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<p>The safety research of thermal runaway propagation (TRP) has become the current focus with the wide application of lithium-ion batteries (LIBs). It is crucial to design and utilize different combinations of thermal insulation materials to prevent TRP. In this study, an independent experimental platform for investigating TRP behavior in 26,650 LIB modules were established, considering various electrical connections and aerogel insulation placement. The collected and analyzed data include TRP behavior, temperature, mass loss, and heat release rate, aiming to explore the influence of aerogel felt positioning on TRP characteristics. The findings reveal that parallel modules not only exhibit an earlier onset of TRP than other battery systems but also pose a higher risk under various electrical connections. The positioning of the aerogel felt significantly influences the speed of TRP. Placing an aerogel felt between batteries postpones the onset of TRP in the battery module regardless of the electrical connection. Furthermore, situating an aerogel felt between batteries notably diminishes overall heat release during TRP for both series and non-electrically connected batteries. Combining the placement of aerogel felts at the top and middle positions can mitigate harm from TRP in a parallel battery system. This study proposes targeted preventive strategies for diverse electrically connected battery systems and identifies specific aerogel configurations capable of effectively suppressing TRP in the battery module.</p>

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Experimental Study on the Suppression of Thermal Runaway Propagation in Battery Modules with Different Electrical Connections and Aerogel Felt Location

  • 期刊论文

  • 发表日期：

    2025年7月2日

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  • Ruinan Sheng,
  • Yin Chen,
  • Luyao Zhao,
  • Wang Zhan,
  • Mingyi Chen

摘要

The safety research of thermal runaway propagation (TRP) has become the current focus with the wide application of lithium-ion batteries (LIBs). It is crucial to design and utilize different combinations of thermal insulation materials to prevent TRP. In this study, an independent experimental platform for investigating TRP behavior in 26,650 LIB modules were established, considering various electrical connections and aerogel insulation placement. The collected and analyzed data include TRP behavior, temperature, mass loss, and heat release rate, aiming to explore the influence of aerogel felt positioning on TRP characteristics. The findings reveal that parallel modules not only exhibit an earlier onset of TRP than other battery systems but also pose a higher risk under various electrical connections. The positioning of the aerogel felt significantly influences the speed of TRP. Placing an aerogel felt between batteries postpones the onset of TRP in the battery module regardless of the electrical connection. Furthermore, situating an aerogel felt between batteries notably diminishes overall heat release during TRP for both series and non-electrically connected batteries. Combining the placement of aerogel felts at the top and middle positions can mitigate harm from TRP in a parallel battery system. This study proposes targeted preventive strategies for diverse electrically connected battery systems and identifies specific aerogel configurations capable of effectively suppressing TRP in the battery module.