LIAO Weiqiang, ZHANG Mengyuan, WANG Yilong, et al. Capacity prediction of lithium-ion batteries based on a VAE-STAGCNN model[J]. Power System Protection and Control, 2026, 54(13).
DOI:
LIAO Weiqiang, ZHANG Mengyuan, WANG Yilong, et al. Capacity prediction of lithium-ion batteries based on a VAE-STAGCNN model[J]. Power System Protection and Control, 2026, 54(13).DOI: 10.19783/j.cnki.pspc.260016.
Capacity prediction of lithium-ion batteries based on a VAE-STAGCNN model
Lithium-ion battery capacity prediction faces challenges such as complex operating conditions
high testing costs
and highly nonlinear degradation processes. Traditional data-driven methods often suffer from limited accuracy and generalization capability in scenarios with scarce data. To address these issues
this paper proposes a prediction method that integrates variational autoencoder (VAE) with spatiotemporal attention graph convolutional neural network (STAGCNN). First
the latent distribution of battery aging is learned using a VAE
and diversified samples are then generated through latent space resampling
thereby enhancing data coverage and model robustness under small-sample conditions. Second
multidimensional battery features are represented as graph nodes
and an adjacency matrix is dynamically generated based on feature correlations. A temporal attention mechanism is further introduced to achieve collaborative modeling of spatial associations and temporal dependencies. Finally
experiments are conducted using real-world battery datasets. The results show that the proposed model significantly improves the prediction accuracy while exhibiting promising cross-battery generalization capability.
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references
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