The 5S 15A Lithium Battery Protection Board is designed to protect 5-series (5S) 18650 lithium battery packs from common electrical faults such as overcharge, over-discharge, overcurrent, and short-circuit conditions. It ensures safe and stable operation of multi-cell battery packs by balancing individual cell voltages and preventing damage caused by improper charging or excessive load. Ideal for DIY battery packs, e-bikes, power banks, energy storage systems, and portable electronics requiring reliable multi-cell protection.

Features:

1. Protection for 5-series (5S) 18650 lithium battery packs
2. Supports continuous discharge current up to 15A
3. Provides overcharge, over-discharge, overcurrent, and short-circuit protection
4. Built-in cell balancing function for longer battery life
5. Ensures stable and safe battery operation during charging and discharging
6. Compact PCB design for easy integration into battery packs
7. Suitable for e-bikes, power tools, DIY battery packs, and energy storage applications

Specifications:

• Battery Configuration: 5S (5 × 3.7V lithium cells in series)
• Input Voltage (Charging): 21V – 22V
• Nominal Pack Voltage: 18.5V
• Operating Voltage Range: 15V – 21V
• Continuous Discharge Current: 15A
• Peak Current: 25A – 30A (varies by model)
• Overcharge Protection:

• • Cutoff Voltage: ~4.25V per cell

  • Release Voltage: ~4.15V per cell

• Over-discharge Protection:

  • Cutoff Voltage: ~2.7V – 2.8V per cell

  • Release Voltage: ~3.0V per cell

• Overcurrent Protection: ~25A – 35A (batch dependent)
• Short-Circuit Protection: Yes (auto recovery)
• Balancing Function: Yes (passive balancing)
• Balance Current: 30–50mA (typical)
• Operating Temperature: –20°C to +60°C
• PCB Size: Compact board (varies slightly by batch)
• Applications: E-bikes, power tools, solar storage, DIY power banks, robotics, and battery backup systems

Package Includes:

1 × 5S 15A 18650 Lithium Battery Protection BMS Module