Deligreen is a one stop power system provider, engaged in research and development and sales of lithium battery and its accessories.

The main products are the distribution of large cell of domestic famous brand, BMS, Active balancer, charger, home energy storage and electric vehicle charging cable.

A BMS (Battery Management System) is essential in a Lithium-Ion battery system. If you are connecting your LiFePO4 cells in series to create a 12.8V battery pack, you MUST run a BMS to ensure that your batteries are not over charged/discharged.

This device manages a real-time control of each battery cell, communicates with external devices, manages SOC calculation, measures temperature and voltage, etc.

Intellegent Control Accurate Data

Monitor the Battery status in Real-Time base by checking the battery capacity and observing the voltage of each string in Real-Time.

  • Real-Time Positioning
  • Remote Power Off
  • Remote Sofware Upgrade

This BMS is programmable through either Bluetooth and Smart phone or through a PC.


  • Bluetooth Connectivity
  • Over charge/discharge disconnect
  • Short-circuit protection
  • Temperature sensor
  • Over Current Protection
  • Low power consumption
  • Anti-Corrosion, high water resistance
  • 5A Parallel Module (Optional Extra) 

UART: UART is Universal Asynchronous Receiver/Transmitter, It transforms the data to be transmitted between serial communication and parallel communication. As a chip to convert parallel input signals into serial output signals, UART is usually integrated into other communication interfaces.

Model 4S 250A
Constant Discharge Current
250 A
Over-Discharge Current Protection
600 A ± 100 A
Charge Voltage
Series.No *3.65V
Charge Current
125 A
Over Charge Voltage
3.75v ± 0.05v
Over Charge Volt Protect Delay
1 Second
Over Charge Volt Release
3.55v ± 0.05v
Power Balance Voltage
Balance Release Voltage
Balance Current
200 ± 5mA
Over Discharge Detect Voltage
2.2v +- 0.1V
Over Discharge Detect Delay
1 Second
Over Discharge Volt Release
2.7v +- 0.05V
Over Current Detect Delay
1 millisecond
Over Current Protect Release
Short Circuit Protection External load short circuit
Short Circuit Detect Delay
1 millisecond
Short Circuit Detect Release
Temp Protection Charge 0°c Discharge 70°c
Main Circuit Resistor
<20 mΩ (milliohm)
Working Current
500 µA (microamps)
Sleepy Current (When Battery is Over Discharged)
<20 µA (microamps)
Working Temp Range
-20°c to +70°c
Storage Temp Range
-40°c to +80°c
Dimesnions L x W x H (mm) 221 x 130 x 32mm
Weight 1.6kg


Barcode # 4S250A
Brand Deligreen
Shipping Weight 1.8000kg
Shipping Width 0.500m
Shipping Height 0.070m
Shipping Length 0.190m
Shipping Cubic 0.006650000m3

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