Hybrid aluminum electrolytic capacitor and manufacturing method thereof

An aluminum electrolytic capacitor, a hybrid technology, applied in the manufacture of electrolytic capacitors, hybrid/electric double layer capacitors, electrolytic capacitors, etc., can solve the problem of unrepaired positive oxide film defects, low electrolyte withstand voltage, low production efficiency, etc. problem, to achieve the effect of not easy short circuit, high withstand voltage and stable performance

Active Publication Date: 2020-01-14
CAPXON ELECTRONIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the withstand voltage of these electrolytes is low, and when applied to different voltages, the deployment of the electrolyte needs to be changed according to the fixed voltage of the capacitor, so that in the production process, the preparation equipment needs to be adjusted according to the change of each voltage, and the production efficiency is very low.
Moreover, solid electrolytic capacitors are solid conductive polymers, which have no ability to repair the defects of the positive oxide film. If they are used in a high-temperature working environment of 85-150°C for a long time, the LC may increase, and may even cause a short circuit.

Method used

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  • Hybrid aluminum electrolytic capacitor and manufacturing method thereof
  • Hybrid aluminum electrolytic capacitor and manufacturing method thereof
  • Hybrid aluminum electrolytic capacitor and manufacturing method thereof

Examples

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Effect test

preparation example Construction

[0040] The present invention also provides a method for preparing a hybrid aluminum electrolytic capacitor, comprising the following steps:

[0041] S100, to make capacitor elements, cut the positive foil, negative foil and electrolytic paper according to the designed size with a stapler, and then rivet the positive and negative guide pins on the positive and negative foils respectively, and then the positive and negative foils The electrolytic paper is wound into a circle, and finally the high temperature resistant insulating tape is wrapped around the periphery of the circle to fix it to form a capacitor element;

[0042] S200, impregnating the capacitor element into a solution, and applying a voltage to the capacitor element according to the withstand voltage of the positive foil, and repairing the defect of the oxide film on the surface of the positive foil of the capacitor element caused by cutting and nailing;

[0043] The formation solution at this stage is ammonium dih...

Embodiment 1

[0062] Prepare a hybrid aluminum electrolytic capacitor according to the method, wherein, in step S100, the positive foil uses aluminum foil with a dielectric film (film withstand voltage 150V) formed by surface corrosion treatment and anodic oxidation treatment, and the negative foil uses surface corrosion treatment and aluminum foil. Aluminum foils with a dielectric film (film withstand voltage 2V) formed by anodizing are cut to a predetermined size, and tab terminals of external lead electrodes are connected to each foil. Positive foil and negative foil passing density 0.35g / cm 3 , Aramid fiber, polyester fiber or cellulose fiber with a thickness of 50um is wound into a non-woven fabric separator to complete the winding of the capacitor element.

[0063] In step S200, a voltage of 150V is applied to the ammonium adipate system forming solution, and a current density of 0.05Ma / pcs is used to repair the oxide film defects on the cut surface of the positive foil caused by cutt...

Embodiment 2

[0070] The operation steps of this embodiment are basically the same as those of Embodiment 1, the difference is that in step S300, the conductive polymer dispersion is impregnated and dried twice, and the film repair liquid impregnated in step S400 is calculated by weight percentage, including: as an organic solvent 50wt% γ-butyrolactone, 35wt% sulfolane and 14.5wt% polyethylene glycol, 0.25wt% benzoic acid as acid, 0.25wt% triethanolamine as amine. A hybrid aluminum electrolytic capacitor having the same specifications as in Example 1 was fabricated.

[0071] Among them, the electrical performance of the capacitor element in step S300 will be tested, and the results are shown in Table 1.

[0072] The test results of the characteristic parameters of the film repair liquid of Example 2: the electrical conductivity is 0.035mS / cm (tested at 28-32°C), the pH is 6.1 (tested at 28-32°C), the water content is 0.18wt%, and the withstand voltage higher than 600V.

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Abstract

The invention provides a hybrid aluminum electrolytic capacitor and a manufacturing method thereof. The hybrid aluminum electrolytic capacitor is impregnated with a coating repair liquid, and the coating repair liquid comprises an organic solvent with a boiling point of 180 DEG C or more, a small amount of inorganic acid and / or organic acid, and an amine with a boiling point of 180 DEG C or more.The film repairing liquid is high in voltage resistance and has a repairing effect on an oxide film of a positive foil of an aluminum non-solid electrolytic capacitor. The hybrid aluminum electrolyticcapacitor prepared from the membrane repair liquid has the characteristics of high voltage, high capacity, low impedance, small leakage current and the like, and can keep the characteristics of low equivalent series resistance and low impedance in a high-frequency range.

Description

technical field [0001] The invention relates to the technical field of electrolytic capacitors, in particular to a hybrid aluminum electrolytic capacitor and a manufacturing method thereof. [0002] technical background [0003] Aluminum electrolytic capacitors are widely used basic components in electronic products. Electrolyte is the core component of aluminum electrolytic capacitors. The service life, reliability and electrification parameters of capacitors are closely related to it. The quality of its performance directly affects the quality of capacitors. high and low. [0004] In the prior art, the capacitive element is impregnated in the conductive polymer mixed electrolyte, and the known electrolyte is used. The concentration of these electrolytes is generally adjusted to be higher than 10wt% from the perspective of electrical conductivity. However, the withstand voltage of these electrolytes is low. When applied to different voltages, the deployment of the electroly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/004H01G9/035C09K3/00
CPCC09K3/00H01G9/0029H01G9/004H01G9/035C25D11/06H01G9/0032H01G9/028H01G9/07H01G9/14H01G9/145H01G9/151Y02E60/13H01G11/48H01G11/60H01G11/78H01G11/84
Inventor 熊军林薏竹
Owner CAPXON ELECTRONIC (SHENZHEN) CO LTD
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