Charger - Adjusting the charging voltage

[Jonca]

Hi All,

Few years ago I purchased ebike charger EMC120 from BMSBattery. I dont see the exact model anymore on their Eshop but mine looks like one of these with aluminium casing: https://bmsbattery.com/18-series-c-chargers



When I purchased the charger I was able to choose the charging voltage. I needed & chose it to be for 11s, 45.something Volts. Now I would like to use this charger for 10s battery pack.
I opened the charger and see there are 3 trimmer potentiometers. Baoshi 3296. I guess by adjusting the potentiometers I could modify the charging voltage? Would anybody happen to know what exactly are each of the potentiometers doing/effecting on?



Also after opening the charger I see there is one cable hanging freely its the one coming from power cord plug(power input). Maybe some ground?

Thanks,

 

[eee291]

If I remember correctly the second ground should be screwed to one of the mosfets, not 100% sure.
The Pot where the wires exit is the one for Voltage the other two are for Amps and current cutoff when reaching full charge.

 

[Jonno]

Correct,
The left does the cutoff
The middle does the amps
The bottom right does the volts

There is no need to change the top 2 pots just the voltage.

Jonno

 

[Jonca]

Thank you both. That is helpful info for me.