5S 15A 21V Li-ion Battery Protection Board – 18650 BMS Charging Module

The 5S 15A Lithium Battery Protection Board is a robust Battery Management System (BMS) engineered to safeguard and regulate 5-cell 18650 Li-ion battery packs. With a nominal voltage of 18.5V and a charging capacity reaching up to 21V, this BMS module is perfect for alarm systems, DIY power solutions, and portable electronics. It provides comprehensive protection features including overcharge, over-discharge, overcurrent, overload, and short circuit protection.
Featuring a low power consumption design, this board ensures minimal battery drain when in idle mode. It employs high-grade MOSFETs rated at 35V to control both charging and discharging currents up to 15A continuously, and can handle a peak charging current of 56A.

✅ Key Features:

• Model: 5S 15A Li-ion BMS Protection Board
• Battery Support: 5-series 18650 lithium battery packs (5S – 21V max)
• Overcharge / Overdischarge Protection: YES
• Overcurrent & Overload Protection: YES, up to 60A
• Short Circuit Protection: YES
• Low Quiescent Current: Only 30µA per cell
• Section-to-section current draw: 3µA

? Specifications:

• Supply Voltage: Max 21V
• Charging Voltage (MOS): 35V
• Discharging Voltage (MOS): 35V
• Charging Current: Max 56A
• Continuous Discharge Current: 15A
• Overcurrent Protection Threshold: 50A / 55A / 60A
• Self-consumption (per cell): 30µA
• Cross-cell Consumption: 3µA
• Operating Temperature: Standard
• Application: Alarms, DIY packs, voltage regulation circuits

This BMS module guarantees stable, balanced, and secure operation for 5-cell Li-ion battery packs utilized in a variety of electronic applications, making it an ideal choice for both electronics engineers and hobbyists.