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