4S 100A LiFePO4 BMS with Active Balancer Price in Bangladesh

The 4S 100A LiFePO4 BMS with Active Balancer is a battery management and protection board designed for 4S lithium iron phosphate (LiFePO4) battery packs. It combines battery protection functions with active cell balancing, making it suitable for applications where maintaining better voltage balance between series-connected cell groups is important.

A 4S LiFePO4 battery pack consists of four cells or cell groups connected in series. This configuration produces a nominal pack voltage of approximately 12.8V, while the fully charged voltage is typically around 14.6V when using standard LiFePO4 charging specifications.

As cells are connected in series, small differences in capacity, internal resistance, age, temperature, and state of charge can cause their voltages to become different during charging and discharging. The active balancing section of this type of BMS is designed to help redistribute energy between cell groups rather than simply dissipating excess energy as heat.

The advertised 100A rating places this BMS in a high-current category. However, the actual continuous current capability depends on the specific PCB design, MOSFETs, thermal conditions, wiring, connectors, and installation. The 100A figure should therefore be treated as the manufacturer’s advertised rating rather than a universal guarantee of continuous 100A operation.

What is Active Cell Balancing?

Active cell balancing is a battery-management technique that transfers energy between cells or series-connected cell groups to reduce voltage differences.

In a series battery pack, one cell may reach a higher voltage than the others during charging. A passive balancing system normally removes excess energy from the higher-voltage cell as heat. An active balancer instead transfers a portion of energy from a higher-energy cell toward lower-energy cells.

This can help improve voltage consistency across the battery pack and make better use of the available cell capacity.

Active balancing is particularly useful in multi-cell battery systems where maintaining cell-to-cell voltage balance is important. The exact balancing current and operating threshold depend on the particular BMS design and should be verified from the product specification.

Key Features

• Designed specifically for 4S LiFePO4 battery packs
• Suitable for approximately 12.8V nominal battery systems
• Advertised current rating up to 100A
• Integrated active cell balancing
• Helps reduce voltage differences between series cells
• Provides battery protection functions
• Suitable for high-current battery-pack applications
• Designed for lithium iron phosphate chemistry
• Useful for DIY and custom battery packs
• Suitable for energy-storage and backup-power projects

Technical Specifications

Exact protection thresholds, balancing current, balancing activation voltage, dimensions, terminal configuration, and continuous-current capability may vary by board version. Verify the specifications of the actual product before assembly.

Working Principle

The BMS monitors the individual cell groups within the 4S LiFePO4 battery pack. Because the cells are connected in series, each cell group can experience slightly different voltage and state-of-charge conditions.

During battery operation, the BMS monitors these conditions and provides protection against specified abnormal operating states. Depending on the exact board design, protection may include overcharge, over-discharge, overcurrent, and short-circuit protection.

The active balancing section works alongside the protection circuitry. When a voltage difference develops between the series-connected cells and the balancing conditions are met, the active balancing circuit transfers energy from a relatively higher-voltage cell group toward a lower-voltage cell group.

This differs from conventional passive balancing, where excess energy is typically converted into heat through a resistor.

By helping maintain better voltage balance, active balancing can support more consistent operation of a properly matched battery pack. However, balancing cannot correct severely mismatched, damaged, or unsuitable cells.

Applications

The 4S 100A LiFePO4 BMS with Active Balancer can be used in suitable applications such as:

• 12.8V LiFePO4 battery packs
• Solar energy storage systems
• Backup power systems
• Portable power stations
• DIY battery-pack projects
• Custom LiFePO4 battery assemblies
• DC energy-storage systems
• Robotics and electronics projects
• Recreational power systems
• Low-voltage energy-storage applications
• Battery research and educational projects

Advantages

The combination of battery protection and active balancing makes this type of BMS useful for 4S LiFePO4 battery systems where cell voltage consistency is important.

Active balancing can transfer energy between cells rather than simply dissipating excess energy as heat. This can be beneficial in battery packs where cell differences need to be managed during operation.

The 4S configuration also provides a convenient solution for building approximately 12.8V LiFePO4 battery packs, while the advertised 100A rating makes it suitable for appropriately designed higher-current systems.

Limitations

The 100A rating should not be interpreted as a guaranteed continuous operating current under every condition. Thermal performance, PCB construction, MOSFET selection, wiring, connectors, enclosure, and ambient temperature can all affect actual current capability.

Active balancing also does not make unmatched or damaged cells suitable for use. Battery cells should be properly selected and matched before assembling a pack.

The BMS is designed for LiFePO4 chemistry and should not be assumed to work with conventional lithium-ion, LiPo, or other chemistries unless the manufacturer specifically confirms compatibility.

A BMS also does not replace a suitable LiFePO4 charger, fuse, correctly rated wiring, or appropriate battery-pack construction practices.

Installation / Usage Tips

Use four compatible LiFePO4 cells or cell groups arranged in a 4S configuration. Cells should be appropriately matched and in good condition before assembly.

Follow the exact connection diagram supplied with the BMS. The individual cell-sense connections must be connected correctly because incorrect wiring can damage the BMS and create unsafe battery conditions.

Use a charger specifically designed for a 4S LiFePO4 battery pack. The charging voltage and current should match the specifications of the cells and battery pack.

For high-current applications, use appropriately rated cables, connectors, insulation, and additional circuit protection such as a suitable fuse where required.

Allow adequate thermal management and avoid exceeding the BMS manufacturer’s specified electrical and temperature limits.

Battery-pack construction should be performed using appropriate safety procedures, particularly when working with high-capacity cells capable of delivering high fault currents.

Why Choose a 4S 100A LiFePO4 BMS with Active Balancer?

This BMS combines several important battery-management functions into one board: cell monitoring, protection, and active balancing.

For a 4S LiFePO4 battery system, the active balancing function can help manage differences between series-connected cells, while the protection circuitry provides an additional layer of control against specified abnormal electrical conditions.

It is therefore a practical option for properly designed 12.8V-class LiFePO4 battery packs used in energy storage, backup power, electronics, and custom battery projects.

Why Buy from ElectroXBD?

ElectroXBD supplies electronic components, battery-related products, Arduino boards, sensors, modules, robotics parts, and other electronics products for students, hobbyists, engineers, project builders, and institutions across Bangladesh.

The 4S 100A LiFePO4 BMS with Active Balancer is suitable for customers building properly designed 4-cell-series LiFePO4 battery packs requiring both battery protection and active cell balancing.

ElectroXBD
Trusted Source for Reliable Electronic Parts

Address: H#1/1, Opposite of RH Chhatrabash, Vodra-Talaimari Road, Rajshahi
WhatsApp/Phone: 01600334238
Website: electroxbd.com

Frequently Asked Questions (FAQ)

1. What is a 4S 100A LiFePO4 BMS with active balancer?

It is a battery management and protection board designed for four LiFePO4 cells or cell groups connected in series. It combines battery protection with active cell balancing.

2. What is the voltage of a 4S LiFePO4 battery?

A typical 4S LiFePO4 battery has a nominal voltage of approximately 12.8V and a full-charge voltage of around 14.6V, depending on the cell and charging specifications.

3. What does the active balancer do?

The active balancer transfers energy between series-connected cell groups to help reduce voltage differences between them. Unlike passive balancing, it is designed to redistribute energy rather than simply dissipate it as heat.

4. Is the 100A rating continuous?

The advertised 100A rating does not automatically guarantee 100A continuous operation in every environment. Actual capability depends on the board design, thermal conditions, wiring, connectors, and manufacturer’s specifications.

5. Can this BMS be used with regular lithium-ion batteries?

No assumption should be made that a LiFePO4 BMS is suitable for conventional lithium-ion cells. The BMS should only be used with the chemistry for which it is specifically designed.

6. Does active balancing improve battery performance?

Active balancing can help maintain better voltage consistency between series-connected cells by transferring energy between them. Overall battery performance still depends heavily on cell quality, matching, temperature, charging, and pack design.

7. What charger is required for this BMS?

A charger specifically designed for a 4S LiFePO4 battery pack should be used. The charger must have suitable charging voltage and current for the battery pack.

8. Can this BMS be used for solar energy storage?

Yes, it can be used as part of a properly designed 12.8V-class LiFePO4 solar energy-storage system, provided the BMS, cells, charger/controller, wiring, fuse, and load are appropriately matched.

9. Can this BMS balance severely mismatched cells?

Active balancing can help manage normal cell-to-cell differences, but it should not be considered a solution for severely mismatched, damaged, or unsuitable cells. Properly matched cells are important when constructing a battery pack.

10. Where can I buy a 4S 100A LiFePO4 BMS with active balancer in Bangladesh?

You can buy the 4S 100A LiFePO4 BMS with Active Balancer from ElectroXBD, a trusted electronics components supplier in Bangladesh.

Common Questions:

Q: What is the price of 4S 100A LiFePO4 BMS with Active Balancer in Bangladesh?

A: The latest price of 4S 100A LiFePO4 BMS with Active Balancer in Bangladesh is 650 BDT.

Q: Where to buy 4S 100A LiFePO4 BMS with Active Balancer in Bangladesh?

A: You can buy the 4S 100A LiFePO4 BMS with Active Balancer at the best price from ElectroXBD in Bangladesh.