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

Abstract

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.

Direct Observation of Interfacial Mechanical Failure in Thiophosphate Solid Electrolytes with Operando X‐Ray Tomography

“…In these cases, the sharp jump in current is enough to decompose the dendrimer and return the cell to approximately normal function. [ 38,39 ] Cells were cycled until failure (an example of which is provided in Figure S3, Supporting Information) wherein an irreparable cell short occurred, typified by a permanent jump in cell current. Generally, the interlayer modified cells exhibit enhanced lifetimes relative to the all‐solid‐state cells, suggesting moderate suppression of lithium dendrite propagation.…”

Toward a Safer Battery Management System: A Critical Review on Diagnosis and Prognosis of Battery Short Circuit

“…In addition to the location, the changing rate of voltage, current, and temperature of ISC and ESC are also quite different. ISC normally has an incubation period (Yang et al, 2019), which is a process of gradual deterioration (Lee et al, 2018), although the final performance is consistent with the ESC.…”

A universal anisotropic model for a lithium‐ion cylindrical cell validated under axial, lateral, and bending loads

“…Many studies have focused on characterizing the response of battery components such as individual layers of electrodes, separators, current collectors, or the active particle coating of the jellyroll 34–43 ; another topic was the modeling of the separator, where various failure criteria have been calibrated and validated 25,41,44,45 ; endcaps as protection of the battery against thermal runaway and explosion were also tested for the strength, as well as the maximum pressure to be tolerated 15,46 . The state of charge (SOC) was also mentioned to affect the performance of the battery under deformation 16,37,47–49 . Temperature and aging are two additional important factors that may affect battery behavior 50,51 .…”

“…15,46 The state of charge (SOC) was also mentioned to affect the performance of the battery under deformation. 16,37,[47][48][49] Temperature and aging are two additional important factors that may affect battery behavior. 50,51 Recently, with the rapid growth of artificial intelligence, probabilistic simulationbased frameworks and databases were established to predict the battery behavior during impact more effectively.…”