Identification battery cell model parameters

To estimate the SOC by the EKF, I need to specify the parameters of the battery equivalent circuit model. How to determine these model parameters at different temperatures? Must these parameters be obtained by laboratory testing or is there a pre-prepared data set for different thpes of batteries?

Actually i read some information about pulse dischrage method and curve fitting for battery cell parameters extraction but unfortunately i dont understand.

Im trying to implement a BMS using STM32f4xx.

Answer 1

[Xiangchun]

Hi Erfan,

To estimate ECM parameters for batteries, please refer to this example Characterize Powertrain Blockset and Simscape Battery Blocks (App) - MATLAB & Simulink.

To read more about the workflow, please refer to Hybrid Pulse Power Characterization (HPPC) Parameter Estimation - MATLAB & Simulink.

Yes, we do need to collect experimental data of voltage response to current profiles such as HPPC in the lab.

Best regards,

Xiangchun