Treatment liquid for improving withstand voltage of solid capacitors and preparation method of solid capacitors

Abstract

The invention discloses a treatment fluid for improving the withstand voltage of a solid capacitor. The treatment fluid is prepared from raw materials including a solvent and a solute, the solvent comprises a water-system high-molecular material and an organic solvent, the water-system high-molecular material includes a macromolecular compound in the molecular weight of 200-1000 and a macromolecular compound in the molecular weight of 2000-10000, and the solute comprises an organic and / or inorganic acid as well as amine which can react with the organic and / or inorganic acid to generate salt. The invention also discloses a preparation method of the solid capacitor in which the treatment fluid is used. After that a capacitor core of the solid capacitor is impregnated in the treatment fluid,an oxide film defect in the surface of an aluminum foil of the capacitor core is overcome, short circuit is inhibited, the withstand voltage is improved by 30% to 50%, the voltage characteristic is improved, the capacity attenuation change rate is reduced, the capacity leading-out rate is improved, the reliability is improved, and the solid capacitor of higher capacitor and small size can be produced.

Description

Technical field [0001] The invention relates to the field of solid capacitors, and in particular to a treatment liquid used for improving the withstand voltage of solid capacitors and a preparation method of solid capacitors. Background technique [0002] With the rapid development of the electronics industry and the wide application of electronic products, especially in the field of AV machinery and automobile production, the requirements for solid capacitors are getting higher and higher, with smaller size, higher capacity, and lower ESR (Equivalent Series Resistance, Series equivalent resistance) and LC, as well as better short-circuit resistance, are the development direction of solid capacitors in the future. [0003] Solid capacitors, also known as solid aluminum electrolytic capacitors, whose dielectric material is solid conductive polymer materials, have high stability, long service life, low ESR and high rated ripple current compared with liquid aluminum electrolytic capac...

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Problems solved by technology

[0003] Solid capacitor, also known as solid aluminum electrolytic capacitor, its dielectric material is solid conductive polymer material, compared with liquid aluminum electrolytic capacitor, it has high stability, long service life, low ESR and high rated ripple current, etc. Advantages, but it does not have the ability of the electrolyte of liquid aluminum electrolytic capacitors to repair the defects of the positive oxide film, and the ability to inhibit short-circuit is low. Its failure mode is short-circuit. There is a high possibility that it may even cause a short circuit, and the reliability performance needs to be improved

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