Electrochemical-mechanical coupled modeling and parameterization of swelling and ionic transport in lithium-ion batteries

Sauerteig, Daniel; Hanselmann, Nina; Arzberger, Arno; Reinshagen, Holger; Ivanov, Svetlozar; Bund, Andreas

doi:10.1016/j.jpowsour.2017.12.044

Cited by 116 publications

(88 citation statements)

References 66 publications

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“…Given that the PE separator studied here is not the same as that studied in Ref. 29 and and PP (bottom) datasets (i.e., gray polymer space and pale-yellow electrolytefilled pore space) of 3 μm edge length under uniaxial compressive strains of 0, 5, 10, 20 and 40% in the through-plane (TP) direction. The compressive stress in MPa applied to achieve the given percent strain is indicated for each structure.…”

Section: Simulating Mechanical Compression On 3d Representations Of Smentioning

confidence: 99%

Designing Polyolefin Separators to Minimize the Impact of Local Compressive Stresses on Lithium Ion Battery Performance

Lagadec

Zahn

Wood

2018

J. Electrochem. Soc.

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In this paper, we study how polyolefin separators respond to compressive stress, which can occur during battery operation as active particles lithiate, expand, and push into and deform the separator. We use real microstructures of polyethylene and polypropylene separators acquired with focused ion beam scanning electron microscopic (FIB-SEM) tomography and simulate how these structures deform under compressive strain. After validating our mechanical simulations, we characterize how the microstructural properties of the separators change as a function of compressive strain and simulate the influence these changes in microstructure have on the lithium ion transport through the separator. We find that a given compressive strain negatively impacts the microstructure of polyethylene separator more than that of a polypropylene separator. To understand the origins of the different response to compressive strains in polyethylene and polypropylene separators, we use a network-based analysis to assess the type of mechanical deformations occurring in the separator membrane and show that it is the combination of material properties and structure that are responsible for the greater stability of polypropylene. This work highlights how the structure of a separator plays an important role in its mechanical robustness and prevention of cell degradation.

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Section: Simulating Mechanical Compression On 3d Representations Of Smentioning

confidence: 99%

Designing Polyolefin Separators to Minimize the Impact of Local Compressive Stresses on Lithium Ion Battery Performance

Lagadec

Zahn

Wood

2018

J. Electrochem. Soc.

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“…These values are in high contrast with the Young's moduli of the pure active materials (e.g. NMC -199 GPa) (6) and are attributed to the binder content in the electrode (4).…”

Section: Introductionmentioning

confidence: 74%

“…Nowadays, an additional factor for cell aging and performance gains more and more attentionmechanical stresses (1,2). (4,5). These values are in high contrast with the Young's moduli of the pure active materials (e.g.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Lithium Plating Due to Spatial Inhomogeneous Separator Strain in Lithium-Ion-Cells

Ebert

Oberbauer

Cabañero

et al. 2019

IJAE

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The electrodes and especially the separator of a lithium-ion-cell are exposed to mechanical stress due to expansion of electrode materials during operation if the electrodes are integrated in a stiff cell casing e.g. in a 18650 cell. As a result, the porosity and therefore the lithiumdiffusion characteristics are altered. In this paper a simulative study of spatially resolved effects from inhomogeneous separator porosity reduction induced by mechanical strain is presented. The findings show significantly changed spatial current densities and local anode voltage potentials that match findings of post-mortem investigations.

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“…And the mesoscale was introduced into the aggregate model to relate microscopic and macroscopic mechanical effects. Sauerteig et al, likewise, applied a coupled 2D electrochemical‐mechanical model of LIB to study the volume change caused by intercalation and aging of electrodes. The calculation approach took into consider the electrode expansion, stress generation, the compression of electrodes and separator, and finally the lithium‐ion transport.…”

Section: Battery Modelsmentioning

confidence: 99%

A review on battery management system from the modeling efforts to its multiapplication and integration

2019

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Summary Progress in battery technology accelerates the transition of battery management system (BMS) from a mere monitoring unit to a multifunction integrated one. It is necessary to establish a battery model for the implementation of BMS's effective control. With more comprehensive and faster battery model, it would be accurate and effective to reflect the behavior of the battery level to the vehicle. On this basis, to ensure battery safety, power, and durability, some key technologies based on the model are advanced, such as battery state estimation, energy equalization, thermal management, and fault diagnosis. Besides, the communication of interactions between BMS and vehicle controllers, motor controllers, etc is an essential consideration for optimizing driving and improving vehicle performance. As concluded, a synergistic and collaborative BMS is the foundation for green‐energy vehicles to be intelligent, electric, networked, and shared. Thus, this paper reviews the research and development (R&D) of multiphysics model simulation and multifunction integrated BMS technology. In addition, summary of the relevant research and state‐of‐the‐art technology is dedicated to improving the synergy and coordination of BMS and to promote the innovation and optimization of new energy vehicle technology.

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Electrochemical-mechanical coupled modeling and parameterization of swelling and ionic transport in lithium-ion batteries

Cited by 116 publications

References 66 publications

Designing Polyolefin Separators to Minimize the Impact of Local Compressive Stresses on Lithium Ion Battery Performance

Designing Polyolefin Separators to Minimize the Impact of Local Compressive Stresses on Lithium Ion Battery Performance

Simulation of Lithium Plating Due to Spatial Inhomogeneous Separator Strain in Lithium-Ion-Cells

A review on battery management system from the modeling efforts to its multiapplication and integration

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