3S 1.2A Active Balancer for Li-ion LFP Battery Price in Bangladesh

The 3S 1.2A Active Balancer for Li-ion LFP Battery is designed to help maintain a more consistent voltage level between individual cells in a 3-series lithium battery pack. Cell imbalance can naturally develop during charging and discharging because individual cells may have slightly different capacities, internal resistance, aging characteristics, or self-discharge rates.

Unlike a simple passive balancer that removes excess energy as heat, an active balancer transfers energy from a relatively higher-voltage cell toward lower-voltage cells. This can make the balancing process more energy-efficient and reduce unnecessary energy loss.

This module is suitable for 3S lithium-ion and compatible LFP battery packs, depending on the exact version of the board. With a balance current of up to approximately 1.2A, it can be useful for battery packs used in portable electronics, DIY energy-storage projects, robotics, backup systems and other rechargeable battery applications.

What Is an Active Battery Balancer?

An active battery balancer is an electronic circuit used to reduce voltage differences between cells connected in series. In a 3S battery pack, three individual cells or cell groups are connected in series to obtain a higher overall voltage.

Because the cells are not perfectly identical, their voltage levels can gradually become different. An active balancing circuit monitors the cells and transfers energy between them to help maintain better voltage uniformity.

Key Features

• Designed for 3S lithium battery packs
• Supports compatible Li-ion and LFP battery chemistries
• Up to 1.2A active balancing current
• Transfers energy between cells instead of simply dissipating it
• Helps reduce cell-to-cell voltage differences
• Improves utilization of series-connected cells
• Compact PCB design
• Suitable for DIY and professional battery-pack projects
• Can complement an appropriate BMS
• Useful for rechargeable battery systems and energy-storage applications

Technical Specifications

Note: Exact operating voltage, activation threshold, standby current, dimensions and connector arrangement can vary between board revisions. Check the actual module before designing a production battery pack.

Working Principle

The module monitors the voltage condition of the three series-connected cells. When a voltage difference develops between cells, the active balancing circuit transfers part of the available energy from a higher-voltage cell toward a lower-voltage cell.

This energy-transfer approach differs from passive balancing, where excess energy from a higher-voltage cell is converted into heat through a resistor.

The balancing process helps the cells operate closer to one another in voltage, which can improve the overall consistency of a series battery pack.

Applications

The 3S 1.2A Active Balancer can be used in various low-voltage battery projects, including:

• 3S Li-ion battery packs
• 3S LFP battery packs where supported by the board
• DIY rechargeable battery systems
• Portable power systems
• Robotics projects
• RC and electronics projects
• Backup power applications
• Small energy-storage systems
• Battery-powered equipment
• Custom battery-pack development

Advantages

Active Energy Transfer

Energy can be transferred between cells rather than simply being dissipated as heat.

Better Cell Voltage Consistency

The balancer helps reduce voltage differences between individual cells in a series-connected pack.

Improved Battery Utilization

More consistent cell voltages can help the series pack operate more uniformly.

Compact Design

The small PCB format makes it convenient for integration into suitable battery-pack enclosures.

Suitable for Custom Battery Projects

It can be useful when designing custom 3S battery systems alongside a correctly selected BMS and charging system.

Limitations

• It is not a replacement for a BMS.
• It does not necessarily provide overcharge, over-discharge, short-circuit or over-current protection.
• Compatibility with LFP must be confirmed for the exact board version.
• The 1.2A figure represents the maximum or rated balancing capability under applicable conditions; actual current can vary with cell-voltage difference and operating conditions.
• Proper cell matching and an appropriate charging system are still important.

Installation & Usage Tips

• Confirm that the battery is a 3S configuration before connecting the module.
• Verify the module’s supported chemistry and voltage range.
• Connect the cell-monitoring wires according to the PCB markings.
• Check polarity carefully before powering the circuit.
• Use cells with appropriate capacity and similar characteristics in the same series pack.
• Use a suitable BMS for protection and battery management.
• Use a charger specifically designed for the battery chemistry and series configuration.
• Insulate exposed connections to prevent accidental short circuits.
• For permanent battery packs, use suitable enclosure, wiring and protection measures.

Why Choose a 3S Active Balancer?

A 3S active balancer is particularly useful when maintaining voltage consistency between series-connected cells is important. The energy-transfer balancing method can provide a more efficient alternative to conventional resistor-based passive balancing.

For custom battery packs, combining an appropriate BMS + active balancer + correct charger + properly matched cells can provide a more complete battery-management solution.

Why Buy from ElectroXBD?

ElectroXBD provides a range of electronic components, battery accessories, modules and development hardware for students, hobbyists, engineers and electronics projects in Bangladesh.

The 3S 1.2A Active Balancer is a practical choice for users working with 3S Li-ion or compatible LFP battery systems who need improved cell voltage balancing.

Frequently Asked Questions

1. What is a 3S active balancer?

A 3S active balancer is an electronic module designed to reduce voltage differences among three cells or cell groups connected in series by transferring energy between them.

2. Can this balancer be used with LiFePO4 batteries?

Many versions are designed for Li-ion and/or LiFePO4 batteries, but the exact supported chemistry depends on the specific board. Always verify the board specification before connecting it to an LFP pack.

3. What does 1.2A mean?

The 1.2A rating refers to the maximum balancing-current capability of the module under suitable operating conditions. Actual balancing current depends on the voltage difference between cells and the circuit’s operating conditions.

4. Is an active balancer the same as a BMS?

No. An active balancer primarily handles cell voltage equalization. A BMS can provide additional functions such as overcharge, over-discharge, over-current and short-circuit protection, depending on its design.

5. Can I use it with a 3S battery pack?

Yes, provided the battery chemistry and voltage range are compatible with the specific module. The pack must have three series-connected cells or cell groups.

6. Does active balancing waste energy as heat?

Active balancing is designed to transfer energy between cells rather than simply converting excess energy into heat through a balancing resistor. This can make it more energy-efficient than passive balancing.

7. Can it improve battery-pack performance?

Maintaining better voltage consistency between series cells can help the cells work more uniformly and can improve the practical usability of a properly designed battery pack.

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Common Questions:

Q: What is the price of 3S 1.2A Active Balancer for Li-ion LFP Battery in Bangladesh?

A: The latest price of 3S 1.2A Active Balancer for Li-ion LFP Battery in Bangladesh is 270 BDT.

Q: Where to buy 3S 1.2A Active Balancer for Li-ion LFP Battery in Bangladesh?

A: You can buy the 3S 1.2A Active Balancer for Li-ion LFP Battery at the best price from ElectroXBD in Bangladesh.