Digital Impedance Emulator for Battery Measurement System Calibration

Meaningful information on the internal state of a battery can be derived by measuring its impedance. Accordingly, battery management systems based on electrochemical impedance spectroscopy are now recognized as a feasible solutions for online battery control and diagnostic. Since the impedance of a...

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Autores principales:	Francesco Santoni, Alessio De Angelis, Antonio Moschitta, Paolo Carbone
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	battery management impedance spectroscopy impedance emulator digital filter fir filter instrument calibration Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/d7c7cfba5def4c02b6efb0f83b16669c
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spelling	oai:doaj.org-article:d7c7cfba5def4c02b6efb0f83b16669c2021-11-11T19:18:45ZDigital Impedance Emulator for Battery Measurement System Calibration10.3390/s212173771424-8220https://doaj.org/article/d7c7cfba5def4c02b6efb0f83b16669c2021-11-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7377https://doaj.org/toc/1424-8220Meaningful information on the internal state of a battery can be derived by measuring its impedance. Accordingly, battery management systems based on electrochemical impedance spectroscopy are now recognized as a feasible solutions for online battery control and diagnostic. Since the impedance of a battery is always changing along with its state of charge and aging effects, it is important to have a stable impedance reference in order to calibrate and test a battery management system. In this work we propose a programmable impedance emulator that in principle could be used for the calibration of any battery management system based on electrochemical impedance spectroscopy. A digital finite-impulse-response filter is implemented, whose frequency response is programmed so as to reproduce exactly the impedance of a real battery in the frequency domain. The whole design process of the filter is presented in detail. An analytical expression for the impedance of real battery in the frequency domain is derived from an equivalent circuit model. The model is validated both through numerical simulations and experimental tests. In particular, the filter is implemented on a low-cost microcontroller unit, and the emulated impedance is measured by means of a custom-made electrochemical impedance spectroscopy measuring system, and verified by using standard commercial bench instruments. Results on this prototype show the feasibility of using the proposed emulator as a fully controllable and low-cost reference for calibrating battery impedance measurement systems.Francesco SantoniAlessio De AngelisAntonio MoschittaPaolo CarboneMDPI AGarticlebattery managementimpedance spectroscopyimpedance emulatordigital filterfir filterinstrument calibrationChemical technologyTP1-1185ENSensors, Vol 21, Iss 7377, p 7377 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	battery management impedance spectroscopy impedance emulator digital filter fir filter instrument calibration Chemical technology TP1-1185
spellingShingle	battery management impedance spectroscopy impedance emulator digital filter fir filter instrument calibration Chemical technology TP1-1185 Francesco Santoni Alessio De Angelis Antonio Moschitta Paolo Carbone Digital Impedance Emulator for Battery Measurement System Calibration
description	Meaningful information on the internal state of a battery can be derived by measuring its impedance. Accordingly, battery management systems based on electrochemical impedance spectroscopy are now recognized as a feasible solutions for online battery control and diagnostic. Since the impedance of a battery is always changing along with its state of charge and aging effects, it is important to have a stable impedance reference in order to calibrate and test a battery management system. In this work we propose a programmable impedance emulator that in principle could be used for the calibration of any battery management system based on electrochemical impedance spectroscopy. A digital finite-impulse-response filter is implemented, whose frequency response is programmed so as to reproduce exactly the impedance of a real battery in the frequency domain. The whole design process of the filter is presented in detail. An analytical expression for the impedance of real battery in the frequency domain is derived from an equivalent circuit model. The model is validated both through numerical simulations and experimental tests. In particular, the filter is implemented on a low-cost microcontroller unit, and the emulated impedance is measured by means of a custom-made electrochemical impedance spectroscopy measuring system, and verified by using standard commercial bench instruments. Results on this prototype show the feasibility of using the proposed emulator as a fully controllable and low-cost reference for calibrating battery impedance measurement systems.
format	article
author	Francesco Santoni Alessio De Angelis Antonio Moschitta Paolo Carbone
author_facet	Francesco Santoni Alessio De Angelis Antonio Moschitta Paolo Carbone
author_sort	Francesco Santoni
title	Digital Impedance Emulator for Battery Measurement System Calibration
title_short	Digital Impedance Emulator for Battery Measurement System Calibration
title_full	Digital Impedance Emulator for Battery Measurement System Calibration
title_fullStr	Digital Impedance Emulator for Battery Measurement System Calibration
title_full_unstemmed	Digital Impedance Emulator for Battery Measurement System Calibration
title_sort	digital impedance emulator for battery measurement system calibration
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d7c7cfba5def4c02b6efb0f83b16669c
work_keys_str_mv	AT francescosantoni digitalimpedanceemulatorforbatterymeasurementsystemcalibration AT alessiodeangelis digitalimpedanceemulatorforbatterymeasurementsystemcalibration AT antoniomoschitta digitalimpedanceemulatorforbatterymeasurementsystemcalibration AT paolocarbone digitalimpedanceemulatorforbatterymeasurementsystemcalibration
_version_	1718431613334847488

Digital Impedance Emulator for Battery Measurement System Calibration

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