Accelerated degradation model for C-rate loading of lithium-ion batteries

•The main focus is accelerated testing and degradation modeling of Li-ion batteries.•Discharge C-rate variable has been investigated for accelerating the battery testing.•The model is inspired by the physics of SEI layer formation.•The model utilizes historical degradation data for better generalization capability.•The non-linear mixed effect regression technique has been used to capture the battery-to-battery variations.