Yatish Patel, PhD, Research Associate Mechanics of Materials, Mechanical Engineering, Imperial College, London
At the core of any BMS is a battery model. The main limiting factor on how fast battery models can be developed is the experimental technique used for collection of data required for model parametrisation. Currently this is a very time-consuming process. We present a novel, fast parametrisation testing technique. GITT (galvanostatic intermittent titration technique) tests are typically used to parameterise ECMs (equivalent circuit models) for batteries. If done well, a GITT test can take up to 80 hours to complete for a given temperature. If this is repeated at multiple temperatures, a full parameter set can take few weeks or even months to compile a comprehensive data set. The ESE group at Imperial College London has developed an innovative experimental technique which takes less than 8 hours to complete for each test temperature. Models parameterised using AMPP (Accelerated Model Parametrisation Procedure) are as good as those models parametrised using GITT, however, AMPP is 90% faster.