Can the Aluminum Electrolytic Capacitor be stored for a long time

Can the Aluminum Electrolytic Capacitor be stored for a long time

Long-term storage of aluminum electrolytic capacitors may lose their effect because electrolytic capacitors need to be regularly applied with rated voltage during long-term storage, which will stimulate and maintain the activity of the electrolyte, otherwise, the electrolyte in the electrolytic capacitor will lose its activity and deteriorate. After the electrolyte loses its activity and ages, the electrolytic capacitor will fail.


Aluminum electrolytic capacitors are very sensitive to chlorine and bromine. If you use halogen-containing fluxes, cleaning agents, fixatives, fumigants, and halides, they may penetrate the inside of the capacitor through the seal, which will cause the capacitor anode Corrosion will accelerate the failure of capacitors after power-on, so it is necessary to strictly control the halogen components of related sensitizers used in the production process.


After the aluminum electrolytic capacitor is stored in a high-temperature environment for a long time, the anodic oxide film of the capacitor and the electrolyte will undergo a chemical reaction, causing the withstand voltage to drop and the leakage current to increase. When the capacitor voltage is close to the rated voltage after a sudden power-on, it will Cause over-voltage failure or excessive leakage current, resulting in overheating failure.


The most common reason for the failure of aluminum electrolytic capacitors is that the electrolyte itself evaporates over time. The capacitor is composed of a conductive layer separated by a dielectric. Its anode is an aluminum sheet with an enlarged surface area. The oxide layer is used as a dielectric layer, and the working electrolyte is a conductive liquid, so there is a problem of evaporation. The second aluminum sheet is the cathode sheet, which is used to transfer current to the working electrolyte. Anodizing is a manufacturing process used to prolong the life of the capacitor and ensure the high purity of the material used.


Aillen is a professional aluminum electrolytic capacitor manufacturer. If you have any questions, please feel free to contact us.


aluminum electrolytic capacitor manufacturer

评论

发表评论

此博客中的热门博文

Four types of chip inductors

图片
  Four types of chip inductors There are four main types of  chip inductors , namely wire-wound, laminated, woven and thin-film chip inductors. Two types of wire-wound type and laminated type are commonly used. The former is a product of the miniaturization of traditional wire-wound inductors; the latter is made with multilayer printing technology and laminated production technology, and its volume is smaller than wire-wound chip inductors. It is a key product developed in the field of inductive components. 1. Winding type It is characterized by a wide range of inductance (mH～H), high inductance accuracy, low loss (large Q), large allowable current, strong manufacturing process inheritance, simplicity, and low cost, but its shortcomings are further Miniaturization is limited. The ceramic core winding type chip inductor can maintain a stable inductance and a fairly high Q value at such a high frequency, so it occupies a place in the high-frequency circuit. TDK's NL series induc...
阅读全文

The main role of a capacitor

图片
  The main role of a capacitor Capacitors  play an important role in circuits such as tuning, bypassing, coupling, and filtering. With the rapid development of electronic information technology, the update speed of digital electronic products is getting faster and faster. The sales of consumer electronic products such as flat-panel TVs (LCD and PDP), notebook computers, digital cameras and other products continue to grow, which drives capacitors. Industry growth. So what is the main function of the capacitor? 1. Bypass The bypass capacitor is an energy storage device that provides energy for the local device. It can uniformize the output of the regulator and reduce the load demand. Just like a small rechargeable battery, the bypass capacitor can be charged and discharged to the device. In order to minimize the impedance, the bypass capacitor should be as close as possible to the power supply pin and ground pin of the load device. This can well prevent the ground potential rise...
阅读全文