Imhotep's Lab Interactive FAQ

Here is my latest circuit which help me charge two nicad in series in under one hour, 12V under 6 hour.

Performance data charging two 1.2V nicad (1000mAh):
Input: 0.7A @ 10.4V = 7.28watt
Output: 0.45A @ 3.2V = 1.44watt (at full battery)
Efficiency: 19%

Performance data charging one 12V gel SLA (7Ah/20hr):
Input: 0.62A @ 10.5V = 6.51watt
Output: 0.24A @ 13.1V = 3.14watt(initial voltage raising before going down)
Efficiency: 48%




I also have cap dumping circuit version. But I will avoid using it since it make my 12V battery store only voltage and make the nicad heat up, both are the sign of non pure radiant. Maybe because my capacitor is electrolyte version.

Try charging more cells in parallel for higher eff.,
SIMPLE Bedini machines have reached much higher
COP's with conditioned batteries. Presumably, the
radiant energy can charge around 4X more batteries
(in voltage ratings) than the drive voltage, with no
reduction in charge rate (time).

I have gotten preliminary results that were very good, I'll post the link.

Notice that my circuit efficiency actually increase when the load has higher voltage. I would think the opposite, more battery in series will improve efficiency.

For charging time I do notice that when I charge at 1Amp output for nicad it get faster but make the battery hot, it also make 12V battery hot too at 250mA.

I am now using 10K ohm at the base to charge nicad at two hour. I am not counting effciency now, just trying to make the battery has improved capacity. So far as long as the charging do not heat up the battery, it would have good capacity.

Any Updates SucY?