用于动力电池模块热安全系统的磷酸三苯酯高阻燃复合相变材料

IF 15 1区 工程技术 Q1 ENERGY & FUELS Etransportation Pub Date : 2024-03-06 DOI:10.1016/j.etran.2024.100325
Wensheng Yang , Canbing Li , Xinxi Li , Hewu Wang , Jian Deng , Tieqiang Fu , Yunjun Luo , Yan Wang , Kunlong Xue , Guoqing Zhang , Dequan Zhou , Yaoxiang Du , Xuxiong Li
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引用次数: 0

摘要

近年来,随着电动汽车(EV)的发展,电池组的热安全问题备受关注。虽然各种电池热管理系统(BTMS)已被大量研究,但电池组在极端滥用条件下的热失控传播(TRP)问题还只是停留在结构设计和理论模型层面。如何探索一种创新技术来提高包括 BTMS 和 TRP 在内的综合热安全性,仍然是一个巨大的挑战。本研究成功制备了一种多功能阻燃石蜡(PA)/苯乙烯-丁二烯-苯乙烯(SBS)/膨胀石墨(EG)/甲基苯基硅树脂(MPS)/磷酸三苯酯(TPP)复合相变材料(PSEMT)。此外,它还应用于 26650 三元动力电池模块。实验结果表明,当 MPS 和 TPP 的比例为 1:2 时,PSEMT 具有较高的热稳定性,同时由于磷和硅的协同阻燃效应,PSEMT 还具有优异的阻燃性能。此外,采用 PSEMT 的圆柱形 26650 电池模块具有最佳的热管理性能。即使在十次循环后以 2C 放电率放电,电池模块的最高工作温度仍能保持在 50°C 以下,最大温差控制在 4.6°C 以内。此外,通过多个热源的触发,它还能很好地抑制热失控。此外,带有 PSEMT 的电池还能抑制峰值温度,延迟热失控的发生时间。因此,可以推断出采用 PSEMT 的电池模块可以有效避免热累积,并显著降低其热安全风险。这项研究从储能和电动汽车的角度,为平衡电池的温度不一致性和抑制电池组的热失控提供了一种新的解决方案,具有广阔的前景。
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High flame retardant composite phase change materials with triphenyl phosphate for thermal safety system of power battery module

The thermal safety of battery pack has attracted much attention accompany with the growth in electric vehicles (EVs) in recent years. Although various battery thermal management systems (BTMS) are investigated by many research, the thermal runaway propagation (TRP) of battery packs under extremely abused conditions is just at the level of structural design and theoretical model. How to explore an innovative technology to improve the integrated thermal safety including the BTMS and TRP is still a great challenge. In this study, a multifunctional flame-retardant paraffin (PA)/styrene-butadiene-styrene (SBS)/expanded graphite (EG)/methylphenyl silicone resin (MPS)/triphenyl phosphate (TPP) composite phase change material (PSEMT) has successfully prepared. Besides, it has applied in 26650 ternary power battery modules. When the proportion of MPS and TPP is 1:2, the experimental results reveal that PSEMT possesses high thermal stability, and excellent flame-retardant properties owing to synergistic flame-retardant effect with phosphorus and silicon. Further, the cylindrical 26650 battery module with PSEMT exhibits optimum thermal management performance. Even at 2C discharge rate after ten cycles, the maximum operating temperature of battery module can still be maintained below 50 °C, and the maximum temperature difference is controlled within 4.6 °C. Additionally, it displays an excellent thermal runaway suppression through triggering by multiple heat sources. What's more, the battery with PSEMT can suppress the peak temperature and delay the occurrence time of thermal runaway. Therefore, it can be induced that the battery module with PSEMT can effectively avoid heat accumulation and significantly reduce its thermal safety risk. This study offers a new solution with promising prospects from the perspectives of energy storage and EVs, for balancing the temperature inconsistencies in batteries and suppressing thermal runaway in the battery packs.

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来源期刊
Etransportation
Etransportation Engineering-Automotive Engineering
CiteScore
19.80
自引率
12.60%
发文量
57
审稿时长
39 days
期刊介绍: eTransportation is a scholarly journal that aims to advance knowledge in the field of electric transportation. It focuses on all modes of transportation that utilize electricity as their primary source of energy, including electric vehicles, trains, ships, and aircraft. The journal covers all stages of research, development, and testing of new technologies, systems, and devices related to electrical transportation. The journal welcomes the use of simulation and analysis tools at the system, transport, or device level. Its primary emphasis is on the study of the electrical and electronic aspects of transportation systems. However, it also considers research on mechanical parts or subsystems of vehicles if there is a clear interaction with electrical or electronic equipment. Please note that this journal excludes other aspects such as sociological, political, regulatory, or environmental factors from its scope.
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