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Evaluation of the influence of lithium-ion battery composition on thermal power generation
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2024-02-22 , DOI: 10.1039/d4se00191e Luca Giammichele 1 , Daniele Colarossi 1 , Valerio D’Alessandro 1 , Matteo Falone 1
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2024-02-22 , DOI: 10.1039/d4se00191e Luca Giammichele 1 , Daniele Colarossi 1 , Valerio D’Alessandro 1 , Matteo Falone 1
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Lithium-ion batteries are currently the most widely technology used for electric mobility. During their service life, batteries can be subjected to high discharge currents, which increase the temperature of the cells. Therefore, it is essential to properly design the battery thermal management system to keep the batteries in the optimal temperature range and to avoid inefficiencies, reduction of life cycles and thermal runaway. These systems require the knowledge of the battery heat generation to be as accurate as possible. The purpose of this work is to suggest a methodology to evaluate the heat generation of batteries during discharge and to compare the thermal behavior of three commercial batteries that are usually adopted in electric vehicles. In particular, LFP, NCA, and NMC batteries were experimentally tested at ambient temperature and under different operating currents, measuring cell voltage and surface temperature. The heat generation was evaluated using a simplified equation and the results were deeply analyzed and discussed. The results show that the NCA cell has the highest heat generation and surface temperature. Also, the ratio between the heat generated and the electrical energy supplied is higher for the NCA cell, while the NMC cell exhibits the lowest value. The NMC cell shows the highest energy efficiency among the batteries under investigation. The mean efficiencies obtained were 0.8, 0.76, and 0.82, respectively, for the LFP, NCA, and NMC cells.
中文翻译：
锂离子电池成分对热发电的影响评价
锂离子电池是目前电动汽车中使用最广泛的技术。在其使用寿命期间，电池可能会受到高放电电流的影响，从而导致电池温度升高。因此，必须正确设计电池热管理系统，以将电池保持在最佳温度范围内，并避免效率低下、寿命周期缩短和热失控。这些系统需要尽可能准确地了解电池发热情况。这项工作的目的是提出一种评估电池在放电过程中产生的热量的方法，并比较电动汽车中通常采用的三种商用电池的热行为。特别是，对LFP、NCA和NMC电池在环境温度和不同工作电流下进行了实验测试，测量电池电压和表面温度。使用简化方程评估了热量产生，并对结果进行了深入分析和讨论。结果表明，NCA电池的发热和表面温度最高。此外，NCA 电池产生的热量与供应的电能之间的比率较高，而 NMC 电池的值最低。NMC 电池在所研究的电池中表现出最高的能源效率。LFP、NCA 和 NMC 电池的平均效率分别为 0.8、0.76 和 0.82。
更新日期：2024-02-22
中文翻译：
锂离子电池成分对热发电的影响评价
锂离子电池是目前电动汽车中使用最广泛的技术。在其使用寿命期间，电池可能会受到高放电电流的影响，从而导致电池温度升高。因此，必须正确设计电池热管理系统，以将电池保持在最佳温度范围内，并避免效率低下、寿命周期缩短和热失控。这些系统需要尽可能准确地了解电池发热情况。这项工作的目的是提出一种评估电池在放电过程中产生的热量的方法，并比较电动汽车中通常采用的三种商用电池的热行为。特别是，对LFP、NCA和NMC电池在环境温度和不同工作电流下进行了实验测试，测量电池电压和表面温度。使用简化方程评估了热量产生，并对结果进行了深入分析和讨论。结果表明，NCA电池的发热和表面温度最高。此外，NCA 电池产生的热量与供应的电能之间的比率较高，而 NMC 电池的值最低。NMC 电池在所研究的电池中表现出最高的能源效率。LFP、NCA 和 NMC 电池的平均效率分别为 0.8、0.76 和 0.82。
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