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Humidity-resistant laminated solid-state aluminium electrolytic capacitor and manufacturing method thereof

An aluminum electrolytic capacitor, moisture resistance technology, applied in the field of capacitance, can solve the problems of capacitor leakage current rise, mutual detachment, expansion, etc., to reduce the equivalent series resistance and leakage current, improve high temperature and high humidity resistance, and improve product performance. quality effect

Pending Publication Date: 2018-11-06
YIYANG AIHUA FUXIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The packaging material used for laminated solid capacitors is epoxy resin thermosetting plastic, which is porous and hydrophilic. Under high temperature and high humidity conditions, a large amount of water will Entering the laminated solid capacitor, the capacitor will expand after absorbing moisture, the polymer layer, carbon layer, and silver layer will separate from each other, the product ESR (Equivalent Series Resistance, equivalent series resistance) will increase greatly, and the capacity will decrease significantly; In addition, the water and the oxidant remaining inside the capacitor are hydrolyzed to form a weak acid solution, which erodes the dielectric layer of the oxide film, resulting in an increase in the leakage current of the capacitor

Method used

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  • Humidity-resistant laminated solid-state aluminium electrolytic capacitor and manufacturing method thereof
  • Humidity-resistant laminated solid-state aluminium electrolytic capacitor and manufacturing method thereof
  • Humidity-resistant laminated solid-state aluminium electrolytic capacitor and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, adopt paste method to make nano-Al 2 o 3 / Polyester composite material is pasted on the outer surface of the insulating resin layer. Specifically as follows:

[0036] nano-Al by paste method 2 o 3 / Polyester composite material is pasted on the outer surface of the laminated solid aluminum electrolytic capacitor packaging material. The thickness of the composite material is 20-30 microns. The packaging material of the laminated solid capacitor is heat-cured epoxy resin. In order to enhance the adhesion, it is necessary to Corona treatment was performed on the surface of the sample to increase the surface roughness. Such as image 3 shown, will be pasted with nano Al 2 o 3 The laminated solid aluminum electrolytic capacitor made of polyester composite material was tested for 100h at double 85 (85°C, 85%RH). 2 o 3 / Polyester composite laminated solid aluminum electrolytic capacitors have a 40% reduction in moisture absorption compared to capacitor...

Embodiment 2

[0037] Embodiment 2. Polyvinylidene chloride was coated on the outer surface of the insulating resin layer by scraping method. Specifically as follows:

[0038] The outer surface of the laminated solid aluminum electrolytic capacitor packaging material is coated with the barrier material polyvinylidene chloride PVDC by scraping method. The packaging material of the laminated solid capacitor is heat-cured epoxy resin, and the coating thickness of the barrier layer is about The specific process flow includes surface pretreatment, scraping coating and drying. For specific process parameters, please refer to the relevant literature and patents of polyvinylidene chloride coating technology. Such as image 3 As shown, the laminated solid aluminum electrolytic capacitor coated with PVDC was tested for 100 hours at double 85 (85°C, 85% RH). The moisture absorption capacity is reduced by 60%.

Embodiment 3

[0039] Embodiment 3. The p-xylene polymer is coated on the outer surface of the insulating resin layer by vapor deposition method. Specifically as follows:

[0040]The outer surface of the laminated solid aluminum electrolytic capacitor packaging material is coated with the barrier material p-xylene polymer Parylene C by a vapor deposition method. The packaging material of the laminated solid capacitor is heat-cured epoxy resin, and the moisture-resistant barrier layer 50 is coated. The coating thickness is about 20 microns. The specific process includes surface pretreatment, evaporation, cracking and polymerization. For specific process parameters, please refer to relevant literature and patents on the mechanism of vapor deposition Parylene. Such as image 3 As shown, the laminated solid aluminum electrolytic capacitor coated with Parylene C was subjected to a double 85 (85°C, 85% RH) test for 100 hours. Capacitors absorb 50% less moisture.

[0041] The method for manufact...

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Abstract

The invention discloses a humidity-resistant laminated solid-state aluminium electrolytic capacitor and a manufacturing method thereof. The humidity-resistant laminated solid-state aluminium electrolytic capacitor comprises a plurality of stacked single slices, and a positive lead-out terminal and a negative lead-out terminal electrically connected to the stacked single slices; wherein each singleslice comprises a positive end, a negative end and a shielding glue between the positive end and the negative end; the negative ends of each single slice are connected together and connected with thenegative lead-out terminal; the positive ends of each single slice are connected together and connected with the positive lead-out terminal; the outer surface of stacked plurality of single slices isencapsulated with an insulating resin layer; and the outer surface of the insulating resin layer is coated with a moisture-resistant barrier layer for water resisting, wherein the moisture permeability coefficient of the moisture-resistant barrier layer is lower than that of the insulating resin layer. The humidity-resistant laminated solid-state aluminium electrolytic capacitor and the manufacturing method provided by the invention can effectively reduce the equivalent series resistance and leakage current of the laminated solid-state aluminium electrolytic capacitor and improve the productquality.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a moisture-resistant laminated solid aluminum electrolytic capacitor and a manufacturing method. Background technique [0002] Laminated solid aluminum electrolytic capacitor is a new chip electronic component product with high conductivity conductive polymer material as solid electrolyte. It has smaller volume, better performance, wide temperature range, long life, high reliability and high environmental protection, etc. Many advantages, suitable for the development trend of electronic products miniaturization, high frequency, high speed, high reliability, high environmental protection and SMT (Surface Mount Technology, surface mount technology) requirements. The packaging material used for laminated solid capacitors is epoxy resin thermosetting plastic, which is porous and hydrophilic. Under high temperature and high humidity conditions, a large amount of water will Enterin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/15H01G9/08H01G13/00
CPCH01G9/15H01G9/08H01G13/003
Inventor 张超周世贤邹志平
Owner YIYANG AIHUA FUXIAN ELECTRONICS
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