Mechanical vibration's effect on thermal management module of Li-ion battery module based on phase change material (PCM) in a high-temperature environment

Abstract

PCM-based systems play a crucial role in managing the thermal conditions of electric vehicle (EV) battery modules, a critical aspect in ensuring their optimal performance. However, an often overlooked facet in current research is the impact of mechanical vibration on EV battery modules during real-world driving scenarios. Addressing this gap, the current article takes a pioneering approach, drawing inspiration from the groundbreaking study by Du and Chen in 2023. This study delves into the effects of mechanical vibration on a PCM-based Battery Thermal Management System (BTMS) specifically adapted for battery modules operating in high-temperature environments. The results, shedding light on a previously underestimated factor, unveil the remarkable ability of mechanical vibration to ameliorate the surge in temperature within the battery module, particularly under high discharge rates. An unprecedented revelation surfaces as mechanical vibration emerges as a factor influencing the thickness of the encapsulated PCM, offering a unique avenue for augmenting the energy density of the powertrain. In this challenging thermal environment, mechanical vibration fosters temperature uniformity among batteries and curtails heat accumulation within the battery module. Remarkably, when the vibration amplitude surpasses a critical threshold, the impact of amplitude variations becomes negligible. Moreover, the intricate relationship between vibration frequency and temperature change complicates the scenario, with medium to high frequencies demonstrating a propensity to enhance the management system's overall thermal performance. These groundbreaking findings transcend the theoretical realm, offering tangible insights with immense implications for practical design and application. By recognizing and harnessing the potential benefits of mechanical vibration, engineers and designers can optimize BTMS, paving the way for more efficient and resilient EV battery modules.

Keywords

• Lithium-ion battery
• Mechanical vibration
• Phase change material
• Battery thermal management system