3S 20A BMS Lithium-Ion Battery Protection Board (High-Current 11.1V/12.6V)

Overview: Extreme Current Protection and Balance for 11.1V Packs. The 3S 20A BMS (Battery Management System) is a mandatory, high-power component for safely managing three 3.7V Li-ion cells connected in series (3S), yielding a 11.1V nominal output (12.6V fully charged). This BMS ensures the safety and longevity of your battery pack by providing comprehensive protection and handling a robust 20 AMPERES (20A) of continuous discharge current. This high capacity is essential for applications requiring powerful burst current, such as electric drills and motor starts. Crucially, it includes a BALANCE CHARGING function to extend the pack's overall lifespan. Projectile Electronics guarantees this high-quality board for your serious power projects.

Key Technical Features: High Capacity and Reliability. Battery Configuration: 3S (Three Cells in Series) for 11.1V nominal Li-ion packs. Max Continuous Discharge Current: 20 AMPERES (20A) (Suitable for high-power tools and motors). Max Charge Current: Typically 10A-20A (depending on cooling). Full Charge Voltage: 12.6V DC. Key Functions: BALANCE CHARGING (ensures cell voltages are equal), Overcharge Protection (typically 4.25V per cell), Over-Discharge Protection (typically 2.7V per cell), and Short-Circuit Protection. Integrated: Often uses low resistance MOS tubes for efficient current flow.

Applications: High-Power Motor Systems. This BMS is expertly suited for: Powering ELECTRIC DRILLS AND POWER TOOLS, creating high-current DIY POWER BANKS and portable power stations, running LARGE DC MOTORS and high-power drivers, and integrating safety into solar energy storage solutions.

Safety Warning and Usage Notes (CRITICAL). This high-current BMS is ABSOLUTELY NECESSARY for 3S packs used in demanding applications. Ensure your cells are matched (similar capacity and internal resistance) and initially charged to the SAME VOLTAGE LEVEL for effective balancing. You MUST use the specified 12.6V charge voltage. Due to the high current, USE THICK, HIGH-GAUGE WIRING for all battery and load connections.

Projectile Electronics Quality and Trust. We supply high-current BMS boards with robust protection circuitry, guaranteeing the ABSOLUTE SAFETY AND LONGEVITY of your high-power 3S Li-ion battery pack.

Package Includes: 1 × 3S 20A BMS Lithium-Ion Battery Protection Board.