The state of charge of electrodes and its effects on lithium-iron-phosphate battery simulation
Journal
ECS Transactions
Journal Volume
72
Journal Issue
11
Pages
1-10
ISBN
9781607685395
Date Issued
2016
Author(s)
Abstract
Accuracy of simulated LFP battery characteristics, including the cell voltage, lithium concentration distribution, and cell capacity, are highly related to the solid-phase initial concentrations of each individual electrode. To determine the initial concentrations of individual electrodes of the LFP battery, equilibrium potentials are experimentally measured by low-rate discharge while the characteristic points are calculated by identifying critical points of the discharge curves. The LFP battery model with such formally determined concentrations is validated by comparing the simulated discharge curves with experimental measurements under various loading demands. Further understanding of the effects of lithium loss during activation process with experiments and model simulation can assist the LFP battery design and optimize fabrication. © The Electrochemical Society.
SDGs
Other Subjects
Battery management systems; Charging (batteries); Electric discharges; Electrodes; Iron compounds; Lithium compounds; Characteristic point; COMSOL; Concentration distributions; Electrochemical modeling; Equilibrium potentials; Initial concentration; Lithium iron phosphates; Simulated discharges; Lithium-ion batteries
Type
conference paper