The automotive World is experiencing the biggest change of its history passing frominternal combustion engine to a total electric mobility due to the request for a more greenand sustainable economy.This transition requires new skills and new devices that up to now are not so common in avehicle, the representative one is the huge battery pack, that provides the necessary amountof energy to supply the new generation electric motors. The battery pack its made by a bignumber of cells placed in series and in parallel each other in order to satisfy the requiredhigh voltage and high current specifications, so its necessary something that monitors theseparameters at which it is to add also the temperature’s monitoring, a very critical parameterfor the lithium-ion battery cells.