
Fig. 1.
Hybrid LSTM-EKF architecture for SOC estimation

Fig. 2.
Experimental voltage, current, temperature and SoC profiles of a lithium-ion battery cell during the discharge process

Fig. 3.
Training and validation loss for LSTM Model

Fig. 4.
Evolution of the adaptive fusion factor (αk)

Fig. 5.
SoC Estimation results using LSTM, BiLSTM, LSTM-Attention, EKF and LSTM-EKF

Fig. 6.
Comparison of RMSE and MAE for different SoC estimation methods