Shulou(Shulou.com)11/24 Report--

CTOnews.com, November 14, SK Nexilis announced that it has completed the development of high-extension V-shaped copper foil for the next generation of high-capacity cylindrical battery "4680".

The company said on the 13th that the elongation of the newly developed V-shaped copper foil is more than 30% higher than that of other products and has passed customer evaluation. The aluminum foil is expected to be supplied to customers after mass production evaluation.

CTOnews.com learned that SK nexilis (formerly KCFT) is a global secondary battery and display material company specializing in manufacturing battery cathode core materials, with the most advanced copper foil technology in the world. In October last year, the company produced the world's thinnest 4-inch thick ultra-thin copper foil roll, 1.4m wide and 30Km long, the longest in the world.

You should be familiar with the 4680 battery. This is a cylindrical battery with a diameter of 46 mm and a length of 80 mm. The energy density and output of this new battery is five to six times higher than the existing 2170 battery.

According to the copper foil produced by SK Nexilis, the high elongation V copper foil of SK Nexilis solves the problem of anode material expansion in the process of battery charge and discharge, which is suitable for cylindrical secondary batteries. Due to the structure of the battery, the secondary battery often shows a strong expansion problem, while large-capacity cylindrical batteries, such as 4680 batteries, generally require a very high elongation of copper foil.

The industry predicts that by 2030, the cylindrical battery market will focus on high-capacity products, with an average annual growth rate of 23 times. Copper foil for cylindrical batteries will also increase rapidly from 43000 tons in 2022 to 230000 tons in 2030.

Therefore, it is expected that the demand for high elongation V-shaped copper foil of SK Nexilis will also increase significantly. Prior to this, SK Nexilis successfully obtained the mass production technology of ultra-high strength u-shaped copper foil with tensile strength of 65kgf / copper for the first time in the industry, forming a complete product line of high-strength copper foil.

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