3S 11.1V 10A Li-Ion Cell BMS Charging Protection Module

Product Overview

The 3S 11.1V 10A Li-Ion Cell BMS Charging Protection Module is a compact, high-performance battery management system designed for 3-cell (3S) 11.1V Lithium-Ion and Lithium-Polymer battery packs. With a continuous discharge rating of 10A and robust protective functions, this 3S 11.1V BMS is ideal for robotics, drones, LED lighting, portable electronics, and DIY battery projects.

Key Features

• Designed for 3S (11.1V) Li-Ion / Li-Po battery packs
• Continuous discharge current: 10A
• Peak overcurrent cutoff: ~15A
• Overcharge cutoff: ~4.25 ±0.05V per cell
• Over-discharge cutoff: ~2.7 ±0.1V per cell
• Built-in overcurrent and short-circuit protection
• Integrated cell balancing for equal charge and longer pack life
• Compact PCB form factor for easy integration into custom packs and projects

Protections and How It Works

• Overcharge protection: The BMS disconnects charging when any cell reaches approximately 4.25V to prevent overvoltage stress.
• Over-discharge protection: The load is disconnected when any cell drops near 2.7V to prevent permanent cell damage.
• Overcurrent protection: The module cuts power if current exceeds the safety threshold (approx. 15A peak), protecting wiring and cells.
• Short-circuit protection: Rapid response protection prevents excessive current flow in fault conditions.
• Cell balancing: Passive balancing keeps all three cells within a narrow voltage window for maximum usable capacity and longer cycle life.
• Automatic recovery: The BMS will restore output once voltage and current return to safe ranges, simplifying reuse after a trip event.

Technical Specifications

• Supported configuration: 3S (3-cell) 11.1V Li-Ion / Li-Po
• Continuous discharge: 10A
• Peak overcurrent cutoff: ~15A
• Overcharge cutoff voltage: ~4.25 ±0.05V per cell
• Over-discharge cutoff voltage: ~2.7 ±0.1V per cell
• Operating temperature: -20°C to +60°C
• Charger compatibility: CC/CV Li-Ion chargers
• PCB: Compact design for easy integration into battery packs and devices

Applications

• DIY 11.1V battery pack builds
• Robotics and automation systems
• LED lighting and strip installations
• Portable electronic devices and tools
• Small RC models and drones
• IoT power modules and remote sensors

Installation and Usage Tips

• Use a compatible CC/CV charger set for 3S Li-Ion/Li-Po chemistry.
• Verify correct cell order and balance leads before connecting to avoid damage.
• Ensure wiring and connectors are rated above the 10A continuous current for safety margins.
• Keep the module within the specified operating temperature range for reliable protection.
• Periodically check cell voltages to confirm balancing is working as expected.

Why Choose This 3S 11.1V 10A Li-Ion BMS

This BMS combines proven safety features with integrated cell balancing and a compact footprint, making it an excellent choice for hobbyists and small-scale professional projects that need reliable 11.1V battery protection without adding bulk.

Note: Images are for illustration purposes only.