EXPERIMENTAL AND NUMERICAL STRATEGY FOR THE INTEGRATION OF SOLID-STATE BATTERY CELLS INTO HIGH- PERFORMANCE COMPOSITE STRUCTURES FOR AERONAUTICS

In the framework of the CleanSky2 THT project SOLIFLY, the present paper deals with a numerical and experimental evaluation of the residual mechanical performance of composite laminate structures made of unidirectional carbon/epoxy plies, widely used in the aerospace industry, in which solid battery
cells have been integrated, from the coupon scale to the stiffened panel level. Firstly, the manufacturing process to produce carbon/epoxy laminateds with functional battery cells was optimized and the electrical and mechanical properties of elementary coupons were estimated. Then, large multifunctional stiffened panels, representative of current aeronautical applications, were successfully manufactured and tested to evaluate the residual performances at a structural level. Finally, the limitations and perspectives associated with the production of efficient multifunctional composite structures are finally discussed.