This 3.7V 3A Protection Board (BMS) is designed for single-cell 18650 lithium-ion batteries and provides essential safety features without the complexity of cell balancing. Ideal for low- to medium-power battery-powered projects, this board ensures safe charging and discharging, protecting against overcharge, over-discharge, and overcurrent conditions.
Built with high-accuracy voltage detection and a multi-stage over-current protection system, it uses reliable MOSFET switching to manage battery flow. Compact and lightweight, it's perfect for integrating into small electronic devices, portable chargers, and DIY battery packs.
Features
High-Accuracy Voltage Detection – Prevents battery damage from incorrect charging/discharging.
Three-Stage Overcurrent Protection – Includes overcurrent level 1, level 2, and short-circuit protection.
MOSFET-Based Switching – Efficient control of charge/discharge paths.
Charger High-Voltage Tolerance – Safe to use with higher-voltage charging terminals.
Ultra-Compact Size – Slim form factor suitable for tight spaces.
Specifications
Battery Type Supported: Single-cell Li-ion (e.g., 18650)
Overcharge Voltage: 4.25V ± 0.05V
Overcharge Release Voltage: 4.23V ± 0.05V
Overdischarge Voltage: 2.54V ± 0.1V
Max Continuous Charge Current: 2A
Max Continuous Discharge Current: 2A
Overcurrent Protection Limit: 3A
Protection Method: MOS transistor switching
Size: 40mm × 4mm × 3mm
Applications
