A novel neural network model with cascaded structure for state-of-charge estimation in lithium-ion batteries

Abstract

In this article, a new methodology is proposed to achieve high accuracy estimation of battery state-of-charge (SOC). In this method, AdaBoost-AOA-BPNN model employs an arithmetic optimization algorithm (AOA) to optimize the threshold values and initial weight of back propagation neural network (BPNN). In addition, this model is employed as a strong learner, leveraging the AdaBoost technique to integrate multiple AOA-BPNN sub-models as weak learners. The final prediction output is obtained by the sum of the output of each sub-model/weak learner multiplying a corresponding weighing factor. The weighting factor is adaptively adjusted by assigning greater importance to highly correlated sample and reducing the significance of samples with low correlation. This paper presents theoretical discussions and findings from a proof-of-concept experimental model to assess and verify the effectiveness of the AdaBoost-AOA-BPNN framework.

Keywords

• State of charge
• AdaBoost algorithm
• Arithmetic optimization algorithm
• strong leaner and weaker learner
• neural network