Hybrid Deep Learning with Temporal Data Augmentation for Accurate Remaining Useful Life Prediction of Lithium-Ion Batteries

TL;DR

This paper introduces CDFormer, a hybrid deep learning model combining CNNs, residual networks, and Transformers, with data augmentation techniques, to improve lithium-ion battery RUL prediction accuracy under complex conditions.

Contribution

The study presents a novel hybrid deep learning architecture and a composite data augmentation strategy that enhance RUL prediction robustness and accuracy for batteries.

Findings

CDFormer outperforms baseline models on real-world datasets.

Data augmentation improves model reliability under noisy conditions.

Multiscale feature extraction captures degradation dynamics effectively.

Abstract

Accurate prediction of lithium-ion battery remaining useful life (RUL) is essential for reliable health monitoring and data-driven analysis of battery degradation. However, the robustness and generalization capabilities of existing RUL prediction models are significantly challenged by complex operating conditions and limited data availability. To address these limitations, this study proposes a hybrid deep learning model, CDFormer, which integrates convolutional neural networks, deep residual shrinkage networks, and Transformer encoders extract multiscale temporal features from battery measurement signals, including voltage, current, and capacity. This architecture enables the joint modeling of local and global degradation dynamics, effectively improving the accuracy of RUL prediction.To enhance predictive reliability, a composite temporal data augmentation strategy is proposed, incorporating Gaussian noise, time warping, and time resampling, explicitly accounting for measurement noise and variability. CDFormer is evaluated on two real-world datasets, with experimental results demonstrating its consistent superiority over conventional recurrent neural network-based and Transformer-based baselines across key metrics. By improving the reliability and predictive performance of RUL prediction from measurement data, CDFormer provides accurate and reliable forecasts, supporting effective battery health monitoring and data-driven maintenance strategies.