Abstract: Battery modeling is important in power consumption optimization for which battery specifications are a critical consideration.The analytical battery model proposed by Daler Rakhmatov is quite successful in terms of prediction accuracy and popularity.Based on this model, this paper proposes a simple battery model for accurately predicting lifespan of lithium-ion batteries.Applicability of the proposed model is analyzed.The model covers cases of both constant lo ad and variable load.Accuracy of the battery lifespan predicted by the proposed model is validated by simulation results.

Key words: lithium-ion battery, battery model, battery lifetime prediction