Thermal Modeling Considering Anisotropy of the 280Ah Lithium Iron Phosphate Battery

The 280Ah Lithium Iron Phosphate (LFP) battery is used in several large energy storage systems due to its large capacity, high volumetric energy density after grouping and the simplification of other packaging systems. However, as the battery capacity increases, the volume also increases, resulting in a more pronounced anisotropy of the battery surface temperature. It is therefore necessary to perform thermal modelling for large volume batteries. This paper constructs a thermal model considering anisotropy for the 280Ah cell. The results show that the average temperature error is only about 3%, indicating that the model can accurately predict the surface temperature of the cell and is conducive to its thermal management.