摘要
为了改善锂电池极片在烘干过程中出现变形的问题,以及利用热空气压力差使极片悬浮的变形问题,从锂电池极片的角度探索极片的变形规律,从根本上解决极片的干燥问题。采用非线性有限元方法研究极片的力学特性,着重了解极片在不同气压下的变形情况,并基于修正的拉格朗日描述系统推导出的三角形平面单元增量平衡方程分析几何非线性问题。在此基础上,分析了极片在类似简支梁状态下受到的外部压力及自身重力作用下的横向静变形情况。比较计算得出的变形数据与实验测得的具体数值,发现设计的计算方法得出的结果与实验数值接近,证明在极片静止变形中,使用力学特性方法研究极片的变形非常有效。研究结果可为设计锂电池的烘干设备提供科学合理的依据。
In order to improve the problem of deformation of lithium battery electrodes during the drying process,as well as to use the pressure difference of hot air to suspend the deformation of the electrodes,the deformation law of the electrodes is explored from the perspective of lithium battery electrodes,fundamentally solving the drying problem of the electrodes.Using nonlinear finite element method to study the mechanical properties of polar plates,focusing on understanding the deformation of polar plates under different air pressures,and analyzing geometric nonlinear problems based on the incremental equilibrium equation of triangular plane elements derived from the modified Lagrangian description system.On this basis,the lateral static deformation of the polar plate under external pressure and self gravity in a state similar to a simply supported beam was analyzed.Comparing the calculated deformation data with the specific experimental values,it was found that the results obtained by the designed calculation method were close to the experimental values,proving that the use of mechanical property methods to study the deformation of polar plates in static deformation is very effective.The research results can provide a reasonable scientific basis for designing drying equipment for lithium batteries.
作者
刘志辉
马力智
张家豪
张志坚
陈飞
LIU Zhihui;MA Lizhi;ZHANG Jiahao;ZHANG Zhijian;CHEN Fei(Mechanical and Energy Engineering,Shaoyang University,Shaoyang,Hunan 422000,China)
出处
《自动化应用》
2024年第5期122-125,共4页
Automation Application
基金
邵阳学院科学研究项目(CX2022SY042)。
关键词
锂电池极片
静变形
非线性有限元
lithium battery electrodes
static deformation
nonlinear finite element
