In situ key aging parameter determination of a vehicle battery using only CAN signals in commercial vehicles

Geng, Zeyang; Thiringer, Torbjörn

doi:10.1016/j.apenergy.2022.118932

Cited by 8 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2a-2c the current (steps of 1 and −1 mA), capacity (in mA.h) and voltage (in V) time series at different days of measurements, i.e. at the beginning (up to the end of day 2) and close to the end of the battery lifetime (around days [16][17][18], and at a certain point in time in between (around days [12][13][14]. The time step of excitation and measurement was set to 5 s. We can see qualitatively from the figures that the frequency of charging/ discharging current waveform applied on the battery, with the resulting capacity and voltage signals increase slightly with time.…”

Section: Resultsmentioning

confidence: 99%

“…16 This leads us to the motivation behind this work in which we apply joint time-frequency analytical tools to time-domain electrical signals of lithium-sulfur (Li-S) batteries (taken as an example) especially when one is interested in evaluating the performance of the device under cyclic operation. Cyclability is especially relevant for applications in which the energy storage device is required to undergo hundreds or thousands of sequences of deep discharges followed by recharge to maximum capacity, [17][18][19] such as in consumer devices and load leveling systems. Such tests are usually performed by subjecting the device to extended cycling of square wave (power, current or voltage) signals with control on the lower and upper voltage limits, and then observing the capacity retention vs cycle number and variation of internal resistance.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Short-Time Fourier Transform Analysis of Current Charge/Discharge Response of Lithium-Sulfur Batteries

Allagui,

Awadallah,

El-Zahab

et al. 2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

Measurements acquired on batteries in the form of time signals such as voltage-time and capacity-time to assess their cyclability performance can be supplemented by examining their frequency-domain response. This allows one to determine the global characteristics of the signals and the battery, but not the local behavior, which is very important for determining for example battery fading. In this study we examine the short-time Fourier transform for time-frequency deconstruction of galvanostatic charge/discharge signals of lithium-sulfur batteries, taken as an example. The results displayed in terms of spectrograms show how the frequency content of such signals (e.g. charge and voltage time series) evolve with the lifetime of the batteries allowing the detection of critical changes in the response that may lead to fading and eventually default.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Short-Time Fourier Transform Analysis of Current Charge/Discharge Response of Lithium-Sulfur Batteries

Allagui,

Awadallah,

El-Zahab

et al. 2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…The additionally available data can be utilized to detect inhomogeneities in serial connections 21 . Furthermore, aging can be analyzed 22 to understand the degradation state. Implementing the evaluation of the impedance on an embedded system is a challenge 23 .…”

Section: Methodsmentioning

confidence: 99%

Balancing resistor-based online electrochemical impedance spectroscopy in battery systems: opportunities and limitations

Blömeke,

Zappen,

Ringbeck

et al. 2024

Commun Eng

View full text Add to dashboard Cite

Active dissipative balancing systems are essential in battery systems, particularly for compensating the leakage current differences in battery cells. This study focuses on using balancing resistors to stimulate battery cells for impedance measurement. The value of impedance spectroscopy for in-depth battery cell diagnostics, such as temperature or aging, is currently being demonstrated and recognized by vehicle manufacturers, chip producers, and academia. Our research systematically explores the feasibility of using existing balancing resistors in battery management systems and identifies potential limitations. Here we propose a formula to minimize hardware requirements through signal processing techniques. A quadrupling of the sampling rate, number of averaging values, or the size of the fast Fourier transform is equivalent, concerning the signal-to-noise ratio, to increasing the analog resolution by one bit or reducing the input filter bandwidth by a quarter.

show abstract

“…The additionally available data can be utilized to detect inhomogeneities in serial connections (Rüther et al, 2023). Furthermore, aging can be analyzed (Geng and Thiringer, 2022) to understand the degradation state. Implementing the evaluation of the impedance on an embedded system is a challenge.…”

Section: Online Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Balancing Resistor-based Online Electrochemical Impedance Spectroscopy: Opportunities and Limitations

Blömeke,

Zappen,

Ringbeck

et al. 2023

Preprint

View full text Add to dashboard Cite

Active dissipative balancing systems are widely used in battery systems. A lower boundary for the necessary balancing current is the difference in the leakage current of batteries in the system. The use of balancing resistors for the excitation of lithium-ion battery cells to determine their impedance has been discussed for almost decades. The value of impedance spectroscopy for in-depth battery cell diagnostics, such as temperature or aging, is currently being demonstrated and recognized by vehicle manufacturers, chip producers, and academia. This work systematically and quantitatively investigates how and under which circumstances the excitation can be performed via the balancing resistors already used in the battery management system and where limitations may lie. If individual cells or modules are to be replaceable, the balancing current must be so high that it can also be used for online electrochemical impedance spectroscopy.

show abstract

In situ key aging parameter determination of a vehicle battery using only CAN signals in commercial vehicles

Cited by 8 publications

References 18 publications

Short-Time Fourier Transform Analysis of Current Charge/Discharge Response of Lithium-Sulfur Batteries

Short-Time Fourier Transform Analysis of Current Charge/Discharge Response of Lithium-Sulfur Batteries

Balancing resistor-based online electrochemical impedance spectroscopy in battery systems: opportunities and limitations

Balancing Resistor-based Online Electrochemical Impedance Spectroscopy: Opportunities and Limitations

Contact Info

Product

Resources

About