Smart BMS for 14.8V (4S) Li-ion Battery Packs

• Customization: Available
• Battery Series: 4s
• BMS Type: 14.8V Lithium Ion Battery BMS
• Model NO.: LWS-4S3A-541(4S)
• Charging Current: 3A
• Discharging Current: 3A
• Type Voltage: 3.7V/Cell
• PCM Size: L260*W6*T3mm
• Type Charging Voltage: 16.8V
• Temperature Protection: No
• Balance Function: No
• Testing Service: 100%E-Testing
• Transport Package: Anti-Static Bag Packaging/ Carton Packaging
• Specification: L260*W6*T3mm
• Trademark: LWS
• Origin: China
• HS Code: 8536300000
• Production Capacity: 50000 Pieces /Months
• Package Size: 30.00cm * 6.00cm * 5.00cm
• Package Gross Weight: 1.000kg

Product Description

1. Product Description

 BMS Product feature:

• ^{Supply OEM/ODM and custom serviceHigh quality with smart balance function
  Wholesale price}
• ^{ISO9001/ISO14001/CE/ROHS certificates}
• Fast delivery
• ^{Green product}
• ^{One year warranty}
• ^{Excellent safety performance}
•  ^{Short circuit testing passed}
• ^{Overcharge testing passed}
• ^{Over discharge testing passed}
• ^{Original imported :IC from Japan,MOS from USA,Components from Sumsang.}
•  ^{1.2m drop testing passed}
• ^{100% testing} 
• ^{Support ODM & OEM services}  About the battery BMS/PCB/PCMFunction^{_: Detect and protect the battery from over-charge  /over-dicharge / over-current short-circuit / temperature detecting protection /auotmatically voltage balance function .}Common Version : common port for charge/discharge 

Separate Version : separate port for charge/discharge

We can customize any PCB from 1S to 35S lithium batteries with different current.

3.6V 3.7V 3S/ 4S  lithium Li ion battery 18650 BMS 1.5A 2A 3A battery BMS  

If you feel that this product does not meet your requirements, you can consult our staff, you can recommend or customize the lithium battery protection board you want.

  

• Description of application effect 

    (Battery Management System) BMS can extend battery life and make battery work safely.

 

     This model can be used for solar, LED lights, Emergency lights, Digital Equipment, etc.electric scooter,e-bike,tourisr
sightseeing vehicle,electric tricycle,low speed ev,emergrncy ups,solar street light,RV&home energy storage......

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. 
 

Mode	LWS-4S3A-541(4S)
PCM Size	L260*W6*T3 mm
battery series	4S Available
working current	3A Available
Application	LED lights, Emergency lights, Digital Equipment, etc
Sample	available

Wiring:
1. First connect the B- of the BMS to the total negative pole of the battery pack;

2.The cable starts from the thin black one connecting B-, the second red wire connects the positive pole of the first string of batteries, and the next string is connected in turn to positive pole of the battery,B-,B1,B2......B4; then insert the cable into the BMS; (The maximum number of strings is 4 strings, the example picture is 4 strings) (Please weld the wires in order and avoid pseudo solder joints.)  
3. Connect Charger C-/Load P- with BMS C-/P- (Use larger size wires) 4. Connect Positive Pole: Charger C+/Load P+ with Battery Pack B+ (Use larger size wires) .

 

Shenzhen Li-ion Battery Bodyguard Technology Co.,LTD
PCM Specifications  For 14.8V(4S) Li-ion Battery Packs
Model:  LWS-4S3A-541(4S)
No.	Test   item		Criterion
1	Voltage	Charging voltage	DC:16.8V  CC/CV
		Single balanced voltage
2	Current	Balance current for single cell
		Current consumption	≤50μA
		Maximal continuous charging current	3A
		Maximal continuous Discharging current	3A
3	Over charge Protection	Overcharge detection voltage	4.25V±0.025V
		Over charge detection delay time	0.5S-1.5S
		Over charge release voltage for single cell	4.15V±0.05V
4	Over discharge protection	Over discharge detection voltage for single cell	2.70V±0.08V
		Over discharge detection delay time	50mS-150mS
		Over discharge release voltage for single cell	3.0±0.10V
5	Over current protection	Over current detection voltage	200±25mv
		Over current detection current	13±3A
		Detection delay time	5mS-15mS
		Release condition	Cut load
6	Short protection	Detection condition	Exterior short circuit
		Detection delay time	200-500us
		Release condition	Cut load
7	Resistance	Protection  circuitry(MOSFET)	≤50mΩ
8	Temperature	Operating Temperature Range	-20~+60ºC
		Storage Temperature Range	-20~+85ºC

 
2. Company Information

 

Li-ion Battery Bodyguard BMS is used for Lithium ion /LiFePo4/LTO  battery pack.

We can design it for various lithium batteries like LiFepo4, LiMn2O4, and Li-polymer etc.

The main functions : over charge protection, over discharge protection, over current protection, short-circuit protection, temperature protection etc.

According to the customer request we can develop PCM in different sizes and structures.

BMS manufactured by high quality Mos and IC imported .Keep your battery long cycle serivce life time.

 

 

3. FAQ

 

5. FAQ

1.after sales services
2.OEM,ODM,Customized Design
3.We can provide 24 hours service for you. We pride ourselves on our ability to custom tailor programs around our customers'needs.
We take time to listen to your unique business needs and then set out to surpass them .
Payment Term:L/C,T/T,Paypal
Can provide variouse capacity and size is per your requirements.

Packaging & Shipping
Packing: Inner packing:Vaccum packing/Plastic bag.
Outer packing:Standard carton packing or packing per customer's requirements.
Delivery type:by air such as TNT,UPS,FEDEX or by sea ,just depend on your convenient.
Payment:L/C,T/T,Western Union,PAYPAL etc.

1. who are we?
We are based in Guangdong, China, start from 2013,sell to Domestic Market(50.00%),Southeast Asia(8.00%),Eastern Europe(5.00%),Mid East(5.00%),Western Europe(5.00%),Northern Europe(5.00%),Southern Europe(5.00%),North America(3.00%),South America(3.00%),Oceania(3.00%),Eastern Asia(3.00%),Central America(2.00%),South Asia(2.00%),Africa(00.00%). There are total about 11-50 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

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

4. why should you buy from us not from other suppliers?
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

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

^{_{Which Battery BMS for which Application?}}

Just tell us the relative voltage/ cells/ current A or equipment information etc,
We will be confident to choose the most suitbable BMS to meet your requirements.
 

Any further questions, Welcome to contact our sales person by sending inquiry .
Your satisfaction is our pleasure.  Let's Join hands for mutual Benefits!