4S 10A Li-ion BMS – SWPCB

Overview:
The 4S 10A SWPCB Li-ion BMS is a compact battery management system designed for lithium-ion battery packs configured in 4 cells in series (4S). It supports up to 10 amps continuous discharge current and provides essential protections including overcharge, over-discharge, overcurrent, short circuit protection, and passive cell balancing.

Technical Specifications:

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

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

• Nominal Voltage: 14.8V (3.7V × 4)

• Maximum Charge Voltage: 16.8V (4.2V × 4)

• Overcharge Protection: ~4.25V per cell

• Over-discharge Protection: ~2.8V per cell

• Continuous Discharge Current: 10A

• Overcurrent Protection: Typically 15A to 20A

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

• Cell Balancing: Passive balancing

• Balancing Current: 30–60 mA per cell

• Quiescent Current: Less than 50 µA

• PCB Type: SWPCB (Standard-width PCB design)

• Port Type: Common port (shared charge/discharge) or separate port (varies by version)

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

Protection Features:

• Overcharge protection

• Over-discharge protection

• Overcurrent protection

• Short circuit protection

• Passive cell voltage balancing

• Optional temperature sensing (available on select models)

Applications:

• 4S lithium-ion battery packs

• LED lighting systems

• Portable battery packs and DIY power banks

• RC and robotics projects

• Small e-mobility systems (low-power e-bikes, scooters)

• Solar or backup power storage