Teknis karakteristik dari baterai foil
Apa kita biasanya panggilan baterai foil sekarang referensi ke yang tidak dimodifikasi aluminium foil bekas di lithium baterai saat ini kolektor% 2c yang berarti itu harus menjadi dibedakan dari lainnya foil bekas on on on yang lain yang digunakan lithium on baterai yang ada bahan adalah dilapisi on it. Oleh karena itu% 2c a lebih akurat definisi harus be the aluminium foil untuk saat ini kolektor dari lithium baterai.
Asing materi: Lithium baterai harus memiliki tinggi keamanan selama penggunaan, jadi asing materi (kotoran) pada permukaan harus menjadi ketat dikendalikan. Jika asing materi kontrol adalah tidak dibawa keluar, it cannot be used as a qualified battery foil. The foreign matter can be aluminium powder or magnetic substances ( iron powder), and other substances. The entire production process must be protected to reduce the possibility of introducing foreign materi. In the finished product process, a device for detecting foreign matter must be set up and accurately measured. Foreign matter should be Less than or equal to 50mg/300,000m2.
Wettability: Wetting performance mainly depends on the liquid contact angle. The liquid contact angle is when a liquid droplet does not fully expand on the solid surface. At the meeting point of the gas, liquid, and solid phases, the contact angle θ is used to determine the wetting of the solid by the liquid (the horizontal line of the solid-liquid interface and the gas-liquid interface The angle θ between the interface tangents is called the contact angle): when θ < 900, it is called wetting: when θ > 90*, it is non-wetting: when θ=00 or does not exist, it is called complete wetting; θ=At 1800 it is completely non-wetting. θ=900 is the dividing line between wetting and non-wetting.
Sejak the oil on the surface of aluminium foil generally cannot be fully removed, and the uneven surface wrinkles will have a great impact on the surface tension, it is not practical to direct measure the contact angle, so the dyne value is used in production practice to reflect the lubrication. Wetting ability, the higher the dyne value, the better the wetting performance. Namun, some high-end customers, especially those in Japan and other places, still use the contact angle method to measure the wettability of aluminium foil surfaces. In order to be consistent with the customer's testing method, a small number of domestic manufacturers current use the contact angle method. Namun, ini metode adalah sangat terpengaruh oleh berbagai faktor, mengukur instrumen dan pengukuran metode, dan pengukuran data diperoleh bisa hanya be digunakan sebagai a referensi. At sekarang, paling produsen penggunaan permukaan dyne nilai pengukuran metode.
Dyne value is a popular name. To be precise, it should be the surface tension coefficient. It mainly expresses the size of surface tension, that is, the force pulling each other between two adjacent parts of the liquid surface within unit length. The unit of surface tension is N/m in the SI system, but dyn/cm (dyn/cm) is still commonly used, 1dyn/cm=1mN/m. Umumnya, the wettability of finished aluminium foil is required to be Greater than or equal to 32mN/m.
Surface wetting tension is one of the most important technical indicators of battery foil. It affects the bonding quality of the coating, especially the coating firmness of the carbon-coated foil. When the dyne value is low, the aluminum foil and the adhesive material will not bond well. Defects such as tightness and missing paint. The dyne value of the aluminum foil surface must be >32 dyn/mm, and some carbon-coated products with high requirements may even reach 34 dyn/mm.
At present, although the national standards have clear regulations on the detection methods of dyne value, in the actual operation process, different companies and enterprises have different detection methods, so the detection results will often vary greatly. With the rapid development of the battery foil market, it is particularly important to further standardize and unify dyne value detection methods and judgment standards.
Pelat bentuk: Pelat bentuk adalah a profesional term in the non-ferrous logam industri, but in the baterai foil industri, it is disebut ketegangan. Ini perbedaan dalam nama adalah terutama jatuh tempo untuk berbeda industri. Tapi apakah it adalah pelat bentuk atau ketegangan, it mengungkapkan satu makna, yang adalah the kelurusan dari produk. In the baterai industri, dua istilah adalah digunakan untuk mengekspresikan produk bentuk kualitas: ketegangan dan melorot. Meskipun ini adalah a sepenuhnya tidak ilmiah istilah, it akan tidak perubahan sebagai itu telah menjadi diakui secara luas dalam baterai industri. For plate shape, the battery industry has formed its own set of standards and measurement devices, so When defining terms in in the battery industry, it changed the original definition of the aluminium processing industry.
Dalam pendek% 2c the tension is the shape of the plate, and the amount of sagging is the specified tension and the sagging amount of the edge of the product under the specified length.
Bentuk kualitas adalah a kunci teknis indikator untuk baterai foil. Dalam masa depan% 2c dengan pengembangan dari industri dan itu terus menerus peningkatan dari baterai produk akurasi% 2c pengguna akan memiliki lebih tinggi dan lebih tinggi persyaratan untuk bentuk dari aluminium foil produk dari dari aluminium foil foil produk produk untuk terus menerus meningkatkan bentuk kualitas dari produk adalah an penting masalah menghadap the aluminium foil industri.
