BMS LiFePO4 4S 35 A LiFe

BM1322 PCB 4S 35A LiFe

1 Model BM1321 4S-35A working current

2 Voltage Charging voltage 14.4V

3 Current

Maximal continuous charging current 35A

Maximal continuous discharging current 35A

Current consumption ≤20μA

4 Overcharge Protection

Over charge detection voltage 3.90V±0.025V

Over charge detection delay time 0.5~2S

Over charge release voltage 3.80V±0.025V

5 Over Discharge Protection

Over discharge detection voltage 2.00V±0.05V

6 Over Current Protection

Over discharge detection delay time 50~200mS

Over discharge release voltage 2.30V±0.1V

Over current detection voltage 0.1V~0.2V

Over current detection current 105±20A

Detection delay time 5~20mS

Release condition Cut load,automatically recover

7 Short Circuit Protection

Detection condition Exterior shot circuit

Detection delay time 200~500uS

Release condition Cut load,automatically recover

8 Balance

Balance voltage for single cell 3.60V±0.025V

Balance current for single cell 72mA±10mA

9 Resistance Inner resistance ≤20mΩ

10 Temperature

Operating temperature range -40~+85°C

Storage temperature range -20~+125°C

11 Size (L*W*T) L115mm*W65mm*T9mm

Remarks:

Protective and balancing circuit for LiFePO4 cells - designed for 4 cells in the serie, the total nominal voltage 12,8 V, balancing voltage 3.6 V.

Battery ManagementSISTEM ( BOARD)

The easiest way to protect a lithium battery pack. The BMS board manages a pack of cells and disconnects the load under any unfavorable circumstances: cell over voltage, cell under voltage.

The BMS is connected between the battery pack and the load and the charger. There are additional wires from single cells to the BMS to monitor each cell. (Marking of the contacts: B+/B- to connect to the battery; B1, B2, B3..... to connect to each cell; CH+/CH- to connect charger (optional); P+/P- the whole PACK (battery with BMS) output to the load.)

Voltage of the packs:

BMS for 4 cells 12V

Please observe the maximal current of the pack including the peak currents when starting or connecting the equipment.

Note: the balancing currents of the BMS boards are very low (only few milliamps), this means it is not possible to balance large capacity cells. We suggest using additional balance modules to increase the balancing current of the cells.

Specification:

Continuous Power: 80A

Peack Power: 160A

Operational temperature

-40 to 85 °C

Dimension

120 x 80 x 30 mm

Weight

185g