Artificial Intelligence and Machine Learning

Fast Data Augmentation to Improve Degradation Trajectory Prediction Data-driven degradation prediction models can suffer from the inadequacy of high-quality training data. Li et al 2025 mitigated this issue by generating capacity fade curves synthetically using 3 parameters: Offset (governs cell-to-cell manufacturing variability), Slope (related to the rate of capacity fade) and Elongation (determines the occurrence of the “capacity kneeˮ and the EOL. Training datasets were constructed by: (a) augmenting, and (b) partially replacing seed data (from the lab and field) with synthetic data. The viability of this method was demonstrated by successfully predicting the trajectory with deep and traditional ML models - CNN and GPR, respectively, though its performance in higher dimensional feature spaces remains to be seen.

Cell-testing efforts can be reduced by at least 50% by substituting synthetic data into an existing dataset. The addition of synthetic data showed an increase in prediction accuracy, while the partial replacement of real data with synthetic data led to similar model performances using limited data. Source: W. Li et al., Energy and AI 2025

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