Description
Buy the high-quality 4S 40A 14.8V 18650 Lithium Battery BMS PCB Protection Board at the best price in Bangladesh. At HTE Bangladesh, we bring you the Original 4S 40A BMS, a crucial component for anyone building reliable and safe 4-cell (4S) lithium-ion battery packs. This Balance Version BMS ensures optimal performance and extended lifespan for your 18650 or similar Li-ion cells, safeguarding them from common charging and discharging issues. Say goodbye to uneven cell degradation and hello to maximum battery efficiency!
🔥 Features & Benefits
- Advanced Cell Balancing: Automatically balances individual cell voltages during charging, maximizing battery pack capacity and extending overall lifespan.
- Robust Multi-Protection: Guards against overcharge (OV), over-discharge (UV), over-current (OC), and short-circuit (SC) conditions, ensuring both battery and user safety.
- High Current Handling: Capable of managing a continuous discharge current of up to 40A, making it suitable for a wide range of high-power applications.
- Wide Application: Ideal for 14.8V (nominal) / 16.8V (full charge) 4S Li-ion battery packs, perfect for DIY power tools, e-bikes, robotics, and portable energy storage solutions.
- Durable & Compact Design: Features a robust and compact PCB design for easy, space-efficient integration into your battery projects.
- নির্ভরযোগ্য পারফরম্যান্স: আপনার মূল্যবান লিথিয়াম ব্যাটারি প্যাকের জন্য সেরা সুরক্ষা এবং দীর্ঘস্থায়ী পারফরম্যান্স প্রদান করে। (Reliable Performance: Provides the best protection and long-lasting performance for your valuable lithium battery pack.)
⚡ Technical Specifications
| Parameter | Value |
|---|---|
| Model | HW-391 (4S 40A Balance Version) |
| Charging Voltage | DC 16.8V |
| Continuous Discharge Current | 40A (max) |
| Instantaneous Discharge Current | 80A (max) |
| Overcharge Detection Voltage | 4.25 ± 0.025V per cell |
| Overcharge Release Voltage | 4.15 ± 0.05V per cell |
| Over-discharge Detection Voltage | 2.7 ± 0.08V per cell |
| Over-discharge Release Voltage | 3.0 ± 0.1V per cell |
| Balance Detection Voltage | 4.2V ± 0.025V |
| Balance Current | 45 ± 5 mA |
| Short Circuit Protection | Yes (Self-recovery) |
| Operating Temperature | -40°C to +85°C |
| Material | High-Quality PCB |
| Dimensions (Approx.) | 55mm x 45mm x 3.4mm |
📦 Additional Info
- Weight: Approx. 10g – 12g
- Dimensions: 55mm x 45mm x 3.4mm
- Package Includes: 1x Original 4S 40A 14.8V Lithium Battery BMS PCB Protection Board – Balance Version
🎯 Application Areas
This versatile 4S 40A BMS Board is ideal for:
- DIY 18650 lithium-ion battery packs
- Electric Bicycles and Scooters
- Power Tools (e.g., cordless drills, garden tools)
- RC Hobbies (Drones, Robots, RC Cars)
- Portable Power Stations and Emergency Backup Power
- Solar Energy Storage Systems
- General electronics projects requiring reliable 4S Li-ion battery management
✅ Call to Action
Don’t compromise on battery safety and lifespan for your valuable projects. Order your Original 4S 40A 14.8V Lithium Battery BMS PCB Protection Board – Balance Version today from HTEBD and ensure peak performance and robust protection for your battery packs! Get the best 4S 40A BMS price in Bangladesh now. Limited stock available.
❓ Frequently Asked Questions (FAQ)
Q1: What is a 4S 40A BMS, and why is the balance version important?
A: A 4S 40A BMS (Battery Management System) is a crucial circuit board designed to protect a 4-cell series (14.8V nominal) lithium-ion battery pack, capable of handling up to 40 amps of continuous current. The “Balance Version” actively balances the voltage of each individual cell during charging. This prevents overcharging of stronger cells while weaker ones catch up, ultimately preventing uneven cell degradation and ensuring a longer, healthier lifespan for your entire battery pack.
Q2: Can this 4S 40A BMS be used with any 18650 battery?
A: Yes, this BMS is compatible with standard 3.7V (nominal) 18650 Li-ion cells, as well as other compatible lithium cobalt oxide (LiCoO2) and lithium manganese oxide (LiMn2O4) batteries. It’s important to ensure your chosen cells are capable of handling the discharge current your specific application requires (up to 40A continuous for this BMS).
Q3: What is the maximum voltage this BMS can handle, and what protections does it offer?
A: This 4S BMS is designed for a maximum charging voltage of 16.8V (4.2V per cell when fully charged). It offers comprehensive protection against overcharging (detects at 4.25V per cell), over-discharging (detects at 2.7V per cell), over-current, and short circuits, providing peace of mind for your battery setup.
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