Just to confirm... Meanwell s-350-24 to charge 7s lipo
- Thread starter tostino
- Start date
dnmun
1 PW
how much current was the power supply producing?
can you tell what burned up? looks like the smoke is around the base and side of one of the output caps. i have one similar if you can't read the part numbers, and you need to identify them.
can you tell what burned up? looks like the smoke is around the base and side of one of the output caps. i have one similar if you can't read the part numbers, and you need to identify them.
The left side wall, two large 3 prong components.. looks like diodes
amps were going through my anmeter, and I was seeing only a 8A draw..
Im getting a new PS, anyone want this dead one?
funny part is, before I wired my pack in series, I was charging each cell seperately.
and getting great performance..
from the 15Ah 3.3 A123 prismatic cells
I was monitoring the voltage at cell terminals, while charger was set at 3.65v
voltage would rise to approx. 3.45v and just stop rising..
continue charging for 15+ minutes before again rising to 3.65 charging level
Now as the cells are wired in series, the cell voltage will NOT pass 3.31v
- could be because Im using the CellLog 8 balancing wires to charge the cells individually..
using 3.3v 150watt PS, the amp output on a 3.2V cell is only 3 amps max.
I rarely bring the pack cells resting voltage below 3.10 volts/
amps were going through my anmeter, and I was seeing only a 8A draw..
Im getting a new PS, anyone want this dead one?
funny part is, before I wired my pack in series, I was charging each cell seperately.
and getting great performance..
from the 15Ah 3.3 A123 prismatic cells
I was monitoring the voltage at cell terminals, while charger was set at 3.65v
voltage would rise to approx. 3.45v and just stop rising..
continue charging for 15+ minutes before again rising to 3.65 charging level
Now as the cells are wired in series, the cell voltage will NOT pass 3.31v
- could be because Im using the CellLog 8 balancing wires to charge the cells individually..
using 3.3v 150watt PS, the amp output on a 3.2V cell is only 3 amps max.
I rarely bring the pack cells resting voltage below 3.10 volts/
cell_man
100 kW
I think you are already pushing your luck charging at almost 1C on a 27V charger with no BMS. Splitting the pack and charging at almost 2C is pointless. You are hitting the cells hard for no good reason and it will still take just as long to charge. There is likely excessive voltage drop on the balance wires for single cell charging, resulting in very little current reaching the cells. It will take a long time to get a 15Ah cell charged with such an undersized cable.
tostino
10 kW
If shipping is not too much, I wouldn't mind the dead PSU.
And I completely agree with cell-man, that is way too much current to put through balance wires! Really, they are designed for < 1a use.
And I completely agree with cell-man, that is way too much current to put through balance wires! Really, they are designed for < 1a use.
