Synchronisation using wireless trigger-broadcast for impedance spectroscopy of battery cells

Roscher, Valentin; Schneider, M.; Durdaut, Phillip; Sassano, Nico; Pereguda, Sergej; Mense, Eike; Riemschneider, Karl-Ragmar

doi:10.1109/sas.2015.7133608

Cited by 17 publications

(13 citation statements)

References 6 publications

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“…The thermo-physical parameters chosen for the model validation are shown in Table 1. The dimensions were chosen to match those of the large format lithium-ion cell employed in [29], and the remaining thermal parameters were chosen based on typical properties of lithium iron phosphate cells ( [22,38,25]).…”

Section: Resultsmentioning

confidence: 99%

On-board monitoring of 2-D spatially-resolved temperatures in cylindrical lithium-ion batteries: Part I. Low-order thermal modelling

Richardson

Zhao

Howey

2016

Journal of Power Sources

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Estimating the temperature distribution within Li-ion batteries during operation is critical for safety and control purposes. Although existing control-oriented thermal models -such as thermal equivalent circuits (TEC) -are computationally efficient, they only predict average temperatures, and are unable to predict the spatially resolved temperature distribution throughout the cell. We present a low-order 2D thermal model of a cylindrical battery based on a Chebyshev spectral-Galerkin (SG) method, capable of predicting the full temperature distribution with a similar efficiency to a TEC. The model accounts for transient heat generation, anisotropic heat conduction, and non-homogeneous convection boundary conditions. The accuracy of the model is validated through comparison with finite element simulations, which show that the 2-D temperature field (r, z) of a large format (64 mm diameter) cell can be accurately modelled with as few as 4 states. Furthermore, the performance of the model for a range of Biot numbers is investigated via frequency analysis. For larger cells or highly transient thermal dynamics, the model order can be increased for improved accuracy. The incorporation of this model in a state estimation scheme with experimental validation against thermocouple measurements is presented in the companion contribution (Part II).• Derivation and validation of low-order 2-D thermal model for cylindrical cells.• Efficient numerical implementation based on Chebshev spectral-Galerkin method.• Includes anisotropic heat conduction and inhomogeneous convection boundary conditions.• Applicable to various battery cooling configurations, such as side or end cooling.• Suitable for use in a state-estimator with surface temperature or EIS measurements.2 www.github.com/robert-richardson/Spectral-Thermal-Model-2D

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Section: Resultsmentioning

confidence: 99%

On-board monitoring of 2-D spatially-resolved temperatures in cylindrical lithium-ion batteries: Part I. Low-order thermal modelling

Richardson

Zhao

Howey

2016

Journal of Power Sources

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“…Obviously, the measurement uncertainty is also dependent on the used measurement equipment. Since common electrochemical measurement equipment is not suitable for on-board applications, several authors presented proof-of-concept PCB that can perform these on-board electrochemical measurements [277,281,287,[294][295][296][297][298]. By integrating the PCB functionalities into a small chip [299], batteries inside a battery pack can be monitored for voltage, impedance and temperature by a single device, enabling accurate SoC, SoH, and temperature measurements at individual battery level.…”

Section: Impedance-based Temperature Measurementsmentioning

confidence: 99%

A review on various temperature-indication methods for Li-ion batteries

et al. 2019

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Temperature measurements of Li-ion batteries are important for assisting Battery Management Systems in controlling highly relevant states, such as State-of-Charge and State-of-Health. In addition, temperature measurements are essential to prevent dangerous situations and to maximize the performance and cycle life of batteries. However, due to thermal gradients, which might quickly develop during operation, fast and accurate temperature measurements can be rather challenging. For a proper selection of the temperature measurement method, aspects such as measurement range, accuracy, resolution, and costs of the method are important. After providing a brief overview of the working principle of Li-ion batteries, including the heat generation principles and possible consequences, this review gives a comprehensive overview of various temperature measurement methods that can be used for temperature indication of Li-ion batteries. At present, traditional temperature measurement methods, such as thermistors and thermocouples, are extensively used. Several recently introduced methods, such as impedance-based temperature indication and fiber Bragg-grating techniques, are under investigation in order to determine if those are suitable for largescale introduction in sophisticated battery-powered applications.

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“…Several approaches exists for the in-battery communication as alternatives to the state of the art systems, which don't consider PLC [25], [26]. Takanashi et al [27] modeled a PLC channel of a high-voltage power line for HEVs.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the power-line channel in automotive Li-ion batteries with Rogowski coils as coupling elements

Opalko

Alonso

Dostert

2016

2016 International Symposium on Power Line Communications and Its Applications (ISPLC)

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A model of the transmission channel is essential for designing a power-line communication (PLC) system for a lithium-ion battery pack in electric and hybrid vehicles. Currently, measurements of lithium-ion batteries have to be performed by specially trained staff in safety chambers, because they might cause severe safety problems. A simulation model of the battery would therefore highly facilitate the analysis of different battery packs. Our approach is to extend an existing circuitbased model of the power-line channel with a 3-D electromagnetic (EM) model. The 3-D EM model is well capable of describing the inner environment of the battery pack as well as PLC coupling elements, which is necessary because power lines can also act as antennas. On the other hand, a fully detailed 3-D EM model cannot be simulated within a reasonable period of time. This article gives essential insights into future PLC systems for battery packs in order to ensure safe usage of electric and hybrid cars for the user and the environment.

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Synchronisation using wireless trigger-broadcast for impedance spectroscopy of battery cells

Cited by 17 publications

References 6 publications

On-board monitoring of 2-D spatially-resolved temperatures in cylindrical lithium-ion batteries: Part I. Low-order thermal modelling

On-board monitoring of 2-D spatially-resolved temperatures in cylindrical lithium-ion batteries: Part I. Low-order thermal modelling

A review on various temperature-indication methods for Li-ion batteries

Modeling of the power-line channel in automotive Li-ion batteries with Rogowski coils as coupling elements

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