3S, 4S, 5S 100A 12V / 16.8V / 21V Li-ion Lithium Battery Protection Board (BMS) with Balance – High Current Power BMS in Pakistan

Overview

When building high-power custom lithium battery packs for electric scooters, cordless power tools, high-drain portable inverters, or mobile robotics, standard protection circuits will instantly trip under heavy motor loads. The 3S / 4S / 5S 100A Li-ion Battery Management System (BMS) Board is engineered to handle massive discharge currents safely. Featuring integrated cell balancing, short-circuit protection, over-charge, and over-discharge safeguards, this robust BMS ensures your multi-cell lithium arrays operate reliably and securely under demanding workshop conditions.

Key Features

• High-Current 100A Output: Designed to handle heavy surge currents required by DC motors, power tools, and inverters without dropping offline.

• Versatile Multi-Series Support: Configurable wiring layout supports 3-Series (12V), 4-Series (16.8V), and 5-Series (21V) lithium-ion battery pack builds.

• Onboard Cell Balancing: Automatically equalizes voltage across individual cell groups to maximize pack lifespan and overall capacity.

• Comprehensive Protection Suite: Guards against over-charging, over-discharging, over-current, and short-circuits to ensure total pack safety.

Technical Specifications

Common Applications

• Cordless Power Tool Battery Rebuilds: High-amp BMS upgrade for heavy-duty drills, saws, and impact wrenches.

• Electric Scooters & E-Bikes: Essential safety and management controller for mid-range traction battery packs.

• Portable Power Stations & Inverters: Reliable power distribution and cell protection for custom off-grid energy boxes.

• Note to customers: Strictly follow the wiring diagram sequence (B-, B1, B2, B3, B4, B+) starting from the negative terminal when soldering your balance leads to prevent board damage!