SPIDER Automation | 1S 3MOS 3.7V 18650 Lithium-Ion Battery Protection Board | 6A Maximum Current
Product Overview
The SPIDER Automation 1S 3MOS Lithium-Ion Battery Protection Board is designed to provide essential electrical protection for single-cell rechargeable lithium-ion battery assemblies. It combines cell-voltage monitoring with MOSFET-based switching to control the battery’s charging and discharging paths.
The integrated protection circuit helps safeguard the connected cell against excessive charging, deep discharge, overcurrent and short-circuit conditions. Its compact PCB format makes it suitable for integration into custom 18650 battery packs and space-constrained electronic equipment.
Technical Features & Protection Architecture
- High-Accuracy Voltage Detection: Monitors battery voltage to identify conditions relevant to overcharge and over-discharge protection.
- Three-MOSFET Switching Circuit: Uses MOSFET devices to control battery charging and discharging.
- Overcharge Protection: Detects excessive cell voltage and activates the corresponding protective response.
- Over-Discharge Protection: Helps prevent the connected cell from being discharged beyond its defined voltage threshold.
- Three-Stage Overcurrent Detection: Incorporates separate detection stages for overcurrent conditions and load short circuits.
- Short-Circuit Protection: Provides protection against short-circuit conditions in the connected load circuit.
- Non-Balancing Circuit: Designed for a single-cell battery configuration and does not provide cell balancing.
Battery Configuration & Connection Details
This protection board is designed for a single-cell lithium-ion battery assembly. Multiple compatible cells may be connected in parallel to increase battery capacity, provided the cells have matching voltage characteristics and are assembled correctly. Parallel-connected cells remain a single series group and do not change the battery’s nominal voltage.
The board uses separate battery and protected output connection points:
- B+: Connects to the positive terminal of the battery.
- B-: Connects to the negative terminal of the battery.
- P+: Protected positive output connection for the external circuit.
- P-: Protected negative output connection for the external circuit.
Applications
The compact 1S protection board is suitable for compatible single-cell lithium-ion battery assemblies used in portable electronics and custom low-voltage DC equipment.
- DIY 18650 Battery Packs: Protection for custom-built single-cell lithium-ion battery assemblies.
- Portable Electronic Devices: Battery protection for compatible rechargeable electronic equipment.
- Power Bank Projects: Integration into suitable single-cell battery-powered power bank designs.
- Embedded Electronics: Protection for electronic modules powered by a compatible lithium-ion cell.
- Wireless Sensor Devices: Use in suitable rechargeable battery-powered sensing equipment.
- IoT Projects: Battery protection for compatible single-cell connected devices.
- Portable Instruments: Integration into handheld measurement and electronic instruments.
- LED Lighting Projects: Protection for suitable rechargeable single-cell LED equipment.
- Electronics Prototypes: Use in custom battery-powered development projects.
- Compact DC Equipment: Battery protection for compatible low-voltage electronic and electromechanical assemblies.
Package Contents
- 1 × 1S 18650 3.7V Lithium-Ion Battery Protection Board (3MOS)
Product Specifications
| Parameter | Specification |
|---|---|
| Product Type | Lithium-Ion Battery Protection Board (BMS) |
| Compatible Battery Chemistry | Lithium-Ion |
| Compatible Cell Format | 18650 |
| MOSFET Configuration | 3 MOSFETs |
| Cell Configuration | 1S (Single Cell) |
| Nominal Battery Voltage | 3.7V |
| Full-Charge Voltage | 4.2V |
| Maximum Sustained Current | 6A |
| Overcurrent Detection Current | 7.5A |
| Overcharge Detection Voltage | 4.25 ± 0.05V |
| Over-Discharge Detection Voltage | 2.45 ± 0.1V |
| Protection Functions | Overcharge, over-discharge, overcurrent and short-circuit protection |
| Protection Circuit | DW01 + 3 × 8205A MOSFET configuration |
| Cell Balancing | Not supported |
| PCB Length | 35mm |
| PCB Width | 7.4mm |
| PCB Thickness | 2.2mm |
Connection & Operating Recommendations
- Battery Compatibility: Use with a compatible single-cell lithium-ion battery assembly.
- Charger Selection: Use a dedicated single-cell lithium-ion charger with the correct charging profile.
- Terminal Connections: Connect B+ and B- to the battery, and use P+ and P- for the protected external circuit.
- Polarity: Verify terminal polarity before connecting the battery, charger or load.
- Load Selection: Keep the connected load within the board’s specified current capability.
- Electrical Insulation: Prevent exposed terminals and conductors from contacting each other or conductive enclosure surfaces.
