Description
Description
The 4S 40A 16.8V Li-Ion Battery Protection Board (BMS) is designed to provide reliable protection and management for 4-cell lithium-ion battery packs built with 18650 cells. It enhances battery safety by monitoring charging and discharging conditions while protecting against overcharge, over-discharge, overcurrent, and short-circuit events. With support for up to 40A continuous discharge current and 20A charging current, this BMS is suitable for high-power battery packs used in electric mobility, energy storage systems, power tools, robotics, and DIY battery projects. Its compact design allows easy integration into custom battery pack assemblies.
Features
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Designed for 4S lithium-ion battery packs
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Compatible with 18650 lithium-ion cells
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Supports 16.8V battery charging systems
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Continuous discharge current up to 40A
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Continuous charge current up to 20A
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Overcharge protection function
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Over-discharge protection function
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Overcurrent protection function
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Short-circuit protection function
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Compact PCB design for battery integration
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Suitable for high-power battery applications
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Reliable battery monitoring and management
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Improves battery pack safety and lifespan
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Ideal for DIY and commercial battery packs
Specifications
- Model: 4 String 16.8V Lithium Battery Protection Board
- Battery Type: Lithium-Ion (18650)
- Battery Configuration: 4S
- Nominal Battery Voltage: 14.8V
- Maximum Charging Voltage: 16.8V
- Charging Voltage Range: 16.8V 18.1V
- Maximum Continuous Charge Current: 20A
- Maximum Continuous Discharge Current: 40A
- Protection Functions: Overcharge, Over-Discharge, Overcurrent, Short Circuit
- Board Dimensions: 45 55 3.4mm
- Application: Battery Pack Protection and Management
- Installation Type: Integrated Battery Pack PCB
- Compatible Cells: 18650 Lithium-Ion Cells
- Usage: Rechargeable Battery Packs
Links
- 4S 40A 16.8V Li-Ion Battery Protection Board Manual
Tutorials
- How to Safely Connect a 4S Li-Ion 40A BMS (14.4V-16.8V) for Optimal Battery Protection
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