2S 7.4v 18650 protection module

The 2S 7.4V 18650 Lithium-Ion Battery Protection Module is designed to manage the safe charging and discharging of a 2-cell (2S) lithium-ion battery pack. It offers comprehensive protection features including overcharge, over-discharge, overcurrent, and short circuit protection, making it ideal for powering DIY electronics, battery packs, and portable devices. With compact dimensions and low internal resistance, it's well-suited for compact and efficient battery management systems.

Key Features

• Built-in overcharge, over-discharge, overcurrent, and short circuit protection

• Optimized for 2S 7.4V lithium-ion battery packs

• Supports up to 3A continuous charging current and 2A discharging current

• High efficiency with low internal resistance (< 45mΩ)

• Lightweight and compact design for embedded battery pack applications

• Simple wiring terminals (B+, B−, P+, P−, MB) for easy integration

• Operating temperature range from -40°C to +50°C

Specifications

• Battery Type: Lithium-ion, 2S (2 cells in series)

• Charging Voltage: 8.4V to 9V

• Charging Current: Max 3A

• Discharge Current: Max 2A

• Overcharge Voltage per Cell: 4.25V – 4.35V ± 0.05V

• Over-discharge Voltage per Cell: 2.3V – 3.0V ± 0.05V

• Transient Current Limit: 5A

• Internal Resistance: < 45mΩ

• Temperature Range: -40°C to +50°C

• Connector Pads:

  • B+ / B−: Connect to battery terminals

  • P+ / P−: Output terminals (load/charger)

  • MB: Middle point between the two 18650 cells

Applications

• 2S (7.4V) Lithium-ion battery packs

• DIY power banks and portable power supply systems

• Battery-powered IoT and embedded systems

• Robotics and microcontroller projects requiring regulated power

• Rechargeable LED lighting systems