Multiphysics topology optimization of a multifunctional structural battery composite
Multiphysics topology optimization of a multifunctional structural battery composite
复制标题
DOI：
10.1007/s00158-023-03490-3
复制
发表时间：
2023-02
影响因子：
3.9
通讯作者：
Reza Pejman;A. Najafi
中科院分区：
文献类型：
--
作者：
Reza Pejman;A. Najafi
结构电池复合材料（SBC）是一类新型的多功能材料，具有作为锂离子电池工作的能力，可以承受机械载荷。本研究的动机是解决SBC开发中的主要挑战之一，这是其电解质的结构和电气需求的强烈冲突（即，高硬度和高离子传导性）。此外，存在电化学循环不应导致SBC过热的设计要求。本研究的新奇在于开发了一种高效的多目标多物理场密度拓扑优化框架，该框架考虑了电化学/热/结构物理学，以确定结构电池电解质（SBE）的优化设计。优化方法被定义为解决一个多目标问题，最大限度地提高有效离子电导率和最小限度地遵守SBE。该问题受到体积分数和最高允许温度的约束。利用归一化法向约束的方法来生成多目标问题的Pareto前沿曲线。所提出的方法是计算效率，由于利用低保真度电阻网络的方法，电化学模块和并行化的工作量，使用便携式，可扩展的工具包，科学计算和消息传递接口。几个数值例子解决了不同的负载情况下，所提出的方法的适用性。结果表明，所提出的方法提供了一个更好的理解所需的微观结构设计的SBE的结构电池复合材料的性能改善。
The structural battery composite (SBC) is a novel class of multifunctional materials with the ability to work as a lithium-ion battery that can withstand mechanical loads. The motivation of this study is to address one of the major challenges in the development of SBCs, which is a strong conflict in the structural and electrical demands for its electrolyte (i.e., high stiffness and high ionic conductivity). Furthermore, there is a design requirement that the electrochemical cycling should not result in overheating of the SBC. The novelty of this study is the development of an efficient multi-objective multiphysics density-based topology optimization framework that considers electrochemical/thermal/structural physics to identify the optimized design of a structural battery electrolyte (SBE). The optimization methodology is defined as solving a multi-objective problem of maximizing effective ionic conductivity and minimizing compliance of SBE. The problem is subjected to constraints on volume fraction and the maximum allowable temperature. The normalized-normal-constraint approach is utilized to generate a Pareto-front curve for this multi-objective problem. The proposed method is computationally efficient owing to utilizing a low-fidelity resistance network approach, for the electrochemical module and parallelizes the workload using portable, and extendable toolkit for scientific computing and message-passing interface. Several numerical examples are solved to demonstrate the applicability of the proposed methodology under different loading scenarios. The results reveal that the proposed methodology provides a better understanding of the required microstructural design of SBE for the performance improvement of structural battery composites.