Orthogonal Autoencoder for Long-Term State-of-Charge Forecasting of Li-ion Battery Cells

Abstract

This paper proposes an Orthogonal Autoencoded Long-Short- Term Memory (OALSTM) network for long-term the State-Of-Charge (SOC) forecasting in Lithium-ion (Li-ion) battery cells. By leveraging the use of LSTMs in capturing temporal trends and orthogonal Autoencoder for extracting non- trivial robust latent features, OALSTM can achieve precise and accurate long-term SOC estimations near the end-of-life. One key contribution is learning orthogonal temporal encodings that generalize for long-term forecasting because it reduces the likelihood of false multicollinearity. Our results show that OALSTM outperforms other benchmark models for long-term SOC estimation of Li-ion battery cells under varying charging and discharging conditions.