Smart BMS 4s 12V LiFePO4 Battery Management System

Product Description Parameters for li-ion 4S 12V BMS DescriptionSpecificationUniteRemarks20A30A40A60ADischargecontinue discharge current20304060A Discharge Peak current65165165200A Over current protection65165165200A ChargeCharge voltage17V Charge current20304060ACharge current 8A in separate p

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Product Description
Parameters for li-ion 4S 12V BMS

continue discharge current20304060A 
Discharge Peak current65165165200A 
Over current protection65165165200A 

Charge voltage17V 
Charge current20304060ACharge current 
8A in separate port

Over charge
Over charge detect voltage4.25±0.025V 
Over charge protection delay0.5S 
Over charge release voltage4.15±0.05V 

Balance detection voltage4.18V 
Balance release voltage4.18V 
Balance current30mABalance current30±5mA

Over discharge detect voltage2.7±0.05V 
Over discharge detect delay0.5S 
Over discharge release voltage3.0±0.05V 
Over current
Over current detect voltage150mV 
Over current detect delay9MS 
Over current protection release conditionsOff load  
Short circuit
Short circuit protection conditionsshort circuit with extermal load  
Short circuit detection delay250uS 
Short circuit protection release conditionsOff load  
Temp ProtectionNAºCAs Requirement
Inner resistanceMain circuit conductive inner resistance≤10 
Self electricity
Working current≤40uA 
Sleeping current(Battery in overdischarge)≤20uA 
Temp range-30 to 80ºC 
Li-ion bms 4s
BMS, short for BATTERY MANAGEMENT SYSTEM, is the link between the BATTERY and the user. Its main object is a secondary battery,
mainly to improve the battery utilization rate, to prevent excessive battery charging and excessive discharge, which can be used in electric
cars, battery cars, robots, unmanned aerial vehicles.

Detail images

Smart BMS 4s 12V LiFePO4 Battery Management System

Smart BMS 4s 12V LiFePO4 Battery Management System

Smart BMS 4s 12V LiFePO4 Battery Management System


Smart BMS 4s 12V LiFePO4 Battery Management System


The lithium battery is Dangerous Good for shipment by Sea and By air and they should be shipped under the regulation of UN3480. All EVL
batteries are packaged by DG plywood case and we provide UN38.3 test report and MSDS.
Please check shipping cost before place order, the lithium battery is Dangerous Good, the shipping cost is very different, so please check shipping
cost before place order.
Smart BMS 4s 12V LiFePO4 Battery Management System

Company Introduction
Smart BMS 4s 12V LiFePO4 Battery Management SystemSmart BMS 4s 12V LiFePO4 Battery Management SystemSmart BMS 4s 12V LiFePO4 Battery Management System

EVL Battery Limited is a leading NCM Lithium Battery manufacturer from China and its public company in the Hongkong Stock Exchange
market. There are 4 factories in Fujian and Guangdong. The production capacity of 4 factories is as much as 20 GWh per year. EVL Battery
Limited is the number one Lithium Battery manufacturer from China.
Our Services & Strength
We provide high-quality EVL Battery to clients all over the world and help clients deliver batteries from China to them by sea and by air at a
reasonable price. And we provide the necessary technical support and warranty to you!


Q: What is the life expectancy of a Lithium battery?
A: The typical estimated life of the Lithium Iron Phosphate (LiFePO4) battery is 5-15 years or 2000 to 8000 charge cycles. One charge cycle
is a period of use from fully charged, to fully discharged, and fully recharged again.

Q: If I want to solar charge LiFePO4/Lithium Ion battery, which already has PCB, would a normal SLA controller work fine?
A: For LiFePO4 / Lithium-Ion battery, we always recommend using the LiFePO4/Lithium-Ion solar controller. Especially if you are using the battery
as UPS (backup power supply). The Lead-Acid solar controller will constantly provide pulse current to the battery, in the long run, it might
damage the PCB. So the PCB won't be able to protect the battery when it should be.

Q:I am a distributor. Can I cooperate with the battery warehouse for a long time?
A: Yes, Individual pricing for large scale projects and wholesale demand is available

Q: Why hasn't my ups or FedEx transportation number been updated?
A: This is normal, in countries with tariffs, our packages need to pass the customs of your country before they can be delivered to the local
UPS or FedEx. Once they pass the customs and update the transportation number, you can usually receive the goods within 3-5 days.

Q: Are the cells I bought balanced?
A:We know the importance of maintaining the consistency of each cell in the battery pack, so we will match and balance all cells to ensure
that the internal resistance, voltage, and capacity of cells are completely matched and balanced before delivery. This process is very necessary

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