Unlocking electrochemical battery modelling: an open-source suite comparison methodology

This paper presents a methodology to compare open-source suites for electrochemical battery simulations in terms of simulation output and computation time. The proposed approach leverages the Battery Parameter eXchange standard to introduce a parameter porting framework that supports the implementation of equivalent cell parameters across suites, and provides a method for solver tolerance selection used for computational speed comparison. The methodology is showcased by comparing two of the most comprehensive open-source suites, PyBaMM and TOOFAB. While both provide lean model implementation, PyBaMM shows more versatility and faster mean simulation times, with TOOFAB closing the gap on simulations with coarser discretizations, particularly when order reductions are applied. Furthermore, considering portability to C and implementation simplicity, TOOFAB has a strong advantage.