COBRAPRO: A MATLAB toolbox for Physics-based Battery Modeling and Co-simulation Parameter Optimization

COBRAPRO (Co-simulation Battery Modeling for Accelerated Parameter Optimization) is a physics-based battery modeling software with the capability to perform closed-loop parameter optimization using experimental data. COBRAPRO is based on the Doyle-Fuller-Newman (DFN) model, also known as the pseudo-two-dimensional (P2D) model, which is a high-fidelity LIB model considering the lithium-ion mass and charge conservation in the liquid electrolyte and solid electrodes, and Butler-Volmer kinetics. Accurate parameter values are essential for the model to predict real battery behavior under various usage conditions. However, due to assumptions and simplications in the model, parameters obtained from cell teardown experiments cannot be directly used to obtain accurate simulation results. Parameter identification is therefore crucial for developing models that accurately capture battery dynamics. COBRAPRO enables users to identify these parameters using current-voltage data, optimizing DFN parameters by minimizing the error between simulated and experimental results through an integrated optimization routine.