LiFePO4 4S 30A Balanced BMS Battery Charging Protection Module for 12.8V Lithium Iron Phosphate Packs

The LiFePO4 4S 30A Balanced BMS Battery Charging Protection Module is a high-performance battery management system designed for 12.8V (4S) lithium iron phosphate (LiFePO4) battery packs. It ensures complete protection during charging, discharging, and power delivery, maintaining battery health and extending overall lifespan.

This module integrates multiple safety functions such as overcharge, over-discharge, overcurrent, and short-circuit protection, along with automatic cell voltage balancing. The 30A current rating makes it suitable for medium- to high-power applications such as solar battery systems, e-bikes, energy storage banks, and DIY power tools.

Built using high-quality MOSFETs and a precise voltage management IC, the module delivers reliable protection without significant power loss or heat buildup. It’s an essential component for anyone building a stable and safe LiFePO4-based energy storage system.

Key Features of LiFePO4 4S 30A Balanced BMS

1. Supports 4S LiFePO4 Configuration:
   Designed for 12.8V nominal voltage systems (4 cells in series).

2. Balanced Charging Function:
   Equalizes voltage between cells to prevent imbalance and extend battery life.

3. Overcharge and Over-Discharge Protection:
   Automatically stops charging or discharging to protect cells from voltage extremes.

4. High Current Capacity (30A):
   Suitable for systems with higher current demands like inverters and motors.

5. Short-Circuit and Overcurrent Protection:
   Instantly disconnects output when current exceeds safe limits.

6. Temperature Stability:
   Works reliably in a wide range of environmental conditions.

7. Durable and Compact PCB Design:
   Small, lightweight, and easy to integrate into any custom battery pack.

8. Energy Efficient:
   Uses low-resistance MOSFETs to minimize power loss during operation.

Technical Specifications

• Battery Type: LiFePO4 (Lithium Iron Phosphate)

• Configuration: 4S (4 cells in series)

• Nominal Voltage: 12.8V

• Charging Voltage: 14.6V

• Overcharge Detection Voltage: 3.65V ± 0.05V per cell

• Over-Discharge Detection Voltage: 2.0V ± 0.05V per cell

• Continuous Current: 30A

• Peak Current: 50A (short duration)

• Balancing Current: 50–80mA

• Operating Temperature: -20°C to +60°C

• Size: 58mm × 45mm × 5mm

• Weight: 10g (approx.)

Working Principle of LiFePO4 4S 30A BMS

The LiFePO4 4S 30A BMS monitors the voltage of each individual cell in the 4-cell battery pack. It ensures that each cell remains within its safe operating range.

• When the voltage of any cell exceeds 3.65V, the BMS stops charging to prevent overcharging.

• If a cell drops below 2.0V, it halts discharge to avoid deep discharge damage.

• During charging, the balancing circuit ensures all cells reach equal voltage levels by bypassing extra current from higher-voltage cells.

This automatic regulation system keeps the battery pack healthy, balanced, and safe throughout its charge and discharge cycles.

Applications of LiFePO4 4S 30A BMS

1. Solar Power Systems:
   Ideal for 12V off-grid solar energy storage solutions.

2. Electric Vehicles (EVs):
   Suitable for small e-bikes, scooters, and mobility devices.

3. DIY Battery Packs:
   Perfect for building 12.8V custom LiFePO4 batteries.

4. Power Backup Units:
   Ensures safety in UPS, inverter, and emergency lighting systems.

5. Robotics & IoT Devices:
   Powers robotics systems that require high current and reliability.

6. Portable Power Stations:
   Used in camping and field power systems for clean, stable energy.

Advantages of Using LiFePO4 BMS

• Enhanced Battery Safety:
  Protects cells from voltage imbalance and short-circuit conditions.

• Longer Battery Lifespan:
  Maintains cell voltage balance, reducing stress on individual cells.

• High Efficiency:
  Reduces heat and energy loss during operation.

• Maintenance-Free Operation:
  Fully automatic protection and balancing system.

• Stable Output:
  Provides steady and safe power for sensitive electronics.

Installation and Wiring Guide

Pin Connections:

• B+ → Positive terminal of battery pack

• B- → Negative terminal of battery pack

• B1, B2, B3: Intermediate connections between cells

• P+ / P- → Power output/charging terminals

Installation Steps:

1. Connect the cells in series to create a 4S (12.8V) battery pack.

2. Attach the BMS terminals to the corresponding battery points.

3. Double-check all connections before applying power.

4. Mount the board securely and ensure proper ventilation.

⚠️ Note: This BMS is compatible only with LiFePO4 cells, not Li-ion or LiPo batteries.

Why Buy LiFePO4 4S 30A BMS from Electroxbd

At Electroxbd, we provide authentic and high-quality LiFePO4 protection modules tested for performance, durability, and safety. Whether you’re building a small DIY energy project or a professional battery system, we ensure you receive the best value and reliability.

Why Choose Electroxbd:

• 100% genuine and performance-tested products

• Affordable pricing for makers and professionals

• Fast delivery across all Bangladesh districts

• Expert advice for battery management and integration

• Trusted by engineers, students, and DIY enthusiasts

Office Address:
H#1/1, In Opposite of RH Chhatrabash, Madrasa More, Debisingpara, Boalia, Rajshahi, Bangladesh

At Electroxbd – Trusted Source for Reliable Electronic Parts, you’ll find the best battery management solutions like the LiFePO4 4S 30A Balanced BMS Module, ensuring power, safety, and efficiency for every project.

Common Questions:

Q: What is the price of LiFePO4 4S 30A Balanced BMS Battery Charging in Bangladesh?

A: The latest price of LiFePO4 4S 30A Balanced BMS Battery Charging in Bangladesh is 350 BDT.

Q: Where to buy  LiFePO4 4S 30A Balanced BMS Battery Charging in Bangladesh?

A: You can buy the LiFePO4 4S 30A Balanced BMS Battery Charging at the best price from ElectroXBD in Bangladesh.