HX-3S-01 3S BMS 18650 Li-ion Battery Protection Board (12.6V)

HX-3S-01 — 3S Lithium Battery BMS Protection Board

The HX-3S-01 is a compact 3-series (3S) Battery Management System (BMS) designed for 18650 and similar lithium-ion battery packs. It provides essential protection against overcharge, over-discharge, and short circuits, making it a must-have for DIY 12.6V Li-ion battery packs used in power tools, e-bikes, portable power banks, and robotics projects.

Key Features

• 3S configuration — supports 3 cells in series (12.6V nominal)
• Overcharge protection per cell (cutoff ~4.25V)
• Over-discharge protection per cell (cutoff ~2.5V)
• Overcurrent & short circuit protection
• Balanced charge support via B1, B2 balance taps
• Compact slim form factor — fits inside battery enclosures
• Pads: B+, B1, B2, B−, P+, P− for easy wiring
• Dual MOSFET design for charge and discharge control

Typical Applications

• DIY 12.6V 18650 lithium battery packs
• Power tool battery replacement packs
• E-bike and scooter battery systems
• Portable power stations
• Robotics and RC battery packs

Model: HX-3S-01 | Configuration: 3S | Voltage: 12.6V | Compatible: 18650 Li-ion cells

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