L250.5*W70.7*T6.8mm 12.8V 4s 20A BMS for LiFePO4 Batteries

• Product Name: LiFePO4 BMS
• Usage: Lithium Battery Packs, LiFePO4 etc
• Series: 4s
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: LWS-4S20A-614(4S)
• Working Current: 20A
• Metal Coating: Copper
• Mode of Production: SMT
• Layers: Double-Layer
• Base Material: Fr-4
• Certification: RoHS, ISO
• Customized: Customized
• Condition: Used
• Transport Package: Electrostatic Bag and Carton
• Specification: L250.5*W70.7*T6.8mm
• Trademark: LWS
• Origin: China
• HS Code: 8536300000
• Package Size: 26.00cm * 8.00cm * 1.00cm
• Package Gross Weight: 0.020kg

Product Description

L250.5*W70.7*T6.8mm 12.8V 4S 20A bms for LiFePO4 batteries

Product Description

 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. 

• Supply OEM/ODM and custom service
• High quality with smart balance function
• Wholesale price
• ISO9001/ISO14001/CE/ROHS certificates
• Fast delivery

 

 About the battery BMS/PCB/PCM
 

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. 

Shenzhen Li-ion Battery Bodyguard Technology Co,.LTD
PCM Specifications For 12.8V(4S)LiFePO4 Battery Packs
Model:LWS-4S20A-614(4S) Same port
No.	Test   item		Criterion
1	Voltage	Charging voltage	DC:14.4V±0.05V CC/CV
		Balance voltage for single cell
2	Current	Balance current for single cell
		Current consumption	≤50μA
		Maximal continuous charging current	20A
		Maximal continuous Discharging current	20A
3	Over charge Protection	Over charge detection voltage for single cell	3.65±0.025V
		Over charge detection delay time	0.5S-1.5S
		Over charge release voltage for single cell	3.56±0.05V
4	Over discharge protection	Over discharge detection voltage for single cell	2.32±0.08V
		Over discharge detection delay time	10mS-150mS
		Over discharge release voltage for single cell	2.58±0.10V
5	Over current protection	Over current detection voltage	100±25mv
		Over current detection current	80±10A
		Detection delay time	5mS-15mS
		Release condition	Cut load,Automatic recovery
6	Short protection	Detection condition	Exterior short circuit
		Detection delay time	50-200us
		Release condition	Cut load,Automatic recovery
7	Resistance	Protection  circuitry(MOSFET)	≤50mΩ
8	Temperature	Operating Temperature Range	-40~+60ºC
		Storage Temperature Range	-40~+85ºC

  
Detailed Images 






Wiring:

 1. Connect Battery B- with BMS B- firstly!

 2. Connect Battery1,Battery2,Battwey3,Battery4 with the BMS as the picture shows.

(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) .

 Pay attention to make insulation.