In the two decades from 2016 to 2035, the compound growth rate of aluminum foil for automotive lithium-ion batteries in my country and around the world can reach 15% or even higher. Since the industrial production of aluminum in 1888, there has never been a product Growing at such a high rate for such a long time. This article introduces the basic concepts of electronic/battery aluminum foil, and also introduces in detail the overview of electronic/battery foil companies that have been established and are under construction in my country in recent years. According to the data reviewed by the author, as of 2021, there are more than 200 electronic/battery aluminum foil manufacturers in the country of a certain scale, with a total production capacity of approximately 1.5 million tons per year. my country's battery foil production can fully meet the demand for aluminum foil in the development of automobile batteries.
Aluminum foil is generally classified according to thickness, status and use.
According to thickness: aluminum foils greater than 0.012mm are called single foils, and aluminum foils less than or equal to 0.012mm are called double foils; those with a thickness with a 0 after the decimal point are also called single-zero foils, and those with two 0s after the decimal point. It is called double zero foil. For example, 0.005mm foil can be called double zero 5 foil.
According to the state, it can be divided into full hard foil, soft state foil, semi-hard foil, 3/4 hard foil, and 1/4 hard foil. Fully hard foil refers to foil that has not been annealed after rolling (completely annealed coil and >75% cold rolling), such as container foil, decorative foil, medicine foil, etc.; soft foil refers to fully annealed after cold rolling Foils, such as composite packaging materials such as food and cigarettes, and electrical appliance foils; any aluminum foil whose tensile strength is between full hard foil and soft foil is called semi-rigid foil, such as air conditioning foil, bottle cap foil, etc.; any aluminum foil whose tensile strength is between The strength of aluminum foil is between full hard foil and semi-hard foil, which is called 3/4 hard foil, such as air-conditioning foil, aluminum-plastic pipe foil, etc.; the tensile strength of aluminum foil is between soft foil and semi-hard foil, which is called 1 /4hard foil.
According to the surface condition, it can be divided into single-sided light foil and double-sided light foil. Aluminum foil rolling is divided into single-sheet rolling and double-sheet rolling. During single-sheet rolling, both sides of the foil are in contact with the roller surface, and both sides have a bright metallic luster, which is called double-sided light foil. During double rolling, only one side of each foil is in contact with the roller. The side in contact with the roller is bright, and the two sides in contact with each other are dark. This kind of foil is called single-sided light foil. The minimum thickness of double-sided aluminum foil mainly depends on the diameter of the work roll, which is usually not less than 0.01mm. The thickness of single-sided aluminum foil is usually not greater than 0.03mm, and the current minimum thickness can reach 0.004mm.
Aluminum foil can be divided into packaging foil, pharmaceutical foil, daily necessities foil, battery foil, electrical and electronic foil, construction foil, etc. according to its use.
