CN213303920U - Soldering lug formula condenser apron - Google Patents

Abstract

The utility model discloses a soldering lug type 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 an electrode, a leading-out terminal, a metal rivet sheet and a current collecting electrode sheet; the leading-out terminal is L-shaped and comprises a riveting part and a welding sheet formed by bending and extending the riveting part; the welding sheet is provided with a U-shaped welding part to increase the contact area between the welding part and the soldering tin. The utility model discloses soldering lug formula condenser apron can promote soldering tin position when installing on the circuit board, improves welded fastness can, and takes place the mistake and insert the incident when can preventing to install.

Description

Soldering lug formula condenser apron

Technical Field

The utility model belongs to the technical field of aluminium electrolytic capacitor, especially, relate to a soldering lug formula capacitor cover plate.

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 aluminum electrolytic capacitors are generally mounted on a circuit board by welding positive and negative lead-out terminals on a cover plate. However, a high-current capacitor has a relatively high soldering requirement, and a solder position and erroneous insertion prevention at the time of mounting are both considered.

Therefore, in order to solve the above problems in the prior art, it is necessary to develop and research to provide a solution for facilitating the installation and use of the aluminum electrolytic capacitor.

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 soldering lug formula condenser apron to solve at least one among 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 welding piece type 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 an electrode, a leading-out terminal, a metal rivet sheet and a current collecting electrode sheet; the leading-out terminal is L-shaped and comprises a riveting part and a welding sheet formed by bending and extending the riveting part; the welding sheet is provided with a U-shaped welding part to increase the contact area between the welding part and the soldering tin.

In some embodiments, the leading-out terminal is integrally formed, the riveting portion is provided with a riveting hole, the electrode is riveted and fixed with the leading-out terminal through the riveting hole, and the welding piece is perpendicular to the riveting portion.

In some embodiments, the electrode comprises a positive electrode and a negative electrode, and the leading-out terminal comprises a positive leading-out terminal and a negative leading-out terminal corresponding to the positive electrode and the negative electrode; the riveting parts of the positive leading-out terminal and the negative leading-out terminal are arranged in a mutually vertical mode, and the planes of the welding sheets of the positive leading-out terminal and the negative leading-out terminal are mutually orthogonal.

In some embodiments, the cover plate body is circular, the positive and negative electrodes are installed at the center of the cover plate, and the two welding sheets of the positive and negative leading-out terminals are respectively located on different planes.

In some embodiments, the cover plate body includes a substrate, a rubber layer and an insulating layer respectively disposed on an upper surface of the substrate and a lower surface of the substrate.

In some embodiments, the rubber layer is attached to the surface of the substrate, and the material of the rubber layer is fluororubber, butyl rubber or ethylene propylene diene monomer.

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, two recessed through holes are symmetrically arranged on the recessed plane, and an isolation structure is arranged between the two recessed through holes and protrudes out of the recessed plane.

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.

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

compared with the prior art, the utility model discloses can promote soldering tin position when welding piece formula condenser apron is installed, improve welded fastness can, and take place the mistake and insert the incident when can preventing to install.

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 schematic diagram of a solder tab type capacitor cover plate according to an embodiment of the present invention.

Fig. 2 is a diagram of another angular configuration of a tab capacitor cover plate in accordance with an embodiment of the present invention.

Fig. 3 is a diagram of yet another angular configuration of a tab capacitor cover plate in accordance with an embodiment of the present invention.

Fig. 4 is a schematic representation of a solder-on chip 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.

Referring to fig. 1 to 3, a tab-type 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 includes electrodes 13, 14, lead-out terminals 130, 140, metal rivet pieces (not shown), and current collector pieces (not shown); the leading- out terminals 130, 140 are L-shaped, and include riveting portions 1300, 1400, and welding pieces 1301, 1401 formed by bending and extending the riveting portions; the U-shaped welding parts 1302 and 1402 are arranged on the welding pieces, and the U-shaped welding parts are arranged to be U-shaped structures, so that the contact area between the welding parts and soldering tin can be increased during welding, and the electrical performance of the leading-out terminal is improved. In this embodiment, the leading-out terminal is integrally formed, the riveting portion is provided with a riveting hole, the electrode is riveted and fixed with the leading-out terminal through the riveting hole, and the welding piece is perpendicular to the riveting portion.

The electrodes comprise positive and negative electrodes 13, 14, and the leading terminals comprise positive and negative leading terminals 130, 140 corresponding to the positive and negative electrodes. The positive and negative leading-out terminals are riveted with the positive and negative electrodes through riveting holes (not numbered) on the riveting part respectively. In this embodiment, the caulking portions 1300, 1400 of the positive and negative lead terminals are disposed perpendicular to each other, and the planes of the welding pieces 1301, 1401 of the positive and negative lead terminals are perpendicular to each other. Through such setting, can prevent during the installation the misplug of positive, negative leading-out terminal, can play the effect of preventing slow-witted.

Specifically, the cover plate main body is circular, the positive electrode and the negative electrode are arranged at the center of the cover plate, the positive leading-out terminal 130 and the negative leading-out terminal 140 are vertically arranged, and two welding sheets of the positive leading-out terminal and the negative leading-out terminal are respectively positioned on different planes. It is understood that, in some embodiments, the positive and negative leading-out terminals may also be disposed in parallel side by side, or the positive and negative leading-out terminals may also be disposed in opposite directions, and the positive and negative leading-out terminals constitute a concave shape, which is not particularly limited in the embodiments of the present invention, and the present invention should fall within the protection scope of the present invention no matter what kind of manner is adopted, as long as the theme idea of the present invention is not departed.

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, the edge of the insulating layer 12 is provided with an attaching surface 120 attached to the surface of the substrate, and the attaching surface is a circular ring-shaped 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 arranged between the two recessed through holes, and the isolation structure 123 protrudes out of 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 is provided with a positive electrode lead-out hole and a negative electrode lead-out hole (not shown), and the sunken through holes on the insulating layer correspond to the positive electrode lead-out hole and the negative electrode lead-out hole. 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 tabs and collector tabs of the terminal assemblies are provided with punched holes (not shown). 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 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, as another embodiment of the present invention, a tab capacitor 200 is further 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 numbered) 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 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 insulating layer 12 is in a disc shape, 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 includes lead-out terminals 130, 140, metal rivet pieces, and collector electrode pieces. And the leading-out terminal, the metal rivet sheet and the current collecting electrode sheet are provided with punched holes. The cover plate 100 is correspondingly provided with a through hole, the leading-out terminal is arranged on the upper surface of the cover plate and corresponds to the through hole, the current collecting electrode plate is arranged on the lower surface of the cover plate and corresponds to the through hole, the positive electrode and the negative electrode penetrate through the leading-out terminal from top to bottom and penetrate through the through hole in the cover plate and the punched hole in the current collecting electrode plate, and the positive electrode and the negative electrode are tightly riveted with the current collecting electrode plate through the metal rivet.

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 welding piece type 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 an electrode, a leading-out terminal, a metal rivet sheet and a current collecting electrode sheet; the leading-out terminal is L-shaped and comprises a riveting part and a welding sheet formed by bending and extending the riveting part; the welding sheet is provided with a U-shaped welding part to increase the contact area between the welding part and the soldering tin.

2. The solder paddle capacitor lid of claim 1, wherein: the leading-out terminal is integrally formed, a riveting hole is formed in the riveting portion, the electrode is fixedly riveted with the leading-out terminal through the riveting hole, and the welding piece is perpendicular to the riveting portion.

3. The solder paddle capacitor lid of claim 2, wherein: the electrode comprises a positive electrode and a negative electrode, and the leading-out terminal comprises a positive leading-out terminal and a negative leading-out terminal corresponding to the positive electrode and the negative electrode; the riveting parts of the positive leading-out terminal and the negative leading-out terminal are arranged in a mutually vertical mode, and the planes of the welding sheets of the positive leading-out terminal and the negative leading-out terminal are mutually orthogonal.

4. The solder paddle capacitor lid of claim 3, wherein: the cover plate main body is circular, the positive electrode and the negative electrode are arranged at the center of the cover plate, and the two welding sheets of the positive leading-out terminal and the negative leading-out terminal are respectively positioned on different planes.

5. The solder paddle capacitor lid of claim 4, wherein: 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.

6. The solder paddle capacitor lid of claim 5, wherein: the rubber layer is pasted on the surface of the substrate and is made of fluororubber, butyl rubber and ethylene propylene diene monomer.

7. The solder paddle capacitor lid of claim 6, 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.

8. The solder paddle capacitor lid of claim 7, 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.

9. The solder paddle capacitor lid of claim 8, wherein: two sunken through holes are symmetrically arranged on the sunken plane, an isolation structure is arranged between the two sunken through holes, and the isolation structure protrudes out of the sunken plane.

10. The solder paddle capacitor lid of claim 9, 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.

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