Coiled polymer tantalum capacitor

Abstract

The invention provides a coiled polymer tantalum capacitor. The coiled polymer tantalum capacitor is prepared from the following steps of A. broaching on tantalum positive foil; B. cutting: first, cutting the broached and polished tantalum positive foil, second, cutting aluminum negative foil; and third, cutting electrolytic paper; C. connecting through a nail or winding: leading out positive andnegative poles; D. energizing: soaking, through applying DC voltage and current, in an energizing solution of certain temperature, such as phosphoric acid, and repairing a tantalum pentoxide layer; E.polymerizing a polymer cathode: soaking monomer and oxidant in the broached and polished tantalum sheet circularly, performing chemical reactions constantly under the conditions of constant humidityand constant temperature, so as to form a polymer cathode polymer layer; F. assembling: first, assembling a rubber tube, second, assembling a rubber cover, and third, assembling an aluminum shell; andG. charging and sorting. The coiled polymer tantalum capacitor has safer and more reliable performance, does not burn, and has lower equivalent serial resistance.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to winding polymer tantalum capacitors. Background technique [0002] Capacitors are an important part of electronic components. With the rapid development of science and technology in recent years, for military capacitors, ultra-high voltage, ultra-large capacity, and high-temperature reliability are important development directions. Wound polymer tantalum capacitors are an important research and development direction of the international and domestic capacitor industry in recent years. Compared with traditional liquid tantalum electrolytic capacitors, this product is a polarized, stick-wound capacitor. Traditional liquid tantalum electrolytic capacitors are relatively simple to manufacture, and equipment and materials are easy to match. Therefore, the unit price of this product is relatively low. However, the liquid electrolyte of this product has defects such as a large chang...

AI Technical Summary

Problems solved by technology

Traditional liquid tantalum electrolytic capacitors are relatively simple to manufacture, and equipment and materials are easy to match, so the unit price of this product is relatively low

However, the liquid electrolyte of this product has defects such as large resistivity changes with temperature changes, and potential safety hazards such as leakage.

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