Rene/Meissner EMF Higher Voltage Charger Variant

[SkyWatcher123]

Hi all, Hi seychelles, thanks for the reply.
I don't have any ultracapacitors at the moment, though i will try and get some.

I made a charge/load test with the 20 volt input, changing a couple things and the efficiency as expected, is higher.

I will make 2 more charge/ discharge load tests and take the average efficiency, to be sure of the data.

I am discharging with the 7 watt - 12 volt led bulb, for one hour.

Am also charging the lithium-ion pack to 12.60 volts in all these tests.

Here is the latest 5.0 version rene/aum battery charging circuit.

Comments or questions welcome.
peace love light

[seychelles]

HI SKY, WHAT IS THE PART NUMBER FOR YOUR BOOST CONVERTOR PLEASE..

[gyulasun]

Hi SkyWatcher,

Thanks for the measurements. 
To understand a little better the charge / discharge process for the Li pack, it would be good to know the start and end voltages of the Li pack.  Also, the discharge current your 7 W, 12 V LED bulb takes from the pack surely gets reduced as the pack loses charge in the load test,  this means revisiting the overal consumption if you have not considered this,  I do not know.  Maybe you occasionally monitor the discharge current too.

Gyula

[SkyWatcher123]

Hi seychelles, It's a 600 watt boost converter, Says on board.
DC-DC-01
QS-HD-2015-01
I can't seem to find the exact model on the net anymore, bought it from banggood.

Hi gyulasun, The end voltage under discharge was around 11.32 volt range and exactly 12.60 volts is peak charge in testing.
It's a 1 hour discharge, i check current and voltage at start, middle and end, then convert each meaurement to watts and add all 3 and then divide by 3 to get average watts used.
I do the same with the input volts and current from boost converter.

I just finished 2 more charge/discharge load tests, then added all 3 efficiency results and divided by 3 to get average efficiency.
The average efficiency of this charging circuit is 108%
peace love light

[SkyWatcher123]

Hi all, have observed something odd.
I checked the total ohm resistance of my 12 strand, parallel wired, 24 awg. magnet wire coil and 2 different meters show 1.1 ohms.
I then separated the strands and each strand measured 3.5 ohms.
I then soldered all 12 strands together, to be sure they were all making good parallel contact and still the meters show 1.1 ohms.

The formula for parallel resistance claculates to around .291 ohms.
I'm not sure what is going on, anyone have any ideas, thanks. 
peace love light