TY - JOUR
T1 - Solid-state diffusion limitations on pulse operation of a lithium ion cell for hybrid electric vehicles
AU - Smith, Kandler
AU - Wang, Chao Yang
N1 - Funding Information:
This work was funded by the U.S. Department of Energy, Office of FreedomCAR and Vehicle Technologies through Argonne National Laboratory (Program Manager: Lee Slezak). We thank Aymeric Rousseau and Argonne National Laboratory for providing battery experimental data as well as Dr. Marc Doyle and Dr. Venkat Srinivasan for helpful discussions.
PY - 2006/10/20
Y1 - 2006/10/20
N2 - A 1D model based on physical and electrochemical processes of a lithium ion cell is used to describe constant current and hybrid pulse power characterization (HPPC) data from a 6 Ah cell designed for hybrid electric vehicle (HEV) application. An approximate solution method for the diffusion of lithium ions within active material particles is formulated using the finite element method and implemented in the previously developed 1D electrochemical model as an explicit difference equation. Reaction current distribution and redistribution processes occurring during discharge and current interrupt, respectively, are driven by gradients in equilibrium potential that arise due to solid diffusion limitations. The model is extrapolated to predict voltage response at discharge rates up to 40 C where end of discharge is caused by negative electrode active material surface concentrations near depletion. Simple expressions are derived from an analytical solution to describe solid-state diffusion limited current for short duration, high-rate pulses.
AB - A 1D model based on physical and electrochemical processes of a lithium ion cell is used to describe constant current and hybrid pulse power characterization (HPPC) data from a 6 Ah cell designed for hybrid electric vehicle (HEV) application. An approximate solution method for the diffusion of lithium ions within active material particles is formulated using the finite element method and implemented in the previously developed 1D electrochemical model as an explicit difference equation. Reaction current distribution and redistribution processes occurring during discharge and current interrupt, respectively, are driven by gradients in equilibrium potential that arise due to solid diffusion limitations. The model is extrapolated to predict voltage response at discharge rates up to 40 C where end of discharge is caused by negative electrode active material surface concentrations near depletion. Simple expressions are derived from an analytical solution to describe solid-state diffusion limited current for short duration, high-rate pulses.
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U2 - 10.1016/j.jpowsour.2006.03.050
DO - 10.1016/j.jpowsour.2006.03.050
M3 - Article
AN - SCOPUS:33748967921
SN - 0378-7753
VL - 161
SP - 628
EP - 639
JO - Journal of Power Sources
JF - Journal of Power Sources
IS - 1
ER -
