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

The 5S 15A Lithium Battery Protection Board is a reliable BMS (Battery Management System) designed to protect and regulate 5-cell 18650 Li-ion battery packs (nominal 18.5V, charging up to 21V). It offers complete protection functions including overcharge, over-discharge, overcurrent, overload, and short circuit protection. Ideal for alarm systems, DIY power solutions, and portable electronics.

Equipped with low power consumption design, it ensures minimal battery drain when idle. The module uses high-quality MOSFETs rated at 35V to manage both charging and discharging currents up to 15A continuously, and supports 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 ensures stable, balanced, and safe operation for 5-cell Li-ion battery packs used in various electronic applications.