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The 5S 15A 18650 Li-ion Lithium Battery BMS board is a high-quality protection module designed to safeguard 18V and 21V battery packs from overcharging, over-discharging, and overcurrent damage. It enhances safety, efficiency, and battery lifespan, making it essential for both DIY and industrial lithium-ion applications.
Built with durable MOSFETs and precision circuits, the 5S 15A 18650 Li-ion Lithium Battery protection board offers automatic recovery, short-circuit protection, and low quiescent current. Its compact PCB design allows seamless integration into battery-powered projects like e-bikes, cordless tools, and energy storage packs.
Engineered for reliable performance, the 5S 15A 18650 Li-ion Lithium Battery module provides stable charging at up to 56 A, discharge handling of 15 A, and multiple safeguard layers. This ensures balanced performance across all cells while maintaining system stability under load.
For hobbyists and professionals alike, the 5S 15A 18650 Li-ion Lithium Battery protection board delivers dependable operation and long-lasting battery protection in a wide range of electronics projects.
🔧 Key Features
- Designed for 5-cell (5S) 18650 Li-ion packs, 18V/21V
- Supports up to 56 A charging and 15 A discharge
- Multi-layer safety: overcharge, over-discharge, and overcurrent protection
- Short-circuit protection with automatic reset
- Energy-efficient standby mode with ~30 μA current
- Durable, compact PCB with high-quality MOSFETs
📐 Technical Specifications
| Product Name | 5S 15A 18650 Li-ion Lithium Battery BMS Charger Protection Board |
| Cell Configuration | 5 Series (5S) 18650 Li-ion cells |
| Supported Voltage | 18V / 21V battery packs |
| Nominal Charge Voltage | 21 V |
| Charge Current | Up to 56 A peak |
| Continuous Discharge | 15 A rated |
| Overcurrent Protection | 50 / 55 / 60 A cutoff |
| Protection Delay | 20 / 25 / 30 ms |
| Overcharge Detection | 4.18–4.22 V per cell |
| Overcharge Recovery | 4.05–4.15 V per cell |
| Over-discharge Detection | 2.75–2.85 V per cell |
| Over-discharge Recovery | 2.90–3.20 V per cell |
| Quiescent Current | ~30 μA typical |
| Operating Temperature | -20°C to +70°C |
| PCB Dimensions | Approx. 60 × 20 mm |
| Efficiency | >95% under rated load |
| Board Weight | ~15 g |
| Protections | Overcharge, over-discharge, overcurrent, short-circuit, temperature |
📌 Applications
- DIY 18V/21V Li-ion battery packs
- E-bike and scooter battery safety systems
- Cordless tool and drill battery modules
- Portable energy storage projects
- Solar and backup power battery management
💡 Why Choose This Product?
The 5S 15A 18650 Li-ion Lithium Battery BMS board delivers multi-layer protection, high efficiency, and long-term reliability. It is built to handle demanding loads while ensuring stable battery operation and extended cycle life.
📦 Package Includes
- 1 × 5S 15A 18650 Li-ion Lithium Battery BMS Charger Protection Board
- 1 × Connector Cable
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