锂离子电池切分机构仿真与试验研究

与传统的整体破碎工艺相比而言,锂离子电池机械化拆解工艺可以在预处理阶段实现电芯和其他部分的分离,降低化学萃取成本,提高贵重金属元素的回收效率,具有重要的研究意义。为此设计了一种可以适应不同型号锂离子电池的切分机构,并提出了将可视为复杂装配下的复合材料的锂离子电池材料模型替代成简单均质的Johnson-Cook本构材料模型的等效替代理论,并通过理论计算、Abaqus仿真以及试验研究的方法进行分析,结果表明:所设计的切分机构能够完成锂离子电池的切分,切口和变形情况均满足要求,提出的等效替代理论可以满足切分试验的要求,并得到参数修正后的本构模型方程用于指导切分仿真计算。

Simulation and Experimental Study on the Cutting Mechanism of Li-Ion Battery

Compared with the traditional overall crushing process,the mechanical disassembly process of Li-ion battery can realize the separation of its’core and other parts during the pretreatment phase,reduce the chemical extraction cost and improve the recovery efficiency of precious metal elements which has great research significance.A cutting mechanism which can adapt to different types of Li-ion batteries is designed.The equivalent substitution theory of the simple homogeneous Johnson-Cook constitutive model is proposed to replace the lithium ion battery material model which can be regarded as a composite material with complex assembly.Through theoretical calculation,Abaqus simulation and experimental study,the results show that:The designed cutting mechanism can complete the cutting of Li-ion batteries,with both the incision and the deformation meeting the requirements.The proposed equivalent alternative theory can meet the requirements of the shard test.The modified constitutive model equation is obtained to guide the cutting simulation calculation.