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Two-dimensional electrochemical–thermal coupled modeling of cylindrical LiFePO4 batteries
Ist Teil von
Journal of power sources, 2014-06, Vol.256, p.233-243
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2014
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
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 LiFePO4 battery 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.
•A two-dimensional electrochemical–thermal model for a cylindrical LiFePO4 battery.•The effects of the battery current collecting tabs.•The distributions of potential and reaction rates during discharge process.•The distribution of the heat generation rates and the temperature within the battery.