The current trend towards an ever greater electrification of vehicles brings to life a whole series of new stimulating design issues. Among these, the aging process that affects Lithium-ion batteries life is of particular importance since it turns out to be extremely sensitive to the variation of operating conditions that normally occurs in the electric ESS (energy storage systems) installed on hybrid and electric vehicles, namely the fluctuations of temperature, C-rate and DOD (depth of discharge). In this work, in hopes of examining interesting aspects of the aforementioned topic, a quasi-static model of a plug-in hybrid vehicle, inspired by the Jeep® Renegade 4xe, has been implemented in Simulink (by MathWorks®) with the purpose of evaluating how a reasonable management of the battery temperature, aimed at safeguarding the battery life and obtained by means of a PSO (particle swarm optimization), affects the actual exploitation of the electric power during driving missions..