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A numerical study on the thermal performance of prismatic li-ion batteries for hibrid electric aircraft

机译：混合动力飞机棱形锂离子电池热性能的数值研究

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摘要

The increase of greenhouse gas emissions and environmental pollution leading to global warming have made it necessary for measures to be taken to increase the production and usage of electric vehicles. Instead of fossil fuels, these vehicles, which are powered by electricity from sustainable sources, promise hope for global warming through zero emissions. Batteries for electric aircraft are in important position. In these vehicles, the primary energy source or primary auxiliary energy source is high-density batteries. Temperature is one of the most important factors impressive battery performance as it shortens battery life. Lithium ion batteries are the preferred battery in this study because they have a high specific energy and energy density. This study examined the performance of the heat generated by 10 prismatic batteries. These batteries were connected to each other in series. The cathode of the batteries is LiMn_2O_4. A three-dimensional thermal analysis was performed under natural and forced transport conditions. The temperature of the batteries rises in the middle of the battery module and an uneven temperature distribution was observed under natural convection. Because of the heat transfer from each battery's surface, both a decrease in temperature was observed and a balanced temperature distribution happened under forced convections. As the C ratio decreased, the temperature of the batteries decreased, but this process requires a longer time. For this reason, C values should be selected according to the battery capacity and working environment.
机译：导致全球变暖的温室气体排放和环境污染的增加使得必须采取措施来增加电动汽车的生产和使用。这些由可持续来源的电力驱动的车辆代替化石燃料，有望通过零排放实现全球变暖的希望。电动飞机电池处于重要地位。在这些车辆中，主要能源或主要辅助能源是高密度电池。温度是令人印象深刻的电池性能的最重要因素之一，因为它会缩短电池寿命。锂离子电池是本研究中的首选电池，因为它们具有较高的比能量和能量密度。这项研究检查了10个方形电池产生的热量的性能。这些电池串联连接。电池的阴极为LiMn_2O_4。在自然和强制运输条件下进行了三维热分析。电池温度在电池模块的中间升高，在自然对流下观察到温度分布不均。由于从每个电池表面传热，因此观察到温度降低，并且在强制对流条件下发生了平衡的温度分布。随着C比的降低，电池的温度降低，但是该过程需要更长的时间。因此，应根据电池容量和工作环境选择C值。

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