A Neural Network Application for a Lithium-ion Battery Pack State-of-Charge Estimator with Enhanced Accuracy

The State-of-Charge (SOC) real-time estimation plays an essential role in effective energy management. This paper proposes the use of an Artificial Neural Network (ANN) to design a state of charge estimator for a Graphite/LiCoO2 lithium-ion battery pack. The software MATLAB was used to develop and test several network configurations to find the ideal weights to perform the ANN. Results demonstrate that the Mean Squared Error (MSE) achieved rendered the ANN as an effective technique. Thus, it predicted the battery bank’s SOC values with accuracy using only voltage, current, and charge/discharge time as input.