Why does my country's lithium battery separator technology rely on imports?

Why does my country's lithium battery diaphragm technology rely on imports? Why does my country's lithium battery barrier technology rely on imports? Although my country's lithium battery market is booming, my country is not a big country with a lithium battery gap, and we are still far from the world's first-class level, especially It is the high-end battery gap data that still relies on imports. In the four major lithium battery centers, the positive and negative data and electrolyte have been localized, and the only gap is still the weak board. Why does my country's lithium battery barrier technology rely on imports? Why does my country's lithium battery barrier technology rely on imports? my country has made major breakthroughs in lithium battery dry process technology, and now has a world-class processing level. However, in the field of wet barriers, domestic barrier companies are restricted by many factors such as technology and skills, and their product levels are still relatively low. Their processing equipment mainly depends on imports. The thickness, strength, and porosity consistency of my country's lithium battery gap products are far from those of foreign products, and the consistency of product batches needs to be improved. As the core information of soft pack batteries, aluminum-plastic film is much more difficult to process than gap technology, positive electrode technology, negative electrode technology and electrolyte technology, one of the three major technologies in the lithium battery industry. In terms of product performance, my country’s aluminum-plastic film products have a large gap with foreign products, which is mainly reflected in: aluminum foil surface treatment technology is backward and pollution is large; aluminum foil after water treatment will undergo hydrogen embrittlement, resulting in poor plastic resistance of aluminum foil; aluminum foil appearance rigidity Insufficient, poor yield; polypropylene and aluminum foil with high thermal conductivity are easy to curl and crystallize in layers. The domestic adhesive formulation process is poor, and the problem of delamination and peeling is prone to occur. From a business perspective, the United States has strong research and design capabilities, and is still leading the development of original and innovative lithium batteries and central data; Japan, as a major battery data processing country, has strict processing standards and can be the first to process new finished batteries. At present, the world's best lithium battery gap information comes from two Japanese companies, Asahi Chemical and Dongjiao Chemical, and 90% of the domestic lithium battery aluminum-plastic film market is also exclusively supplied by Japanese manufacturers such as Showa Denko. Compared with Japan and South Korea, my country’s low-end lithium battery products have more advantages, mainly because labor and raw materials are relatively cheap, but in some high-end products, especially related to the safety center information and processing process of lithium batteries, There is still a great distance. Key data such as the lack of central patents and inadequate barriers have not only become a pain point for domestic lithium batteries, but also hindered domestic lithium battery companies from going out. The safety barrier of lithium batteries has strict requirements on permeability, porosity and thickness. Compared with Japan, my country's high-end gap is obvious. The consistency of domestic gap products is not high, and there are problems such as substandard porosity, uneven thickness, pore dispersion, and pore dispersion. Domestic lithium batteries have stagnated: most of the high-end gap is still dependent on imports. The development of lithium batteries must get rid of the shackles, obstacles and other high-end data cannot escape! Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the structural characteristics of cylindrical lithium batteries?