12V LiFePO4 Battery Protection Board 3S/4S 100A BMS UPS Lithium Iron Phosphate Charge Discharge Protection Module With Balance Function

12V LiFePO4 Protection Board UPS Protection Board

📌 Product Overview The NBQ01 12V LiFePO4 protection board is a high-current BMS (Battery Management System) module designed for 12V battery packs. It is available in two versions: 3-series ternary lithium (12.6V charging) and 4-series LiFePO4 (14.6V charging), both supporting 100A continuous discharge current with separate charge and discharge ports. The board integrates passive cell balancing function and comprehensive safety protections including overcharge, over-discharge, over-current and short-circuit protection. It adopts aluminum heat sink design for excellent heat dissipation, with main circuit conduction resistance less than 25mR and ultra-low static power consumption below 50uA. Compact size of 87×36×8mm and net weight 43.8g, widely used in electric vehicles, tricycles, low-speed vehicles, energy storage systems, solar inverters and high-power UPS equipment. ✨ Core Features

1. Two versions optional: 3S ternary lithium (12.6V) and 4S LiFePO4 (14.6V), both rated 100A continuous discharge.
2. Separate charge and discharge port design, convenient for battery pack wiring and system integration.
3. Built-in passive cell balancing with 30±5mA balancing current for consistent cell voltage.
4. Comprehensive protection: overcharge, over-discharge, over-current (200±30A threshold) and short-circuit protection (250uS response).
5. Aluminum heat sink for efficient heat dissipation, main circuit conduction resistance <25mR.
6. Ultra-low self-consumption <50uA, minimizing battery static power loss.
7. Compact PCB design with mounting holes, pre-soldered balance wires and connector for easy installation.
8. Over-discharge protection release at 2.3±0.1V (LiFePO4) / 3.0±0.1V (ternary), automatic recovery after load disconnection.

📋 Product Parameters

Item	Specification
Product Model	NBQ01
Version	3S Ternary 12V / 4S LiFePO4 12V
Discharge Current	100A continuous
Over-current Protection	200±30A, 9mS detection delay
Main Circuit Resistance	<25mR
Charging Voltage	Ternary: 12.6V / LiFePO4: 14.6V
Overcharge Protection	LiFePO4: 3.75±0.025V / Ternary: 4.28±0.05V
Over-discharge Protection	LiFePO4: 2.1±0.1V / Ternary: 2.55±0.1V
Balancing Current	30±5mA
Short-circuit Protection	250uS response, auto recovery after load disconnect
Self-consumption	<50uA
Operating Temperature	-30℃ ~ +80℃

📐 Dimension Info

• Module size: 87 × 36 × 8mm
• Net weight: 43.8g

⚠ Important Notes

1. Please select the correct version (3S ternary / 4S LiFePO4) matching your battery cells before wiring.
2. Strictly follow the wiring diagram; incorrect wiring will cause permanent damage to the protection board.
3. The product has short-circuit protection, but repeated short-circuit testing is not recommended.
4. This board is only suitable for lithium battery packs; do not connect other types of batteries.
5. If there are version differences or images not updated, please refer to the actual product.

🛠 Application Scenarios Electric vehicles, tricycles, low-speed vehicles, energy storage systems, electric cars, solar inverters, high-power UPS equipment, portable power stations.