The invention discloses a battery life prediction method based on
Bayesian optimization and a
physical information neural network, and belongs to the field of battery health monitoring. The method comprises the following steps: collecting and preprocessing
lithium battery charging and discharging data, and then dividing the data into a
training set and a
test set; then, extracting a dQ / dV curve and other related features, constructing a
physical information neural network integrated with physical constraints, and optimizing hyper-parameters of the
physical information neural network by using a
Bayesian optimization algorithm; and training the model by using a
training set, updating parameters through back propagation in the process, evaluating precision by using a
test set, and adjusting a strategy. And finally, inputting the characteristics of the
lithium battery to be predicted into the trained model, outputting a
residual service life prediction value, and comparing with actual data evaluation. According to the invention, reliable
lithium battery life prediction can be provided for the photovoltaic
energy storage system, and the
system operation and maintenance efficiency can be significantly improved, the maintenance cost can be reduced, and the safe and stable operation of the
energy storage system can be ensured by early warning the health state of the battery in advance.