3s 4s 20A BMS for 14.4V 14.8V Li-ion/Lithium/Li-Polymer 12V 12.8V LiFePO4 Battery Pack with Smbus Protocol and Bluetooth (PCM-L04S20-E22)

Product name:Protection Circuit Module
Model No:PCM-L04S20-E22
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 20A, 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;

No.	Test   item(Test at normal temperature 25±2ºC )		Criterion
1	Communication Interface		SMBus
2	Capacity	Designing battery capacity(PCM)	12Ah
		Max capacity(Battery pack)	290Ah
		Min capacity(Battery pack)	100mAh
		External capacity Indication	LED,LCD
		Gas gauge algorithm	CEDV
3	Voltage	Charging voltage(4S)	DC:16.8V  CC/CV(4.2v/Cell)
4	Balance	Cell-balance window	100mv
		Balance Resistance	100R
		CCC Voltage threshold	3.27V
5	Supply Current	Normal mode(Firmware running, no flash writes)	500uA
		Sleep mode	100uA
		Shutdown mode	1uA
		Maximal continuous charging current	20A(Max)
		Maximal continuous discharging current	20A(Max)
6	Over-charge Protection (single cell)	Over-charge detection voltage	4.25±0.05V
		Over-charge detection delay time	1S
		Over-charge release voltage	4.05±0.05V
7	Over-discharge protection (single cell)	Over-discharge detection voltage	2.50±0.05V
		Over-discharge detection delay time	1S
		Over-discharge release voltage	3.00±0.05V
9	Short protection	Detection condition	Exterior short circuit
		Short protection Current	50±10A
		Discharge short-circuiting detection delay time	200-800us
		Release condition	Cut load
10	Resistance	Protection  circuitry	≤40mΩ
11	Temperature protection	Charge temperature(1st Level Safety)	55ºC
		Charge temperature detection delay time (1st Level Safety)	2s
		Charge release temperature(1st Level Safety)	50ºC
		Discharge temperature (1st Level Safety)	60ºC
		Discharge temperature detection delay time (1st Level Safety)	2s
		Discharge release temperature(1st Level Safety)	50ºC
		Charge temperature (2nd Level Safety)	65ºC
		Charge temperature detection delay time (2st Level Safety)	0s
		Discharge temperature(2st Level Safety)	75ºC
		Discharge temperature detection delay time (2st Level Safety)	0s
		Operating temperature	-40~+85ºC
		Functional temperature	-40~+110ºC
		Storage temperature range	-65~+150ºC
Dimension		L78*W52*T6mm
B+:Battery+
B-:Battery-
SD:SMBus data line
SC:SMBus clock line
J1:Terminals for battery voltage detection
RT1,RT2,RT4:NTC
P+:Charge+/discharge+
P-:Charge-/discharge-