TY - GEN
T1 - Model-based electrochemical estimation of lithium-ion batteries
AU - Smith, Kandler A.
AU - Rahn, Christopher D.
AU - Wang, Chao Yang
PY - 2008
Y1 - 2008
N2 - A linear Kalman filter based on a reduced order electrochemical model is designed to estimate internal battery potentials, concentration gradients, and state of charge (SOC) from external current and voltage measurements. The estimates are compared with results from an experimentally validated one-dimensional nonlinear finite volume model of a 6 Ah hybrid electric vehicle battery. The linear filter gives, to within ∼2%, performance in the 30%-70% SOC range, except in the case of severe current pulses that draw electrode surface concentrations to near saturation and depletion; however, the estimates recover as concentration gradients relax. With 4 to 7 states, the filter has low order comparable to empirical equivalent circuit models but provides estimates of the battery's internal electrochemical state.
AB - A linear Kalman filter based on a reduced order electrochemical model is designed to estimate internal battery potentials, concentration gradients, and state of charge (SOC) from external current and voltage measurements. The estimates are compared with results from an experimentally validated one-dimensional nonlinear finite volume model of a 6 Ah hybrid electric vehicle battery. The linear filter gives, to within ∼2%, performance in the 30%-70% SOC range, except in the case of severe current pulses that draw electrode surface concentrations to near saturation and depletion; however, the estimates recover as concentration gradients relax. With 4 to 7 states, the filter has low order comparable to empirical equivalent circuit models but provides estimates of the battery's internal electrochemical state.
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U2 - 10.1109/CCA.2008.4629589
DO - 10.1109/CCA.2008.4629589
M3 - Conference contribution
AN - SCOPUS:53349090465
SN - 9781424422234
T3 - Proceedings of the IEEE International Conference on Control Applications
SP - 714
EP - 719
BT - 17th IEEE International Conference on Control Applications, CCA
T2 - 17th IEEE International Conference on Control Applications, CCA
Y2 - 3 September 2008 through 5 September 2008
ER -
