Cell geometry influences on the vibration performance of lithium-ion batteries

Abstract

This study uses the International Electrotechnical Commission standard (IEC62660–2) to investigate the performance of pouch, cylindrical, and prismatic lithium-ion batteries under high vibration conditions (10–2000 Hz). It aims to fill the gap in recent studies that primarily investigate cylindrical batteries with lower frequency vibration standards. Six samples of each battery type were subjected to a series of experiments, including cycling tests and electrochemical impedance spectroscopy (EIS). The electrochemical performance of the batteries was monitored before and after the vibration to evaluate the vibration effect. The findings revealed that cylindrical batteries degraded the most, with considerable capacity loss and increased internal resistance, whereas pouch batteries were the least affected. The performance of prismatic batteries degraded less than cylindrical batteries and more than pouch batteries. The average discharge voltage (DV avg ) analysis also supported EIS results. These findings also emphasize the need to take vibrational impacts into account when selecting and designing batteries for electric vehicles (EVs), particularly structural battery applications. • Analysis of pouch, cylindrical, and prismatic batteries under high-frequency vibrations (10–2000 Hz) • Focus on high frequency using the IEC 62660-2 standard, exploring vibrations above 1000 Hz • Cylindrical batteries showed the most degradation, while pouch batteries were the least affected. • Key implications presented for EVs and structural battery designs under vibrational stress

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