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Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2024-09-20 Hits: Popular:AG11 battery
What is the current status of 21700 battery diaphragm technology?
21700 battery diaphragm technology is a pain point in my country's power 21700 battery industry. Among 21700 battery materials, positive and negative electrode materials and electrolytes have basically been domestically produced, while diaphragms started late and domestic companies have low technical maturity. Although the localization rate of 21700 battery diaphragms in my country has been increasing in recent years, it mainly occupies the low-end 3C battery diaphragm market, and the localization rate of high-end diaphragms is still very low. High-end 3C batteries and power 21700 battery diaphragms still rely heavily on imports.
It is reported that diaphragms are a high-value-added material with the highest technical barriers among lithium battery materials, accounting for about 15% of the cost of lithium-ion batteries. The technical difficulty lies in the engineering technology of pore making, matrix materials, and manufacturing equipment. The common problems of domestic lithium battery diaphragms are low consistency, mainly irregular defects, substandard porosity, uneven thickness, pore distribution, and pore size distribution. The porosity and pore size distribution of domestic PP diaphragms stretched in one direction are close to those of foreign products; the porosity of PE diaphragms stretched in two directions and in steps is usually lower than that of foreign products, and the pore size distribution is also not ideal.
In the field of wet-process diaphragms, domestic diaphragm companies are limited by many factors such as process and technology, and the product level is still low, and a large amount of processing equipment relies on imports. Like chips, high-end diaphragm technology has a very high threshold. It not only requires huge investment, but also requires a strong R&D and processing team, sophisticated process technology and high-level processing lines, and it is not possible to break through in a short time.
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