A few things to consider:
1. the 350ma meanwell supply can maintain CC between 4 and 48V
The larger versions increasingly have smaller CC ranges, (33-48 for the 500ma) therefore when we connect them in higher voltage series strings for charging higher voltage packs, the pack voltage swing between discharged and full may exceed the CC range.
If more current is desired, putting the 350ma CC supplies in parallel may be a better approach than using a larger single supply.
2. I used a 12V battery fan power supply to assure that thermal issues at the end of charge would not be a factor, granted, running the fan at 6V is probably more than sufficient to keep the pack cool.
Without the fan running, the pack may develop hot spots, and cell heating could damage cells in a way that would not be immediately obvious, so my advise is to run the fan, to be safe.
I know of several people that have built first gen and second gen prius chargers using my series supply technique with good results.
I have a lot of experience with the prius cells, and can assure you that heat and internal pressure is generated even at the low 350ma current. The prius cells flat sides make a great internal pressure indicator, and will begin to bulge outward just as the cells reach 100% SOC, pointing to a simple microswitch based charge terminator.
http://www.99mpg.com/blog/batterypac...subpacks.jpg,0
