Qingdan Huang, Yang Bai, Han Luo, Yikai Jia, Chao Zhang
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引用次数: 0
摘要
在具有挑战性的运行环境中,锂离子电池(LIB)不可避免地会承受机械应力,包括冲击和挤压,这可能会导致电池损坏、失效,甚至发生火灾和爆炸事故。因此,研究机械负载下锂离子电池的安全性能势在必行。本研究立足于由电化学循环和低速冲击组成的更真实的耦合场景。我们通过实验系统地揭示了各种条件下的机械、电化学和热反应、损伤行为以及相应的机制。我们的研究表明,较高的冲击能量会导致结构刚度、最高温度和最大电压降的增加。此外,冲击能量的增加会对内阻中的电阻参数产生重大影响。我们还研究了充电状态(SOC)和 C 速率的影响。这些方法和实验结果将为加强安全设计、进行风险评估以及实现基于 LIB 的储能系统的级联利用提供启示。
Dynamic Multi-Physics Behaviors and Performance Loss of Cylindrical Batteries Upon Low-Velocity Impact Loading
In challenging operational environments, Lithium-ion batteries (LIBs) inevitably experience mechanical stresses, including impacts and extrusion, which can lead to battery damage, failure, and even the occurrence of fire and explosion incidents. Consequently, it is imperative to investigate the safety performance of LIBs under mechanical loads. This study is grounded in a more realistic coupling scenario consisting of electrochemical cycling and low-velocity impact. We systematically and experimentally uncovered the mechanical, electrochemical, and thermal responses, damage behavior, and corresponding mechanisms under various conditions. Our study demonstrates that higher impact energy results in increased structural stiffness, maximum temperature, and maximum voltage drop. Furthermore, heightened impact energy significantly influences the electrical resistance parameters within the internal resistance. We also examined the effects of State of Charge (SOC) and C-rates. The methodology and experimental findings will offer insights for enhancing the safety design, conducting risk assessments, and enabling the cascading utilization of energy storage systems based on LIBs.
期刊介绍:
Energy & Environmental Materials (EEM) is an international journal published by Zhengzhou University in collaboration with John Wiley & Sons, Inc. The journal aims to publish high quality research related to materials for energy harvesting, conversion, storage, and transport, as well as for creating a cleaner environment. EEM welcomes research work of significant general interest that has a high impact on society-relevant technological advances. The scope of the journal is intentionally broad, recognizing the complexity of issues and challenges related to energy and environmental materials. Therefore, interdisciplinary work across basic science and engineering disciplines is particularly encouraged. The areas covered by the journal include, but are not limited to, materials and composites for photovoltaics and photoelectrochemistry, bioprocessing, batteries, fuel cells, supercapacitors, clean air, and devices with multifunctionality. The readership of the journal includes chemical, physical, biological, materials, and environmental scientists and engineers from academia, industry, and policy-making.