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Protection Circuit Module (PCM) with Equilibrium Function for 25.9V Li-Ion Battery Pack at 50A limit (#1923)

Your Price: $85.95
In Stock

Product ID # 1923
Part Number:

Quantity Discounts

5 to 20$83.37
21 to 50$81.65
51 to 100$79.93
101 or more$77.35

This protection circuit is specially designed for 25.9V Li-Ion Battery pack with 50A 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.

Protection Circuit Module Specifications  For 25.9V Li-ion/Li-Po Battery  Pack
Over-charge protection voltage 4.325±0.025V
Over-discharge protection voltage 2.50±0.05V
Balance voltage for single cell 4.20V±0.025V
Over-current protection 140±10A
Maximal continuous Discharging current 50A
Maximal Current consumption 20uA
Short circuit protection Automatic Recovery
Protection  circuitry  resistance (B- TO P-) ≤20mΩ
Dimension Main bd:127mm(5.0") x 93mm(3.6") x 9mm(0.35") 
Daughter bd: 95mm (3.8") x 48mm (1.9") x 8mm (0.3")
Weight 4.6 Oz (128 grams)

P+ = Charge+ / Discharge +
P- = Charge- / Discharge -

Specification Download Specification

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. 
  • To achieve balance, each cell in battery pack must has equal voltage within tolerance. When charger LED turn Green, allow 30 minutes for pack to balance before use.
  • 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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Product Reviews

(1 Rating, 1 Review) Average Rating:
Works Good
Russ Linzmeier (Reedley, CA) 12/24/2019 12:50 PM
Most of the BMS units I've looked at were for very small battery packs , the bleed-off resistors in them were so small you would need a magnifying glass to see them , not this one . they are very large . To test it I deliberately overcharged one 18650 battery to 4.6 volts and temporarily installed it in my huge 7S battery pack and watched the resistors with a thermal camera and sure enough the PCM found the overcharged cell and started to drain off the excess charge , the appropriate resistor started to heat up just like it is supposed to do .
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