In this paper, the use of binary sequences for electrochemical impedance spectroscopy (EIS) of battery cells is experimentally investigated by implementing them on a VLSI 1-bit current digital-to-analog converter. Two types of binary sequences are considered, i.e. sigma-delta modulated multisine sequences and maximum-length binary sequences. Their performance is evaluated using a low-complexity experimental setup. Results prove that the two types of sequences are capable of estimating the complex impedance of a battery in the frequency range of interest 1 Hz-200 Hz with an RMSE smaller than 5% with respect to a reference instrument. Both sequences are suitable for implementing online in-situ EIS monitoring, because they enable fast measurement and simple integration within the battery cell itself.
In-situ Electrochemical Impedance Spectroscopy of Battery Cells by means of Binary Sequences / De Angelis A.; Ramilli R.; Crescentini M.; Moschitta A.; Carbone P.; Traverso P.A.. - ELETTRONICO. - 2021-:(2021), pp. 9459998.1-9459998.5. (Intervento presentato al convegno 2021 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2021 tenutosi a Technology and Innovation Centre (TIC), gbr nel 2021) [10.1109/I2MTC50364.2021.9459998].
In-situ Electrochemical Impedance Spectroscopy of Battery Cells by means of Binary Sequences
Ramilli R.;Crescentini M.
;Traverso P. A.
2021
Abstract
In this paper, the use of binary sequences for electrochemical impedance spectroscopy (EIS) of battery cells is experimentally investigated by implementing them on a VLSI 1-bit current digital-to-analog converter. Two types of binary sequences are considered, i.e. sigma-delta modulated multisine sequences and maximum-length binary sequences. Their performance is evaluated using a low-complexity experimental setup. Results prove that the two types of sequences are capable of estimating the complex impedance of a battery in the frequency range of interest 1 Hz-200 Hz with an RMSE smaller than 5% with respect to a reference instrument. Both sequences are suitable for implementing online in-situ EIS monitoring, because they enable fast measurement and simple integration within the battery cell itself.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
