[Oral Presentation]基于DEM-FEM耦合的辊压工艺颗粒致密化过程模拟及集流体接触损伤行为研究

Organized By

Hohai University

Monash University

Co-organized by

Southeast University

Jiangxi University of Science and Technology

Northeast University

DUT-BSU Scientific Research and Innovation Center

Suzhou University of Science and Technology

State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment

Sponsoring agency

KELI SDEM Software (Dalian) Co., Ltd.

Sugon Smart Computing Information Technology Co., Ltd.

Beijing Paratera Technology Co., Ltd.

Simpop Information Technology Co., Ltd.

Important Dates

Conference Announcement

December 2023, release First Round Announcement
Abstract Submission Deadline
March 31^th, 2024
Paper Submission Deadline
April 30^th, 2024
Registration
From January 1^st, 2024
Conference Schedule
May 31^st (Friday), 2024 On-Site Registration
June 1^st to 3^rd, 2024 Conference

基于DEM-FEM耦合的辊压工艺颗粒致密化过程模拟及集流体接触损伤行为研究

ID：67 Submission ID：196 View Protection：ATTENDEE Updated Time：2024-04-09 22:34:44 Hits：901 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

Session：[No Session] » [No Session Block]

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Abstract

辊压作为锂离子电池制造过程中的重要步骤，会对极片微结构产生显著影响。在辊压过程中，活性颗粒会逐渐致密，并压入金属箔中进而损坏集流体。在此，我们研究了辊压后活性层微结构的演化、集流体表面形态和拉伸性能的变化。通过结合压缩试验、拉伸实验和模拟，建立了不同压力下极片孔隙率的预测模型，揭示了压缩力导致集流体拉伸强度降低的破坏机制。具体而言，提出了离散元法（DEM）与有限元法（FEM）相结合的 DEM-FEM 耦合方法，以表征活性颗粒压入后集流体的力学行为。研究结果表明，颗粒的力学特性与几何分布会显著影响辊压过程，并且随着压缩力的增加，集流体更容易发生断裂。本项研究工作可以为电极的制造及优化提供指导。

Keywords

锂离子电池,辊压,离散元,有限元,孔隙率,损伤

Speaker

宋严杰

北京理工大学

Submission Author

宋严杰北京理工大学

贺春旺北京理工大学

陈浩森北京理工大学

Sponsored By

Hohai University

Panel of Computational Mechanics on Granular Materials, Working Party of Computational Mechanics, Chinese Society of Theoretical and Applied Mechanics

Jiangsu Society of Theoretical and Applied Mechanics