Coiled polymer tantalum capacitor

A technology of tantalum capacitors and polymers, applied in the field of winding polymer tantalum capacitors, can solve the problems of large change in resistivity of liquid electrolyte, low unit price, and liquid leakage

Pending Publication Date: 2018-09-28
ZHUZHOU HONGDA ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Coiled polymer tantalum capacitor

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Embodiment Construction

[0015] Below in conjunction with all accompanying drawings the present invention will be further described, and preferred embodiment of the present invention is: see appended figure 1 , the winding polymer tantalum capacitor described in this embodiment, the purity of tantalum in the tantalum sheet material in the capacitor is controlled above 99.99%, and its production process includes the following steps:

[0016] 1) Among them, the hole expansion of positive tantalum foil is the core process, including electrochemical, chemical, and physical methods of hole expansion. Higher specific surface area and lower ESR can be produced by hole expansion. Electrochemical methods include constant current, constant voltage and other methods, chemical methods include corrosion of fluorine-containing compounds such as hydrofluoric acid, and physical methods include laser, mechanical perforation, etc. Reaming is a combination of one or several methods in order to achieve the best reaming ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/045H01G9/048H01G9/14H01G9/15
CPCH01G9/048H01G9/0425H01G9/045H01G9/14H01G9/151
Inventor 王文波袁坤阳王慧卉
Owner ZHUZHOU HONGDA ELECTRONICS
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