Hi,
Ive done the usual and converted a 500W ATX power supply with the intention of running 2 x Turnigy Accucel 6's.
Heres my issues, any help would be appreciated.
Ive got two 12v outputs. The power supply has 2 x 12v rails each capable of 20A with a combined 406W max output. The power supply works fine UNTIL I charge a 6S 5000mah pack. It will not charge above 2.2Amps. When you begin the charging cycle it climbs to 2.2Amps and sits there perfectly (Cells at 3.6v approx). If I charge a 4S 3600 pack I can get it to go above 2.2A (Up to 3.6 I have seen eben though its almost charged). It does this regardless of using balance, normal or quick charge settings.
The output of the power supply during charge shows 11.6V. Im using a 10W 15 ohm power resistor on the RED 5.5v line to provide load and (what I thought) would bring the voltage up.
Ive also connected the brown 3.3sense wire to the orange 3.3v bundle. It seems even if I disconnect this theres no change to the operation of the supply.
Am I doing something wrong.
I thought by splitting the 12v output might be causing an issue but if i connect both rails I still only get 2.2Amp output on the 6s pack ??????
I cant figure this out, what am I doing wrong that wont allow me to draw 5 amps from the supply or is it the charger ? Looking through the Accucel manual I cant see anything Im doing wrong.