Smart 3s 4s 7A Protection Circuit Module for 11.1V 14.8V Li-ion BMS

• Customization: Available
• Overcharge Protection: Yes
• Ovediscahrge Protection: Yes
• Model NO.: LWS-4S7A-039
• Balance Function: Yes
• Usage: Lithium Battery Packs, LiFePO4 etc
• Application: Digital Equipment, Electrice, Ebike, etc
• Delivery Time: 7-15 Days After Payment for Small Order
• Metal Coating: Copper
• Mode of Production: SMT
• Layers: Multilayer
• Base Material: Fr-4
• Certification: RoHS, ISO
• Customized: Customized
• Condition: New
• Testing Service: 100%E-Testing
• Transport Package: in: Vacuum Packing/out: Packing: Carton Packing
• Specification: L50*W20*T5mm
• Trademark: lws
• Origin: Shenzhen, Guangdong
• HS Code: 8536300000
• Production Capacity: 10000/Month

Product Description

Mode	LWS-4S7A-030
PCM Size	L50*W20*T5 mm
battery series	3S/4S Available
working current	4Available
Usage(Cell Type)	Li-ion battery packs (11.1V/14,8V /cell) LiFePO4 battery packs (9.2V/12.8V/cell)
Application	Ebike, Solar products, etc
Sample	available

 

Electric Switch, Temperature Switch, Passive Balance, Active Balance, 5V output, NTC,bluetooth UART/BT/RS485/CAN communication/LCD dispay and etc., if you need any above accessories, please must to contact our sales fisrt. All items could be customized to your requirements,if without any requests after order placed, we will produce as specification in details page.

LWS Smart 3S/4S 7A Protection Circuit Module is a versatile BMS designed for 11.1V and 14.8V lithium-ion battery packs with 3-series or 4-series cells. It offers 7A protection, ensuring safety and efficient management for your Li-ion battery applications.

 

Li-ion Product Specifications-LWS
		Product  parameters(example:LFion-13S)
		15A	25A	30A	40A	100A	200A	Supplement
Current	Maxi mal continuous charging current	15A	25A	30A	40A	100A	200A	About yourproducts, just tellus the ratedvoltage / current or application etc ,we will help to recommend the most suitable products for you.
	Maxi mal continuous Discharging current	15A	25A	30A	40A	100A	200A
Over current protection	Over current detection current	80±20A	120±20A	120±20A	120±20A	300±50A	600±100A
Resistance	Protection circuitry (MOSFET)	≤20mΩ	≤20mΩ	≤20mΩ	≤20mΩ	≤20mΩ	≤20mΩ
Current	Current consumption	≤20μA	≤20μA	≤25μA	≤25μA	≤20μA	≤50μA
Voltage	Charging voltage	DC:54.6V CC/CV 4.2/cell
	Balance voltage for single cell	4.25±0.025V
Current	Balance Current for single cell	42±5mA
Over charge Protection	Over charge detection voltage for single cell	4.25±0.025V
	Over charge detection delay time	500mS-1500mS						customizable
	Over charge release voltage for single cell	4.15±0.05V						customizable
Over discharge prodectiom	Over discharge detection volage for singlecell	2.75±0.08V						customizable
	Over discharge detection delay time	500mS-1500mS						customizable
	Over discharge release voltage for single cell	3.0±1.0V						customizable
Over Current Protection	Over Current detection voltage	0.1±0.025V						customizable
	Release condition	Cut load,Automatic recovery
Short protection	Detection condition	Exterior short circuit
	Detection delay time	200-500uS						customizable
	Release condition	Cut load,Automatic recovery
Temperature	Operating Temperature Range	-20~+65ºC						customizable
	Storage Temperature Range	-20~+85ºC						customizable

 

Lifepo4 Product Specifications-LWS
		Product  parameters(example:LFion-13S)
		15A	25A	30A	40A	100A	200A	About yourproducts, just tellus the ratedvoltage / current or application etc ,we will help to recommend the most suitable products for you.
Current	Maxi mal continuous charging current	15A	25A	30A	40A	100A	200A
	Maxi mal continuous Discharging current	15A	25A	30A	40A	100A	200A
Over current protection	Over current detection current	80±20A	120±20A	120±20A	120±20A	300±50A	600±100A
Resistance	Protection circuitry (MOSFET)	≤20mΩ	≤20mΩ	≤20mΩ	≤20mΩ	≤20mΩ	≤20mΩ
Current	Current consumption	≤20μA	≤20μA	≤25μA	≤25μA	≤20μA	≤50μA
Voltage	Charging voltage	DC:46.8V CC/CV 3.6/cell
	Balance voltage for single cell	3.60±0.025V
Current	Balance Current for single cell	36±5mA
Over charge Protection	Over charge detection voltage for single cell	3.90±0.025V
	Over charge detection delay time	0.5S-2S						customizable
	Over charge release voltage for single cell	3.80±0.025V						customizable
Over discharge prodectiom	Over discharge detection volage for singlecell	2.00±0.05V						customizable
	Over discharge detection delay time	10mS-200mS						customizable
	Over discharge release voltage for single cell	2.50±0.05V						customizable
Over Current Protection	Over Current detection voltage	0.10±0.015V						customizable
	Release condition	Cut load,Automatic recovery
Short protection	Detection condition	Exterior short circuit
	Detection delay time	200-500uS						customizable
	Release condition	Cut load,Automatic recovery
Temperature	Operating Temperature Range	-40~+65ºC						customizable
	Storage Temperature Range	-40~+125ºC						customizable

 

LWS is a famous Smart 3S 4S 7A protection circuit module for 11.1V 14.8V Li-ion BMS manufacturers and suppliers in China. We are proud of the products made in China. Our products are both customized and high quality. Besides, we have our own brands and we also have CE certification. You can buy Smart 3S 4S 7A protection circuit module for 11.1V 14.8V Li-ion BMS with reasonable price from our factory. If you are interested in our products, we will provide you price list and quotation.

First step: connect the B-to the battery negative terminal (the B-needs to be welded the stub first).and then connect the cables (before connecting the cablesremove the cables from the bms)

Second step: start wiring from B-B-is connected to the battery total negative terminal(will say this name to number 1 ). The sideline B1 is connected to the positive of number 1 battery.the third line B2 is connected to the positive of number 2 batterv.the fourth line B3 is connected tothe positive of number 3 battery and so on.

Third step: After the cables wired,test the voltage what between each two adjacent lines from the first one,the voltage of Li-ion battery should be less than 4Vthe voltage of LFP battery should be less than 3.5V.After checking.insert the line.

Fourth step: And then connect the negative terminal of charger and of load to P-/C-B-and P-/C- should be wiring with bold cableThe wiring method requires the order must to be correct.
 

 

FAQ
Q: How do I judge what material my battery is ?
A: Please take a look at the battery body.if the normal voltage of your battery shows as 3.2V,the battery will be LiFePo4.If the normal voltage of your battery shows as 3.6V or 3.7V, the battery will be Li-ion or Li-polymer battery. you can also ask battery manufacturer the material of battery.

Q: who are we?
A: We are based in Guangdong, China, start from 2013.
There are total about 40 employees in our company.
 

Q:How can we guarantee quality?
A: Always a pre-production sample before mass production;
Always final Inspection before shipment;

Q:.what can you buy from us?
A:Battery Pack BMS,Lifepo4/Lithium Ion PCM,Protection Circuit Board,Print Circuit Board,
Lifepo4/Lithium Ion Battery Pack.

Q:. why should you buy from us not from other suppliers?
A:The company has advanced production equipment and comfortable office environment,
employees hundreds of people. The company Has a complete, scientific quality management system,
and the importance of quality and environmental philosophy.

Q: what services can we provide?
A:Accepted Delivery Terms: FOB,EXW;
Accepted Payment Currency:USD,CNY;
Accepted Payment Type: T/T,PayPal,Western Union,Cash;
Language Spoken:English,Chinese


About your products, just tell us the relative voltage/ cells/ current A or equipment etc,we will help to recommend the most suitable products for you.