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SINO TECHNOLOGY

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 .

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SUNBEAM

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

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GREEN POWER

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

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DATAPOWER

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.

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SEONG-HEE

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

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STD

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.

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6LR61 alkaline battery

release time:2024-09-14 Hits: Popular:AG11 battery

　　Formation mechanism of roll bending in lithium batteries

　　1. Warping caused by uneven edge thickness

　　During the coating process of lithium battery electrodes, the active material surface density in the edge region is higher than that in the middle region, resulting in the edge thickness being several micrometers or more than ten micrometers larger than that in the middle region. During the rolling process, areas with thicker edges will bear greater rolling force, resulting in uneven transverse density of the pole piece during rolling compaction, which in turn causes pole piece warping. In addition, the high surface density of active substances in the edge region may also lead to excessive rolling of the foil during the rolling process, resulting in warping deformation and small cracks, further exacerbating the warping phenomenon.

　　2. Improper rolling process parameters:

　　Improper settings of rolling process parameters such as pressure, speed, and temperature of the rolling wheel are also important reasons for the warping of the polarizer. Excessive rolling pressure can cause excessive compression and deformation of the pole piece; Uneven rolling speed can cause uneven force on the polarizer, resulting in local warping; Improper temperature control of the roller can affect the thermal plasticity and flowability of the material, thereby affecting the compaction effect of the polarizer.

　　3. Equipment factors:

　　Poor rigidity stability, coaxiality error, cylindricity error, and surface roughness of rolling equipment may also cause the polarizer to warp during the rolling process. In addition, equipment wear and inaccurate calibration can also lead to uneven distribution of rolling pressure, affecting the compaction effect of the polarizer.

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