An aluminum electrolytic capacitor terminal assembly and a manufacturing method thereof

Abstract

This invention discloses an aluminum electrolytic capacitor terminal assembly and its manufacturing method, comprising a lead-out metal pin, an insulating rubber base, and a metal sleeve; wherein, the insulating rubber base is disposed between the lead-out metal pin and the metal sleeve to insulate the lead-out metal pin from the metal sleeve; the lead-out metal pin includes a CP lead, an aluminum stem, and a welding base; the metal sleeve is welded to the cover plate of the aluminum electrolytic capacitor. The aluminum electrolytic capacitor terminal assembly of this invention is securely mounted on the cover plate of the aluminum electrolytic capacitor by welding the metal sleeve to the cover plate.

Description

Technical Field

[0001] This invention belongs to the field of capacitor technology, and particularly relates to an aluminum electrolytic capacitor terminal assembly and its manufacturing method. Background Technology

[0002] With the continuous improvement of capacitor performance, aluminum electrolytic capacitors have been widely used in consumer electronics, communication products, computers and peripherals, new energy, automation control, automotive industry, optoelectronic products, high-speed rail, aviation and military equipment, etc. In the field of consumer electronics technology, with structural transformation and technological progress, aluminum electrolytic capacitors, with their characteristics of small size, large energy storage capacity and high cost performance, have expanded into many emerging fields such as energy-saving lamps, frequency converters, and new energy, and their application range is becoming increasingly wide.

[0003] Currently, most aluminum electrolytic capacitors have bolt terminals, solder pad terminals, or horn-shaped terminals. These terminals are mounted on circuit boards or electrically connected to other components via soldering, plugging, or other methods. The capacitor's cover plate has terminal holes on the substrate, and the terminals pass through these holes and are fixed to the cover plate by a rubber layer. For example, Chinese Patent No. 201921594028.7 uses a pin-type terminal structure, where the terminals are mounted and fixed to the cover plate through through holes.

[0004] However, the aforementioned lead-out terminals have many defects; they are not secure or strong enough when installed on the cover plate.

[0005] Therefore, it is necessary to conduct research and development to provide a solution and a robust aluminum electrolytic capacitor terminal assembly, in light of the existing technology.

[0006] The above background information is provided only to aid in understanding the inventive concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0007] The purpose of this invention is to provide an aluminum electrolytic capacitor terminal assembly and its manufacturing method to solve at least one of the problems mentioned above in the background art.

[0008] To achieve the above objectives, the technical solution of this invention is implemented as follows:

[0009] An aluminum electrolytic capacitor terminal assembly includes a lead-out metal pin, an insulating rubber base, and a metal sleeve; wherein the insulating rubber base is disposed between the lead-out metal pin and the metal sleeve to insulate the lead-out metal pin from the metal sleeve; the lead-out metal pin includes a CP lead, an aluminum stem, and a welding base; the metal sleeve is welded to the cover plate of the aluminum electrolytic capacitor.

[0010] In some embodiments, the CP lead of the metal guide pin and the aluminum stem are circular strips; wherein the diameter of the aluminum stem is larger than the diameter of the CP lead, and the length of the CP lead is greater than the length of the aluminum stem.

[0011] In some embodiments, the welding base is disc-shaped and is welded to the cell of the aluminum electrolytic capacitor.

[0012] In some embodiments, the insulating rubber seat includes a cylindrical sleeve and a circular base, and the center of the insulating rubber seat is provided with a through hole that mates with the aluminum rod.

[0013] In some embodiments, the outer diameter of the aluminum rod is adapted to the inner diameter of the through hole, so that the aluminum rod can be tightly fitted inside the through hole; the length of the through hole is greater than the length of the aluminum rod; and the diameter of the cylindrical sleeve is smaller than the diameter of the circular base.

[0014] In some embodiments, the metal sleeve is fitted onto the surface of the cylindrical sleeve of the insulating rubber seat; the inner diameter of the metal sleeve is adapted to the outer diameter of the cylindrical sleeve, and the length of the metal sleeve is greater than the length of the cylindrical sleeve.

[0015] In some embodiments, one end of the metal sleeve is low to the circular base of the insulating rubber seat, and the other end is fastened to the cylindrical sleeve of the insulating rubber seat by a rolled edge.

[0016] In some embodiments, the welding base for leading out the metal guide pin is provided with an annular protrusion on its upper surface, and an annular groove is formed between the annular protrusion and the bottom of the aluminum rod.

[0017] Another technical solution of the present invention is:

[0018] A method for manufacturing an aluminum electrolytic capacitor terminal assembly, comprising:

[0019] An insulating rubber base is provided, and a through hole is provided in the center of the insulating rubber base;

[0020] Provide an outgoing metal guide pin, and install the outgoing metal guide pin on the insulating rubber base by passing it through the through hole;

[0021] A metal sleeve is provided, which is then fitted onto the surface of an insulating rubber base. The metal sleeve is then waisted, and one end of the metal sleeve is rolled to secure it tightly to the insulating rubber base. Simultaneously, the insulating rubber base is compressed to fix the lead-out metal guide pin.

[0022] In some embodiments, it also includes:

[0023] A circular protrusion is provided on the upper surface of the metal guide pin welding base, and an annular groove is formed between the circular protrusion and the bottom of the aluminum rod.

[0024] The beneficial effects of the technical solution of this invention are:

[0025] Compared with the prior art, the aluminum electrolytic capacitor terminal assembly and its manufacturing method of the present invention are made by welding a metal sleeve to the cover plate of the aluminum electrolytic capacitor, thereby making the terminal assembly firmly installed on the cover plate of the aluminum electrolytic capacitor. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of an aluminum electrolytic capacitor terminal assembly according to an embodiment of the present invention;

[0028] Figure 2 This is a three-dimensional structural diagram of an aluminum electrolytic capacitor terminal assembly according to an embodiment of the present invention from another angle;

[0029] Figure 3 This is an exploded perspective view of an aluminum electrolytic capacitor terminal assembly according to an embodiment of the present invention;

[0030] Figure 4 This is a cross-sectional view of an aluminum electrolytic capacitor terminal assembly according to an embodiment of the present invention;

[0031] Figure 5 This is a partial cross-sectional view of an aluminum electrolytic capacitor terminal assembly according to an embodiment of the present invention from another angle;

[0032] Figure 6 This is a partial cross-sectional view of the lead-out metal pins of an aluminum electrolytic capacitor terminal assembly according to an embodiment of the present invention.

[0033] Figure 7 This is a flowchart illustrating a method for manufacturing an aluminum electrolytic capacitor terminal assembly according to another embodiment of the present invention. Detailed Implementation

[0034] To make the technical problems, technical solutions, and beneficial effects of the embodiments of the present invention clearer and more understandable, and to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0035] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, unless otherwise expressly specified and limited, "a plurality of" means two or more. Terms such as "installed," "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] Reference Figures 1-6As shown in the figure, as an embodiment of the present invention, an aluminum electrolytic capacitor terminal assembly 400 is provided, including a lead-out metal pin 40, an insulating rubber seat 41, and a metal sleeve 42; wherein, the insulating rubber seat 41 is disposed between the lead-out metal pin 40 and the metal sleeve 42 to insulate the lead-out metal pin 40 and the metal sleeve 42; the lead-out metal pin 40 includes a CP lead 401, an aluminum stem 402, and a welding base 403; the metal sleeve is welded to the cover plate of the aluminum electrolytic capacitor.

[0039] In this embodiment of the invention, the CP lead 401 and aluminum stem 402 of the metal lead are circular strips, wherein the diameter of the aluminum stem 402 is larger than the diameter of the CP lead 401, and the length of the CP lead 401 is larger than the length of the aluminum stem 402; the welding base 403 is disc-shaped and is welded to the cell (not shown) of the aluminum electrolytic capacitor.

[0040] Reference Figure 3 , Figure 4 , Figure 5 As shown, the insulating rubber seat 41 includes a cylindrical sleeve 410 and a circular base 411. The insulating rubber seat 41 has a through hole 412 at its center, which mates with the aluminum stem 402 of the metal guide needle. The outer diameter of the aluminum stem 402 matches the inner diameter of the through hole 412, allowing the aluminum stem 402 to be tightly fitted 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 cylindrical sleeve 410 is smaller than the diameter of the circular base 411. The circular base 411 of the insulating rubber seat 41 abuts against the welding base 403 of the metal guide needle 40.

[0041] The metal sleeve 42 is fitted onto the surface of the cylindrical sleeve 410 of the insulating rubber seat 41. Corresponding to the cylindrical sleeve 410, the metal sleeve 42 is cylindrical, and the inner diameter of the metal sleeve 42 matches the outer diameter of the cylindrical sleeve 410. The length of the metal sleeve 42 is greater than the length of the cylindrical sleeve 410. After the metal sleeve 42 is fitted onto the surface of the cylindrical sleeve 410, it is waisted. One end of the metal sleeve 42 is low to the circular base 411 of the insulating rubber seat 41, and the other end is fastened to the cylindrical sleeve 410 of the insulating rubber seat 41 by a rolled edge. In some embodiments, the metal sleeve 42 is an aluminum tube.

[0042] Reference Figure 3 , Figure 6As shown, in some embodiments, the upper surface of the welding base 403 of the metal guide needle 40 is provided with an annular protrusion 404, and an annular groove 405 is formed between the annular protrusion 404 and the bottom of the aluminum rod. This design causes the insulating rubber seat 41 to be squeezed when the metal sleeve 42 is waisted. The circular base 411 of the insulating rubber seat 41 is squeezed and embedded into the annular groove 405. At the same time, the annular protrusion 404 is squeezed and embedded into the circular base 411 of the insulating rubber seat 41, thereby making the insulating rubber seat 41 and the metal guide needle 40 tightly bonded together.

[0043] It is understood that in some embodiments, the lead-out metal guide pin may also be a strip of other irregular shapes. This embodiment does not impose any particular restrictions. Regardless of the shape, as long as it does not depart from the spirit of this application, it should fall within the protection scope of this application.

[0044] Reference Figure 7 As shown, another embodiment of the present invention is a method for manufacturing an aluminum electrolytic capacitor terminal assembly, comprising:

[0045] An insulating rubber base is provided, and a through hole is provided in the center of the insulating rubber base;

[0046] Provide an outgoing metal guide pin, and install the outgoing metal guide pin on the insulating rubber base by passing it through the through hole;

[0047] A metal sleeve is provided, which is then fitted onto the surface of an insulating rubber base. The metal sleeve is then waisted, and one end of the metal sleeve is rolled to secure it tightly to the insulating rubber base. Simultaneously, the insulating rubber base is compressed to fix the lead-out metal guide pin.

[0048] In some embodiments, it also includes:

[0049] A circular protrusion is provided on the upper surface of the lead-out metal guide pin welding base, and an annular groove is formed between the circular protrusion and the bottom of the aluminum rod. When the metal sleeve is tightened, the insulating rubber seat is squeezed, and the circular base of the insulating rubber seat is squeezed and embedded into the annular groove. At the same time, the circular protrusion is squeezed and embedded into the circular base of the insulating rubber seat, so that the insulating rubber seat and the lead-out metal guide pin are tightly combined.

[0050] It is understood that the above description is a further detailed explanation of the invention in conjunction with specific / preferred embodiments, and it should not be considered that the specific implementation of the invention is limited to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the inventive concept, and all such substitutions or modifications should be considered within the scope of protection of this patent. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the invention.

[0051] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of different embodiments or examples, without contradiction. Although embodiments of the invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the scope defined by the appended claims.

[0052] Furthermore, the scope of this invention is not intended to be limited to the specific embodiments of the processes, machines, manufactures, compositions of matter, means, methods, and steps described in the specification. Those skilled in the art will readily understand that existing or later-developed disclosures, processes, machines, manufactures, compositions of matter, means, methods, or steps that perform substantially the same function as the corresponding embodiments described herein or obtain substantially the same results as the embodiments described herein can be utilized. Therefore, the appended claims are intended to include such processes, machines, manufactures, compositions of matter, means, methods, or steps within their scope.

Claims

1. A terminal assembly for an aluminum electrolytic capacitor, characterized in that: The device includes a lead-out metal pin, an insulating rubber base, and a metal sleeve. The insulating rubber base is disposed between the lead-out metal pin and the metal sleeve to provide insulation between them. The lead-out metal pin includes a CP lead, an aluminum stem, and a welding base. The metal sleeve is welded to the cover plate of an aluminum electrolytic capacitor. The insulating rubber base includes a cylindrical sleeve and a circular base. The center of the insulating rubber base has a through hole that mates with the aluminum stem. One end of the metal sleeve abuts against the circular base of the insulating rubber base, and the other end is secured to the cylindrical sleeve of the insulating rubber base by a rolled edge.

2. The aluminum electrolytic capacitor terminal assembly as described in claim 1, characterized in that: The CP lead wire of the metal guide pin and the aluminum stem are circular strips; wherein the diameter of the aluminum stem is larger than the diameter of the CP lead wire, and the length of the CP lead wire is larger than the length of the aluminum stem.

3. The aluminum electrolytic capacitor terminal assembly as described in claim 1, characterized in that: The welding base is disc-shaped and is welded to the cell of the aluminum electrolytic capacitor.

4. The aluminum electrolytic capacitor terminal assembly as described in claim 2, characterized in that: The outer diameter of the aluminum rod is adapted to the inner diameter of the through hole, so that the aluminum rod can be tightly fitted inside the through hole; the length of the through hole is greater than the length of the aluminum rod; the diameter of the cylindrical sleeve is smaller than the diameter of the circular base.

5. The aluminum electrolytic capacitor terminal assembly as described in claim 1, characterized in that: The metal sleeve is fitted onto the surface of the cylindrical sleeve of the insulating rubber seat; the inner diameter of the metal sleeve is matched with the outer diameter of the cylindrical sleeve, and the length of the metal sleeve is greater than the length of the cylindrical sleeve.

6. The aluminum electrolytic capacitor terminal assembly as described in claim 1, characterized in that: The upper surface of the welding base for the lead-out metal needle is provided with an annular protrusion, and an annular groove is formed between the annular protrusion and the bottom of the aluminum rod.

7. A method for manufacturing an aluminum electrolytic capacitor terminal assembly as described in any one of claims 1-6, characterized in that, include: An insulating rubber base is provided, and a through hole is provided in the center of the insulating rubber base; Provide an outgoing metal guide pin, and install the outgoing metal guide pin on the insulating rubber base by passing it through the through hole; A metal sleeve is provided, which is then fitted onto the surface of an insulating rubber base. The metal sleeve is then waisted, and one end of the metal sleeve is rolled to secure it tightly to the insulating rubber base. Simultaneously, the insulating rubber base is compressed to fix the lead-out metal guide pin.

8. The method for manufacturing the aluminum electrolytic capacitor terminal assembly as described in claim 7, characterized in that, Also includes: A circular protrusion is provided on the upper surface of the metal guide pin welding base, and an annular groove is formed between the circular protrusion and the bottom of the aluminum rod.

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