卷绕电芯负极片褶皱成因分析及扼制应用研究

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中图分类号：TB497 文献标志码：B 文章编号：1671-5276（2025）03-0311-04

Factor Analysis and Control Application Research on Wrinkling of Negative Plate of Winding Battery Cell

YAN Zhaofeng，WEI Yongchao，PAN Yuliang（Luoyang Storage and Transformation Systems Co.，Ltd.，Luoyang 471934，China）

Abstract：Winding isakeyprocessinthemanufacturingoflithiumionbatery，whichcombinesthepositiveandnegative electrodeplateswiththediaphragm，and thefoldof thenegativeelectrode plateof thecellmaycause thescrappingof both positiveandnegativeelectrodeplatesanddiaphragms，significantlyaffecting manufacturingcosts，batteryperformanceand safety.The paper analyzes thecauseoffolding，and studies the suppesion fromthree main aspects：pre-winding，tensionand cold pressing.Theconclusionisthatthefoldingcan berestrainedbyreasonablefeding pressure，relativelysmallpre-winding number，suffcientlylargecoldpresureandsmalltensiongradientofdiaphragm.roductionpracticesverifythatthresearchcan improvecel quality，increase production efficiency reduce scrap rate，and has certain application prospects.

Keywords：lithium ion battery； folding；cause；tension；cold pressing pressure；preroll

0 引言

叠片锂电池工艺复杂、极片断面毛刺多、效率低，而卷绕生产速度快，连续性好，对设备要求低，电池一致性更容易控制[]。（剩余4663字）