锂离子电池中扩散引起的应力

Application ID: 65601


Diffusion-induced stress in lithium-ion battery electrode materials can occur as a result of compositional inhomogeneities during lithium intercalation in the host material particles. These stresses are important since the electrode host material can undergo significant volume changes during charging and discharging. The accumulated structural changes can induce electrode failure in the form of particle fracture. In order to quantify the stress generated in the electrode, the elastic deformation of the material must be related to the intercalation process.

This example uses the Lithium-Ion Battery interface for analyzing diffusion-induced stress caused by concentration changes within the negative host material electrode particles, during discharge and relaxation of a lithium-ion battery. The geometry is in one dimension and the model is isothermal.

案例中展示的此类问题通常可通过以下产品建模:

电池与燃料电池模块