Energy Storage Science and Technology ›› 2023, Vol. 12 ›› Issue (4): 1215-1222.doi: 10.19799/j.cnki.2095-4239.2022.0652

• Energy Storage Test: Methods and Evaluation • Previous Articles     Next Articles

Remaining useful life prediction of lithium-ion batteries based on ResNet-Bi-LSTM-Attention model

Pengkai WANG(), Xinyan ZHANG(), Guanghao ZHANG   

  1. School of Electrical Engineering, Xinjiang University, Urumqi 830046, Xinjiang China
  • Received:2022-11-04 Revised:2022-11-20 Online:2023-04-05 Published:2023-05-08
  • Contact: Xinyan ZHANG E-mail:1360174241@qq.com;13203987062@163.com

Abstract:

Accurate prediction of remaining useful life (RUL) of lithium-ion batteries is an important research topic as it can help reduce the risks of lithium-ion battery accidents. Thus, this research proposes a prediction model of RUL of lithium-ion batteries that comprises an attention mechanism and combines the advantages of residual neural network (ResNet) and bidirectional short-term memory network (Bi LSTM). For this, the characteristic parameters that can represent the battery life were selected as the input quantity. ResNet was used to extract the implicit characteristic information of the input data and Bi LSTM was used to predict the time series information. The attention mechanism was used to distribute the weight of the prediction results so as to obtain the final RUL prediction results of lithium-ion batteries. The RUL prediction test of lithium-ion batteries was carried out using the open-source dataset provided by the University of Maryland (CALCE) of the United States, and the obtained results were compared with that of the existing prediction models. The test results show that the proposed model can accurately predict the RUL of lithium-ion batteries, with relatively low errors and good accuracy. Finally, the generalization experiment was carried out using the open-source dataset of lithium-ion batteries provided by NASA, and its results confirmed that the proposed model has good accuracy in predicting the RUL of different batteries and, thus, has wide applications.

Key words: lithium-ion battery, residual neural network, bidirectional long short-term memory network, attention mechanism, remaining service life prediction

CLC Number: