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Heat Transfer for Large Scale Lithium-ion Batteries Module by Triggering Thermal Runaway

机译:通过触发热失控的大规模锂离子电池模块的传热

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Lithium-ion batteries (LIBs) are widely used in our daily lives. The applications, such as in electric vehicles, hybrid electric vehicles, and new conceptions of power stations, require high power for operation. Therefore, high energy density for large scale LIBs to achieve convenient operational conditions is definitely an urgent need. However, with the improvement of energy, the accompanying safety problems cannot be ignored. In this study, six LIBs were set as 2×3 matrix, different compartments were placed between each LIB for insulation. Single cell of matrix was heated by heating rate of 5 C/min to trigger an internal short circuit. Thirty thermocouples and wires were set on each LIB for tracking on temperature and voltage. The 2D heat flux field was constructed based on the temperature data combined with infrared thermal imaging camera. The heat accumulation for large scale LIBs will cause damage to the adjacent LIBs besides triggering the LIB without the compartment. Herein, we can learn about the impact of heat transfer on LIBs safety and the importance of thermal risk management.
机译:锂离子电池(LIBS)广泛用于我们日常生活。诸如电动车辆,混合动力电动车辆和发电站的新概念中的应用需要高功率进行操作。因此,对于大型尺度库来实现方便的操作条件的高能量密度绝对是迫切需要的。然而,随着能源的提高,伴随的安全问题不能忽视。在本研究中,将六只LIB被设定为2×3矩阵,在每个LIB之间放置不同的隔间以进行绝缘。通过5c / min的加热速率加热基质的单个细胞以触发内部短路。在每个LIB上设置了30个热电偶和电线,用于跟踪温度和电压。基于与红外线热成像相机组合的温度数据构造了2D热通量场。除了在没有隔间的情况下触发LIB,大规模libs的热累积将对相邻的Lib造成损坏。在此,我们可以了解热传递对LIBS安全的影响和热风险管理的重要性。

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