1235 Aluminum Foil Roll for Battery

For lithium-ion batteries, the positive current collector is usually aluminum foil, and the negative current collector is copper foil. In order to ensure the stability of the current collector inside the battery, the purity of both is required to be above 98%. The most important requirement for the current collector is to reduce the thickness and weight of the current collector.

Compared with ordinary aluminum foil, the requirements for aluminum foil and battery are higher, among which the thickness is required to be controlled at 10~50 microns, and some battery factories even use 8-micron aluminum foil. At the same time, the battery current collector is also required to have lower roughness, better conductivity, tensile strength, and elongation. In addition, there are also high requirements for product consistency and stability.

Battery aluminum foil has a high purity. The battery aluminum foil currently produced in the market is mainly 1060, 1070, 1100, 1235 and other alloys, and the above alloys all belong to the 1000 series. This series of alloys contains more aluminum, and the purity can reach more than 99.00%. It uses 1235 alloy to produce battery aluminum foil, and the aluminum content reaches 99.35%.

The alloy composition of 1235 aluminum foil and 8011 aluminum foil is different. The difference in process lies in the different annealing temperatures. The annealing temperature of 1235 aluminum foil is lower than that of 8011 aluminum foil, but the annealing time is basically the same. The tensile strength of 8011 aluminum foil is higher than that of 1235 aluminum foil. At the same time, the elongation of 8011 aluminum foil is not much different from that of 1235 aluminum foil, but slightly higher.

The production process of battery aluminum foil blanks is divided into three methods: ingot hot rolling (DC), twin-roll continuous casting and rolling (CC) and Hazmont continuous casting and rolling of strip billets. Ingot hot rolling and twin-roll continuous casting and rolling are mainly used at home and abroad, and Hazmont's production method is less used.

Due to the particularity of battery aluminum foil and the extremely high requirements for product quality, higher requirements are put forward for production technology, production equipment and testing methods. In the future, competition will be more intense. Haomei Aluminum will establish a professional production line for battery aluminum foil. Welcome to leave message below to inquire what you need.