Protection Circuit Module [PCB] for 11.1v (3S) Li-ion Battery Pack (Cutoff 15A)

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Sale Price: Qty purchase only, MOQ 1000 pcs
Item Number: 32071

Features and Benefits

  • Protection Circuit Board for 11.1V Li-ion and Li-polymer battery pack.
  • Designed for 11.1V Li-ion or Li-Polymer battery.
  • Prevents 11.1V Li-ion or Li-polymer battery from over-charging, over-discharging.
  • Continuous Discharge Current: 15A.
  • Fully Compatible with both Li-Ion and Li-Polymer cells

Connection Instruction

  • B+: Connect to cell 1's positive terminal.
  • B-: Connect to cell 3's negative terminal.
  • B1-: Connect to cell 2's positive terminal.
  • B2-: Connect to cell 3's positive terminal.
  • P+: Connect to the battery's output or the charger's positive terminal.
  • P-: Connect to the battery's output or the charger's negative terminal.

Technical Specifications

Item Content Criterion
Application Battery Type Li-ion/polymer Battery
Battery Cell 3S
Over charge protection Over charge detection voltage (cell) 4.2±0.025V
Over charge release voltage (cell) 4.1±0.050V
Current continuous charge current 4A
continuous discharging current 4A
over current detection current 15A±3A
Over discharge protection Over discharge detection voltage (Cell)


Over discharge detection voltage 8.6±0.300V
Short Protection With/without short protection Have
Release condition Disconnect load
Interior resistance Main loop electrify resistance


Current Consumption Current consume in normal operation ≤100µA
PCB Dimension (LxWxT) 50x17x1mm

Application Notes

  • Do not subject the PCB to input voltage over 20V. Input voltage over 20V will damage the PCB
  • Please use the compatible charger for your battery pack. Pay special attention to your input and output voltage current to avoid PCB damage.
  • When mixing over-charged batteries and over-discharged batteries together, PCB will be in dual state of over-charging and over-discharging. In this situation, charging and dis-charging are both disabled
  • Internal static charge protection circuit built into the PCB. However, do not subject the PCB to high static charge to avoid damage.
  • Without the written agreement from us, please don't use this PCB for application in medical instruments, emergence devices, auto and airspace vehicles or other device that might have impact on human body.

Because of the very high energy density, Li-Ion Battery pack must be connected to a protection circuit module to prevent  accidental battery explosion caused by over-charging or over-discharging.

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