Visual modelling assumes a graphic form of model description and visual representation of research results. The main element of modelling system representation is a block diagram. Owing to appearance of this line of investigation («object-oriented modelling») a software was produced (for example, Simulink in MatLab). The examples of ordinary differential equations solving schemes for initial stage discharge of lead-acid battery positive electrode visual modelling are presented. The comparative analysis of two algorithms (a shooting method and algorithm similar to back propagation algorithm used in the neural networks theory) also is carried out.