Lws Battery Management System BMS 4s 12V LiFePO4 Battery BMS

Product Description

LWS Battery Management System BMS 4s 12V LiFePO4 Battery BMS

Product Advantages:

• ^{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} 

Shenzhen Li-ion Battery Bodyguard Technology Co.,ltd
PCM Specifications  For 12.8V(4S) LiFePo4 Battery Packs
Model:LWS-4S20A-454(4S)Same Port
No.	Test   item		Criterion
1	Voltage	Charging voltage	DC:14.4V  CC/CV
		Balance voltage for single cell	3.6±0.05V
2	Current	Balance current for single cell	36±5mA
		Current consumption	≤50μA
		Max continuous charging current	20A
		Max continuous Discharging current	20A
3	Over charge Protection	Over charge detection voltage for single cell	3.65±0.025V
		Over charge detection delay time	500mS-1500mS
		Over charge release voltage for single cell	3.48±0.05V
4	Over discharge protection	Over discharge detection voltage for single cell	2.32±0.08V
		Over discharge detection delay time	500ms-1500ms
		Over discharge release voltage for single cell	2.58±0.1V
5	Over current protection	Over current detection voltage	0.1±0.025V
		Over current detection current	30±5A
		Detection delay time	500ms-1500ms
		Release condition	Cut load or Charging Activation
6	Short protection	Detection condition	Exterior short circuit
		Detection delay time	200-500us
		Release condition	Cut load or Charging Activation
7	Resistance	Protection  circuitry(MOSFET)	≤50mΩ
8	Temperature	Operating Temperature Range	-20~+70ºC
		Storage Temperature Range	-40~+125ºC
		Temperature protection	10K NTC

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.}

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5. 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, L/C,
 

Any further questions, Welcome to contact our sales person by sending inquiry .
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