锂离子电池内部温度场的相似准则推导与有限元验证

从三维非稳态导热微分方程出发,利用量纲分析法推导了锂离子电池内部温度场相似所应满足的相似准则,并确定了实物对象与模拟对象之间的温度场相似关系.利用ANSYS软件进行了单层结构和多层结构锂离子电池温度场的有限元建模与计算,验证了所建立相似准则和相似关系的正确性.

Derivation and FEM Validation of Similarity Criterions of Temperature Field Inside of Lithium-ion Battery

The dimensional analysis method is employed to derive similarity criteria and the similarity coefficients of battery interior temperature fields based on the governing partial differential equations describing the three dimensional transient temperature field. To validate the similarity criteria and the similarity coefficients, three dimensional finite element models of battery temperature field are established on the assumption that the battery has single layer structure and multi layer structure. The simulation results show that the similarity criteria and the similarity coefficients prove to be correct, which can be used for battery temperature fields simulation and analysis.