<< The proposal of BAT-MAN is to make significant technologic innovations (especially relative to the techniques of estimation and diagnostics), realizing at the same time a product idea (realizing a prototype) that, on one hand can offer immediate and large-scale feedback on the solutions developed, and on the other can act as a forerunner to a series of applications based on the same technologies, either in areas closely related to accumulation systems, or in areas where advanced diagnostic and estimation techniques can bring a significant added value. >> [1] This thesis takes a step further in the development process of the industrial project BAT-MAN (Battery Management Device).