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引用次数: 1
摘要
锂离子电池在机械载荷下的安全性是电动汽车行业面临的一个重大而紧迫的挑战。为了评估整个电池系统的安全容忍度,对遭受机械滥用的电池进行建模是至关重要的。电池的机械性能受到温度和老化的影响,导致活性层的性能发生实质性变化。忽略这些因素可能导致对电池机械响应的不完整估计。本研究考察了在不同温度和健康状态(SOH)下对电池进行的组件测试的结果。分析表明,颗粒和粘接力对温度效应和老化效应有独立的影响。通过结合Drucker-Prager Cap (DPC)模型中参数的力学解释,介绍了一种表征原位活性涂层在不同老化条件和温度下力学性能的方法。此外,给出了不同SOH水平下温度对电池的影响公式。有限元仿真与构件试验的对比进一步证实了工程关系的有效性。
Role of the temperature and aging in mechanical modeling of the active coating in Li-ion battery
Safety of lithium-ion batteries under mechanical loading poses a significant and urgent challenge in the Electric Vehicle (EV) industry. To assess the safety tolerance of the entire battery system, it is crucial to model the batteries subjected to mechanical abuse. The mechanical behavior of batteries is affected by temperature and aging, leading to substantial changes in the properties of active layers. Ignoring these factors may lead to an incomplete estimation of the batteries’ mechanical response.
This study examines the results of component tests conducted on batteries at various temperatures and states of health (SOH). The analysis reveals that the particle and adhesion aspects contribute independently to the temperature effect and the aging effect. By incorporating the mechanical interpretation of parameters in the Drucker-Prager Cap (DPC) model, a methodology for characterizing the mechanical properties of in-situ active coatings under different aging conditions and temperatures is introduced. Additionally, the formulation of temperature effects on batteries at different SOH levels is presented. The comparison between finite element (FE) simulations and component tests further confirms the validity of the engineering relationship.
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.