Analysis of Acoustic Characteristics under Battery External Short Circuit Based on Acoustic Emission

Abstract

The safety of power batteries has received more and more attention in promoting electric vehicles. The external short circuit is particularly prominent as an abnormal and harmful event of a battery, and the exploration of in-situ low-cost detection technology for such an event is the starting point of this paper. By building an experimental bench that could detect the external short circuit of the battery and obtain the acoustic, electrode, and temperature responses, the resulting acoustic analysis would establish an internal connection with the electrode and temperature measurement when the external short circuit occurs. The respective acoustic response characteristics of different initial battery states of charge were analyzed by selecting appropriate acoustic characteristic parameters in the time and frequency domains. The acoustic measurement could represent the battery abnormality synchronously like the electrode measurement, and the results of the damage and rearrangement of the internal of the battery are easy to characterize through a moderate amplification of the acoustic response. The different initial state of charge (SOC) state reflects noticeable differences in the acoustic characteristics. Therefore, it is considered that the acoustic emission technology might have potential battery condition assessment capabilities and be a tool for in-situ battery fault diagnosis.

Detection and Analysis of Abnormal High-Current Discharge of Cylindrical Lithium-Ion Battery Based on Acoustic Characteristics Research

“…Specifically, in short-circuit detection, acoustic measurements can characterize cell anomalies across various SOCs, complementing conventional electrode assessments [28,29]. Additionally, for aging-related failures, these methods offer a swift and reliable means to detect defect accumulation, outperforming standard inspection techniques [16,30].…”

“…AE techniques are finding increasingly practical applications across various battery types, including cylindrical, prismatic, and pouch configurations. For cylindrical batteries, AE has been used to analyze the acoustic characteristics under conditions such as external short circuits, providing insights into potential battery safety and health issues [30]. In studies on prismatic batteries, AE monitoring has proven effective in exploring mechanical properties and failure mechanisms, which are crucial for predicting battery life and preventing catastrophic failures [7].…”

Deciphering Advanced Sensors for Life and Safety Monitoring of Lithium Batteries

“…[ 260 ] In the field of abuse monitoring, acoustic emission technology presents the potential in external circuit detection and shows a faster response than temperature measurement. [ 261 ] In the failure of three point type bending process, damaging behaviors throughout the failure process show corresponding acoustic emission signals. [ 262 ]…”