CN-116525303-B - Aluminum electrolytic capacitor terminal assembly and manufacturing method thereof

CN116525303BCN 116525303 BCN116525303 BCN 116525303BCN-116525303-B

Abstract

The invention discloses an aluminum electrolytic capacitor terminal assembly and a manufacturing method thereof, wherein the aluminum electrolytic capacitor terminal assembly comprises an outgoing metal guide pin, an insulating rubber seat and a metal sleeve; the insulation rubber seat is arranged between the lead-out metal guide pin and the metal sleeve so as to insulate the lead-out metal guide pin from the metal sleeve, the lead-out metal guide pin comprises a CP lead, an aluminum stem and a welding base, and the metal sleeve is welded on a cover plate of the aluminum electrolytic capacitor. The terminal assembly of the aluminum electrolytic capacitor is welded on the cover plate of the aluminum electrolytic capacitor through the metal sleeve, so that the terminal assembly is firmly installed on the cover plate of the aluminum electrolytic capacitor.

Inventors

YIN ZHIHUA
LI LIANG
YIN CHAO

Assignees

深圳江浩电子有限公司

Dates

Publication Date: 20260505
Application Date: 20230505

Claims (8)

1. The aluminum electrolytic capacitor terminal assembly is characterized by comprising an outgoing metal guide pin, an insulating rubber seat and a metal sleeve, wherein the insulating rubber seat is arranged between the outgoing metal guide pin and the metal sleeve so as to insulate the outgoing metal guide pin from the metal sleeve, the outgoing metal guide pin comprises a CP lead, an aluminum stem and a welding base, the metal sleeve is welded on a cover plate of an aluminum electrolytic capacitor, the insulating rubber seat comprises a cylindrical sleeve and a circular chassis, a through hole matched with the aluminum stem is formed in the center of the insulating rubber seat, one end of the metal sleeve is abutted against the circular chassis of the insulating rubber seat, and the other end of the metal sleeve is buckled with the cylindrical sleeve of the insulating rubber seat through a curled edge.
2. The aluminum electrolytic capacitor terminal assembly as recited in claim 1, wherein the CP lead from which the metal lead is led and the aluminum stem are in a circular strip shape, wherein the diameter of the aluminum stem is larger than the diameter of the CP lead and the length of the CP lead is longer than the length of the aluminum stem.
3. The terminal assembly of claim 1, wherein the weld base has a disk shape and is welded to the cell of the aluminum electrolytic capacitor by the weld base.
4. The aluminum electrolytic capacitor terminal assembly as recited in claim 2, wherein the outer diameter of the aluminum stem is adapted to the inner diameter of the through hole so that the aluminum stem can be closely sleeved inside the through hole, the length of the through hole is larger than the length of the aluminum stem, and the diameter of the cylindrical sleeve is smaller than the diameter of the circular chassis.
5. The aluminum electrolytic capacitor terminal assembly as recited in claim 1, wherein the metal sleeve is sleeved on 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 larger than that of the cylindrical sleeve.
6. The aluminum electrolytic capacitor terminal assembly as recited in claim 1, wherein the upper surface of the welding base of the lead-out metal lead is provided with a circular protruding strip, and an annular groove is formed between the circular protruding strip and the bottom of the aluminum stem.
7. A method of manufacturing the aluminum electrolytic capacitor terminal assembly according to any one of claims 1 to 6, comprising: providing an insulating rubber seat, and arranging a through hole in the center of the insulating rubber seat; providing a lead-out metal guide pin, and mounting the lead-out metal guide pin on the insulating rubber seat through a through hole of the insulating rubber seat; Providing a metal sleeve, sleeving the metal sleeve on the surface of the insulating rubber seat, binding the metal sleeve, and curling one end of the metal sleeve so as to tightly fix the metal sleeve on the insulating rubber seat, and simultaneously extruding the insulating rubber seat to fix the leading-out metal guide pin.
8. The method of manufacturing an aluminum electrolytic capacitor terminal assembly as recited in claim 7, further comprising: the upper surface of the welding base of the lead-out metal guide pin is provided with a circular protruding strip, and an annular groove is formed between the circular protruding strip and the bottom of the aluminum stem.

Description

Aluminum electrolytic capacitor terminal assembly and manufacturing method thereof Technical Field The invention belongs to the technical field of capacitors, and particularly relates to an aluminum electrolytic capacitor terminal assembly and a manufacturing method thereof. 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, the leading-out terminals of most aluminum electrolytic capacitors are generally bolt terminals, soldering tab terminals or ox horn leading-out terminals, and are welded, inserted or otherwise installed on a circuit board or electrically connected with other devices through the leading-out terminals, wherein a terminal hole is formed in a base plate of the aluminum electrolytic capacitor, and the terminal penetrates through the terminal hole and is fixed on the base plate through rubber layer extrusion. For example, in chinese patent No. 201921594028.7, the lead-out terminal is a lead pin structure, and the terminal is fixed on the cover plate through a through hole on the cover plate of the capacitor. However, the above-mentioned prior art lead-out terminals have a number of drawbacks, in that the terminals are not strong enough and not strong enough when mounted on the cover plate. It is seen that there is a need in the art for a solution to provide a robust aluminum electrolytic capacitor terminal assembly. The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present application 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 application 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 invention aims to provide an aluminum electrolytic capacitor terminal assembly and a manufacturing method thereof, which are used for solving at least one of the problems in the background technology. In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows: The terminal assembly of the aluminum electrolytic capacitor comprises an outgoing metal guide pin, an insulating rubber seat and a metal sleeve, wherein the insulating rubber seat is arranged between the outgoing metal guide pin and the metal sleeve so as to insulate the outgoing metal guide pin from the metal sleeve, the outgoing metal guide pin comprises a CP lead, an aluminum stem and a welding base, and the metal sleeve is welded on a cover plate of the aluminum electrolytic capacitor. In some embodiments, the CP lead out of the metal lead and the aluminum stem are in a circular strip shape, wherein the diameter of the aluminum stem is larger than the diameter of the CP lead, and the length of the CP lead is larger than the length of the aluminum stem. In some embodiments, the welding base is disc-shaped and is welded to the cell of the aluminum electrolytic capacitor through the welding base. In some embodiments, the insulating rubber seat comprises a cylindrical sleeve and a circular chassis, and a through hole matched with the aluminum stem is arranged in the center of the insulating rubber seat. In some embodiments, the outer diameter of the aluminum stem is matched with the inner diameter of the through hole, so that the aluminum stem can be tightly sleeved inside the through hole, the length of the through hole is larger than that of the aluminum stem, and the diameter of the cylindrical sleeve is smaller than that of the circular chassis. In some embodiments, the metal sleeve is sleeved on 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 larger than that of the cylindrical sleeve. In some embodiments, one end of the metal sleeve is connected with the round chassis of the insulating rubber seat in a low mode, and the other end of the metal sleeve is buckled with the cylindrical sleeve of the insulating rubber seat through crimping. In some embodiments, the welding base of the