6S 22.2V 25.2V 12A 18650 Lithium Battery BMS Protection Board

6S 22.2V 25.2V 12A 18650 Lithium Battery BMS Protection Board is a 6-series (6S 22.2V nominal / 25.2V full charge) Battery Management System (BMS) module designed to protect 6-cell 18650, 21700, and LiPo lithium-ion battery packs. Providing 12A continuous discharge current (15A–18A instantaneous surge) with individual voltage sensing across all six series cell groups (`B1`–`B5`), it protects 24V-class robotics, e-bikes, solar storage banks, and portable industrial tools against overcharge, over-discharge, overcurrent, and short-circuit faults.

Key Features:

• 6-Series (22.2V / 25.2V) Full-Pack Supervision: Monitors all 6 series cells (`6 × 3.7V = 22.2V` nominal, `6 × 4.2V = 25.2V` full charge) to prevent any single cell from exceeding 4.25V or dropping below 2.70V.
• 12A Continuous / 15A–18A Peak Discharge Rating: Handles up to 12A continuous current (~280W at 24V) with low conduction loss across its parallel MOSFET stage.
• Automatic Short-Circuit & Overcurrent Recovery: Cuts off output instantly when load current exceeds ~15A–18A or during a short circuit, and resets automatically once the fault is cleared.
• Ideal 24V Lead-Acid Replacement Voltage: A 6S (22.2V–25.2V) or 7S Li-ion pack is the standard lightweight lithium replacement for heavy 24V (2 × 12V) lead-acid battery systems.
• Clearly Labeled Solder Pads: Features large tinned pads (`B-`, `B1`, `B2`, `B3`, `B4`, `B5`, `B+`, `P+`, `P-`) on a compact 56mm × 45mm FR-4 board.

Technical Specifications:

• Supported Battery Configuration: 6S (6 Series 3.7V Li-ion / 18650 / 21700 / LiPo Cells — 22.2V Nominal)
• Charging Voltage: 25.2V DC CC/CV (4.20V × 6)
• Continuous Discharge Current: 12A Max
• Instantaneous / Overcurrent Trip Current: 15A to 18A
• Overcharge Detection Voltage: 4.25V ± 0.05V per cell (Release: 4.15V ± 0.05V)
• Over-Discharge Detection Voltage: 2.70V ± 0.10V per cell (Release: 3.00V ± 0.10V)
• Quiescent Current: < 30 µA
• Operating Temperature Range: -40°C to +85°C

Mechanical Specifications:

• PCB Material: FR-4 Double-Sided Green Fiberglass PCB (~1.2mm Thickness)
• Terminals: 9 × Tinned Solder Pads (`B-`, `B1`, `B2`, `B3`, `B4`, `B5`, `B+`, `P+`, `P-`)

Dimensions:

• Length: ~56 mm
• Width: ~45 mm
• Thickness: ~3.5 mm
• Weight: ~12 g

Pinout and Wiring:

• B- (0V): Connect to Cell 1 Negative (Pack Negative).
• B1 (3.7V): Connect between Cell 1+ and Cell 2-.
• B2 (7.4V): Connect between Cell 2+ and Cell 3-.
• B3 (11.1V): Connect between Cell 3+ and Cell 4-.
• B4 (14.8V): Connect between Cell 4+ and Cell 5-.
• B5 (18.5V): Connect between Cell 5+ and Cell 6-.
• B+ (22.2V/25.2V): Connect to Cell 6 Positive (Pack Positive).
• P+ & P-: Connect to 24V load and 25.2V CC/CV charger.

Datasheet Reference:

• Protection Architecture: 6S Multi-Cell Li-Ion Supervisor IC + Low-$R_R_DS(on) Power MOSFET Array

Commonly Used in:

• 24V E-Scooter, Kid Ride-On, and Lightweight E-Bike Packs
• 6S (22.2V) Autonomous Mobile Robots, AGVs, and Heavy Drones
• 24V Solar Street Lights, PLC Backup UPS, and Industrial Actuators
• 24V Portable Audio PA Systems and Cordless Tools

Applications:

• Assembles a lightweight 6S1P, 6S2P, or 6S3P 18650 lithium battery pack to power 24V DC motors, linear actuators, and 24V stepper/servo drives.
• Protects 6S LiPo drone/rover batteries that lack built-in BMS discharge protection when repurposed for ground robotics.
• Pairs with a `6S 4.2V Li-ion Balancer Board` (`PID 3362`) for passive 66mA cell equalization during charging.

Equivalent Models:

• 7S 25A 10 MOS BMS Lithium 18650 Battery Charge Board: 7-series (25.9V/29.4V) 25A BMS board.
• 5S 18.5V 21V 15A Li-ion Lithium Battery BMS Protection Board: 5-series (18.5V/21.0V) 15A BMS board.

Package Includes:

• 1 × 6S 22.2V 25.2V 12A 18650 Lithium Battery BMS Protection Board