| Troubleshooting: |
|
|
| Fault phenomenon |
Fault check and cause |
The solution |
| Unable to charge |
Measuring the voltage of 4 groups of batteries.
when 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.
when 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 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 |