5S 15A 18650 Li-ion Lithium Battery BMS Module for 18V-21V Battery

The 5S 15A 18650 Li-ion Lithium Battery BMS is a compact and reliable protection board designed for 5-series (5S) lithium battery packs with a working voltage range of 18V–21V. It provides essential protection features such as overcharge, over-discharge, overcurrent, and short-circuit protection to ensure safe and stable battery operation. Ideal for power tools, DIY battery packs, e-bikes, LED lighting systems, and portable energy storage devices.

Features:

1. Designed for 5S Li-ion battery packs (18V–21V)
2. Supports continuous discharge current up to 15A
3. Overcharge and over-discharge protection for extended battery life
4. Short-circuit and overcurrent protection for safe operation
5. Balancing function for maintaining equal cell voltage
6. High-quality MOSFET and PCB design for stable performance
7. Suitable for power banks, cordless tools, DIY packs, LED systems, robotics, and portable devices

Specifications:

• Battery Type: Li-ion / Lithium 18650 (5S)
• Nominal Battery Voltage: 18.5V
• Charge Voltage: 21V (max)
• Continuous Discharge Current: 15A
• Overcharge Detect Voltage: ~4.25V ±0.05V per cell
• Overcharge Release Voltage: ~4.10V ±0.05V per cell
• Over-discharge Detect Voltage: ~2.7V ±0.1V per cell
• Over-discharge Release Voltage: ~3.0V ±0.1V per cell
• Balance Current: 30–60mA (typical)
• Protection Type: Overcharge, Over-discharge, Short Circuit, Overcurrent
• PCB Material: FR4 high-strength board
• Operating Temperature: –20°C to +60°C

Package Includes:

1 × 5S 15A 18650 Li-ion Lithium Battery BMS Protection Board

1 × Balance Cable