4S 6A Li-ion Battery Management System (BMS) – Long PCB

Overview:
The 4S 6A Long PCB Li-ion BMS is a compact and slim battery management system designed for 4-series lithium-ion battery packs (4S). With a continuous discharge current of up to 6 amps, it offers reliable protection and passive cell balancing, making it ideal for low-power applications where space efficiency is critical.

Technical Specifications:

• Battery Type: Lithium-ion (Li-ion / NMC)

• Battery Configuration: 4S (4 cells in series)

• Nominal Voltage: 14.8V (3.7V × 4)

• Maximum Charge Voltage: 16.8V (4.2V per cell)

• Overcharge Protection Voltage: ~4.25V per cell

• Over-discharge Protection Voltage: ~2.8V per cell

• Continuous Discharge Current: 6A

• Overcurrent Protection: Typically triggers between 8A and 12A

• Short Circuit Protection: Yes, automatic recovery (model dependent)

• Cell Balancing: Passive balancing

• Balancing Current: 30–60 mA per cell

• Quiescent Current: <50 µA

• Form Factor: Long, narrow PCB layout – suitable for cylindrical cell packs

• Port Configuration: Common port or separate port (varies by model)

• Operating Temperature: -20°C to +60°C

Protection Features:

• Overcharge protection

• Over-discharge protection

• Overcurrent protection

• Short circuit protection

• Passive cell voltage balancing

Applications:

• DIY lithium-ion battery packs

• LED lighting systems

• Power banks and portable battery systems

• RC projects and robotics

• Compact energy storage systems

• Low-power e-mobility devices (e.g., scooters)