Mathematical model creation for the lithium-ion battery and its comparing with analogs

BACKGROUND: With increased emphasis of world community on climat change problems automotive industry liders shift stress on the design and mass production of vehicles equipped with electric power plants. The battery as the most important and crucial part of any vehicle, in turn needs a detailed analysis on the stage of its digital prototype design. Accurate prediction for the designed battery performance and its real-time follow-up are possible only at using the adequate mathematical model of the battery.

AIMS: To study the existant simulating models for a lithiumion battery operation, to compair their results with the expaeriment data and to increase accuracy using the designed dynamic model considering the hysteresis processes.

MATERIALS AND METHODS: Modeling is fulfilled on the base of Matlab programme and using Simcenter Amesim simulation platform, that allowed to assemble the virtual stand for lithium-ion cell operation with the electric storage library components.

RESULTS: Cell operation model is created in Amesim, the basic principles for electrothermal modeling of an accumulator element considering the hysteresis. Script driven simulating the models in Amesim and Matlab software was carried out for the real electric engine cell loading at city movement. Model results have being compared with experimental data.

CONCLUSIONS: Practical value of the study is possibility of using the designed mathematical model for battery control system developement and for optimization of electromobile power equipment operation for account of the best quality of the models used.