Research progress on discrete element method simulations of lithium-ion battery electrode calendering process

SI Lina; WU Qifeng; HUANG Rong

doi:10.19996/j.cnki.ChinBatlnd.2026.01.013

Abstract：Lithium-ion batteries are currently one of the main power sources for electric vehicles,which have the advantages of high energy density,low self-discharge rate,fast charging speed,and environmental friendliness.The demand for high range of electric vehicles has put higher demands for lithium-ion batteries,such as higher energy density and longer cycle life.Electrodes are the core component of a battery,the preparation processes of which,such as the calendering process,directly determines the energy density and service life of the battery product.The study of the deformation mechanism of electrodes during the calendering process,which is helpful to achieve precise control of the pore structure and compaction density of electrode materials,is of great significance for improving the performance of lithium-ion batteries.The raw materials of electrode,such as active substances and additives,are in granular form.Therefore,a discrete element model can be used to predict the interactions between particles,porosity,and heat transfer characteristics of the electrode during the calendaring process.This article reviews the current research status of discrete element method simulations for calendering process of lithium-ion battery electrodes.These research works utilized the discrete element method to establish models for predicting the compaction characteristics of the calendering process.The compaction characteristics of materials during the calendaring process were investigated and the key factors affecting compaction performance were revealed.The research results can give a guide for the design of the electrode calendering process.