Vibration assessment of an LFP battery module for e-powertrains with innovative rCFRP enclosure

Lithium iron phosphate (LFP) batteries have emerged as a key technology in the electric vehicle sector due to their cost effectiveness, extended service life, and enhanced intrinsic safety. Their increasing adoption is further driven by high durability and reduced susceptibility to thermal runaway, with respect to the more widespread nickel manganese cobalt (NMC) batteries, making them particularly suitable for applications with stringent safety requirements. However, while battery research has predominantly focused on the cell level, comparatively limited attention has been devoted to the dynamic behavior of battery modules and packs under severe operating conditions, which may result in fatigue damage, electrical discontinuities, and resonance induced failures. In this study, the vibration response of an LFP battery pack prototype equipped with a recycled carbon fiber reinforced polymer (rCFRP) enclosure is experimentally investigated. The enclosure was developed as a lightweight alternative to a conventional glass fiber reinforced polymer (GFRP) solution. Vibration tests were conducted in accordance with standardized excitation profiles to evaluate the structural integrity and dynamic performance of the battery pack. The experimental results demonstrate stable and highly repeatable responses over multiple excitation cycles, together with a significant reduction in strain levels and a shift of the dominant dynamic response toward higher frequencies, which indicates the suitability of rCFRP enclosures for vibration resistant and mechanically reliable battery housing applications.