The development of new battery cell technologies and architectures goes hand in hand with the search for new concepts for battery modules and their integration into the overall battery package. The main driver is the search for the optimal configuration that maintains the performance of the battery technology, considering electrical and thermal as well as mechanical aspects. In addition, the proposed modules should typically be stackable, with standardised connections to electrical and possibly thermal management systems of the battery. This increases the flexibility of the battery system and contributes to the feasibility of second-hand applications, which fits into the circular economic model envisioned by Europe. This activity is firmly supported and substantiated by EnergyVille experts on battery materials and cell behaviour in different applications and environmental conditions.