DegradAI: A scalable framework for early battery health diagnosis from limited data

DegradAI is a chemistry-aware deep learning framework designed to predict long-term lithium-ion battery capacity fade using limited early-cycle data (~5 h), enabling robust diagnostics across diverse chemistries and real-world operating conditions. Its novelty lies in explicit cathode chemistry identification (LiNiCoAlO2, LiNiMnCoO2, LiFePO4, and LiCoO2) integrated with a dynamically adaptive architecture. Comprehensive validation across varied temperatures, discharge rates (0.5–3 C), and dynamic cycling profiles demonstrates scalability and transferability. High accuracy is achieved across most chemistries, with a noted variation for LiNiCoAlO2 due to complex degradation mechanisms. DegradAI can also generate high-fidelity synthetic data; augmenting training sets with an 80:20 synthetic-to-real data mix significantly reduced experimental data needs, improving relative prediction accuracy by up to ~22% while incurring a quantifiable trade-off (~7% increase) in absolute error metrics. This scalable framework is a valuable tool for battery health management in applications like electric vehicles, consumer electronics, and grid storage, adaptable to emerging chemistries.