2S 3A Li-ion Lithium Battery 7.4v 8.4V 18650 Charger Protection Board
The 2S 3A Li-ion Battery Protection Board (BMS/PCM) for 7.4V 8.4V 18650 packs is a compact safety module designed to protect two-series lithium-ion battery cells. It provides essential protection functions such as overcharge, over-discharge, overcurrent, and short-circuit protection, ensuring safe and stable battery operation. Suitable for 2S (7.4V nominal, 8.4V fully charged) 18650 battery packs, it supports a continuous discharge current of up to 3A. This board is ideal for DIY battery packs, portable electronics, LED systems, and small power applications requiring reliable lithium battery management and safety protection.
تُعد لوحة حماية بطارية ليثيوم 2S بتيار 3A لبطاريات 18650 بجهد 7.4V إلى 8.4V وحدة أمان مدمجة مصممة لحماية خليتين ليثيوم موصولتين على التوالي. توفر الحماية من الشحن الزائد، والتفريغ الزائد، والتيار الزائد، وقصر الدائرة لضمان تشغيل آمن ومستقر للبطارية. تدعم حزم بطاريات 2S (7.4 فولت اسمي و8.4 فولت عند الشحن الكامل) بتيار تفريغ مستمر يصل إلى 3 أمبير. تُستخدم في مشاريع البطاريات المخصصة، والأجهزة المحمولة، وأنظمة الإضاءة، والتطبيقات الإلكترونية الصغيرة التي تحتاج إلى إدارة طاقة آمنة وموثوقة.
The 2S 3A Li-ion Lithium Battery Protection Board (BMS/PCM) is designed to manage and protect 2-cell series lithium-ion battery packs, commonly built using 18650 cells. It ensures safe operation by monitoring voltage and current levels during both charging and discharging processes.
This protection board prevents damage to battery cells by disconnecting the load or charger when unsafe conditions occur, such as overcharging, deep discharging, excessive current draw, or short circuits. It helps extend battery life and improves overall system reliability.
With a compact design and ultra-low standby current, this module is ideal for space-constrained applications. It is widely used in DIY battery packs, portable devices, LED lighting systems, and small electronic equipment requiring stable 2S lithium battery management.
Specifications
| Parameter | Specification |
|---|---|
| Product Type | Li-ion Battery Protection Board (BMS/PCM) |
| Battery Configuration | 2S (2 cells in series) |
| Nominal Voltage | 7.4V |
| Full Charge Voltage | 8.4V |
| Overcharge Protection Voltage | 4.25–4.35V ±0.05V (per cell) |
| Over-discharge Protection Voltage | 2.3–3.0V ±0.05V (per cell) |
| Max Continuous Current | 3A |
| Peak Current | 5A |
| Quiescent Current | < 3µA |
| Internal Resistance | < 45mΩ |
| Operating Temperature | -40°C to +50°C |
| Storage Temperature | -40°C to +80°C |
| Short Circuit Protection | Supported (Recoverable) |
| Cycle Life | > 50,000 hours |
| Board Size | 36 × 6 × 1.0 mm |
Applications
- DIY 2S lithium battery packs
- 18650 battery assemblies
- Portable electronic devices
- LED lighting systems
- Small DC motor applications
- Power banks and backup systems
- Arduino and embedded systems power supply
- Solar small-scale storage systems
- Wireless devices and sensors
- Robotics and small automation projects
- Battery-powered DIY projects
- Safety protection for lithium-ion systems