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In addition, if you want to add a sealing function, you can also add an additional 2-3 yuan/square meter of funds. However, energy storage and power lithium-ion batteries should not be equipped with enclosed battery functions. Therefore, the gaps in non-woven fabrics are suitable for large batteries, and are most suitable for energy storage and power lithium-ion batteries with large and long-term requirements. At present, the gap in non-woven fabrics is still in the stage of small-scale production and has not been widely used. However, many battery manufacturers have shown great interest in this, and some are in the pilot process.

Regarding the cost of non-woven gaps

Generally speaking, the price of PET fiber is 20-150 yuan/kg, with the most expensive being over 600 yuan/kg. PI fiber costs 30-50 yuan/kg. The cost difference of non-woven lithium-ion battery fibers exceeds half. If 10g fibers are used for 1 square meter, the cost of general fibers is about 0.2-1.5 yuan/square meter, which is roughly equivalent to the traditional cost. If micro fibers are used, the cost is about 5-6 yuan/square meter.

So the cost of separating nonwoven fabrics varies according to the changes in fiber composition. The cost of using coarse fibers is very low, while the cost of using nanoscale fibers is very high. There are many ways to reduce costs, such as improving production power, increasing yield, improving existing production processes, and not blindly pursuing thin thickness.

Conclusion: The isolation information of lithium-ion batteries can be divided into categories such as woven film, non-woven film (non-woven fabric), microporous film, composite film, isolation paper, roller film, etc. At present, domestic and foreign companies have achieved many results in the research and application of non-woven fabric separation and functional optimization, but there have been no successful cases of large-scale commercial application of lithium-ion batteries.

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