In-situ Electrochemical Impedance Spectroscopy of Battery Cells by means of Binary Sequences
- Resource Type
- Conference
- Authors
- de Angelis, Alessio; Ramilli, Roberta; Crescentini, Marco; Moschitta, Antonio; Carbone, Paolo; Traverso, Pier Andrea
- Source
- 2021 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Instrumentation and Measurement Technology Conference (I2MTC), 2021 IEEE International. :1-5 May, 2021
- Subject
- Bioengineering
Engineering Profession
General Topics for Engineers
Signal Processing and Analysis
Sigma-delta modulation
Impedance measurement
Frequency modulation
Very large scale integration
Battery charge measurement
Time measurement
Frequency estimation
Electrochemical Impedance Spectroscopy
batteries
Binary sequences
Sigma-Delta
Maximum-Length Binary Sequences
- Language
- ISSN
- 2642-2077
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.