3s 4s 70A BMS for 14.4V 14.8V Li-ion/Lithium/Li-Polymer 12V 12.8V LiFePO4 Battery Pack with Smbus Protocol and Bluetooth (PCM-L04S70-E71)

• Metal Coating: Copper
• Mode of Production: SMT
• Layers: Multilayer
• Base Material: FR-4
• Certification: RoHS, CCC, ISO
• Customized: Customized
• Model NO.: PCM-L04S70-E71
• Condition: New
• Specified Types: 3-4s Li-ion/Li-Polymer/LiFePO4 Battery
• L-Ion/Li-Polymer Charging Voltage: 12.6V~16.8V
• LiFePO4 Charging Voltage: 10.8V~14.4V
• Max. Continuous Charging Current: 70A(Max)
• Maximal Continuous Discharging Current: 70A(Max)
• Discharge Overcurrent Protection: 300±50A(Can Adjust)
• Colour of PCM: Green
• Balance: Yes
• Warranty: 12 Months
• Transport Package: Antistatic Bag /White Box and Standard Export Cart
• Specification: L150*W90*T10mm
• Trademark: QUAWIN/OEM
• Origin: China Guangdong
• HS Code: 8507909000
• Production Capacity: 500000/Month

Product Description

Technical parameter

Product name:Protection Circuit Module
Model No:PCM-L04S70-E71
For 3S~4S Lithium-ion/Lithium Polymer/LiFePO4 Battery Packs
Product Feature:
1. Suitable for 3~4 section Lithium-ion/Lithium Polymer/LiFePO4 Battery Packs; 
2. Maximum continuous working current 70A, same interface for charging/discharging; 
3. Overcharge, overdischarge, short circuit, overcurrent, temperature protection, etc.;
4. Ti BQ4050/BQ40Z50 is adopted,Can read voltage, capacity, current, temperature, cycle times and other parameters;
5. Through the PCM-LCD001-415 display screen, the required information can be read;
6. Support SMBus protocols;

Items			Specifications
			Lithium-ion/Lithium Polymer	LiFePO4
Communication Interface			SMbus/Bluetooth
Capacity	Designing battery capacity (EVE 50AH 4S2P)		100Ah
	Max capacity(Battery pack)		290Ah
	Min capacity(Battery pack)		100mAh
	External capacity Indication		LCD,LED,SOC
	Gas gauge algorithm		CEDV
Voltage	Charging voltage (4S)		16.8V(4.2V/Cell)	14.4V(3.6V/Cell)
	Cell-balance window		50mV±10%
	Cell-balance release voltage		20mV±10%
	Cell-balance detection delay time		0.5~2s
Current	Balance current for single cell		66±5mA	56±5mA
	Normal operating-mode current (Gas Gauge IC)		800 uA
	SLEEP operating-mode current (Gas Gauge IC)		200 uA
	FULL SLEEP operating-mode current (Gas Gauge IC)		1 uA
	Maximal continuous charging current		70A(Max)
	Maximal continuous discharging current		70A(Max)
Over charge Protection	Over charge detection voltage		4.25±0.025V	3.80±0.05V
	Over charge detection delay time		1~2S	1~2S
	Over charge release voltage		4.05±0.05V	3.55±0.05V
Over discharge protection	Over discharge detection voltage		2.5±0.07V	2.00±0.05V
	Over discharge detection delay time		1~2S	1~2S
	Over discharge release voltage		3.0±0.1V	2.7±0.05V
Over current protection	Over current detection voltage		0.2±0.015V
	Over current detection current		300±50A(can adjust)
	Detection delay time		5~60ms
	Release condition		Cut load
Short protection	Detection condition		Exterior short circuit
	Detection delay time		200-800us
	Release condition		Cut load
Resistance	Protection  circuitry (MOSFET)B- to P-		≤20mΩ
Temperature protection	Charge temperature  protection		60ºC±5ºC
	Charge release temperature		50ºC±5ºC
	Discharge temperature  protection		65ºC±5ºC
	Discharge release temperature		55ºC±5ºC
	Operating Temperature Range		-40~+85ºC
	Storage Temperature Range		-40~+125ºC
Dimension			L150*W90*T10mm
B+:Battery+
B-:Battery-
SMBD:SMBus data line
SMBC:SMBus clock line
RT1,RT2,RT4:NTC
J5:LED power indicator interface
P+:Charge+/discharge+
P-:Charge-/discharge-