A square solid capacitor and its manufacturing method

Abstract

A square solid-state capacitor comprises a square aluminum shell, a capacitor core pack, a rubber plug and an aluminum shell cover plate, wherein the capacitor core pack is of a flat oval shape, the rubber plug and the aluminum shell cover plate are used for sealing the core pack in the square aluminum shell, the capacitor core pack comprises a positive electrode foil, a negative electrode foil, a piece of electrolytic paper, a positive lead and a negative lead, the electrolytic paper, the positive lead and the negative lead are arranged between the positive electrode foil and the negative electrode foil, a monomer and an oxidizing agent are immersed in the electrolytic paper, a conductive polymer is generated on the electrolytic paper from the monomer and the oxidizing agent, the monomer is one or more EDOT and derivatives thereof, pyrrole and aniline, and the oxidizing agent is one or more of iron p-toluenesulfonate, ammonium persulfate, sodium persulfate, ammonium sulfate and ferric chloride. The solid-state capacitor with a square structure is small in thickness (width) and long in length, the volume, capacity and density requirements of the solid-state capacitor are ensured, meanwhile, the demand for placing the solid-state capacitor in a flat space is met, and the space utilization ratio and the cooling performance of the capacitor are improved.

Description

technical field [0001] The invention relates to a capacitor, in particular to a square solid 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 seen on the market are designed with a cylindrical structure. ...

AI Technical Summary

Problems solved by technology

[0006] In addition, the working electrolyte of traditional electrolytic capacitors is liquid or "pasty". This type of capacitor has many fatal weaknesses, such as the working electrolyte will gradually dry up and fail over time, the temperature-frequency characteristics are relatively poor, and the ESR is large, etc.

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