In terms of aluminum foil technology, GNEE Aluminum has mastered core processes including hot rolling/cast rolling, cold rolling, foil rolling, slitting, rewinding, etc., and has passed technical research.
In terms of market demand, "lithium battery aluminum foil has high technical requirements and difficult production, and the yield rate is only about 70%." The pain points in the aluminum foil manufacturing process, and shared the latest achievements of GNEE Aluminum.
First, thinning aluminum foil for batteries has become a trend, and the process technology is becoming more and more difficult. In the field of power, from 20μm to the current mainstream 13μm, many have dropped to 12μm, and there are still a small number of 10μm applications.
It is reported that in terms of ultra-thin aluminum foil, GNEE Aluminum's 9μm double-sided high-strength lithium battery aluminum foil has been mass-produced. In addition, the thinnest aluminum foil it has developed has reached 7μm, ranking first in the industry.
Second, from the perspective of product mechanical properties, GNEE Aluminum's 1060 aluminum foil has a tensile strength of 200Mpa, 1235 aluminum foil has a tensile strength of 250Mpa, and 1100 aluminum foil has a tensile strength of 280Mpa, which can ensure the processing performance of the foils.
Third, elongation is one of the core performance indicators of aluminum foil. It has increased from the original 3% to the current 4% to ensure the mechanical properties of the foil.
Fourth, pinhole control is also a difficult problem. Taking 13μm aluminum foil as an example, the pinhole requirement has been reduced from 10 to 3 per square meter.
Fifth, the dyne value of aluminum foil is required for lithium battery cathode coating. Traditional lithium battery aluminum foil is between 30-40dyn. For some high dyne requirements, GNEE Aluminum has achieved 70dyn through surface treatment with special processes to further enhance the aluminum foil. Adhesion.
