Reliability Assessment of NMC Li-Ion Battery for Electric Vehicles Application

Lithium-ion batteries have been a good solution to provide energy for modern mobility system over the last few decades. Moreover, the reliability evaluation of the Li-ion batteries has an important role in terms of design, lifetime service and maintenance for the battery pack in electric vehicles (EVs). In this research, the performance of Carbon/ Nickel-Manganese-Cobalt (C/NMC) based lithium batteries from a reliability point of view, in the high and low temperatures have been investigated. In order to evaluate reliability in the battery cells, power and capacity fades have been introduced as reliability indexes in this research. The experimental result shows that the aging (power fade and capacity fade) of C/NMC battery in low temperature is slower than in high temperature. Moreover, the rate of the error between the proposed degradations and degradation modes with experimental results are 5% and 2% for power and capacity fades, respectively.