Square Plate PCB Services 4s 2A~6A BMS 16.8V Lithium Battery Protection Circuit Board

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Shenzhen Li-ion Battery Bodyguard Technology Co., Limited

VIP   Audited Supplier 7 years
Profile Certified by SGS/BV
LWS-4s8a-448-RO1
BMS Li-ion 7s10A Battery PCM
6A
4.25V
2.7V
Lithium Battery Packs, LiFePO4 etc
Digital Equipment, Power Tool, Electrice
SMT
Multilayer
Fr-4
Customized
New
7-15 Days After Payment for Small Order
lws
in: Vacuum Packing/out: Packing: Carton Packing
L36*W36*T2.4mm
Shenzhen, Guangdong
8536300000
Product Description

1. About the bms 
Function:
Detect and protect the battery from over-charge  ,over-dicharge, over-current short-circuit temperature detecting protection  and auotmatically voltage balance function . Build with high end electronic components (High End IC and MOSFET ) ,simple structure design will let it have more stable quality working performance , Flexible application ( it can be used for less series battery by leaving some connection pins at empty status ),full set of protection measures let it works well without any infulence from external unexpected accidents.Please consult the salesman for specific parameters.

Description:
The protection plate is a semi-finished product, which needs to be used in combination with the battery. Before use, please make sure that the battery is in good consistency (internal resistance voltage multiplying ratio). This product contains technical knowledge. Once installed incorrectly, it will lead to board burning, tube bursting and other situations. Please explain in detail before installation. Novice buyers should install it under the technical guidance.
2.Wiring Diagram

 The wiring must be in the form of low to high analogy, If the connection sequence is wrong, the wrong voltage will double. If the balance is turned on, the balance will burn out. The light one can be repaired, and the serious one will be scrapped directly.
3.Specification

PCM Specifications  For 14.8V (4SLi-ion Battery Packs
LWS-4s8a-448-RO1
No.Test   itemCriterion
1VoltageCharging voltageDC: 16.8V  4.2v/cell
Balance voltage for single cell/
2CurrentBalance current for single cell/
Current consumption ≤50μA
Maximal continuous charging current6A
Maximal continuous Discharging current6A
3Over charge ProtectionOver charge detection voltage for single cell4.25±0.025V
Over charge detection delay time0.5S-1.5S
Over charge release voltage for single cell4.05±0.05V
4Over discharge protectionOver discharge detection voltage for single cell2.750±0.062V
Over discharge detection delay time0.5S-1.5S
Over discharge release voltage for single cell3.0±0.062V
5Over current protectionOver current detection voltage0.15±0.03V
Over current detection current20±3A
Detection delay time  5ms-15ms
Release conditioncut load 
6Short protectionDetection conditionExterior short circuit
Detection delay time200-500us
Release conditioncut load
7ResistanceProtection  circuitry(MOSFET)20mΩ
8TemperatureOperating Temperature Range-40~+65ºC
Storage Temperature Range-40~+125ºC

Only as a general reference parameter. If you have special requirements for some parameters, please contact the service personnel, and we will send the new specifications according to your requirements.

3.Company information
Shenzhen Li-ion Battery Bodyguard Technology Co.,Ltd was founded in 2013.
Mainly provide Battery PCM & BMS for Lithium ion ,Lifepo4 ,LTO battery pack.

Since 2013, the company has more than 400 types of hardware PCM/BMS,and software BMS including  HDQ/12C/SMBUS/RS482/RS232 & Bluetooth and so on. Mainly covers battery assembly 1S-35S in series ,working current up to 350A;the products are widely used in solar street lamp,golf ,LED light,power tool,electric bicycle,medical equipment,EV application......etc.

(Widely used)



4.Transportaion

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 ,Bank ,etc.

5.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: Can I use this protection circuit board for my battery?
A: Can use this protection circuit board, or not?
There are 2 questions:
How much cells in series is your battery pack?
The protection circuit board you need to buy must be same cells in series as your battery pack.

What material is your battery?

Only the LiFePo4 battery has different electric parameter from other battery, so if you need buy the protection circuit board for LiFePo4 battery , Please let us know firstly.

Q: Do we need cell balance or not?
A: The function of balance : Since battery is made of many pcs of cells in parallel and in series, the cells can't be the same as no two people in the world is the same , so can only put in group with similar performance is not without balance function

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 as per your requirements,Also ODM / OEM is welcome.

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.

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