fig3
Figure 3. SOH estimation and prediction at 25 °C. (A) Estimated (red curve) and measured (blue curve) capacity for the testing cell (marked as 25C05 in the EIS dataset). The coefficient of determination R2 of this model is displayed in the bottom left corner. Five-fold cross-validation was utilized to obtain a mean value derived from the outcomes of five distinct models which trained on 80% of the data and validated on the rest 20%; (B) Prediction of the capacity fade path (green curve). The red curve is the estimated capacity of the initial 50 cycles. Blue curve is the measured capacity for the 25C05 cell. The capacity is normalized relative to the initial capacity in each case. The shaded area in (A) and (B) plots indicates ±1 standard deviation. SOH: State of health; EIS: electrochemical impedance spectroscopy.
