Battery Management System (BMS) – I | SoC, DoD, BMS Functions & Battery Types | Electric Vehicles | Lecture 21

The Battery Management System (BMS) is one of the most critical components of an electric vehicle, ensuring the safe, reliable, and efficient operation of the battery pack. In this lecture, we introduce the fundamentals of the Battery Management System (BMS) and discuss why it is indispensable in modern electric vehicles. The lecture begins by explaining the key battery parameters, namely State of Charge (SoC) and Depth of Discharge (DoD), their mathematical expressions, and their significance in estimating the available battery capacity and charging status.

The lecture then presents the basic functions of a Battery Management System, including key parameter monitoring, energy control management, battery state analysis, information management, and safety protection. You will learn how a BMS continuously monitors battery voltage, current, and temperature, performs cell balancing, manages charging and discharging, estimates State of Charge (SoC), State of Health (SoH), and State of Function (SoF), while protecting the battery against over-temperature, over-current, over-charge, and over-discharge conditions. The lecture concludes with an introduction to primary and secondary batteries and compares commonly used battery chemistries such as Lead-Acid, NiCd, NiMH, and Lithium-ion based on energy density, cycle life, voltage, charging temperature, safety, and cost.

Topics Covered

Introduction to Battery Management System (BMS)
State of Charge (SoC)
Depth of Discharge (DoD)
Importance of BMS in Electric Vehicles
Key Parameter Monitoring (Voltage, Current & Temperature)
Energy Control Management
Battery State Analysis (SoC, SoH & SoF)
Safety Protection Functions
Charging, Discharging & Cell Balancing Control
Battery Information Management
Primary and Secondary Batteries
Comparison of Battery Chemistries

Who Should Watch?

B.Tech. and M.Tech. students
Power Electronics learners
Electric Vehicle enthusiasts
GATE and ESE aspirants
Researchers working on battery technologies and EV energy storage systems
Engineers designing Battery Management Systems and EV battery packs

Recommended References

Gregory L. Plett, Battery Management Systems, Volume I: Battery Modeling, Artech House.
Gregory L. Plett, Battery Management Systems, Volume II: Equivalent-Circuit Methods, Artech House.
Iqbal Husain, Electric and Hybrid Vehicles: Design Fundamentals, 3rd Edition, CRC Press.

#BatteryManagementSystem #BMS #ElectricVehicles #Battery #StateOfCharge #SOC #DepthOfDischarge #DOD #StateOfHealth #SOH #BatteryMonitoring #CellBalancing #BatteryProtection #LithiumIonBattery #EVBattery #PowerElectronics #ElectricalEngineering #EngineeringStudents #GATE #NPTEL #IITRoorkee