Thermal Impedance Spectroscopy - A method for the thermal characterization of high power battery cells

Fleckenstein, Matthias; Fischer, Sebastian; Bohlen, Oliver; Bäker, Bernard

doi:10.1016/j.jpowsour.2012.07.144

Cited by 89 publications

(60 citation statements)

References 16 publications

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“…For example, the authors of [3] found a difference of 12% for the thermal conductivity and a difference of 5% for the heat capacity for the same cell model using two testing methods.…”

Section: Discussionmentioning

confidence: 99%

“…Another method is to use the power loss inside the cell to generate the heat as described in [2,3]. The heat flow is stimulated by a sinusoidal current or a square wave current.…”

Section: ‫ܩ‬ሺ݅߱ሻ = ܶ ௦௨ ሺ݅߱ሻ ܳሺ݅߱ሻ ሺ2ሻmentioning

confidence: 99%

“…Previous authors already proved that the method is working with pouch [2] and cylindrical cells [3] to find the thermal impedance spectrum or to use the impedance spectrum to fit thermal characteristics to a model. With this in mind, we tried to build upon the previous work of these groups to develop a 3 dimensional model that could be used to find the heat capacity and the heat conductivity for multiple directions.…”

Section: Introductionmentioning

confidence: 99%

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Application of the Thermal Impedance Spectroscopy method in three dimensions to a large prismatic Li-ion cell

Lapointe¹

2013

WEVJ

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Thermal impedance spectroscopy (TIS) is applied for the thermal characterization of a large prismatic battery cell. The method is based on previously published work and is extended to a three dimensional system. By using a discretized three dimensional model, the experimental results can be fitted to obtain the specific heat capacity and heat conductivity of the cell in three dimensions. The results show good agreement with the available data in the literature. Suggestions are made to improve the test setup to gain more confidence in the results and to increase the precision of the model. Thermal impedance spectroscopy, Li-ion battery thermal modelling

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“…For example, the authors of [3] found a difference of 12% for the thermal conductivity and a difference of 5% for the heat capacity for the same cell model using two testing methods.…”

Section: Discussionmentioning

confidence: 99%

“…Another method is to use the power loss inside the cell to generate the heat as described in [2,3]. The heat flow is stimulated by a sinusoidal current or a square wave current.…”

Section: ‫ܩ‬ሺ݅߱ሻ = ܶ ௦௨ ሺ݅߱ሻ ܳሺ݅߱ሻ ሺ2ሻmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of the Thermal Impedance Spectroscopy method in three dimensions to a large prismatic Li-ion cell

Lapointe¹

2013

WEVJ

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“…In recent years, some non-destructive methods of internal temperature measurement have been investigated [13][14][15]. Fleckenstein et al [13] introduced a Thermal Impedance Spectroscopy (TIS) method for thermal characterization of battery cells to determine the temperature via the heat conductivity and the specific heat capacity.…”

Section: Introductionmentioning

confidence: 99%

“…Fleckenstein et al [13] introduced a Thermal Impedance Spectroscopy (TIS) method for thermal characterization of battery cells to determine the temperature via the heat conductivity and the specific heat capacity. Srinivasan et al [14] proposed an Electrochemical Impedance Spectrum (EIS) method to explore the correlation between the internal cell temperature and the phase angle of electrochemical impedance at a certain frequency.…”

Section: Introductionmentioning

confidence: 99%

Multi-Electrode Resistivity Probe for Investigation of Local Temperature Inside Metal Shell Battery Cells via Resistivity: Experiments and Evaluation of Electrical Resistance Tomography

Hong

Feng

et al. 2015

Energies

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Direct Current (DC) electrical resistivity is a material property that is sensitive to temperature changes. In this paper, the relationship between resistivity and local temperature inside steel shell battery cells (two commercial 10 Ah and 4.5 Ah lithium-ion cells) is innovatively studied by Electrical Resistance Tomography (ERT). The Schlumberger configuration in ERT is applied to divide the cell body into several blocks distributed in different levels, where the apparent resistivities are measured by multi-electrode surface probes. The investigated temperature ranges from −20 to 80 °C . Experimental results have shown that the resistivities mainly depend on temperature changes in each block of the two cells used and the function of the resistivity and temperature can be fitted to the ERT-measurement results in the logistical-plot. Subsequently, the dependence of resistivity on the state of charge (SOC) is investigated, and the SOC range of 70%-100% has a remarkable impact on the resistivity at low temperatures. The proposed approach under a thermal cool down regime is demonstrated to monitor the local transient temperature.

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Anisotropic Thermal Characterisation of Large‐Format Lithium‐Ion Pouch Cells**

Lin

Chu

Monroe

et al. 2022

Batteries & Supercaps

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Temperature strongly impacts battery performance, safety and durability, but modelling heat transfer requires accurately measured thermal properties. Herein we propose new approaches to characterise the heat capacity and anisotropic thermal‐conductivity components for lithium‐ion pouch cells. Heat capacity was estimated by applying Newton's law of cooling to an insulated container within which the cell was submerged in warmed dielectric fluid. Thermal conductivity was quantified by heating one side of the cell and measuring the opposing temperature distribution with infra‐red thermography, then inverse modelling with the anisotropic heat equation. Experiments were performed on commercial 20 Ah lithium iron phosphate (LFP) pouch cells. At 100 % state‐of‐charge (SOC), the heat capacity of a 489 g, 224 mL pouch cell was 541 J K−1. The through‐plane and in‐plane thermal conductivities were respectively 0.52 and 26.6 W m−1 K−2. Capturing anisotropies in conductivity is important for accurate thermal simulations. State‐of‐charge dependence was also probed by testing at 50 % SOC: the heat capacity dropped by 6 % and thermal conductivity did not significantly change.

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Thermal Impedance Spectroscopy - A method for the thermal characterization of high power battery cells

Cited by 89 publications

References 16 publications

Application of the Thermal Impedance Spectroscopy method in three dimensions to a large prismatic Li-ion cell

Application of the Thermal Impedance Spectroscopy method in three dimensions to a large prismatic Li-ion cell

Multi-Electrode Resistivity Probe for Investigation of Local Temperature Inside Metal Shell Battery Cells via Resistivity: Experiments and Evaluation of Electrical Resistance Tomography

Anisotropic Thermal Characterisation of Large‐Format Lithium‐Ion Pouch Cells**

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