Battery aluminum foil plays a key role in the manufacture of lithium-ion batteries. As a collector, it provides a conductive path for the positive and negative electrodes of the battery, ensuring that current flows correctly within the battery. As the current collector pole, aluminum foil is responsible for collecting the current generated by the positive electrode.
Aluminum foil is a hot stamping material made from metallic aluminum that is directly calendered into a thin sheet, and is also known as fake silver foil because its stamping effect is similar to that of pure silver foil. Aluminum has a soft, malleable texture and a silvery-white luster, and is therefore used in a wide variety of packaging and decorative applications.
Aluminum foil has a variety of advantages, including moisture-proof, air-tight, light-shielding, abrasion and corrosion-resistant, fragrance-preserving, non-toxic and odorless. It can be used not only for food packaging, but also for packaging in electronic products, automobile parts and other fields. In addition, aluminum foil can also be used to make a variety of crafts and decorations because it is easy to process beautiful patterns and designs in a variety of colors.
When making aluminum foil sheets, the calendered sheets need to be mounted on offset paper with a substance such as sodium silicate so that they can be printed. Aluminum foil can be used not only for hot stamping, but also for screen printing, gravure printing, and other printing processes.
By using rolled aluminum foil as a positive collector, the lithium-ion battery industry is able to realize the following advantages:
Reducing the internal resistance of the battery: Aluminum foil has excellent electrical conductivity, which can reduce the resistance of the current inside the battery, thus improving the charging and discharging efficiency of the battery.