20A 4S 12.8V LiFePO4 BMS with Balancing and Temperature Control
The YHZX-6034-4S battery protection board is labelled for four 3.2V LiFePO4 cells in series, forming a 12.8V nominal battery pack. Its common charging/discharging port is marked ≤20A. The Chinese label states that the board includes balancing and temperature control.
Key Features
- 4S configuration for 3.2V LiFePO4 cells.
- 12.8V nominal pack voltage, commonly used in 12V-class battery systems.
- Common charge/discharge port rated up to 20A as printed on the label.
- Balancing and temperature-control functions stated on the product label.
- Metal cover, cell-sense connector and attached black temperature probe.
- Separate wiring harness shown in the supplied product photographs.
Specifications
| Model | YHZX-6034-4S |
|---|---|
| Battery chemistry | LiFePO4 / lithium iron phosphate |
| Series count | 4S |
| Nominal cell voltage | 3.2V |
| Nominal pack voltage | 12.8V |
| Labelled current | ≤20A |
| Port arrangement | Common charge/discharge port |
| Balancing | Included according to label; type and current unverified |
| Temperature control | Included according to label; thresholds unverified |
| P− | Shared charge/discharge negative |
| B− | Battery-pack negative |
Applications
For compatible 4S LiFePO4 battery-pack builds and repairs, including suitable 12V-class DC projects. Check load current, starting surges and charging requirements before selecting this board.
Installation and Compatibility
Use with 3.2V LiFePO4 cells. This board is not a replacement for a 4S BMS intended for 3.7V lithium-ion cells. Have a qualified battery technician confirm the exact wiring diagram, cell-sense sequence and terminal connections before use. Do not infer the connector pinout from wire colour alone. Use a charger suitable for the completed LiFePO4 pack.
Exact protection thresholds, peak current, balancing current, temperature limits, dimensions and weight have not been verified for this model. Bluetooth or app connectivity is not specified.
Package Includes
- 1 × YHZX-6034-4S BMS board with attached temperature probe.
- 1 × wiring harness shown in the product photo.
Battery cells and charger are not included. Product images have been edited to use a white background. The English-label image is a translation for reference; the physical product carries a Chinese label.