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A kind of impregnation method of solid electrolytic capacitor

A solid-state electrolysis and capacitor technology, applied in solid electrolytic capacitors, drying/dipping machines, etc., can solve the problems of conductive polymer chain breaking, affecting product performance, and inability to discharge gas effectively, so as to improve initial characteristics and improve surge resistance. performance effect

Active Publication Date: 2021-10-08
YIYANG AIHUA FUXIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the corrosion holes formed by high-pressure aluminum foil are relatively deep, and the corrosion holes will extend to the left and right, so if the element is immersed in the impregnation solution too fast, the gas inside the element and the gas in the deep layer of the hole will not be able to be effectively discharged. The conductive polymer solution is not easy to immerse into the interior of the element and completely adhere to the surface of the alumina; in addition, the element and its final product will go through a high temperature environment during drying, aging and customer use. If the gas inside the element is not removed Clean, in a high temperature environment, the gas in the corrosion hole of the aluminum foil will expand or even be expelled, which may cause the evenly attached conductive polymer chain to be broken or even broken, which will affect the performance of the product

Method used

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  • A kind of impregnation method of solid electrolytic capacitor
  • A kind of impregnation method of solid electrolytic capacitor
  • A kind of impregnation method of solid electrolytic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a kind of impregnation method of solid electrolytic capacitor, comprises the following steps:

[0028] (1) Weld and fix 10 groups of elements on the horizontal bar, make the elements face down vertically, and make the bottom of each group of elements on the same horizontal line.

[0029] (2) First install the horizontal bar with the element fixed on the frame; then, place it in the impregnation equipment with a vacuum degree of 50kpa, so that the element is located above the impregnation liquid; then, drive the element on the horizontal bar to move downward, Make the bottom of the element contact with the liquid surface of the impregnating liquid, and stay for 10s to carry out the first stage impregnating treatment;

[0030] (3) Drive the elements on the horizontal bar to move downward at a constant speed at a descending speed of 0.1mm / s, so that 1 / 2 the volume of elements is immersed in the impregnating liquid, and stay for 100s to carry out th...

Embodiment 2

[0033] This embodiment provides a kind of impregnation method of solid electrolytic capacitor, comprises the following steps:

[0034] (1) Weld and fix 30 groups of elements on the horizontal bar, make the elements face down vertically, and make the bottom of each group of elements on the same horizontal line.

[0035] (2) First install the horizontal bar with the element fixed on the frame; then, place it in the impregnation equipment with a vacuum degree of 90kpa, so that the element is located above the impregnation liquid; then, drive the element on the horizontal bar to move downward, Make the bottom of the element contact with the liquid surface of the impregnating liquid, and stay for 60s to carry out the first stage impregnating treatment;

[0036] (3) Drive the elements on the bar to move downward at a constant speed at a descending speed of 0.4mm / s, so that 1 / 2 volume of elements is immersed in the impregnating solution, and stay for 300s to carry out the second stag...

Embodiment 3

[0039] This embodiment provides a kind of impregnation method of solid electrolytic capacitor, comprises the following steps:

[0040] (1) Weld and fix 20 groups of elements on the horizontal bar, make the elements face down vertically, and make the bottom of each group of elements on the same horizontal line.

[0041] (2) First install the horizontal bar with the element fixed on the frame; then, place it in the impregnation equipment with a vacuum degree of 80kpa, so that the element is located above the impregnation liquid; then, drive the element on the horizontal bar to move downward, Make the bottom of the element contact with the liquid surface of the impregnating liquid, and stay for 30s to carry out the first stage impregnating treatment;

[0042] (3) Drive the elements on the horizontal bar to move downward at a constant speed at a descending speed of 0.3mm / s, so that 2 / 3 of the volume of elements is immersed in the impregnating liquid, and stay for 200s, and carry o...

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Abstract

The invention discloses an impregnation method for a solid electrolytic capacitor, belonging to the technical field of aluminum electrolytic capacitors. The impregnation method includes the following steps: first place the element under negative pressure conditions, and make the bottom of the element contact with the liquid surface of the impregnating liquid, and perform the first-stage impregnation treatment; then, at a descending speed of 0.1-0.4mm / s Drive the element to move downward, so that a part of the element is immersed in the impregnating liquid, and carry out the second stage impregnation treatment; then, continue to drive the element to move downward at a descending speed of 0.1-0.4mm / s, so that the top of the element is in contact with the impregnating liquid The liquid level is aligned, and the third stage of impregnation treatment is carried out to complete the entire impregnation process. In the present invention, the element is impregnated in three stages, so that the impregnating liquid can be evenly dispersed on the surface of electrolytic paper and aluminum foil, and the impregnating liquid can be immersed into the deeper corrosion hole inside the element, and the air in the corrosion hole can be discharged , so that the initial characteristics of the product can be improved and the tolerance and failure of the product can be reduced.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolytic capacitors, in particular to an impregnation method for solid electrolytic capacitors. Background technique [0002] Impregnation refers to a process of immersing the element into a solution such as a monomer and an oxidant, so that the solution of the monomer and an oxidant forms a conductive polymer film inside the element. Among them, impregnation is one of the most important processes in the preparation of solid electrolytic capacitors, which has a great influence on the performance of the final product. [0003] During the impregnation process of the element of the existing solid aluminum electrolytic capacitor, the element is generally dropped from above the impregnating liquid into the impregnating liquid at a speed of about 10mm / s, and the impregnating liquid is directly immersed to the shoulder of the element, and then stays for 300s After left and right, take it out again ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/15H01G13/04
CPCH01G9/15H01G13/04
Inventor 朱凯姚兴旺周世贤
Owner YIYANG AIHUA FUXIAN ELECTRONICS
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