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Description
Heltec 4S-6S Active Equalizer: High-Efficiency Energy Transfer Balancer
The Heltec 4-6S Active Equalizer is a high-performance power management solution designed to maximize the lifespan and efficiency of Lithium-based battery packs. Unlike traditional passive balancers that waste energy as heat, this module utilizes inductive energy transfer to move charge from high-voltage cells to low-voltage cells in real time.
Core Technology: Active Inductive Balancing
Most standard BMS units use “passive” balancing, which simply drains the strongest cells through a resistor. The Heltec Active Balancer employs a high-efficiency internal transformer architecture. It detects voltage differentials across the pack and “pushes” current from the strongest cells to the weakest.
Key Technical Specifications
* Battery Compatibility: Li-ion (NCM), LiFePO4 (LFP), and LTO battery strings.
* Cell Count: Supports 4S, 5S, and 6S configurations.
* Balancing Current: 0–5.5A (The greater the voltage difference, the higher the balancing current).
* Balance Accuracy: Within 5mV (typical), ensuring ultra-precise cell matching.
* Under-voltage Protection: Automatic sleep mode triggers if a cell drops below 3.0V (Li-ion/LiFePO4) to prevent over-discharge.
* Static Power Consumption: Extremely low at roughly 12mA.
Performance Features
* Continuous Correction: The balancer operates as long as there is a voltage difference, meaning it works during charge, discharge, and even when the battery is idle.
* Thermal Efficiency: Because it transfers energy rather than burning it off, the module stays significantly cooler than passive alternatives, making it ideal for enclosed battery boxes.
* Ultra-Low Internal Resistance: Uses high-spec 2oz copper PCBs and low-resistance MOS components to handle high-current throughput.
Ideal Applications
* Solar Energy Storage: Keeping LFP banks healthy for long-term off-grid use.
* Electric Vehicles: Balancing high-drain packs in e-bikes, scooters, and DIY EV conversions.
* High-Power Drones: Maintaining cell health in 4S-6S LiPo/Li-ion flight packs.
* Battery Repair: Restoring “out-of-sync” packs that a standard BMS can no longer recover.
