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PCM with Equilibrium &Temperature protection function for 14.8V Li-Ion / 12.8V LFP Battery Pack @ 30A limit (#6221)
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Product Options
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Protection Circuit Module for 4 Cells Li-Ion / LiFePO4 Battery Pack
This protection circuit is specially designed for 14.8V Li-Ion / 12.8V LiFePO4 Battery pack with 30A discharging rate. Different than normal PCB, it provides equilibrium function after battery pack is fully charged. PCM will detect each cell's voltage and trim higher voltage down until other cells reach the same voltage level. Therefore, it helps Li-Ion cells have longer service life. Also the PCM will provide the following protections:
| No. |
Test item
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Criterion
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| 1 |
Voltage |
Charging voltage |
CC/CV
Li-ion/Li-polymer(4.2V/cell)
LiFePO4(3.6V/cell)
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| Balance voltage for single cell |
Li-ion:4.20 V±0.03V，
LiFePO4:3.60V±0.03V |
| 2 |
Current |
Balance current for single cell |
0-130mA |
| Current consumption for single cell |
≤20μA |
| Maximal continuous charging and discharging current |
30A |
| 3 |
Over-charge Protection |
Over charge detection voltage |
4.25V +/- 0.025V (Li-Ion)
3.9V +/- 0.025V (LFP) |
| Over charge detection delay time |
0.5-1.5S |
| Over charge release voltage |
4.05V +/- 0.025V (Li-Ion)
3.8V +/-0.025V (LFP) |
| 4 |
Over-discharge Protection |
Over discharge detection voltage |
2.5V +/- 0.07V (Li-Ion)
2.0V +/-0.05V (LFP) |
| Over discharge detection delay time |
100-200mS |
| Over discharge release voltage |
3.0V +/-0.1V (Li-Ion)
2.3V +/-0.05V (LFP) |
| 5 |
Over-Current Protection |
Over current detection voltage |
0.6V +/- 0.1V |
| Over current detection current |
90-110A |
| Detection delay time |
5-15ms |
| Release condition |
Cut load |
| 6 |
Short Protection |
Detection condition |
Exterior short circuit |
| Detection delay time |
100-500us |
| Release condition |
Cut load |
| 7 |
Resistance |
Protection circuitry（B+ to P+） |
≤30mΩ |
| 8 |
Temperature |
Operating temperature range |
-40-+85℃ |
| Storage temperature range |
-40-+125℃ |
| 9 |
Temperature Protection |
Thermostat
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60℃ |
| 10 |
Size |
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L60*W60*T5mm |
| 11 |
Specification |
 12.8V (4S)
14.8V (4S)
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Warning
- If you want to use this pcm for a battery that is rated less than the Maximum Discharge drain, you must add additional protection device to protect the battery itself. Such as: proper rated polyswitch.
- To achieve balance, each cell in battery pack must has equal voltage within tolerance of 0.02-0.03V. When charger LED turn Green, allow 30 minutes for pack to balance before use
- You must be professional in Li-Ion battery pack to buy the PCM. Misusing PCM may cause battery damage or explode. We are not responsible for any damage caused by user.
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Product Reviews
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