What Is Capacitor Aluminum Foil

An aluminum electrolytic capacitor is a capacitor with a positive electrode and a negative electrode. The basic structure of an aluminum electrolytic capacitor is composed of a layer of anode aluminum foil, a layer of cathode aluminum foil, and a layer of liner paper soaked in electrolyte and a natural oxide film sandwiched between them. It is a capacitor made of winding, and the electrodes are soaked in electrolyte and then sealed with an aluminum shell and a plastic cover.

Anode foil refers to the aluminum foil used as the anode in electrolytic capacitors. The anode foil is not only etched but also anodized during the production process of the capacitor. The negative electrode foil refers to the aluminum foil used as the negative electrode in the electrolytic capacitor. The cathode in an aluminum electrolytic capacitor is essentially an electrolyte paste, and the negative electrode foil is the lead of the cathode.

The capacitor aluminum foil(plain aluminum foil) is made from high-purity aluminum ingots through special refining, rolling, cleaning and cutting processes, and then processed through an etching process to obtain corroded foil, which is then anodized to obtain the formed foil. The corrosion process causes corroded pits to form on the mill finish aluminum foil, increasing its surface area and thus giving the aluminum electrolytic capacitor its high capacitance.

The capacitor aluminum foil is one of the most technical parts of the aluminum electrolytic capacitor device industry chain.

The complete industrial chain of electrode foil is: refined aluminum (high-purity aluminum ingot)-electronic aluminum foil(plain aluminum) -corrosion foil-formed foil-aluminum electrolytic capacitor-electronic machine (such as high-definition TV, etc.). In the electrode foil industry chain, the corrosion foil used to produce the final foil product is the most technically difficult and the most profitable link.

The aluminum foil is the core component of aluminum electrolytic capacitors. Inside the capacitor, the aluminum foil serves as the positive electrode. It is usually made of high-purity metal aluminum sheet. Haomei Aluminum provides aluminium foil jumbo roll for further process like etching or forming.

The 1 series and 3 series aluminum foils produced by Henan Haomei can be used in the manufacture of electronic foils, such as 3003 aluminum foil and 1235-o aluminum foil. The foil rolling mill introduced by Haomei Aluminum was designed and installed by Zhuoshen Company. It adopts ANDRITZ plate rollers and full hydraulic control, and cooperates with high-precision pressure sensors and servo valves to achieve an excellent roll gap and ensure the safety of electronic foil quality.