An Adaptable Lithium-Ion Battery Model

Abstract

We present here a complete model of a Sony 18650HC lithium-ion battery developed in MATLAB/Simulink, which is adaptable to other lithium-ion cell chemistries and can be implemented into a full power system model. The model accounts for varying current rates, temperature dependencies and internal cell characteristics under both charge and discharge conditions and is primarily based on characterisation tests of the 18650HC cell with the addition of standard thermal equations and electrical relationships. The model can be adapted to fit other types of lithium-ion cell chemistries when the characterisation profile for that chemistry is created using our testing procedures. Comparisons between the model and experiments conducted on test cells have shown very accurate results and the adaptability of the model has been proven. This allows us to test and model newer cell technologies for which commercial data may not yet be available.

Optimal charging for general equivalent electrical battery model, and battery life management

“…The temperature dynamics are as follows (For more details about thermal models refer to [1], [34], [35], [36], [37], [38], [39], [40]):…”