Difficulties in the power lithium battery industry-lithium ion battery diaphragm technology

The progress of human society is inseparable from the efforts of all walks of life in society, and the upgrading of various electronic products is inseparable from the efforts of our designers. In fact, many people do not understand the composition of electronic products, such as lithium. Ion battery separator. Lithium-ion battery diaphragm technology is currently a pain point in my country's power lithium-ion battery industry. Among the lithium-ion battery materials, positive and negative electrode materials and electrolytes have basically reached domestic production, but the separator started late and the technology maturity of domestic companies is not high. Although the localization rate of lithium-ion battery separators in my country has been rising in recent years, it is important to occupy the low-end 3C battery separator market. The positioning rate of high-end partitions is still very low. High-end 3C batteries and power lithium-ion batteries still have a large number of separators. Rely on imports. As we all know, in the structure of lithium-ion batteries, the separator is one of the key inner layer components, which not only prevents the positive and negative electrodes from contacting, but also ensures the passage of electrolyte ions. Therefore, the quality of the separator will directly affect the capacity, cycle, and safety performance of the battery. A separator with excellent quality has an important purpose for improving the overall performance of the battery. The current common problem in household separators is the lack of consistency, which is mainly manifested as irregular defects, unqualified porosity, uneven thickness, pore distribution and pore size distribution. In terms of porosity and pore size distribution, the uniaxially stretched domestic pp diaphragm is relatively close to foreign products. The porosity of biaxially stretched pE membranes is generally lower than that of foreign products, and the pore size distribution is not ideal. These problems are the potential risks of the industry being 'subject to others'. If it cannot be resolved, it may limit the healthy development of my country's lithium-ion battery industry. The separator is one of the key components of lithium-ion batteries. The important material of the separator is a porous polymer membrane, including polyethylene and polypropylene. The separators for lithium-ion batteries have strict requirements on safety, permeability, porosity and thickness. The current common problems in household separators are inconsistencies, which are mainly manifested as irregular defects, unqualified pores, uneven thickness, pore distribution and pore size distribution. In terms of porosity and pore size distribution, the uniaxially stretched domestic pp diaphragm is relatively close to foreign products. The porosity of biaxially stretched pE film is usually lower than that of foreign products, and the pore size distribution is not ideal. These problems are the potential risks faced by the industry. If it cannot be resolved, it may limit the healthy development of my country's lithium-ion battery industry. Inside a lithium-ion battery, charged ions flow between the positive electrode and the negative electrode to form an electric current. The separator is located between the positive and negative electrodes inside the battery, which not only prevents direct contact between the positive and negative electrodes, but also ensures the smooth passage of electrolyte ions. Lithium-ion battery electrolyte is like a river, and lithium-ion is like a boat traveling on the river. The diaphragm is a dam around the waist. Each diaphragm hole is like a gate on a dam. Under normal conditions, ions will move freely to the positive electrode and the negative electrode. Charge and discharge cycle. At present, the preparation methods of lithium ion battery separators are mainly divided into wet method and dry method. my country’s lithium-ion battery separators have made major breakthroughs in dry process technology. However, in the field of wet process separators, domestic separator companies are limited by process, technology and other factors, their product level is still low, and production equipment relies heavily on imports. Like chips, high-end diaphragm technology also has a high threshold. It not only requires huge investment, but also a strong Ru0026D and production team, skilled process technology and high-level production line, and it will not be able to break through in a short time. However, the Sino-US trade war and the ZTE-Huawei incident have sounded a wake-up call for my country's manufacturing industry. Regarding the entire power lithium battery industry, it is urgent to break through the high-end lithium-ion battery diaphragm technology as soon as possible. High-end lithium-ion battery separator technology has a high threshold. It not only requires a huge investment, but also a strong Ru0026D and production team, proficient technology and high-level production line, and a breakthrough in a short time. However, the Sino-US trade war and the ZTE-Huawei incident have sounded a wake-up call for my country's manufacturing industry. Regarding the entire power lithium-ion battery industry, it is urgent to break through the high-end lithium-ion battery diaphragm technology as soon as possible.