3S 40A 18650 Li-Ion Battery Protection Board (BMS) with Cell Balancing

The 3S 40A 18650 Battery Protection Board (BMS) is designed to manage and protect 3-cell lithium-ion battery packs used in high-power applications. It provides comprehensive battery protection by monitoring individual cell voltages and current levels during charging and discharging. The integrated balancing function helps maintain equal voltage across all cells, improving battery performance and extending service life. With support for up to 40A continuous discharge current, this BMS is ideal for e-bikes, power tools, solar energy storage systems, robotics, and DIY battery pack projects.

• Designed for 3S lithium-ion battery packs
• Compatible with 18650 Li-ion cells
• Supports continuous discharge current up to 40A
• Integrated cell balancing function
• Overcharge protection for each cell
• Over-discharge protection for each cell
• Overcurrent protection
• Short-circuit protection with auto recovery
• Stable battery charging management
• Improves battery lifespan and performance
• Suitable for high-power applications
• Reliable battery voltage monitoring
• Compact PCB design for battery integration
• Ideal for DIY and commercial battery packs

• Battery Type: Lithium-Ion (Li-Ion)
• Battery Configuration: 3S (3 Cells in Series)
• Nominal Battery Voltage: 11.1V
• Charging Voltage: 12.6V
• Maximum Continuous Discharge Current: 40A
• Balance Function: Yes
• Overcharge Detection Voltage: 4.25V ± 0.05V
• Over-Discharge Detection Voltage: 2.7V ± 0.1V
• Overcharge Protection: Yes
• Over-Discharge Protection: Yes
• Overcurrent Protection: Yes
• Short Circuit Protection: Yes
• Recovery Method: Automatic Recovery
• Application: Battery Pack Protection and Management

• The complete Guide to using 3S 40A Lithium BMS Battery Charger