Two-dimensional electrochemical-thermal coupled modeling of cylindrical LiFePO4 batteries
Two-dimensional electrochemical-thermal coupled modeling of cylindrical LiFePO4 batteries
复制标题
圆柱形 LiFePO4 电池的二维电化学热耦合建模
DOI：
10.1016/j.jpowsour.2014.01.070
复制
发表时间：
2014
影响因子：
9.2
通讯作者：
Yang Lixin
中科院分区：
文献类型：
--
作者：
Xu Meng;Zhang Zhuqian;Wang Xia;Jia Li;Yang Lixin
锂离子电池在放电过程中的电位分布和反应速率分布对电池的热特性有很大的影响。建立了圆柱形LiFePO 4电池的二维电化学-热模型，该模型综合考虑了电池的质量守恒、电荷守恒、能量守恒和电池电化学动力学。该模型还包括电池电流收集标签。模拟结果验证了恒电流放电过程中的电化学性能和热行为。模拟结果与实验数据吻合较好。发现圆柱形电池上的正集流片和负集流片的放置对其电势和局部反应速率的分布具有显著影响，这因此影响热产生速率，并且因此影响电池内的温度分布。
The distributions of potential and reaction rates in a lithium ion battery during discharge process have great influences on the battery thermal characteristics. A two-dimensional electrochemical–thermal model has been developed for a cylindrical LiFePO4battery by coupling the mass, charge, and energy conservations as well as the cell electrochemical kinetics. The model also includes battery current collecting tabs. The modeling results are validated for both the electrochemical performance and thermal behavior during galvanostatic discharge process. The modeling results agree well with the experimental data. The placement of the positive and the negative current collecting tabs on the cylindrical battery was found to have a significant effect on the distributions of its potential and local reaction rates, which therefore affect heat generation rates, and thus the distribution of the temperature within the battery.