Multiphysics computational framework for cylindrical lithium-ion batteries under mechanical abusive loading

Liu, Binghe; Zhao, Hui; Yu, Huili; Li, Jie; Xu, Jun

doi:10.1016/j.electacta.2017.10.045

Cited by 116 publications

(57 citation statements)

References 49 publications

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“…However, due to the poor thermal stability of materials in LIBs, serious hazards may be induced when LIBs are under unexpected abuse conditions such as extrusion, penetration, overheat, and overcharge . Thermal runaway caused by the above abuse conditions can be attributed to a series of side reaction heat generation inside the battery.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] However, due to the poor thermal stability of materials in LIBs, serious hazards may be induced when LIBs are under unexpected abuse conditions such as extrusion, penetration, overheat, and overcharge. [6][7][8][9][10] Thermal runaway caused by the above abuse conditions can be attributed to a series of side reaction heat generation inside the battery. The internal heat of the battery continues to accumulate when the heat generation rate is much higher than the heat dissipation rate, eventually causing uncontrollable chemical reactions of battery.…”

Section: Introductionmentioning

confidence: 99%

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Thermal safety study of Li‐ion batteries under limited overcharge abuse based on coupled electrochemical‐thermal model

et al. 2020

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Summary Many fire accidents of electric vehicles were reported that happened during the charging process. In order to investigate the reasons that lead to this problem, this paper studies the thermal safety of Li‐ion batteries under limited overcharge abuse. A 3D electrochemical‐thermal coupled model is developed for modeling thermal and electrochemical characteristics from normal charge to early overcharge state. This model is validated by experiment at charge rates of 0.5C, 1C, and 2C. The simulation results indicate that irreversible heat contributes most to temperature rise during the normal charge process, but the heat induced by Mn dissolution and Li deposition gradually dominates heat generation in the early overcharge period. Based on this, a threshold selection method for multistage warning of batteries overcharge is proposed. Among them, level 1 should be considered as a critical stage during the early overcharge process due to the deposited lithium starts to react with electrolyte at the end of level 1, where temperature rate increases to 0.5°C min−1 for 1C charge. While the thresholds of levels depend on charge rate and composition of battery. Furthermore, several critical parameters are analyzed to figure out their effects on thermal safety. It is found that the temperature at the end of overcharge is significantly influenced by the change of positive electrode thickness and solid electrolyte interface (SEI) film resistance. The final temperature increases by 17.5°C and 7.9°C, respectively, with positive electrode thickness ranging from 50 to 80 μm and SEI film resistance increasing from 0.002 to 0.03 Ω.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal safety study of Li‐ion batteries under limited overcharge abuse based on coupled electrochemical‐thermal model

et al. 2020

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“…Lithium-ion batteries (LIBs) have been widely used in electrochemical energy conversion and storage for a wide range of applications, including electronic devices, electric vehicles and their energy systems, and so forth, due to their high energy density, long cycle life, zero memory effect, low self-discharge, and environmental friendliness [1][2][3][4][5][6][7]. LIBs mainly consist of positive electrodes, negative electrodes, electrolytes, and macromolecular separators.…”

Section: Introductionmentioning

confidence: 99%

Self-Polymerized Dopamine Nanoparticles Modified Separators for Improving Electrochemical Performance and Enhancing Mechanical Strength of Lithium-Ion Batteries

et al. 2020

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Separators in lithium-ion batteries (LIBs) play an important role for battery safety, so stable electrochemical performance and high mechanical strength of separators will always be of interest. On the basis of the fact that polydopamine (PDA) nanoparticles found in mussel have a strong adhesion ability, biomaterial surface nanoparticles modification methods are developed to increase electrochemical performance and enhance mechanical strength of polypropylene (PP) and polypropylene/polyethylene/polypropylene (PP/PE/PP) separators. The electrolyte uptake performance, ionic conductivities, discharging rate capabilities, yield stresses, and failure strains of PP and PP/PE/PP separators are all enhanced remarkably by PDA modification. Thermal shrinkage results show that thermal stabilities and the shrinkage percentage of PDA-modified separators are improved. The electrochemical testing results conclude that the discharging capacities of PP (increased by 3.77%~187.57%) and PP/PE/PP (increased by 2.31%~92.21%) separators increase remarkably from 0.1 C to 5.0 C. The ionic conductivities of PDA-modified PP and PP/PE/PP separators are 1.5 times and 6.1 times higher than that of unmodified PP and PP/PE/PP separators, which in turn increase the electrolyte uptake and ionic migration. In addition, mechanical properties of PP (yield stresses: 17.48%~100.11%; failure stresses: 13.45%~82.71%; failure strains: 4.08%~303.13%) and PP/PE/PP (yield stresses: 11.77%~296.00%; failure stresses: 12.50%~248.30%; failure strains: 16.53%~32.56%) separators are increased greatly.

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“…[15][16][17][18][19][20][21][22][23] According to electrochemical and thermal coupled model, the thermal runaway and temperature distribution of LIPB under exterior loading were obtained by experiment. [11][12][13] In addition, the mechanical property and ISC under quasi-state loading and dynamic impacting were investigated experimentally, 10,[22][23][24][25][26][27][28] and the results concluded that mechanical property and ISC played an important role in the failure analysis of LIPB. Because the potential of carbon is very close to that of lithium, the lithium dendrites are formed on the surface of the negative electrode when battery is charged.…”

Section: Introductionmentioning

confidence: 99%

Resistance exterior force property of lithium‐ion pouch batteries with different positive materials

Hao

Xie

et al. 2019

Int J Energy Res

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Summary Lithium‐ion pouch battery (LIPB) is widely applied in different engineering fields, such as electric vehicles, aeronautics, astronautics, and among others. However, few complete mechanical models with deformation field are presented to predict internal short circuit (ISC) and resistance exterior force property of LIPB under exterior loading. In the present research, the indentation theoretical models with sinusoidal shape function are established to investigate resistance exterior force property of batteries with different positive materials under different punch shapes loading. The effects of indentation displacement and deformation region on indentation force are carried out. By the comparison of indentation force, present theoretical and numerical results are consistent with previous experimental results. The indentation force increases with the punch radius increase, but decreases with the indentation displacement increase. On the basis of energy conservation law, it is concluded that LIPB is more likely to produce mechanical failure and ISC when normalized deformation region is greater than or equal to 0.4 and plastic strain energy ratio is greater than or equal to 1.5. In addition, from resistance exterior force property point of view, LIPB has a better property to resist external force when LiMnNiCoO2, rather than LiCoO2 and Nanophosphate, is used as positive material. The research provides a reference for assessing the safety of LIPB and selecting suitable positive material, which possesses high energy capacity and resistance exterior force property.

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Multiphysics computational framework for cylindrical lithium-ion batteries under mechanical abusive loading

Cited by 116 publications

References 49 publications

Thermal safety study of Li‐ion batteries under limited overcharge abuse based on coupled electrochemical‐thermal model

Thermal safety study of Li‐ion batteries under limited overcharge abuse based on coupled electrochemical‐thermal model

Self-Polymerized Dopamine Nanoparticles Modified Separators for Improving Electrochemical Performance and Enhancing Mechanical Strength of Lithium-Ion Batteries

Resistance exterior force property of lithium‐ion pouch batteries with different positive materials

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