Lws 4s 4A 14.8V BMS for E-Bike

Product Details
Customization: Available
BMS Type: 14.8V Li-ion/Lithium Ion/LiFePO4 Battery BMS
Charging Current: 4A
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  • Lws 4s 4A 14.8V BMS for E-Bike
  • Lws 4s 4A 14.8V BMS for E-Bike
  • Lws 4s 4A 14.8V BMS for E-Bike
  • Lws 4s 4A 14.8V BMS for E-Bike
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Basic Info.

Model NO.
LWS-4S4A-049(4S)
Discharging Current
4A
Type Voltage
14.8V
Type Charging Voltage
DC:16.8V Cc/CV
PCM Size
L48*W14*T4mm
Balance Current
No
Balance Voltage
No
Short Circuit Protection Function
Cut Load
Over Current Protection
10±2A
Over Charge Protection
4.35V±0.025V
Over Discharge Protection
2.40V±0.08V
Temperature Protection
No
Dielectric
Fr-4
Application
Consumer Electronics
Transport Package
Anti-Static Bag Packaging/ Carton Packaging
Specification
L279*W200*T38mm
Trademark
LWS
Origin
China
HS Code
8536300000
Production Capacity
50000 Pieces /Months

Packaging & Delivery

Package Size
10.00cm * 5.00cm * 3.00cm
Package Gross Weight
1.000kg

Product Description

1. Product Description
Lws 4s 4A 14.8V BMS for E-Bike


 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......
Lws 4s 4A 14.8V BMS for E-Bike
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. 
Lws 4s 4A 14.8V BMS for E-Bike
Mode LWS-4S4A-049(4S)
PCM Size L48*W14*T4 mm
battery series 4S Available
working current 4A Available
Application LED lights, Emergency lights, Digital Equipment, etc
Sample available
 
Lws 4s 4A 14.8V BMS for E-Bike
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-049(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 4.35V±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 2.40V±0.08V
Over discharge detection delay time 0.5S-1.5S
Over discharge release voltage for single cell 3.0±0.10V
5 Over current protection Over current detection voltage 150±25mv
Over current detection current 10±2A
Detection delay time   5ms-15ms
Release condition Cut load
6 Short protection Detection condition Exterior short circuit
Detection delay time 100-500us
Release condition Cut load
7 Resistance Protection  circuitry(MOSFET) ≤50mΩ
8 Temperature Operating Temperature Range -40~+85ºC
Storage Temperature Range -40~+125ºC
Lws 4s 4A 14.8V BMS for E-BikeLws 4s 4A 14.8V BMS for E-Bike
Lws 4s 4A 14.8V BMS for E-Bike
Lws 4s 4A 14.8V BMS for E-Bike
Lws 4s 4A 14.8V BMS for E-Bike
Lws 4s 4A 14.8V BMS for E-Bike
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.

5  Reasons to Work  with Li-ion Battery Bodyguard :

1.COMPLETE SOLUTION:

We are an End-to-End Solution Provider; so we offer you a complete system solution! Being able to offer the complete solution we save you the hassle of having to search for additional suppliers. From design to supply, we are with you every step of the way!

2. INNOVATIVE PRODUCTS:

We take pride in being original, so we have an exclusive range of products for our clients. These unique products and innovation ensure you stay at the front of an everchanging market. 

3. TECHNICAL SUPPORT:

Our support doesn't stop once you invest in our products; with our experienced and skilled technical team we assist you even after sale. If you have any questions about your System or Products purchased, our technical team have the answers.

4. PERSONALISED TRAINING:

Our qualified team of experts are readily available to provide A-level class training to your team. Thus, ensuring you remain up to date with the latest bms technologies, safety and testing.

5. QUALITY CONTROL:

With our in-house quality control team and state of the art facilities, we ensure the delivery of a unique product that meets and goes beyond your expectations. 


 

 

 

3. 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.

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