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Battery cell durability test & electrochemical modeling
As demand for fast charging in electric vehicles increases, battery cells are exposed to higher heat generation. This not only creates temperature gradients between cells, but also causes significant temperature differences within a single cell. While many studies have investigated battery durability with respect to the overall operating temperature, research on degradation under intra-cell temperature gradients remains limited.
In practical applications, the cooling strategy—whether single-sided or double-sided—significantly affects the thermal behavior of cells. To understand how these cooling methods influence the temperature distribution inside the cell and the resulting impact on performance and durability, both experimental and modeling approaches are necessary.
In SNUAL, we are conducting battery degradation experiments under different cooling conditions using long-term cycling tests. After the degradation cycling, the cells are disassembled and analyzed to investigate the physical mechanisms behind performance deterioration. The battery degradation model is based on an electrochemical (P2D) framework. By extending the conventional P2D model into three dimensions, we aim to capture the effects of temperature gradients within the cell under various cooling strategies. This integrated experimental and modeling approach enables a more accurate prediction of battery degradation mechanisms under realistic thermal conditions, ultimately contributing to the design of more robust battery systems for electric vehicles.
 - Battery cell degradation test & electrochemical modeling
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