Developing an advanced battery management system

Abstract

This dissertation presents the development and validation of an advanced battery management system (BMS) for optimizing temperature regulation in multi-cell prismatic lithium-ion battery packs used in electric vehicles. The primary objective was to design a system capable of maintaining thermal consistency (<1°C) between batteries during dynamic charging/discharging operations. The BMS utilizes a Digital Signal Processor (DSP) to control current and temperature in real-time, employing both Proportional-Integral (PI) control and gradient optimization algorithms. Experimental results demonstrated a threefold improvement in temperature uniformity when utilizing the gradient optimization algorithm, with the temperature difference between batteries reduced to less than 1°C after 30 minutes of operation. The proposed system effectively addresses the challenges of thermal management in high-capacity battery packs, ensuring better longevity and performance.