What is the difference between a wet-process separator and a dry-process separator for lithium batteries?

Comparison of the difference between the wet method and dry method of lithium battery a. Because the process is simple, the fixed asset investment is smaller than that of the wet method; however, it is difficult to control the temperature and other indicators of the dry method in the production process, and the wet method is simpler; b. The three-layer film can be made by the method, and the wet method can only be used as a single-layer film; (The advantage of the three-layer film is that the thermal shutdown temperature is 135 degrees, but the thermal stability temperature is 160 degrees, which can prevent thermal inertia. There is a space of 25 degrees. Safety) c. In addition to different production processes, dry and wet methods use different raw materials. The raw materials used in the dry method have good fluidity and low molecular weight, so the high temperature can only reach 135 degrees, and it will shrink when exposed to heat. The safety is not suitable for high-power and high-capacity batteries; the wet method uses non-flowing, high-molecular-weight raw materials. The thermal shutdown temperature can reach 180 degrees, which can ensure the safety of high-power lithium batteries; d. In terms of processing general lithium batteries, dry method has advantages, low cost, less pollution, and more uniform holes; high-power batteries have wet methods The main advantages are safety and low heat shrinkability. Advantages of lithium battery wet-process separator and dry-process separator The lithium battery wet-process separator is thin and not easy to tear, but the PE melting point is 135℃, which is less safe than dry-process separators. In addition, the raw materials and processing procedures are different, and the overall cost is higher than that of dry-process separators. Diaphragm: Dry-process diaphragm products have high melting point, better heat resistance, high pressure resistance and oxidation resistance, but related to wet-process diaphragms are thicker and easy to tear longitudinally, which requires higher process requirements for battery companies. Disclaimer: Some pictures and content of articles published on this site are from the Internet. Please contact to delete if there is any infringement.