We independently develop the core process of 6 µ m high-end flexible copper foil and quantitatively produce high-performance diversified products to meet the requirements of large capacity and high mileage for electric vehicles. It has the characteristics of "five highs and one super long": high flexibility, high elongation, high tensile strength, high oxidation resistance, high metallic texture, and super long without joints. The biggest feature of flexible copper foil is that it does not produce copper powder during the shearing process. After being made into a lithium battery, it has high strength, high rate, and no cracking or fracture during cyclic charging and discharging, which can increase the battery's service life. Copper foil has strong adhesion and conductivity to negative electrode materials compared to peers in the same industry. Our independently developed core technology has reached the advanced level of Japan and the United States, and does not contain harmful substances such as chromium, lead, beryllium, arsenic, etc., meeting the environmental requirements of the European Union (RoHS). The application of flexible copper foil in power lithium batteries can greatly improve the safety of high-capacity range for power vehicles. The process of this product is mature and stable, with a current monthly output of up to 500 tons, which can meet the demand of most downstream enterprises.
Technical parameters of ultra-thin 6 µ m flexible power lithium battery copper foil
| Item | Unit | Parameters |
| 6μm | ||
| Weight per unit area | g/m² | 54±1.5 |
| Tensile strength at room temperature | Kg/m² | ≥35 |
| Elongation in Room temperature | % | ≥3.5 |
| Purty | % | ≥99.9 |
| Surface roughness (Surface S) | Ra(um) | ≤0.30 |
| Surface roughness (Surface M) | Rz(um) | ≤1.5 |
| High temperature antioxidant performance | Oven at 200 ℃ for 60 minutes | No oxidation, no discoloration |
| Destructive experiment | Constant temperature 85 ℃, constant humidity 85%, 72 hours | No oxidation, no discoloration |
