Lithium Battery Charger Protection Module (BMS) 3S 20A 12.6V

Battery Charger Protection

The 3S 20A Lithium Battery Charger Protection Module (BMS) is engineered to protect and manage 3-cell lithium-ion battery packs. It supports batteries with nominal voltages of 3.6V or 3.7V, including 18650, 26650, and polymer lithium batteries.

This module ensures safe operation with features like overcharge, over-discharge, overcurrent, and short circuit protection, along with cell balancing to maintain equal charge across cells.

With a charging voltage of 12.6V and a continuous discharge current of up to 20A, it’s ideal for applications such as power tools, LED lights, and low-power inverters.

Features :

• Overcharge Protection: Prevents cells from exceeding safe voltage levels, enhancing battery lifespan.
• Over-discharge Protection: Stops discharge when cells drop too low, preventing damage.
• Over-current Protection: Limits current to protect against excessive loads.
• Short Circuit Protection: Disconnects the battery in case of a short circuit for safety.
• Cell Balancing: Ensures all cells charge evenly, improving efficiency and longevity.
• Auto Recovery: Resumes normal operation after a protection event is resolved.
• Low Quiescent Current: Minimizes power consumption when idle.

Specifications :

Applications :

• Power Tools: Drills, sprayers, and other tools requiring reliable power.
• LED Lighting Systems: Backup or primary power for efficient lighting.
• Low-Power Inverters: For small-scale power conversion needs.
• Consumer Electronics Battery Packs: Custom or replacement packs for devices.
• Solar Street Lights: Managing battery storage for nighttime operation.
• Monitoring Systems: Powering remote or standby monitoring equipment.
• Vacuum Cleaners: Battery management for cordless models.

Precautions and Usage Guidelines :

To ensure optimal performance and safety, consider the following:

• Proper Wiring: Connect terminals correctly: 0V (B-), 3.7V (B1), 7.4V (B2), 11.1V (B+). Incorrect wiring can damage the module.
• Initial Charging: Charge the battery pack after connection to activate the BMS.
• Battery Compatibility: Avoid mixing batteries with different capacities or charge states to prevent imbalance.
• Wire Sizing: Use wires of at least 2.5mm² for high-current applications to handle the load safely.
• Cooling Considerations: Reduce load current in poor cooling environments to prevent overheating.