24V 20A 7S Lithium Li-ion 18650 Battery BMS Protection Board with Balancing

$ 18.99

Features:

The protection board is for 7 series 18650 li-ion 3.6V/3.7V batteries.
Stable various protective functions for charging and discharging, such as accurate overcharge protection, over-discharge protection, over current protection and short circuit protection.
Batteries core hardware balanced processing,proper balanced current, reasonable balanced heat emitting, does not affect performance of battery pack.
It has aluminum sheet that would enhance heat dissipation for MOS tube, and extend the service life of MOS tube.
Low quiescent power consumption, it can save energy.

Specification:

Size: 65337mm / 2.561.30.27"

Wire Length: 350mm / 13.77"

Package list:

1 * Protection Board

	Minimum	Typical	Maximum	Unit	Note
Working Voltage	19.6		29.75	V	Circuit normall working range
Quiescent Current		20	50	μA	Single battery voltage 3.6V
Operating Temperature	-20		+70	℃	Normall operating temperature range
Relative Humidity			90%		No condensation
Storage Temperature	-40		+85	℃	Humidity is less than 90%, no condensation
Altitude			4000	M
Charging Voltage			29.75	V	CC-CV

Function	Test Item	Symbol	Test Condition	Minimum	Typical	Maximum	Unit
Over Charge Protection	Voltage	Vc1	At charge off	4.200	4.250	4.300	V
	Delay Time	Tc1	/	10	1000	1700	mS
	Relieve Voltage	Vc2	/	4.150	4.190	4.240	V
Charging Current	Normal	Ioc	/			20	A
Balancing Function	Start Voltage		/	4.150	4.200	4.250	V
Balancing Function	Balancing Current		/	20		35	mA
Over Discharge Protection	Voltage	Vd1	At discharge off	2.700	2.800	2.900	V
	Delay Time	Td1	/	10	200	500	mS
	Relieve Voltage	Vd2	/	2.900	3.000	3.100	V
	Recovery Condition	/	/	Disconnecting load
Over Current Portecion	Over Current 1 Protection Current	Ioc1		60		100	A
Over Current Portecion	Over Current 1 Protection Delay Time	Toc1		20		200	mS
Discharge Over Current Relieving	Over Current Protecion Recovery Condition	/	/	Disconnecting load
Discharge Current	Max. Continuous Discharge Current	Ioc	-	-	-	20	A
Short Circuit Protection	Delay Time	Tshort			300	600	μS
	Recovery	/	/	Disconnecting load
Internal Resistance	Discharge Circuit Internal Resistance(mΩ)	Ron1		/	/	20	mR
Self Power Consumption	Working Mode	Icc1		/	20	50	μA

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