4S 12V 100A LiFePO4 BMS 3.2V Battery Protection Circuit Board

Description

This is a 4S LiFePO4 Battery Management System (BMS), designed to protect a 4-cell series (4S) LiFePO4 battery pack — built from 3.2V nominal cells for a total pack voltage of 12V (nominal). Rated for up to 100A continuous discharge current, this BMS is well suited for higher-power applications such as solar energy storage, e-bikes, golf carts, off-grid power systems, and other demanding 12V LiFePO4 battery pack builds.

The board provides essential protection functions to keep your battery pack safe and long-lasting, including overcharge protection, over-discharge protection, overcurrent protection, and short-circuit protection. Its aluminum heatsink casing helps dissipate heat generated during high-current charge/discharge cycles, improving reliability and thermal performance under sustained heavy loads.

Pre-attached red (P+) and black (P-) discharge leads, along with balance/sense wires, make wiring into your battery pack straightforward, while the compact rectangular form factor allows for easy mounting inside battery enclosures or packs.

Key Features

• Configuration: 4S (4 cells in series)
• Nominal Voltage: 12V (3.2V x 4 LiFePO4 cells)
• Max Continuous Current: 100A
• Battery Chemistry: LiFePO4 (LFP)
• Overcharge / over-discharge / overcurrent / short-circuit protection
• Aluminum heatsink casing for improved thermal performance
• Pre-wired output leads for easy pack integration

Common Applications

• 12V LiFePO4 battery pack protection (solar, e-bike, golf cart, RV/marine)
• Off-grid and backup power storage systems
• High-current DIY battery pack builds
• Electric bike and scooter battery packs

Package Includes

• 1 x 4S 12V 100A LiFePO4 BMS Protection Board