Investigation of the deformation mechanisms of lithium-ion battery components using in-situ micro tests

Zhu, Juner; Zhang, Xiaowei; Luo, Hailing; Sahraei, Elham

doi:10.1016/j.apenergy.2018.05.007

Cited by 108 publications

(40 citation statements)

References 35 publications

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“…In stage I, the stiffness of the battery structure kept increasing as the intrusion continued until it reached the maximum value, and this stage was regarded as a densification process (see Figure 1b). In stage II, as the deformation continued, microscopic damage appeared inside the battery after the maximum stiffness was reached, such as microscopic cracks or microscopic holes visible in the scanning electron microscope (SEM) images of the micro-structure of the electrodes during deformation [34]. In stage III, as the deformation continued further, macroscopic fracture appeared inside the battery after the peak force was reached (see Figure 1a), such as macroscopic cracks or macroscopic holes, which finally initiated the macroscopic failure process.…”

Section: Evolution Of Isc Under Mechanical Abusive Conditionsmentioning

confidence: 99%

Investigation of Internal Short Circuits of Lithium-Ion Batteries under Mechanical Abusive Conditions

et al. 2019

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Current studies on the mechanical abuse of lithium-ion batteries usually focus on the mechanical damage process of batteries inside a jelly roll. In contrast, this paper investigates the internal short circuits inside batteries. Experimental results of voltage and temperature responses of lithium-ion batteries showed that battery internal short circuits evolve from a soft internal short circuit to a hard internal short circuit, as battery deformation continues. We utilized an improved coupled electrochemical-electric-thermal model to further analyze the battery thermal responses under different conditions of internal short circuit. Experimental and simulation results indicated that the state of charge of Li-ion batteries is a critical factor in determining the intensities of the soft short-circuit response and hard short-circuit response, especially when the resistance of the internal short circuit decreases to a substantially low level. Simulation results further revealed that the material properties of the short circuit object have a significant impact on the thermal responses and that an appropriate increase in the adhesion strength between the aluminum current collector and the positive electrode can improve battery safety under mechanical abusive conditions.

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Section: Evolution Of Isc Under Mechanical Abusive Conditionsmentioning

confidence: 99%

Investigation of Internal Short Circuits of Lithium-Ion Batteries under Mechanical Abusive Conditions

et al. 2019

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“…A recent review on the modeling of lithium-ion cells revealed 1 that previous studies have focused mostly on two common form factors, pouch 2-7 and cylindrical [7][8][9][10][11][12][13][14][15][16][17][18][19] cells and their components. [20][21][22][23][24][25][26] A third type of batteries commonly used in various applications such as electric vehicles is the prismatic cell. The main difference between prismatic and cylindrical cells is the arrangement of electrode-separator layers.…”

Section: Introductionmentioning

confidence: 99%

Elliptical lithium‐ion batteries: Transverse and axial loadings under wet/dry conditions

Kermani

Dixon

Sahraei

2019

Energy Science & Engineering

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Use of lithium‐ion batteries in mobile applications requires understanding of their response in the case of an impact and mechanical damage. Several studies have investigated the properties of pouch and cylindrical cells. However, the mechanical response of the third common form factor of batteries, namely prismatic cells, has not been fully studied. In this paper, extensive experiments were used to investigate the material properties of small commercial prismatic cells with round corners, in transverse and axial directions. Also, the effects of liquid electrolyte on deformation and failure patterns of cells were studied. Results showed that in quasi‐static tests, the wet and dry cells exhibited similar response in terms of load displacement curves. However, the wet cells showed lower failure points and different fracture patterns. Additionally, the type of separator used in the cells affected the peak load. An analytical approach was proposed to extract material properties from full cell crush testing. Then, finite element models were developed and calibrated using the extracted parameters. The models successfully predicted the load‐displacement response of the cells and the onset of short circuit. Additionally, it was shown that consideration of anisotropic material response has a significant effect on proper prediction of axial loading behavior.

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“…The main purpose of this article was to provide knowledge on dynamic modeling of batteries, above the wide range of studies that were focused on quasistatic properties of cells and components. [19][20][21][22][23][24][25][26][27][28][29]…”

Section: Discussionmentioning

confidence: 99%

Dynamic impact response of lithium-ion batteries, constitutive properties and failure model

Kermani

Sahraei

2019

RSC Adv.

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Investigation of the deformation mechanisms of lithium-ion battery components using in-situ micro tests

Cited by 108 publications

References 35 publications

Investigation of Internal Short Circuits of Lithium-Ion Batteries under Mechanical Abusive Conditions

Investigation of Internal Short Circuits of Lithium-Ion Batteries under Mechanical Abusive Conditions

Elliptical lithium‐ion batteries: Transverse and axial loadings under wet/dry conditions

Dynamic impact response of lithium-ion batteries, constitutive properties and failure model

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