The progress of human society is inseparable from the efforts of all walks of life in society, and the replacement 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 separators. Lithium-ion battery separator technology is currently a pain point in my country's power lithium-ion battery industry. Among lithium-ion battery materials, positive and negative electrode materials and electrolytes have basically reached domestic production, but the separator started late, and the technical 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 separators is still very low. There are still a large number of separators for high-end 3C batteries and power lithium-ion batteries. Rely on imports.
As we all know, in the structure of lithium-ion batteries, the diaphragm is one of the key internal 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 diaphragm will directly affect the battery's capacity, cycle, safety performance and other characteristics. High-quality diaphragms are important for improving the overall performance of batteries.
The common problem in current household diaphragms is the lack of consistency, which is mainly manifested in 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 membrane is generally lower than that of foreign products, and the pore size distribution is not ideal. These problems are potential risks for the industry to be "controlled by others". If they cannot be solved, it may limit the healthy development of my country's lithium-ion battery industry. The diaphragm is one of the key components of lithium-ion batteries. The main material of the diaphragm is a porous polymer membrane, including polyethylene and polypropylene. The diaphragm used in lithium-ion batteries has strict requirements on safety, permeability, porosity and thickness.
Common problems in current household diaphragms are inconsistency, mainly manifested in irregular defects, unqualified pores, uneven thickness, pore distribution and pore size distribution. In terms of porosity and pore size distribution, uniaxially stretched domestic PP diaphragms are 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 potential risks facing the industry. If they cannot be solved, they may restrict the healthy development of my country's lithium-ion battery industry.
Inside a lithium-ion battery, charged ions flow between the positive and negative electrodes 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. The lithium-ion battery electrolyte is like a river, and lithium ions are like a boat sailing on the river. The diaphragm is a dam around the waist. Each diaphragm hole is like a gate on the dam. Under normal circumstances, ions move freely to the positive and negative electrodes. Charge and discharge cycle. At present, the preparation methods of lithium-ion battery diaphragms are mainly divided into wet and dry methods. my country's lithium-ion battery diaphragms have made major breakthroughs in dry processes, but in the field of wet diaphragms, domestic diaphragm companies are limited by many factors such as process and technology, and the product level is still low, and production equipment relies heavily on imports. Like chips, high-end diaphragm technology also has a high threshold. It requires not only huge investment, but also a strong R&D and production team, skilled process technology and high-level production lines, 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 the alarm 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 separator technology as soon as possible.
High-end lithium-ion battery separator technology has a very high threshold. It requires not only huge investment, but also a strong R&D and production team, proficient technology and high-level production lines, and a breakthrough in a short period of time. However, the Sino-US trade war and the ZTE Huawei incident have sounded the alarm for my country's manufacturing industry. For the entire power lithium-ion battery industry, it is urgent to break through the high-end lithium-ion battery separator technology as soon as possible.
Disclaimer: The articles published on this website are from the Internet and do not represent the views of this website.
