Lu'an preferred lithium copper foil processing
High end lithium battery copper foil needs to meet the requirements of high energy density, high safety, lightweight and other characteristics of power batteries, which is also the development trend of power batteries in the future. In order to meet the above characteristics, thinner lithium copper foil means smaller resistance, so the energy density and other performance of the battery will be improved. Moreover, the thinner the copper foil of lithium battery is, the lighter the weight of the corresponding battery will be.
Lu'an preferred lithium copper foil processing
The electrolyte contains oil, paint, grease, sediment and other contaminants attached to the surface of copper foil. After being squeezed by the squeezing (water) roller, the contaminants are squeezed flat, some contaminants attach to it, and some contaminants attach to the guide roller. Because the dirt is squeezed up during the operation, the dirt has a head and a tail, and has a direction.
Lu'an preferred lithium copper foil processing
In order to improve the bonding strength of copper foil to the substrate, oxidation is usually used (that is, after oxidation treatment, a layer of copper oxide or cuprous oxide is formed on the surface, which improves the bonding strength of copper foil and substrate due to the polarity) Or roughen the copper foil (a roughened layer is generated on the surface of the copper foil by electrochemical method, which increases the surface area of the copper foil and improves the bonding strength between the copper foil and the substrate due to the anchoring effect of the roughened layer on the substrate).
Lu'an preferred lithium copper foil processing
The technical feature of electrolytic copper foil is that various technical conditions in electrolyte and additives must be strictly controlled, so equipment alone is not enough to produce high-performance copper foil; High performance has high requirements for the materials of anode plate and cathode roll in the raw foil equipment, the processing accuracy and consistency of the equipment; In the production process, the concentration of copper and acid in the electrolyte needs to be monitored and adjusted in real time.
Lu'an preferred lithium copper foil processing
Calendered copper foil is a product made by repeatedly rolling and annealing high-precision copper strip (usually less than 150 microns in thickness) based on the principle of plastic processing (usually 4-100 microns in thickness and<800 mm in width). Its ductility, bending resistance and conductivity are better than those of electrolytic copper foil, and the copper purity is also higher than that of electrolytic copper foil.
Lu'an preferred lithium copper foil processing
The ultra-thin copper foil, represented by mobile phones and laptops, is promoted to thin foil and ultra-thin foil types for portable electronic products, including micro buried, blind hole L multilayer boards, and BGA, CSP and other organic resin packaging substrates. At the same time, COz laser etching also requires the substrate to be extremely thin, so that the copper foil layer can be directly machined with micro wire holes. In Japan, the United States and other countries, electrolytic copper foils of 9 μ m, 5 μ m and 3/- tm can be industrialized. At present, the difficulty or key point of the production technology of ultra-thin copper foil is whether it can be directly produced without carrier, and the product qualification rate is high, as well as the development of new carriers.
