7s 40A BMS for 24V 25.2V 25.9V Li-ion/Lithium/Li-Polymer 21V 22.4V LiFePO4 Battery Pack with Smbus for Ebike (PCM-L07S50-F44)

Product name:Protection Circuit Module
Model No:PCM-L07S50-F44
For 7S Lithium-ion/Lithium Polymer/LiFePO4 Battery Packs
Product Feature:
1. Suitable for 7 section Lithium-ion/Lithium Polymer/LiFePO4 Battery Packs;
2. Same charging/discharging interface, working current 40A;
3. Overcharge, overdischarge, short circuit, overcurrent, temperature protection, etc.;
4. Temperature switch detects battery temperature and controls discharge MOSFE;
5. The metering IC adopts BQ78350, which can read the parameters such as voltage, capacity, current, temperature and cycle number;
6. The required information can be read through the display screen of model PCM-LCD001-415;
7. SMBus communication protocol.

Protection Circuit Module Specifications For 21V LiFePO4 Battery Packs
No	Test   item (Test at normal temperature 25±2ºC and relative humidity≤90%)		Criterio
1	Communication Interface		SMBus
2	Capacity	Designing battery capacity(PCM)	10.40Ah
		Max capacity(Battery pack)	320Ah
		Min capacity(Battery pack)	100mAh
		External capacity Indication	LCD,LED,SOC
		Gas gauge algorithm	CEDV algorithm
3	Voltage	Charging voltage	DC: 25.2V CC/CV(3.6V/1cell)
		Cell-balance detection voltage (Charge balance)	3.6V±0.03V
		Cell-balance release voltage	3.5V±0.025V
		Cell-balance detection delay time	0.96~1.4s
4	Current	Balance current for single cell	84±5mA
		Current consumption for single cell	≤20μA
		Normal operating-mode current (Gas Gauge IC)	650 uA
		SLEEP operating-mode current (Gas Gauge IC)	300 uA
		FULL SLEEP operating-mode current (Gas Gauge IC)	0.1 uA
		Maximal continuous charging current	40A(Max)
		Maximal continuous discharging current	40A(Max)
5	Over charge Protection	Over charge detection voltage	3.900 ± 0.025 V
		Over charge detection delay time	0.5S~1.5S
		Over charge release voltage	3.600 ± 0.050 V
6	Over discharge protection	Over discharge detection voltage	2.00 ± 0.080 V
		Over discharge detection delay time	50~150ms
		Over discharge release voltage	2.70 ± 0.100 V
7	Over current protectio	Over current detection voltage	0.2±0.015V
		Over current detection current	100±20A(adjustable)
		Detection delay time	5~20ms
		Release condition	Cut load
8	Short protectio	Detection condition	Exterior short circuit
		Detection delay time	200-800us
		Release condition	Cut load
9	Resistance	Protection  circuitry  (MOSFET)	≤40mΩ
10	Temperatur	Operating Temperature Range	-40~+85ºC
		Storage Temperature Range	-40~+125ºC
Dimension		L215*W63*T15mm
B+:Battery+
B-:Battery-
SMBD:SMBus data line
SMBC:SMBus clock line
P+:discharge+
P-:discharge-
CH+:Charge+
CH-:Charge-
Communication mode:
1. RS232,RS485 Conversion board:
2. LCD  (PCM-LCD001-415)