Modeling and Simulation of Ion Immigration in Lithium-Ion Battery during Charging or Discharging
Date Issued
2011
Date
2011
Author(s)
Liu, Kong-Hsiang
Abstract
Electric vehicles and hand-held electronic devices have urgent demand for new technologies and new materials on Lithium-ion battery to provide more energy density and more power density. Modeling Lithium-ion battery to build a battery simulation system can assist the research works on developing the relevant technologies. Based on an electrochemical model of Lithium-ion battery cell, this thesis develops a battery simulation system to investigate the process of moving Lithium ions from the cathode via the electrolyte though the separator till reaching the anode. The battery simulation system enables examining local potential and ion concentration during charging or discharging. Researches on the fast charging, cell equalization, state-of-charge estimation, and state-of-health estimation may acquire variables from the battery simulation system to test the methods. Dedicating the model parameters and boundary conditions to a commercially available Lithium-Cobalt battery, the simulation results are confirmed with the test results of the battery. Applying to estimate the State of Charge (SoC) of the test battery, the battery simulation system is shown useful in assisting research works.
Subjects
Li-ion battery
electrochemical model
state-of-charge
battery simulation
Type
thesis
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