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4S 40A Li-ion Lithium Battery 18650 Charger PCB BMS Protection Board with Balance For Drill Motor 14.8V 16.8V Lipo Cell Module

4.9

★★★★★

$13.99 /$17.07

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Feature:

4 string 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery)

Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery)

Product Size: 45 * 55 * 3.4mm (Standard Edition / Enhanced), 46 * 60 * 3.4mm (balanced version)

Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version)

Charging voltage: 16.8V - 18.1V

Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)

Continuous charge current (upper limit): 20A

Equalization version: suitable for starting current below 80A, power 135W below the drill.

Project	Min.	Typ.	Max.	Units
Consuming current	12	18	24	uA
Overcharged protection voltage	4.2	4.25	4.3	V
Balanced starting voltage	4.17	4.2	4.23	V
Equilibrium current	95	100	105	mA
Balanced heating power	1.56	1.72	1.91	W
Overcharge recovery voltage	4.1	4.15	4.2	V
Over-discharge protection voltage	2.4	2.5	2.6	V
Overvoltage protection after over-discharge protection	2.8	3	3.2	V
Overvoltage protection after over-discharge protection	3.2	3.5	3.8	V
Over-discharge recovery voltage	2.9	3.2	3.3	V
Conduction internal resistance	2.5	3	3.5	mu03a9
Overcurrent protection current C	70	80	90	A
Overcurrent delay time	100	150	200	ms
Continuous operating current	0	40	40	A
Continuous output power	0	672	672	W
Ambient temperature	-40	25	85	°C

Troubleshooting:

Fault phenomenon	Fault check and cause	The solution
Unable to charge	Measuring the voltage of 4 groups of batteries.	Pair the battery pack well, do not mix
	when one of the battery voltages exceeds 4.25V,	the good battery and the bad battery.
	the protection board will activate overcharge protection.
Unable to discharge	Measuring the voltage of 4 groups of batteries.	Pair the battery pack well, do not mix
	when one of the battery voltages is lower than 2.7V,	the good battery and the bad battery.
	the protection board will activate the over-discharge
	protection.
Charging/discharging	OV, 4.2V, S.4V, 12.6V, 16.8V miswired	Rewire or replace the new board
failure	OV, 4.2V, S.4V, 12.6V, 16.8V miswired	(human failure, no warranty)
Overcharge/overdischarge	OV, 4.2V, 8.4V, 12.6V, 16.8V miswired	Rewire or replace the new board
failure	OV, 4.2V, 8.4V, 12.6V, 16.8V miswired	(human failure, no warranty)
Discharge protection	Check that the battery pack has sufficient discharge	Replace the battery pack with a higher
	capability and check that the load"s starting current	discharge capacity, or a protective
	exceeds the overcurrent protection current of the	plate with a larger current
	protection board.	(super working range)
Component soldering	There is no connection between one of the components	Repair welding
Component soldering	and the PCB pad.	Repair welding
Component welding	There is a short circuit between two or more pins of the	Remove the component and re-weld
Component welding	component.	Remove the component and re-weld
Electrostatic breakdown A	In the unpowered state, measure the G, D, and S	Remove the replacement MOS tube
	poles of the MOSFET. If the forward and reverse
	resistances of any two pins are 0Q,
	it indicates that it has broken down.
Electrostatic breakdown B	Remove the MOS tube and measure the resistance	Remove the replacement MOS tube
	of the G and D, G and S poles of the MOS tube.
	If there is a resistance indicating that it has broken
	down, the resistance should be infinite.