3S 40A 12.6V Enhanced Lithium Battery Protection Board BMS Module
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৳ 120.00৳ 150.00 (-20%)
This 3S 40A Enhanced Lithium Battery Protection Board (BMS) manages and protects three series-connected 3.7V lithium cells (like 18650, 21700, or Li-Po packs). Featuring an optimized “Enhanced” hardware layout with lower internal resistance MOSFETs, it safely delivers up to 40A of continuous discharge current while safeguarding your pack against overcharge, over-discharge, and high-load short circuits.
High-Current 3S 40A Enhanced Lithium Battery Protection Board (BMS)
Overview
This 3S 40A Enhanced Battery Management System (BMS) module is engineered to protect and manage a 3-cell series configuration of 3.7V lithium-ion or lithium-polymer batteries (such as 18650, 21700, or 26650 cells). Delivering a nominal voltage of 11.1V and a maximum full-charge voltage of 12.6V, this “Enhanced” edition features an optimized PCB layout with high-quality D472/BA1408 power MOSFETs to significantly lower internal resistance and increase current throughput efficiency for high-drain applications.
Enhanced Thermal and Power Efficiency
The Enhanced version focuses heavily on handling high power without overheating. By utilizing low-resistance switching components arranged in parallel rows, the board maximizes surface area for ambient heat dissipation. This architectural choice minimizes power loss through heat, ensuring steady voltage delivery even under intense electrical loads.
Comprehensive Multi-Tier Safeguards
The dedicated on-board control circuit monitors the individual state of each series connection point, stepping in instantly to disconnect the load or charger during hazardous conditions:
- Overcharge Protection: Disconnects the charging supply when cells reach full capacity to avoid thermal stress and cell damage.
- Over-Discharge Protection: Safely isolates the battery pack when voltage drops too low, preventing irreversible degradation.
- Short Circuit & Overcurrent Safety: Offers heavy-duty protection by cutting off the power track within milliseconds if an external short circuit or a current spike exceeding 40A is detected.
Technical Specifications
- Battery Configuration: 3S (3 Cells in Series)
- Compatible Battery Type: 3.7V Nominal Lithium Cells (4.2V fully charged)
- Version: Enhanced (Optimized current path, no cell balancing circuitry)
- Continuous Discharge Current: Up to 40A (ensure appropriate wire gauges and airflow)
- Continuous Charging Current: Up to 20A
- Charging Voltage Required: 12.6V – 13.0V DC
- Wiring Connection Nodes: 0V, 4.2V, 8.4V, and 12.6V
Applications
- High-drain cordless electric drills, drivers, and heavy motorized tools
- 12V portable DIY power stations, marine backups, and camping supply packs
- Power distribution and isolation boards for heavy RC vehicles and robotics
- High-power 12V LED lighting setups and portable field audio sound systems
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