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Swelling Force in Lithium-Ion Power Batteries
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-06-25 , DOI: 10.1021/acs.iecr.0c01035 Yongkun Li 1, 2 , Chuang Wei 2 , Yumao Sheng 2 , Feipeng Jiao 1 , Kai Wu 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-06-25 , DOI: 10.1021/acs.iecr.0c01035 Yongkun Li 1, 2 , Chuang Wei 2 , Yumao Sheng 2 , Feipeng Jiao 1 , Kai Wu 2
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To meet the demand for high energy and long life of electric vehicles, lithium-ion batteries using Ni–Co–Mn ternary materials as cathode have become the focus of industrialization. To design a safe, reliable, and durable battery system is a necessary condition to ensure the healthy development of the new energy electric vehicle industry. The swelling force caused by the lithium-ion insertion/extraction not only does harm to the safety of the battery system but also deteriorates the battery life. Moreover, the swelling force increases with the increase in the cycle. In this work, the difference in the swelling force of batteries design with different number of electrode sheets was studied. When the gap between the electrode and the aluminum shell is the same, the number of electrode sheets in the battery is higher, the swelling force is greater, and the capacity fading is faster; the swelling force is also stronger in the module. Because of the stronger swelling force in the module with more electrode sheets, the strength of each structural component needs to be designed stronger to ensure the module is safe and durable throughout the designed life. The results of this research could be instructive in designing a battery system.
中文翻译：
锂离子动力电池的膨胀力
为了满足电动汽车高能量和长寿命的需求，以Ni-Co-Mn三元材料为正极的锂离子电池已经成为工业化的重点。设计安全，可靠，耐用的电池系统是确保新能源电动汽车产业健康发展的必要条件。由锂离子插入/拔出引起的膨胀力不仅损害电池系统的安全性，而且使电池寿命劣化。此外，膨胀力随着循环的增加而增加。在这项工作中，研究了具有不同数量电极片的电池设计膨胀力的差异。当电极与铝壳之间的间隙相同时，电池中的电极片数更多，溶胀力更大，容量衰减更快；模块中的膨胀力也更大。由于带有更多电极片的模块具有更强的溶胀力，因此需要将每个结构组件的强度设计得更强，以确保模块在整个设计寿命中都是安全耐用的。这项研究的结果可能对设计电池系统具有启发性。
更新日期：2020-07-08
中文翻译：
锂离子动力电池的膨胀力
为了满足电动汽车高能量和长寿命的需求，以Ni-Co-Mn三元材料为正极的锂离子电池已经成为工业化的重点。设计安全，可靠，耐用的电池系统是确保新能源电动汽车产业健康发展的必要条件。由锂离子插入/拔出引起的膨胀力不仅损害电池系统的安全性，而且使电池寿命劣化。此外，膨胀力随着循环的增加而增加。在这项工作中，研究了具有不同数量电极片的电池设计膨胀力的差异。当电极与铝壳之间的间隙相同时，电池中的电极片数更多，溶胀力更大，容量衰减更快；模块中的膨胀力也更大。由于带有更多电极片的模块具有更强的溶胀力，因此需要将每个结构组件的强度设计得更强，以确保模块在整个设计寿命中都是安全耐用的。这项研究的结果可能对设计电池系统具有启发性。
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