The increased use of batteries requires their improvement in terms of safety as well as quality, reliability and life (QRL). The EU-funded INSTABAT project envisages observing in operando essential parameters of a Li–ion battery cell to provide higher accuracy states of charge, health, power, energy and safety (SoX) cell indicators. This will improve the batteries' safety and QRL. The project will develop a solution of smart sensing technologies and functionalities integrated into a battery cell. This solution will be able to perform reliable monitoring of key parameters, connect the evolution of these parameters with the physicochemical degradation phenomena taking place at the battery cell's core and improve the battery's functional performance and safety.