The 3S 10 A 18650 Lithium Battery Protection Board is a compact Battery Management System designed to safely manage three series-connected 18650 Li-ion cells. It provides essential protection against overcharge, over-discharge, overcurrent, and short-circuit conditions, ensuring stable performance and extended battery life. This BMS is ideal for DIY battery packs, robotics, portable electronics, and embedded power systems requiring a 12 V-class lithium supply.
Core Board Specifications
• BMS Type: 3S lithium battery protection board
• Supported Cells: 3 × 18650 Li-ion (series connection)
• Continuous Discharge Current: Up to 10 A
• Protection Functions: Overcharge, over-discharge, overcurrent, short-circuit
Electrical & Interface
• Nominal Pack Voltage: 11.1 V
• Maximum Charge Voltage: 12.6 V
• Balance Method: Passive cell balancing during charging
• Connection Pads: B+, B−, B1, B2, P+, P−
• Supported Chemistry: Li-ion only (not LiFePO₄)
Performance Characteristics
• Stable operation for moderate current loads
• Automatic cutoff under unsafe electrical conditions
• Balanced charging improves pack lifespan
• Reliable protection for DIY and embedded applications
Physical Characteristics
• Module Type: PCB-mounted BMS board
• Form Factor: Slim and lightweight
• Copper Traces: Designed for 10 A current handling
• Clearly labeled solder pads for easy assembly
Compatibility
• 3S 18650 Li-ion battery packs
• Robotics and automation systems
• Arduino, ESP32, and embedded power setups
• Portable tools and devices requiring ~12 V
Key Advantages
• Compact 3S battery protection solution
• Essential safety features for lithium packs
• Easy integration into custom battery builds
• Cost-effective power management option
Technical Insights
• Cells must be matched in capacity and health
• Balancing occurs during charging only
• Use a charger specifically rated for 3S Li-ion packs (12.6 V)
• Incorrect wiring can permanently damage the BMS
Applications
• DIY 3S 18650 battery packs
• Robotics and RC systems
• Portable electronics and tools
• Energy storage and backup systems
• IoT and embedded power solutions
Pro Tip
• Always connect the BMS before charging the battery pack
• Use identical cells from the same batch for best performance
• Insulate the BMS properly to prevent accidental shorts
• Verify individual cell voltages before final enclosure assembly
Package Includes
• 1 × 3S 10 A 18650 Lithium Battery Protection Board