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4S 12V 250A NCM Battery Management System BMS With Fan

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China Deligreen Power Co.,ltd certification
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4S 12V 250A NCM Battery Management System BMS With Fan

4S 12V 250A NCM Battery Management System BMS With Fan
4S 12V 250A NCM Battery Management System BMS With Fan
4S 12V 250A NCM Battery Management System BMS With Fan 4S 12V 250A NCM Battery Management System BMS With Fan 4S 12V 250A NCM Battery Management System BMS With Fan

Large Image :  4S 12V 250A NCM Battery Management System BMS With Fan

Product Details:
Place of Origin: china
Brand Name: Deligreencs
Certification: CE/UL/ROHS/FCC
Model Number: NCM4S12V250A
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: Negotiable
Packaging Details: carton
Delivery Time: 15 days
Payment Terms: D/A, D/P, T/T, Western Union
Supply Ability: 1000 pcs/day

4S 12V 250A NCM Battery Management System BMS With Fan

Charge Voltage: 17V Charge Current: 125A
Over Charge Volt: 4.25±0.05 Over Charge Volt Protect Delay: 1
Over Charge Volt Release: 4.15±0.05 Constant Discharge Current: 150A
Peak Discharge Current: 600±100 Balance Current: 35±5
High Light:

4S 250A 12v battery management system


4S NCM Battery Management System BMS


4S 12V 250A Battery Management System BMS

Lithium NCM Battery Management System BMS 4S 12V 250A With Fan


Where does the BMS use?

  • Electric scooter
  • E-bike
  • Tourist sightseeing vehicle
  • Electric tricycle
  • Low speed EV
  • Emergency UPS
  • Solar street light
  • RV&Home energy storage

4S 12V 250A NCM Battery Management System BMS With Fan 0

Where do I use BMS?

Put it where your battery is.pls check the connection diagrame below.pls confirm is a common port or a separate port BMS.

Connection diagrame

4S 12V 250A NCM Battery Management System BMS With Fan 1

NOTE:Pls kindly follow up the guide,in case the battery gets burnt by short circuit.

1, PIs do not insert balance wires into BMS before connecting batteries, must make sure connecting with batteries correct.

2, The sequence of connecting wires for BMS:

Notes: PIs ensure to use balancing wires from Daly!

1. From thin black balance wire to start, the 2nd wire(thin red wire) connect with the 1st battery's positive pole. Then connect each ell's positive pole in order until the last one B+;

  • Do not insert the connector directly after the wires were connected. Measure the voltage between two adjacent metal terminals on the back of the connector. If it is Li-ion battery, the voltage should be between 3.0 ~ 4.2V, Lifepo4 battery should be between 2.0 ~ 3.6V, and LTO battery should be between 1.5~ 2.75V;
  • After the wiring sequence and voltage are confirmed to be correct, then insert into BMS; .
  • Adjust the multimeter to the buzzer position and measure the internal resistance between B - and P -when the internal resistance is 0, there will be a beep, which means that the BMS is good. Otherwise,do not weld and contact the customer severice.;
  • The last step to connect B-(thick blue wire) with battery pack's total negative pole.

After finished wiring:

Measure whether the B + and B-voltage and B + and P-voltage of the battery are equal, If yes, it means the BMS works normally and can be used. If not, please recheck according to the above wiring sequence.


What is 4S12V 250A Common Port with fan?

This is a smart battery management system,which monitor and control the status of the batteries&battery pack.It's a lifepo4 battery BMS,4 batteries in series,12V,250A current.common port with cooling fan.


Is the fan always working?

The fan is not working until the temperature at 50 degree to save the energy consumption at low temperature.


BMS 4S 12V 150A Specification

Datasheet for 3.7V Rated Li-ion BMS( 80A-250A )
  Content Spec Unit Remark
80A 100A 120A 150A 200A 250A A  
Discharge Constant discharge current 80 100 120 150 200 250 A  
Over-discharge current protection 250±50 300±50 400±100 500±100 600±100 600±100 A  
Charge Charge voltage Series No. * 4.25 V  
Charge current 40 50 60 75 100 125 A Common port
Charge current 50A as default A Separate port
Over charge protection over charge volt 4.25±0.05 V  
over charge volt protect delay 1 S  
Over charge volt release 4.15±0.05 V  
Power balancing Power balance volt 4.18 V  
balance release volt 4.18 V  
balance current 35±5 mA  
Over discharge protection Over discharge detect volt 2.7±0.1 V  
Over discharge detect delay 1 S  
Over discharge volt release 3.0±0.1 V  
Over current protection Over current detect delay 1 MS  
Over current protect release Off load    
Short circuit protection Short circuit protection External load short circuit    
Short circuit detect delay 250 uS  
Short circuit detect release Off load    
Temperature protection Temp protection charge<0℃, discahrge>70℃ Can be customized
resistance Main circuit resistor ≤20  
Self-consumption Working current ≤100 uA  
Sleepy current(when battery is over discharged ) ≤20 uA  
Working temp Temp range -40~80  
Storage temp Temp range -40~80  


The separate parts of smart BMS


  • Two wheels style heatsinks
  • Wave style heatsink
  • High current board(with 3mm pure copper port)
  • Thermally conductive silica gel
  • Pure aluminum heatsink

What smart/soft function does it have?

There are severl options for the smart BMS,which you can have different function from it.Deligreen's smart BMS has CAN/UART/FAN,and LCD control.It denpends on what protocal of your battery is.We will supply the relevant cables for the connection,UART,USB.CAN.


4S 12V 250A NCM Battery Management System BMS With Fan 2



4S 12V 250A NCM Battery Management System BMS With Fan 3



Q:Which current of the PCB should i choose?

A:Take 13S 48V pack as an example: Which PCB you should choose depends on the power of your motor or the current limitation of your controller. Below 350W ,you can choose 16A.Below 500W, you can choose 18A, Below 800W, you can choose 35A,Below 1KW, you can choose 60A. Above 1200W, the same. If you are not sure, please contact us freely.


Q:What battery types do your BMS work with?

A:Our BMS can work for lithium phospate battery(Lifepo4)and NCM battery,lithium ion battery,ple let us know what your battery type before placing order.


Q:What BMS range can you supply?

A:Deligreen is a professional BMS supllier with abundant BMS range.Series from 3S-32S,Current from 10A-500A,if you need more series,pls contact us.


Q:How to choose the BMS that I need?

A:You need to make sure of following

1.battery type

2.charge current

3.discharge current

4.battery pack(series,parallel)

5.Peak discharge current


Q:Can I watch the battery status from my mobile phone?

A:Yes,this is waht a samrt BMS do,you can watch the status of your batteries in your APP throush bluetooth connected between phone and the BMS.


Why deligreen BMS?

Deligreen was founded in 2010 and we have sold BMS for more than 10 years.BMS is one of our best sellers.The customers from more than 90 countries in the world have been using Deligreen's BMS,our BMSes are protecting tremendous amount of batteries in the world.It's worthy the every dollar/cent you spend on our BMS.;)


Why do we need battery management system?

Battery Management Systems are the brains/CPU behind battery packs. They manage the output, charging,discharging and provide notifications on the status of thebattery pack. They also protect the batteries from damage.

Lithium ion is a kind of active metal,compared to lead acid battery,lithium ion is more active,which casuses over charge,over discharge problem.It needs a protection.BMS is the one that protect your battery from be damaged.

Now you are replacing the lead acid battery with lithium battery,it's worthy spending little money on protection of your batteries,which can save much money.


What is battery management system BMS?

Deligreen BMS is defined as an electronic system that manages a rechargeable battery(lithium phosphate,NCM battery,single cell or battery pack) by monitoring its state, calculating secondary data, reporting that data, protecting the battery, controlling its environment, and/or balancing it.This is a very worthy of money to make your battery packs a BMS.


Where to buy battery management system?


Pls go to the bottom of this page,and send us your requirement,we will contact you by email or whatsapp to recommend the BMS you need.We can ship to you freight charge included.


How does battery management system work?

The battery management system monitors battery conditions and takes actions to extend battery life. If excessive battery drain is detected, the system temporarily disables some electrical systems to protect the battery.


About US

Changsha Deligreen Power Co.LTD,founded in 2010,is a "Green Energy Solution Service Provider".

Newest technology,new idea,hard-working and honest people.

Focus on lithium rechargeable battery,BMS,Balancer,charger and relative products.

BMS is one of best sellers,we've been receiving thousands of good comment from our clients because of its good quality and function 





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Contact Person: Leo Zeng

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