Introduction to the prospects and development trends of the lithium battery separator industry

The diaphragm has a large number of tortuous micropores, which can effectively ensure the free passage of lithium ions to form a loop. At the same time, it can also prevent the positive electrode and the negative electrode from contacting through closed cells when the lithium battery pack is overcharged or the temperature is too high. To achieve the purpose of insulation. The material of the diaphragm is non-conductive, and its physical and chemical properties have a great influence on the performance of the battery. Different types of batteries have different separators. According to different processing techniques, in general, there are two distinctions between dry-process diaphragm and wet-process diaphragm. The dry process is mainly used in China, while the wet process is more common in foreign countries. The development status of domestic separators in recent years, with the successful localization of separators, the price has dropped greatly, and the proportion of the total cost of lithium battery materials has also dropped a lot, generally ranging from 7% to 7%. About 15%. In the lithium iron phosphate battery pack, since the unit cost of the positive and negative materials is relatively low, the proportion of the separator in the overall cost is higher than that of other types of lithium batteries, accounting for 15% about. Among the constituent materials of lithium battery packs, the technical content required by the separator and the gross profit margin are relatively high. Among these materials, the diaphragm is the last material to achieve localization. In recent years, with domestic research institutes' breakthroughs in lithium battery preparation technology, coupled with national policy support, and large amounts of capital investment by processing companies, my country's global market share of lithium battery separators has rapidly increased. Compared with foreign countries, in the past, the processing technology of domestic diaphragm processing companies was mainly based on dry stretching. However, in recent years, with the continuous improvement of domestic diaphragm companies in wet processing technology, the output and performance of wet diaphragms are getting closer and closer to foreign levels. With the development of technology, domestic diaphragm companies have expanded their production of wet-process diaphragms, and the domestic diaphragm market has undergone great changes compared with the previous ones. In China, the largest demand for separators is the power lithium-ion battery market. Relevant personnel conducted calculations on the China Disabled Persons' Federation and the total demand for the domestic diaphragm. Last year, the domestic diaphragm production was generally close to the demand. Considering that the demand for wet-process diaphragms in the market has grown significantly faster than that of dry-process diaphragms, the supply and demand pattern of wet-process diaphragms on the market is still tight. From this year onwards, according to calculations, the total output of domestic diaphragms will exceed the demand when the companies are in production smoothly. Prospects of the domestic separator industry. With the increase in the supply of lithium battery separators on the market, the future competition in the separator market will intensify, especially the production of wet-process separators will be greatly improved, which will affect the wet and dry separators. The price of the products puts up greater pressure. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.