7s 20A PCM BMS for 24V 25.2V 25.9V Li-ion/Lithium/ Li-Polymer 21V 22.4V LiFePO4 Battery Pack with Smbus Protocol and Ntc (PCM-L07S20-F31)

Product name:Protection Circuit Module
Model No:PCM-L07S20-F31
For 7S Lithium-ion/Lithium Polymer/LiFePO4 Battery Packs
Product Feature:
1. Suitable for 7 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 BQ4080/BQ40Z80 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
Capacity	Designing battery capacity(7S4P)		20Ah
	Max capacity(Battery pack)		29000mAh
	Min capacity(Battery pack)		500mAh
	External capacity Indication		LED
	Gas gauge algorithm		CEDV
Voltage	Charging voltage (7S)		CC/CV:29.4V(4.2V/Cell)	CC/CV:25.2V(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		66mA±5mA	56mA±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		20A
	Maximal continuous discharging current		20A
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		50±10A(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			L216*W108*T6mm
B+:Battery+
B-:Battery-
SDA:SMBUS data line
SCL:SMBUS clock line
RT1:NTC
P+:Charge+/discharge+
P-:Charge-/discharge-