Abstract:

The battery model is widely used in the simulation research of new power system.Based on the equivalent circuit model,to improve the accuracy,considering factors such as aging,temperature,and SOC,the structural parameters of the model were identified offline by conducting multiple linear regression processing on experimental data under multiple operating conditions.An equivalent circuit model based on multidimensional table lookup method was established,and the structure parameters of the model were obtained according to the table lookup and interpolation based on operating data to adapt to changes in battery operating conditions.The correctness of the model and the calculation strategy of non structure parameters SOC and SOH were verified by the design simulation and experimental examples.The calculation results show that the identification results of the model parameters are basically consistent with the transient process of the experimental test,and the correction of SOC using BMS meets the accuracy requirements.The proposed battery model algorithm achieves the expected results.

Key words: equivalent circuit model, parameter identification, multidimensional table lookup method, model application