A preparation method of laminated solid aluminum electrolytic capacitor based on microcapsule technology

A technology of aluminum electrolytic capacitors and microcapsule technology, which is applied in the manufacture of electrolytic capacitors, solid electrolytic capacitors, and electrolytic capacitors. The effect of improving the yield rate of industrialization and improving product reliability

Active Publication Date: 2021-11-23
福建国光新业科技股份有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, the moisture absorption process provides the necessary repair medium for the aging process. However, when the moisture absorption is insufficient, the aging repair effect is poor, resulting in a large leakage current of the capacitor product; and when the moisture absorption is oversaturated, the polymer will be excessively swollen, resulting in capacitance. Loss, leading to low capacity of capacitor products, increase in equivalent series resistance, and excessive water vapor will bring risks to product reliability
The above two situations will directly affect the industrial yield
In the mass production process, due to individual differences in products, it is difficult to obtain a uniform moisture absorption effect under the same moisture absorption conditions, resulting in uneven product aging and repair effects, which has become an urgent technical problem to be solved in the industrial production of this type of capacitor

Method used

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  • A preparation method of laminated solid aluminum electrolytic capacitor based on microcapsule technology

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preparation example Construction

[0032] see figure 1 , the present invention provides a technical solution: specifically a method for preparing a laminated solid aluminum electrolytic capacitor based on microcapsule technology, comprising the following steps:

[0033] S1. Cutting the chemically formed aluminum foil to obtain the first aluminum foil;

[0034] S2. Coating an insulating barrier glue on the surface of the first aluminum foil, and dividing an anode area and a cathode area to obtain a second aluminum foil;

[0035] S3. Performing a dielectric layer repair treatment on the side of the cathode region of the second aluminum foil through a rechemical conversion process to obtain a third aluminum foil;

[0036] S4. Form a conductive polymer solid electrolyte layer on the surface of the cathode region of the third aluminum foil by chemical polymerization and electrolytic polymerization to obtain a fourth aluminum foil;

[0037] S5, impregnating the cathode region of the fourth aluminum foil in the re-f...

Embodiment 1

[0056] S1. Select 3.5VF aluminum foil for cutting to obtain the first aluminum foil;

[0057] S2. Coating an insulating barrier glue on the surface of the first aluminum foil, and dividing an anode area and a cathode area to obtain a second aluminum foil;

[0058] S3. Performing a dielectric layer repair treatment on the side of the cathode region of the second aluminum foil through a rechemical conversion process to obtain a third aluminum foil;

[0059] S4. Form a conductive polymer solid electrolyte layer on the surface of the cathode region of the third aluminum foil by chemical polymerization and electrolytic polymerization to obtain a fourth aluminum foil;

[0060] S5, impregnating the cathode region of the fourth aluminum foil in the re-formation microcapsule dispersion wrapped with the aluminum foil formation reagent, and then performing drying treatment to obtain the fifth aluminum foil;

[0061] The preparation method of the fifth aluminum foil in step S5 comprises ...

Embodiment 2

[0073] The difference from Example 1 is that the preparation method of the fifth aluminum foil in step S5 includes the following steps:

[0074] (1) the ammonium adipate compound system chemical reagent is used as the core material, the carrageenan is used as the wall material, and the spray drying method is used to prepare and then chemically synthesize microcapsules;

[0075] (2) Disperse the re-formed microcapsules in a ratio of 1:10 in deionized water at 15°C by ultrasonic dispersion to obtain a re-formed microcapsule dispersion;

[0076] (3) Store the re-formed microcapsule dispersion at a constant temperature of 15°C, and impregnate the fourth aluminum foil cathode region in the dispersion under vacuum conditions for 30 minutes before drying.

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Abstract

The invention discloses a method for preparing a laminated solid aluminum electrolytic capacitor based on microcapsule technology. After obtaining the fourth aluminum foil whose surface is covered with a conductive polymer solid electrolyte layer, using microcapsule technology to pre-embed the aluminum foil forming reagent in In the capacitor core, and through the moisture absorption process combined with the aging process, an aluminum foil re-formation system is established; with the method provided by the invention, the aging effect can be achieved only by controlling the lower moisture absorption, which solves the problem of difficult control and uniformity in the prior art. The aging effect caused by the moisture absorption effect is uneven, which can improve the repair effect of the dielectric layer in the aging process, improve product reliability, and increase the yield of industrialized products.

Description

technical field [0001] The invention relates to the technical field of preparation of aluminum electrolytic capacitors, in particular to a preparation method of a laminated solid aluminum electrolytic capacitor based on microcapsule technology. Background technique [0002] Polymer laminated solid aluminum electrolytic capacitors use conductive polymers as electrolytes. Compared with traditional liquid aluminum electrolytic capacitors, they have many advantages such as smaller volume, better performance, wide temperature range, long life, high reliability and high environmental protection. In the production process of polymer laminated solid aluminum electrolytic capacitors, the moisture absorption process is generally used in combination with the aging process to repair the dielectric layer, so as to reduce the leakage current, improve the stability of the capacitor, and improve the yield rate in industrial production. [0003] Among them, the moisture absorption process pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/00H01G9/055H01G9/045H01G9/15
CPCH01G9/0032H01G9/0036H01G9/045H01G9/055H01G9/15
Inventor 林晓辉陈巧琳张秋水陈俊楠彭宛玉叶雷许志林
Owner 福建国光新业科技股份有限公司
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