论文标题
芯壳增强了LifePo的单个粒子模型$ _4 $电池
Core-shell enhanced single particle model for LiFePO$_4$ batteries
论文作者
论文摘要
在本文中，提出了一种用于利用颗粒锂插入和去干扰动力学的新型电化学模型。从增强的单个粒子模型开始，引入了质量传输和平衡方程以及合适的边界条件，以模拟正极材料中静态和划界期间的相变现象。富含锂和锂的相位是使用核心壳原理建模的，其中核心成分用壳体组成封装。使用有限差方法将描述相变的耦合部分微分方程离散化，从中，从中获得了以状态空间表示形式编写的普通微分方程系统。最后，使用来自49AH LFP小袋单元的实验数据进行模型参数识别。
In this paper, a novel electrochemical model for LiFePO$_4$ battery cells that accounts for the positive particle lithium intercalation and deintercalation dynamics is proposed. Starting from the enhanced single particle model, mass transport and balance equations along with suitable boundary conditions are introduced to model the phase transformation phenomena during lithiation and delithiation in the positive electrode material. The lithium-poor and lithium-rich phases are modeled using the core-shell principle, where a core composition is encapsulated with a shell composition. The coupled partial differential equations describing the phase transformation are discretized using the finite difference method, from which a system of ordinary differential equations written in state-space representation is obtained. Finally, model parameter identification is performed using experimental data from a 49Ah LFP pouch cell.
