Grey prediction method for forecasting the capacity of lithium-ion batteries

The battery performance is gradually decreased over its cycle life as a result of capacity loss. This paper proposes a capacity forecasting method of lithium-ion battery pack using a grey predictor. In this method, the forecasted capacity of battery pack is obtained from the previous four measured capacity data. The prediction performance of the proposed method is verified through a comparison with the prediction results from the curve-fitting based method. The experimental results show that the proposed method can accurately predict a one-step-ahead capacity value even with a small number of data.