Key Features

✔ 5S Li-ion/LiPo Protection – Works with 5-cell series batteries (18.5V–21V). ✔ High Current Handling – 15A continuous discharge (25A peak). ✔ Multi-Protection Functions:

• Overcharge Protection (4.25V±0.05V per cell)

• Over-Discharge Protection (2.5V±0.05V per cell)

• Overcurrent & Short-Circuit Protection (Auto-cutoff)

• Temperature Protection (Optional NTC thermistor support) ✔ Cell Balancing – Ensures uniform voltage across all 5 cells. ✔ Low Power Consumption – <50μA standby current. ✔ Compact & Durable – PCB design with robust solder pads.

Technical Specifications

• Battery Type: 5S Li-ion/LiPo (e.g., 18650, 26650, prismatic cells)

• Nominal Voltage: 18.5V (Full charge: 21V)

• Charge Voltage: 21V (4.2V per cell)

• Max Continuous Discharge Current: 15A

• Peak Current (5s): 25A

• Protection Thresholds:

  • Overcharge: 4.25V±0.05V/cell

  • Over-Discharge: 2.5V±0.05V/cell

  • Overcurrent: 30A±5A (short-circuit)

• Cell Balancing Current: 35mA±5mA

• Dimensions: 60mm × 70mm × 4mm

• Weight: ~35g

Applications

• Electric Scooters & Bikes – Protect 21V battery packs.

• Solar Power Systems – Lithium battery storage management.

• High-Power Tools – Drills, saws, and other equipment.

• DIY Power Banks – High-voltage portable energy.

• Backup Power – UPS, emergency lighting, and industrial systems.

How It Works

1. Connect Battery Cells – Wire 5 cells in series to B-, B1, B2, B3, B4, B+ (see diagram).

2. Charge/Discharge Ports:

   • P+/P-: Connect to load (discharge) or charger (charge).

3. Automatic Protection:

   • BMS cuts off power if voltage/current exceeds safe limits.

4. Balancing Function:

   • Equalizes cell voltages during charging.

Package Includes

• 1 × 5S 15A BMS Module

Why Choose This BMS?

✅ All-in-One Safety – Full protection against overcharge, over-discharge, and shorts. ✅ High Power Support – Handles up to 15A continuous (25A peak). ✅ Cell Balancing – Extends battery lifespan. ✅ Easy Installation – Clearly labeled terminals for quick setup.