Informační displej pro BMS

Abstract

This master's thesis addresses the increasing demand for precise diagnostics in modern battery systems at MGM Compro, s.r.o. The current state of visualization using LED bargraphs exhibits a significant information deficit, which prevents detailed monitoring of physical parameters in the field without external diagnostic tools. The objective of this work is to design and implement an autonomous information display that enables real-time monitoring of cell status and operation history. The proposed solution utilizes an STM32U5 microcontroller with GPU acceleration and a 3.5" IPS panel with optical bonding for sunlight readability. For the power supply, a synchronous buck converter based on MAX17761 was designed to cover a voltage range of 10 V to 68 V. The theoretical power supply design and stability calculations were practically verified through laboratory measurements, confirming reduced voltage ripple and a peak efficiency of 83.7%. The software section implements FreeRTOS, the TouchGFX framework, and adaptive brightness control according to the CIE 1976 standard. The resulting prototype provides a robust diagnostic platform that enhances the safety and utility of the entire battery system.