Battery Management System for Electrical Vehicles

This repo contains the final project of @lusho2206, @fededc88 and @moyamartin needed to finish the Bachelor degree in Electrical Engineering from the Faculty of Exact Sciences and Land Surveying which belongs to the National University of Rosario

Introduction

Electrical Vehicles, based on Lithium Ion battery packs, are considered one of the most important technological breakthrough of the last years mainly due to their low emissions to the environment and the lack of dependency with fosil fuels.

Nevertheless, the energy source from these kind of vehicles are quite sensitive and they need a control unit to operate properly. This control unit is known as a Battery Management System. These kind of devices are in charge of monitoring and protecting the battery packs implementing the following functionalities:

• Protect the battery pack in order to work in the safety operation area (SOA) taking into account the voltage, current and temperature of the pack
• Balance the individual cells of the battery pack.
• Estimate the state of charge (SoC) of the battery pack.
• Estimate the state of health (SoH) of the battery pack.
• Publish this information to a on-board computer of the vehicle

Description

Taking into account the latter functionalities, the goal of this project is to develop a BMS able to:

• Estimate the SoC
• Equalize the unbalanced cells
• Protect the battery pack
• Report the status of the battery through RS232 and CAN protocols.

This can be summarized in the following block diagram:

Folder structure

This repo is separated in four different submodules, so in order to clone this repo and get all the modules run:

git clone https://github.com/moyamartin/bms_unr.git --recurse-submodules -j<n_cores>

Each folder contains a different module of the project:

• bms_hardware: Contains hardware development and production files
• bms_firmare: Contains firmware source files and binaries for production
• bms_documentation: Contains all the related documentation to thi proyect
• bms_simulation: Contains the battery mathematical model as well as all the algorithms simulated to accomplish the different goals of the proyect