5S 18.5V 15A Li-Ion Lithium Battery Protection Board

5S 18.5V 15A Li-Ion Lithium Battery Protection Board is a BMS (Battery Management System) designed to protect and manage 5-cell lithium-ion battery packs. It ensures safe charging, discharging, and cell balancing, making it ideal for custom 5S battery packs used in DIY projects, e-bikes, power tools, and energy storage systems.

Key Features:

• Overcharge Protection: Automatically disconnects charging once cell voltage exceeds safe limits.
• Over-discharge Protection: Prevents deep discharge to extend battery life.
• Short Circuit Protection: Instant shutdown in case of output short-circuit conditions.
• Overcurrent Protection: Stops discharging when output exceeds 15A.
• Cell Balancing: Passive balancing maintains equal voltage across all 5 cells.

Technical Specifications:

• Battery Type: 5-cell (5S) Li-ion or Li-Po
• Rated Voltage: 18.5V (5 × 3.7V)
• Max Charging Voltage: 21V (4.2V × 5)
• Continuous Discharge Current: 15A
• Instantaneous Current: Up to 30A
• Overcharge Protection Voltage: 4.25V ±0.05V per cell
• Over-discharge Protection Voltage: 2.7V ±0.1V per cell
• Overcurrent Protection: ~60A peak (instant cut-off)

Mechanical Specifications:

• Board Dimensions: Approx. 55mm × 45mm × 3mm
• Mounting Holes: 4 holes for secure fitting to enclosures or pack
• PCB Type: High-quality FR4, double-sided, with thick copper traces

Wiring and Pinout:

• B+ and B-: Connect to battery pack terminals
• P+ and P-: Connect to charge/discharge terminals
• B1 to B4: Connect to respective cell taps between batteries
• Cell Sequence: Maintain correct order: B1-B2-B3-B4-B5-B-

Datasheet and Documentation:

• Search “5S 15A Li-Ion BMS Protection Board PDF datasheet” for technical reference

Applications:

• DIY Lithium Battery Packs: Ideal for e-bikes, scooters, RC devices
• Solar Energy Systems: Protects Li-ion battery banks from overcharging/discharging
• Power Tools: Safely manage high-drain 5-cell packs
• Inverter Backup Systems: Improves battery longevity in UPS setups

Equivalent Models:

• HX-5S-A01: Widely used 5S 15A BMS module with similar layout
• DW01 + 8205S Based Boards: Common protection IC combo for compact applications
• 5S 20A BMS: Higher current variant with similar pinout

Package Includes:

• 1 x 5S 18.5V 15A Li-Ion Battery Protection Board