PCM for 3-Cells Lithium-Polymer Batteries

Cell Controller/Protection unit (PCM) for 3 Rechargeable Lithium-Polymer Cells in series


We have Cell Controllers that control many more cells (i.e. 3, 4, 5, 6, 8,10, 12, 15, 16 & 20 cells). Ask us for a quote by sending an email; info@e-transportation.eu

More details

48,00 € tax incl.


10 items in stock

Protects Rechargeable Lithium-Polymer Cells against Under-& Over Voltage and Over Current.


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


Features and Benefits

  • Protection Circuit Board for 11.1V Li-ion and Li-Polymer battery pack
  • Designed for 11.1V Li-Polymer battery
  • Prevents 11.1V Li-Polymer battery from over-charging & over-discharging
  • Continuous Discharge Current: 9A
  • Fully Compatible with Li-Polymer cells
  • RoHS Compatible


Connection Instruction

  • B+: Connected to the third battery’s positive terminal
  • B1-: Connected to the second battery’s positive terminal
  • B2-: Connected to first the battery’s positive terminal
  • B-: Connected to the first battery’s negative terminal

  • P+: Connected to the battery’s output or the charger’s positive terminal
  • P-: Connected to the battery’s output or the charger’s negative terminal


Technical Specifications:



Battery Type


Number of Battery Cells

for 3 Cells in series

Input Charging Voltage


Input Charging Current


Continuous Discharge Current


Over Charge Detection Voltage (Cell)


Over Charge Release Voltage (Cell)


Over Discharge Detection Voltage (Cell)


Over Discharge Release Voltage (Cell)


Over Discharge Detection Current


Release Condition

Cut load

Detection Delay Time


Short Circuit Protection

yes, implemented

Release Condition

Cut Short Circuit

Main Loop conduction Resistance

VC=4.2V: Rss≤60mΩ

Current Consumed in normal Operation

35μA Max.

Dimensions (mm)

50 x 16 x 1.1 mm
Weight (gram)



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.




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