Lws 4s 4A 14.8V Li-ion Battery BMS

• Customization: Available
• BMS Type: 12.8V Li-ion/Lithium Ion/LiFePO4 Battery BMS
• Charging Current: 4A
• Model NO.: LWS-4S4A-025
• Type Voltage: 14.8V
• Type Charging Voltage: DC:14.4V Cc/CV
• PCM Size: L60*W350*T3mm
• Short Circuit Protection Function: Cut Load
• Over Current Protection: 7.5±1A
• Over Charge Protection: 4.35V±0.025V
• Over Discharge Protection: 2.40V±0.08V
• Temperature Protection: No
• Dielectric: Fr-4
• Application: Consumer Electronics
• Testing Service: 100%E-Testing
• Transport Package: Anti-Static Bag Packaging/ Carton Packaging
• Specification: L279*W200*T38mm
• Trademark: LWS
• Origin: China
• HS Code: 8536300000
• Production Capacity: 50000 Pieces /Months
• Package Size: 10.00cm * 5.00cm * 2.00cm
• Package Gross Weight: 1.000kg

Product Description

1. Product Description

 BMS Product feature:

• ^{Supply OEM/ODM and custom service}
• ^{High 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/PCM

Function^{_: 
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 2A 3A 4A 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-4S4A-025(4S)
PCM Size	L46*W10*T4 mm
battery series	4S Available
working current	4A 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 3-4 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) .

PCM Specifications  For  14.8V(4S) Li-ion  Battery Packs
Model:LWS-4S4A-025(4S)
No.	Test   item		Criterion
1	Voltage	Charging voltage	DC:16.8V  CC/CV
		Balance voltage for single cell
2	Current	Balance current for single cell
		Current consumption	≤50μA
		Max continuous charging current	4A
		Max continuous Discharging current	4A
3	Over charge Protection	Over charge detection voltage for single cell	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	8-10A
		Detection delay time	5ms-15ms
		Release condition	Cut load,Automatic recovery
6	Short protection	Detection condition	Exterior short circuit
		Detection delay time	200-500us
		Release condition	Cut load,Automatic recovery
7	Resistance	Protection  circuitry(MOSFET)	≤40mΩ
8	Temperature	Operating Temperature Range
		Storage Temperature Range	-40~+125ºC

 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.

 

 

FAQ

 

Q:  How many Ampere protection circuit boards should choose?

A: It depends on your load power such as electric motor power please contact the sales or technical support before buying.
 

Q:  What is the distinction between same port wiring and different port wiring?

A: The cathode of charger and load is different for different port wiring , the cathode of charger and load is same for same port wiring and the charging current is equal to the discharge current. 
 

Q:  What is the distinction between balance and unbalance function?

A: Equilibrium function is that high voltage cells will be discharged with resistor, waiting for the low voltage cells , to achieve the each cell voltage is consistent , to improve the battery performance for the whole group.
 

Q: Do you have Minimum Order Requirement (MOQ)?

A: No, We don't have MOQ, Different customer have different requirement ,We can provide various capacity and size is per your requirements,Also ODM / OEM is welcome.
 

Q:  What is your term of payment?

A: PayPal, T/T,
 

^{_{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!