基于有限元的热力耦合场匣钵运动分析与优化

doi:10.19799/j.cnki.2095-4239.2023.0496

摘要/Abstract

摘要：

为解决装有锂离子电池正极材料的匣钵在辊道窑烧结过程中易出现异常横向运动使匣钵破损的问题，本研究通过分析匣钵异常运动特性的影响因素对其进行优化。首先，利用Solidworks软件建立辊道-匣钵传动系统简化模型，对匣钵进行受力分析，推导出匣钵发生异常横向运动的原因是辊棒的弹性变形；其次，通过Abaqus软件进行有限元仿真，对比分析热力耦合场和重力场下匣钵的位移曲线以及辊棒的受力情况。结果表明，与重力场相比，热力耦合场的辊棒弹性变形量更大，且热力耦合场匣钵横向位移在0～1 s内相对重力场增大，而在1～5 s内相对重力场减小，说明在温度和重力共同作用下所引起的辊棒弹性变形是导致匣钵异常横向运动的主要原因。在此基础上，设计了一种匣钵传动机构，包括辊棒支撑机构、匣钵夹紧装置及匣钵挡齐装置，并通过对比生产验证了改进机构的可行性。本研究对在辊道窑烧结过程中匣钵异常横向运动的影响因素进行分析并提供了一种改进机构，有助于推进锂离子电池正极材料生产设备的发展。

关键词: 锂离子电池, 正极材料, 辊道窑, 匣钵, 热力耦合, 有限元法

Abstract:

To address the issue of abnormal transverse movement in sagger containing cathode materials of lithium-ion batteries during the sintering process in a roller kiln, leading to the sagger to break, this study optimizes the motion process by analyzing factors influencing the abnormal motion characteristics of the sagger. First, Solidworks is used to establish a simplified model of the roller conveyor-sagger transmission system. Force analysis of the sagger reveals that the abnormal transverse movement of the sagger is caused by the elastic deformation of the roller bar. Second, finite element simulation using Abaqus is conducted to compare and analyze the displacement curve of the sagger in the thermo-mechanical coupling field and the gravity field, along with the force exerted on the roller bar. Results show that the thermo-mechanical coupling field induces greater elastic deformation of the roller bar compared to the gravitational field. The transverse displacement of the sagger in the thermo-mechanical coupling field increases relative to the gravity field from 0 to 1 s, while it decreases relative to the gravity field from 1 to 5 s. This indicates that the joint action of temperature and gravity-induced elastic deformation is the primary cause of the abnormal transverse motion of the sagger. On this basis, a sagger transmission mechanism is designed, including the roller bar support mechanism, the sagger clamping device, and the sagger blocking device. The feasibility of the improved mechanism is verified through comparative production. This study analyzes factors affecting the abnormal transverse motion of the sagger during the sintering process in the roller kiln and provides an improved mechanism, contributing to the advancement of cathode material production equipment for lithium-ion batteries.

Key words: lithium-ion battery, cathode material, roller kiln, sagger, thermo-mechanical coupling, finite element method

中图分类号:

TH 132

彭可, 张志成, 胡有章, 张旭辉, 周稼辉, 李彬. 基于有限元的热力耦合场匣钵运动分析与优化[J]. 储能科学与技术, 2024, 13(2): 634-642.

Ke PENG, Zhicheng ZHANG, Youzhang HU, Xuhui ZHANG, Jiahui ZHOU, Bin LI. Finite element-based motion analysis and optimization of sagger in thermo-mechanical coupling field[J]. Energy Storage Science and Technology, 2024, 13(2): 634-642.

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