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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:2023-10-26 Hits: Popular:AG11 battery
Effect of pretreatment process on performance of lithium iron phosphate battery
Lithium iron phosphate batteries have become the focus of many battery companies and automobile manufacturing companies due to their good safety and comprehensive electrochemical properties. If there are trace amounts of moisture and free acid in the organic electrolyte of a lithium-ion battery, it will react with the lithium salt in the electrolyte to form fluoride and deposit on the surface of the negative electrode. The existence of this deposit will play an important role in the formation of the SEI film. .
Lithium iron phosphate batteries have become the focus of many battery companies and automobile manufacturing companies due to their good safety and comprehensive electrochemical properties. If there are trace amounts of moisture and free acid in the organic electrolyte of a lithium-ion battery, it will react with the lithium salt in the electrolyte to form fluoride and deposit on the surface of the negative electrode. The existence of this deposit will play an important role in the formation of the SEI film. .
However, excessive water and acid content will not only cause the decomposition of the lithium salt LiPF6, but also damage the SEI film. The reaction rate between LiPF6 and water increases as the temperature increases. The reaction rate constant at 40°C is 3 to 4 times that at 20°C, and at 60°C it increases to 8 to 12 times that at 20°C. The decomposition of lithium salt and the generation of HF gas will cause the battery cycle life to decay, cause serious gas swelling, and pose certain safety issues.
This article focuses on the lithium iron phosphate 20Ah power battery with high moisture content and difficult to dry. It uses the SEI film-forming reaction that occurs on the electrode surface during the first charge to remove the moisture inside the battery, and studies the effect of different pretreatment processes on battery moisture removal. Investigate the effects of preformation process and high-temperature storage on battery performance (capacity, pole piece status, battery thickness, and internal resistance).
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