4S 15A LFP BMS
Product Description
The 4S 15A LiFePO₄ BMS is a high-performance Battery Management System designed for 4-series LiFePO₄ (LFP) battery packs (nominal 12.8 V). With continuous charge/discharge support up to 15A, this BMS provides comprehensive protection including overcharge, overdischarge, overcurrent, short-circuit, and cell balancing.
Ideal for solar energy systems, e-bike packs, power backup systems, and DIY battery projects, this BMS ensures safer operation and longer cycle life of your LFP battery pack.
Technical Specifications
| Parameter | Specification / Range |
| Supported Battery Type | LiFePO₄ (LFP) |
| Series Configuration | 4S (4 cells in series) |
| Nominal Pack Voltage | ~12.8 V |
| Continuous Charge Current | Up to 15A |
| Continuous Discharge Current | Up to 15A |
| Peak / Surge Discharge Capability | (depends on model) |
| Overcharge Detection Voltage | 3.65 V ± 0.05 V per cell |
| Overcharge Release Voltage | 3.55 V ± 0.05 V per cell |
| Overdischarge Detection Voltage | 2.50 V |
| Overdischarge Release Voltage | ~2.70 V |
| Balance Function | Passive balancing |
| Balance Current | ~30 mA typical per cell |
| Operating Temperature | Around –40 °C to +85 °C |
| Standby / Quiescent Consumption | Low (μA level) |
| Protection Features | Overcharge, overdischarge, overcurrent, short circuit |
| Connections / Wiring | B+, B–, B1, B2, B3 taps; P+, P– terminals |
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