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BMS D684V1 for 14.8V 4S Li-ion/Li-Polymer Battery Packs (20A Charge, 40A Discharge)

1. Protection Circuit Board for 14.8V 4S Li-ion and Li-Polymer battery pack;
2. PCM applies for 4 cells Li-ion/Li-Polymer battery pack with E-Switch integrated, E-Switch can totally turn off the output;
3. To prevent the battery packs from overcharge, over discharge, over current, over temperature ,short circuit ;
4. With cell balance/equilibrium function;
5. Compatible with both Li-ion and Li-Polymer cells; 
6. How balancing function works? 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 cells have longer service life.
7. PCM comes with all the voltage detection wires and connectors.
We keep materials in stock only, we need around 3-7 days for samples productions. 

Sale Price:$
Quantity Amount
51-100 $37.59
101-200 $37.09
200+ $36.09
Weight:73g Model:
Total cost:

Quantity: (stock:

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Content Criterion
Model HCX-D684V1LI04S40A-04/367008AAD01 4S-40A working current
Voltage Charging voltage 16.8V
Current Maximal continuous charging current 20A
Maximal continuous discharging current 40A
Current consumption ≤50uA
Overcharge Protection Over charge detection voltage 4.25V±0.02V
Over charge detection delay time 700mS-1300mS
Over charge release voltage 4.15V±0.05V
Over Discharge Protection Over discharge detection voltage 2.80V±0.05V
Over discharge detection delay time 700mS-1300mS
Over discharge release voltage 3.0V±0.1V
Over Current Protection
(1st Protection)
Over current detection current 80A±10A
Detection delay time 80-120mS
Release condition Cut load, automatically recover
Over Current Protection
(2nd Protection)
Over current detection current 160A±20A
Detection delay time 8-15mS
Release condition Cut load, automatically recover
Temperature Protection
(Multi NTC’s are available)
Charge over temperature protection 55°C
Discharge over temperature protection 75°C
Charge under temperature protection -7°C
Discharge under temperature protection /°C
Short Circuit Protection Short circuit detection current >=400A
Detection delay time 220-400uS
Detection condition Cut load, automatically recover
Balance Balance voltage for single cell 4.18V±0.015V
Balance current for single cell 42mA±5mA
Resistance Inner resistance ≤20mΩ
Temperature Operating temperature range 0~+85℃
Storage temperature range 0~+85℃
Size(L*W*H) L95mm*W60mm*H12mm