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Protection Circuit Module (PCM) with Equilibrium function for 51.8V Li-Ion Battery Pack at 40A rate (#7791)

Your Price: $106.95
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Product ID # 7791
Part Number:

 Protection Circuit Board Specifications  For 51.8V Li-ion/Li-po Battery  Pack 
Model: PCM-LI51.8V40A2
No. Test   item Criterion
1 Voltage Charging voltage DC: 58.8V CC/CV (4.2V/1cell)
Balance voltage for single cell 4.20V±0.030V
2 Current Balance current for single cell 84mA±5mA
Current consumption for single cell ≤20μA
Maximal continuous Charging current 40A
Maximal continuous discharging current 40A
3 Over charge Protection
(single cell)
Over charge detection voltage 4.325±0.025V
Over charge detection delay time 0.5S-2S
Over charge release voltage 4.075±0.025V
4 Over discharge protection
(single cell)
Over discharge detection voltage 2.50±0.05V
Over discharge detection delay time 100-200mS
Over discharge release voltage 2.9±0.05V
5 Over current protection Over current detection voltage 0.6V±0.1V
Over current detection current 150±20A
Detection delay time   5ms-15ms
Release condition Cut load
6 Short protection Detection condition Exterior short circuit
Detection delay time 200-500us
Release condition Cut load
7 Resistance Protection  circuitry (B- TO P-) ≤30mΩ
8 Temperature Operating Temperature Range -40 to +85℃
Storage Temperature Range -40 to +125℃
Over Temperature Protection (discharge)
has 60°C Thermostat
9 Dimenstion LxWxT 130x100x10 mm
10 Weight 6.5 oz

 For other PCM/PCB, please check our PCM/PCB/BMS/CMB/UPS category


  • If you want to use this protection circuit board for a battery that is less than the rated drain, you must add additional protection device to protect the battery itself. Such as: proper rated polyswitch. 
  • You must be professional in Lithium battery pack to buy the protection circuit board. Misusing may cause battery damage or explode. We are not responsible for any damage caused by user.

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