer is disc-shaped, and the edge of the insulating layer is provided with a binding surface which is bound with the surface of the substrate, wherein the binding surface is a circular ring-shaped plane.

3. The high performance aluminum electrolytic capacitor cover plate of claim 2, wherein: the insulating layer is provided with a dome-shaped convex surface in an arc transition mode from the attaching surface to the center of the insulating layer, the edge of the convex surface is convex, and the middle of the convex surface is a concave plane.

4. The high performance aluminum electrolytic capacitor cover plate of claim 3, wherein: the concave plane and the binding surface are in different horizontal planes, and when the insulating layer is bound to the surface of the substrate, a gap is formed between the substrate and the convex surface.

5. The high performance aluminum electrolytic capacitor cover plate of claim 4, wherein: two sunken through holes are symmetrically arranged on the sunken plane, and stopping portions are arranged at the bottom ends of the sunken through holes.

6. The high performance aluminum electrolytic capacitor cover plate of claim 5, wherein: the stopping part is designed in a circular ring shape, the bottom surface of the stopping part and the binding surface are positioned on the same horizontal plane, and when the insulating layer is bound to the surface of the substrate, the bottom surface of the stopping part is simultaneously attached to the surface of the substrate.

7. The high performance aluminum electrolytic capacitor cover plate of claim 6, wherein: an isolation structure is arranged between the two sunken through holes and protrudes out of the sunken plane.

8. The high performance aluminum electrolytic capacitor cover plate of claim 7, wherein: the isolation structure comprises an isolation channel and a wall structure, and the isolation channel is in a groove shape.

9. The high performance aluminum electrolytic capacitor cover plate of claim 8, wherein: the substrate is provided with a positive electrode lead-out hole and a negative electrode lead-out hole, and the concave through hole in the insulating layer corresponds to the positive electrode lead-out hole and the negative electrode lead-out hole.

10. The high performance aluminum electrolytic capacitor cover plate of claim 9, wherein: and the stop part at the bottom end of the sunken through hole on the insulating layer is provided with a fixed gasket to fix the positive electrode and the negative electrode.

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