BMS/Battery Protection Board-NGI Technologies Company Limited
Welcome to NGI website. NGI manufactures battery simulator, programmable DC power supply and DC electronic load. The industries NGI serves cover consumer electronics, fuel cell, new
Welcome to NGI website. NGI manufactures battery simulator, programmable DC power supply and DC electronic load. The industries NGI serves cover consumer electronics, fuel cell, new
PDF version includes complete article with source references. Suitable for printing and offline reading.
A 3S BMS (Battery Management System) is a circuit protection and monitoring device designed specifically for a 3-cell lithium-ion or lithium-polymer battery pack. It ensures the safe operation of the battery pack by balancing cell voltages, preventing overcharging, overdischarging, and overcurrent situations.
A BMS for lithium-ion batteries acts as the "brain" of the battery pack, continuously monitoring, protecting, and optimizing performance to ensure safe operation and maximum lifespan. Understanding how BMS technology works is essential for anyone involved with lithium-ion applications.
A BMS ensures: Controlled charging and discharging. Voltage and current stabilization. Cell balancing to maintain uniform voltage across cells. Protection against overvoltage, undervoltage, and short circuits. Enhanced safety and extended battery life.
The 3S configuration is a series connection of three cells, requiring a robust BMS to ensure balanced charging, overcharge protection, and efficient power delivery. We’ll focus on a straightforward yet highly effective design using the TL431 Zener diode, BD140 PNP transistor, LM317 regulator, 1N4007 diodes, LED indicators, and 20K potentiometers.