论文和技术资料

This paper introduces a multiphysics simulation framework for examining the impact of mechanical vibrations on lithium dendrite formation in lithium-ion batteries. We connected the lithium-ion battery, solid mechanics, and phase field physics interfaces using a custom model in COMSOL Multiphysics. The central aspect of our methodology is a stress-dependent diffusion mechanism, wherein mechanical stress induced by vibrations increases lithium-ion diffusivity within the anode, resulting in non-uniform plating and the nucleation and growth of dendrites. The simulation is conducted on a simplified one-dimensional geometry to examine this electro-chemo-mechanical coupling. A significant discovery is a non-monotonic frequency response: dendrite growth is most rapid within a mid-band frequency range of 150-250 Hz and most sluggish near 350 Hz. These results are compared to Faradaic deposition rates and give a detailed look at the conditions that can speed up battery degradation and failure. This work advances the literature by introducing a calibrated, unit-consistent Multiphysics workflow that isolates the causal role of sub-kilohertz vibration on lithium plating the principal novelties are: (a) a unit-safe electro chemo-mechanical coupling suitable for routine studies; and (b) a parameter-invariant frequency sweep that reveals a practical “hot band”. In addition, immediate applications include screening vibration windows for fast-charge operation and prioritizing damping or isolator strategies in test and pack environments. Finally, the approach is readily extensible—to 2-D/3-D morphology for branching, to equal-acceleration and amplitude sweeps for loading pathway disambiguation, and to benchtop validation in Lithium cells—thereby providing a clear path from diagnostic modelling to a deployable design tool for safer, vibration-tolerant battery systems. The method provides a repeatable, unit-safe way to study how dynamic degradation works, and understanding this mechanism can improve battery design and operational strategies to enhance safety and lifespan. These insights suggest that controlling vibration frequencies during battery operation could mitigate dendrite formation, informing both manufacturing standards and real-time monitoring protocols for enhanced battery safety.