Square solid-state aluminum electrolytic capacitor with flexible package and manufacturing method thereof

Abstract

The invention provides a square solid-state aluminum electrolytic capacitor with flexible package, comprising an aluminum plastic shell and a flat elliptoid capacitor core bag, wherein the capacitor core bag is sealed in the aluminum plastic shell and comprises an anode foil, a cathode foil, electrolytic paper placed between the anode foil and the cathode foil, a positive lead and a negative lead; the positive lead and the negative lead extend out of the aluminum plastic shell; the electrolytic paper is impregnated with a monomer and an oxidizing agent, wherein the monomer and the oxidizing agent generate a conducting polymer on the electrolytic paper, the monomer is one or more of EDOT, derivatives of EDOT, pyrrole and phenylamine, the oxidizing agent is one or more of iron(III)p-toluenesulfonate, ammonium persulfate, sodium persulfate, ammonium sulfate and ferric chloride. The square solid-state aluminum electrolytic capacitor with flexible package can bear bending to some extent in the process of installation and use since the shell is of flexible package; moreover, due to use of the flexible package design, the rubber plug design of the traditional aluminum electrolytic capacitor is omitted and therefore the cost is saved.

Description

technical field [0001] The invention relates to a capacitor, in particular to a soft-packed square solid aluminum electrolytic capacitor and a manufacturing method thereof. Background technique [0002] Aluminum electrolytic capacitors are one of the most important basic electronic components in electronic engineering. It is not only widely used in LED, power supply and other electronic circuits as filtering, coupling and bypass, but also plays a special role in special circuits such as correction circuits, pump power circuits and AC motor starting circuits. "2013~2017 China Aluminum Electrolytic Capacitor Industry Development Prospects and Investment Forecast Analysis Report" data shows that the global output value in 2010 was 5.2 billion US dollars, and the average growth rate in the past 7 years was 4% to 5%. The market potential of aluminum electrolytic capacitors is huge. [0003] At present, the aluminum electrolytic capacitors that can be widely used in the market ar...

AI Technical Summary

Problems solved by technology

However, in some applications, in order to reduce the volume of the integrated circuit, only a flat space can be reserved for soldering capacitors. The space around the cylindrical aluminum electrolytic capacitor cannot be effectively utilized, and the volume utilization rate in the flat space is low.

On the other hand, under the condition of high ripple current, heat is easy to accumulate inside the capacitor. If the heat cannot be dissipated effectively, it will affect the performance of the product.

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