Elcon Charger End voltage and other mods

ok

here is a video i made
there are a few more have a look at the rest of the videos

Elcon Charger 1500 / Tc charger 1500 with cellog BMS relays video 2 - YouTube

go a 4,7Mohm on order maybe get it this week
1 solid and 1 variable with a 1Mohm solid to go over that one.
hopefully this will work.

And a update
U did the charger endvoltage mod
It works thanks to lopes calculations
4M7 ohm over r1

-Htc Tapatalk ( sorry for auto spell correct )

Congratulations. You could have done the mod a lot earlier. It looks like in your photo you have run two wires outside the case to make it more accessible to connect a resistor without having to open the charger. Good idea. Just don't get zapped. Keep it well insulated. What is your new end voltage?

Soldering that large pad was a pain.
I am at ~259 volts i have yet to measure it during charge.

Yes 2 wire outside ;-) you see it right

Only temp. when i am happy i am going to put 12 volt on those wire and control a relay thats saver


-Htc Tapatalk ( sorry for auto spell correct )

Should set your end voltage to 70cells x 3.65v = 255.5v

You may be able to modify each one of your BMS modules to start burning power at a lower voltage value say 3.45v.

Consider sending an email to the seller and ask if you can somehow modify your BMS modules so they start burning at a lower voltage i.e. 3.45v.

Otherwise I think you are top balancing too close to 3.80v and may be overcharging your cells. Considering the accuracy of using your CellLogs which sometimes need calibration it is very risky. Generally if you cells reach 4.00v for a considerable amount of time your cells are toast. There is not much room for error.

before i got them.. during ( got some more spares ) and after i asked about that
but in non of those cases did i get any response to that question......
but yhea i was already thinking about moding the bleeding boards.

maybe i make some close up macro pics and post them here..

Maybe start a new thread and post a high resolution photo of both sides of PCB. Try to draw a electrical schematic diagram from the photo. Maybe other users who have extensive electronic knowledge will be able to help. Include the website you got it from and any info that would help.

after some testing 4.700.000 ohm is stil not good
the charger did stop but not soon enough that i wanted.
so it does work but not yet the way i want it

so i made 5Mohms but with this the charger woudl not start
the leds give me the battery disconnected message......
when i unplug it the charger starts to chagre
with the 4M7ohm the charger simply starts charging.. strange!!
so i can not add 400.000 ohms to that 4.700.000 to make 5 ( i just added 5 x 1Mohm ) because then the charger wil not except the control voltage anymore.

i geuss i have to work with 4M8 or 4M9 ohms....