Here is an excerpt from our DIY kit guidelines:
"Modifying the charger:
The charger has an automatic shut-off circuit board integrated in the charger itself. During charging, the BMS will shut-off charging if any cell is being overcharged (greater than 3.85V~3.95V), and once the cell voltage falls below the shut-off (aka recovery voltage) voltage, the BMS will allow charging to resume. Without the modification, when the BMS ‘tells’ the charger to turn off, the charger will turn off, but when the BMS ‘tells’ the charger to resume charging, the charger will remain off and will need to be disconnected from the battery and disconnected from the power source in order to reset itself to resume charging.
Modifying the charger will allow the charger and BMS to work together. The charger will charge, the BMS will ‘tell’ the charger to turn off, the charger will turn off, the BMS will allow the charger to resume charging, and the charger will then turn back on without having to reset it by unplugging from the battery or from the wall or other power source. This will also allow the BMS to properly perform the balancing function.
Remove the top two outside corner screws from the end plates of the charger and remove the top lid. There is a small circuit board that is located near the charger output, the fuse and the LED side. It is perpendicular to the main PCB and is connected with a 5 pin connector. This is what needs to be removed for the mod. The pins can be cut (be sure not to damage any of the other components), or, this is the method that I prefer to use, very carefully wiggle the circuit board back and forth being sure not to cut/wear through the existing wire insulation or from damaging other components and it will break off.
Once this is removed, replace the cover, and screws and the charger is ready to go!"
This is the ONLY
modification to the chargers that we allow and still honor the warranty, and as long as no other components were damaged while performing the mod, the warranty will be valid. Any adjustments of the pots will void
Haven't opened the charger...Might violate some sort of rule, regulation or policy or something.
...Makes me wonder why the charger was shipped set to 220 volts and the PCB thing is still in the way....
We modify the charger and change the switch from 220Vin to 115Vin when we build the battery pack to ensure the charger and battery pack function together and properly before shipping, unless of course it is going to a country that has a 220V grid, then we leave it at the 220Vin. The modification 'procedure' is sent out with our DIY kits, but that is as far as it goes (went). Other than that, we really do not know how the charger is being used so we leave the charger 'as is' just as it was shipped to us.
Due to your post, we are now sending out this modification with all of our chargers that are over 1S, along with a reminder about checking the correct Vin switch depending on the power grid for chargers greater than 600W. All other chargers have automatic detection. So thank-you for letting us know a better way to assist the customers!
As for the smell on the spacer blocks, that is how we received them from Headway China, so not sure what had happened, but we will do a better job in the future.
I apologize about missing your calls yesterday, large shipments came in and we were pretty tied up with inventory. Great talking with you and walking you through this on the phone this morning.