TY - GEN
T1 - AC impedance technique for dynamic and static state of charge analysis for Li-ion battery
AU - Luo, Yi Feng
AU - Gong, Cihun Siyong Alex
AU - Chang, Long Xi
AU - Liu, Yi Hua
PY - 2013
Y1 - 2013
N2 - An AC impedance-based technique for active online measurements of Li-ion battery systems is developed in this paper. An AC impedance technique is proposed to estimate state of charge (SOC) for Li-ion battery. The technique includes a set of static and dynamic measurements that are required for state of charge estimation. In this paper, potentiostatic measurements of Li-ion batteries and AC signal amplitude of 10mV are used. The impedance spectra are measured by sweeping frequencies between 1Hz and 10 kHz with 6 points/decade. The measurement results are presented in a Nyquist plot, a plot of real impedance against imaginary impedance. The test results show that Nyquist plot of dynamic and static measurement of a battery cell are different, due to the internal electrochemical response. This is caused by the AC impedance that is different at the same range frequencies. In discharge process, when SOC of cell is dropped, its AC impedance is also changed. Therefore, through active online detection, the proposed AC impedance technique can be utilized to measure the SOC of Li-ion battery.
AB - An AC impedance-based technique for active online measurements of Li-ion battery systems is developed in this paper. An AC impedance technique is proposed to estimate state of charge (SOC) for Li-ion battery. The technique includes a set of static and dynamic measurements that are required for state of charge estimation. In this paper, potentiostatic measurements of Li-ion batteries and AC signal amplitude of 10mV are used. The impedance spectra are measured by sweeping frequencies between 1Hz and 10 kHz with 6 points/decade. The measurement results are presented in a Nyquist plot, a plot of real impedance against imaginary impedance. The test results show that Nyquist plot of dynamic and static measurement of a battery cell are different, due to the internal electrochemical response. This is caused by the AC impedance that is different at the same range frequencies. In discharge process, when SOC of cell is dropped, its AC impedance is also changed. Therefore, through active online detection, the proposed AC impedance technique can be utilized to measure the SOC of Li-ion battery.
UR - https://www.scopus.com/pages/publications/84883539287
U2 - 10.1109/ISCE.2013.6570268
DO - 10.1109/ISCE.2013.6570268
M3 - 会议稿件
AN - SCOPUS:84883539287
SN - 9781467361996
T3 - Proceedings of the International Symposium on Consumer Electronics, ISCE
SP - 9
EP - 10
BT - 2013 IEEE 17th International Symposium on Consumer Electronics, ISCE 2013
T2 - 2013 IEEE 17th International Symposium on Consumer Electronics, ISCE 2013
Y2 - 3 June 2013 through 6 June 2013
ER -
