Eingebettetes Impedanzmesssystem für das Batteriemanagement in Elektrofahrzeugen

Günther, Thomas; Büschel, Paul; Kanoun, Olfa

doi:10.1515/teme-2014-1052

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…Typically, these signals are obtained via the binarization of a multisine signal, via Walsh functions [6,25], which are limited to 2 N frequencies, or more efficiently via the sign (signum) function [23,26]. However, other 1-bit modulation techniques could be interesting, such as sigma-delta (Σ∆) modulation [27]. Theoretically, the signum-based method provides a higher amplitude spectrum than the multisine's due to the binarization factor 4/π (see ( 4)).…”

Section: Multifrequency Nrz Binary Signalmentioning

confidence: 99%

Critical implementation issues of excitation signals for embedded wearable bioimpedance spectroscopy systems with limited resources

Kallel

Bouchaala

Kanoun

2021

Meas. Sci. Technol.

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Wideband excitation signals are essential in bioimpedance spectroscopy for measurements in a time ensuring a quasi-stable measurement condition. In particular, for wearable biomedical systems, due to limited system resources, several aspects regarding measurement time, crest factor, slew rate requirements, frequency distribution, amplitude spectrum, and energy efficiency need to be thoroughly investigated. In this paper, we present an investigation of excitation signals, which includes not only the theoretical aspects but also aspects of real implementation on microcontroller-based systems. At a fixed number of samples and sampling rate, we investigate the implementability of signal frequencies and the resulting spectral efficiency. We focus on sources of signal distortion due to timer and amplitude deviations. The results show that for 4096 samples and a sampling frequency of 1 MHz, wideband signals are 2.76 times faster than a stepped frequency sweep. The multisine signal provides a better energy efficiency and has a lower slew rate requirement on hardware (around 0.3 V µs−1), but has a relatively high crest factor, even after optimization. An exemplary investigation of the distortion of the time/frequency and amplitudes following implementation on a standard industrial advanced RISC machines microcontroller has shown that a sampling rate compensation is required to overcome timer inaccuracies. Furthermore, non-return-to-zero binary signals are more sensitive to distortion due to hardware-related issues and have a lower signal-to-distortion-and-noise (SINAD) ratio than 24 dB, which is lower than the multisine signal, having a SINAD of 31 dB.

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Section: Multifrequency Nrz Binary Signalmentioning

confidence: 99%

Critical implementation issues of excitation signals for embedded wearable bioimpedance spectroscopy systems with limited resources

Kallel

Bouchaala

Kanoun

2021

Meas. Sci. Technol.

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“…Yet, the latest developments allow to realize embedded solutions for impedance spectroscopy, which realize a comparable measurement quality like sophisticated laboratory devices [21,30] having low cost and a significantly short measurement time. This development allows to use impedance for real-time measurements on site and to determine useful information for intelligent battery management systems, such as SoH [22], SoC [20], the internal cell temperature [31] and the remaining useful battery life [32].…”

Section: Battery Characterization and Diagnosticsmentioning

confidence: 99%

Impedance Spectroscopy

오한준¹,

이종호²,

이영훈³

et al. 2018

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An electronic version of this book is freely available, thanks to the support of libraries working with Knowledge Unlatched. KU is a collaborative initiative designed to make high quality books Open Access. More information about the initiative can be found at www.knowledgeunlatched.org Contents Preface | V List of Contributing Authors | XIII Olfa Kanoun Impedance spectroscopy advances and future trends: A comprehensive review | 1 1 Introduction | 1 2 Theoretical background | 2 3 Extraction of information from impedance spectra | 3 4 Impedance spectroscopy in measurements and sensor solutions | 4 5 Material characterization | 5 6 Battery characterization and diagnostics | 7 7 Biomedical applications and food characterization | 9 8 Cable fault detection and localization | 11 9 Conductive, capacitive and inductive sensors | 12 10 Biosensors | 15 11 Future trends of impedance spectroscopy | 16 11.1 Embedded and miniaturized solutions | 16 11.2 Fast impedance spectroscopy and tomography | 17 11.3 Impedimetric sensors | 17 Bibliography | 17

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A Study of Binary Excitation Sequences for use in Battery Impedance Spectroscopy

Kallel

Fischer

Kanoun

2023

2023 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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Eingebettetes Impedanzmesssystem für das Batteriemanagement in Elektrofahrzeugen

Cited by 7 publications

References 4 publications

Critical implementation issues of excitation signals for embedded wearable bioimpedance spectroscopy systems with limited resources

Critical implementation issues of excitation signals for embedded wearable bioimpedance spectroscopy systems with limited resources

Impedance Spectroscopy

A Study of Binary Excitation Sequences for use in Battery Impedance Spectroscopy

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