Passive cooling of lithium-ion batteries based on flexible phase change materials: Molecular structure, interactions and mechanistic aspects

Yang, Bo; Ji, Jun; Zhang, Xuelai; Hua, Weisan

doi:10.1016/j.molliq.2023.123340

Cited by 6 publications

(1 citation statement)

References 110 publications

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“…The role of the battery thermal management system (BTMS) is to regulate the temperature of the battery within suitable ranges during all operating conditions, including cooling and heating insulation, to maintain its optimal performance and state of charge. Depending on the cooling medium, the thermal management of the battery system can be classified into several forms, including air-cooling systems [21][22][23][24], liquid-cooling systems [25][26][27][28], phase-change material systems [29][30][31][32][33], heat-pipe cooling systems [34][35][36][37][38], and hybrid cooling systems [39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Numerical Study of Lithium-Ion Batteries with Air-Cooling Systems towards Thermal Safety

Li,

Wang,

Cen

et al. 2024

Fire

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Given the growing demand for increased energy capacity and power density in battery systems, ensuring thermal safety in lithium-ion batteries has become a significant challenge for the coming decade. Effective thermal management plays a crucial role in battery design optimization. Air-cooling temperatures in vehicles often vary from ambient due to internal ventilation, with external air potentially overheating due to vehicle malfunctions. This article highlights the efficiency of lateral side air cooling in battery packs, suggesting a need for further exploration beyond traditional front side methods. In this study, we examine the impact of three different temperature levels and two distinct air-cooling directions on the performance of an air-cooling system. Our results reveal that the air-cooling direction has a more pronounced influence compared with the air-cooling temperature. By employing an optimal air-cooling direction and ambient air-cooling temperature, it is possible to achieve a temperature reduction of approximately 5 K in the battery, which otherwise requires a 10 K decrease in the air-cooling temperature to achieve a similar effect. Therefore, we propose an empirical formula for air-cooling efficiency under various conditions, aiming to provide valuable insights into the factors affecting air-cooling systems for industrial applications toward enhancing the fire safety of battery energy storage systems.

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