5S 100A BMS Battery Management System Board for 18650 Li-ion (18V-21V)

5S 100A BMS – Battery Management System Board

A high-current 5S Battery Management System (BMS) board designed for 5-cell series Li-ion/LiPo battery packs (18V–21V nominal). Featuring 16x power MOSFETs and dual current sense resistors (R003), this BMS provides robust overcharge, over-discharge, overcurrent, and short circuit protection for demanding applications like e-bikes, power tools, and energy storage systems.

Key Features

• 5S configuration: supports 5 Li-ion cells in series (18V–21V)
• 100A continuous discharge current
• 16x power MOSFETs for high-current switching
• Dual R003 current sense resistors for accurate protection
• Balance pads: B+, B1, B2, B3, B4, B- for cell balancing
• Output pads: P+, P-, C- for load and charger connections
• Overcharge, over-discharge, overcurrent, and short circuit protection
• White PCB with compact SMD design

Specifications

• Configuration: 5S (5 cells in series)
• Nominal Voltage: 18V (fully charged: 21V)
• Continuous Current: 100A
• Cell Type: Li-ion / LiPo (3.7V per cell)
• Overcharge Protection: 4.25V ±0.05V per cell
• Over-discharge Protection: 2.5V ±0.1V per cell
• PCB Color: White

Applications

• E-bike and electric scooter battery packs
• Power tool battery systems
• DIY high-current battery packs
• Energy storage and UPS systems
• Robotics and heavy-load projects