Battery cycle times

[Branch Gordon]

Oh and here is my COP Calc Spreadsheet for this current set of runs: Spreadsheet

The first couple runs I was sleeping and didn't catch it in time and it charged up to 15.5V. I have a good idea of the charge time now so I can get it stopped at 15.3V

[Branch Gordon]

Nice! I get the fastest RPM (347) with the coil very close to the magnets. It's around 1/8". My final resistance is at 32 ohms...that's exactly the point where my machine switches gears.

Here is a photo of my current charge curve that's almost done. You can see that it will be an improvement over the last one...this one may put me at a 1.0 battery COP... Each of the sharp lines in the curves are where I pause the curve and change out the primary battery when it's runs down.

Also, I kinda hijacked this thread. Sorry to who started it. Tom, we maybe should move this convo back over the my "Branch's SSG Build" thread. Up to you...

Thanks again!

system for this set of runs with same kit as Branch:

21 inch rim- 16 ceramic mags- 4 TEK kit, 4x20/1x23 coil 130 FT w/welding rod core, 470 ohm base resistance, no pot, final resistor will be adjusted to have the unit pull 580 MA, no fuse simple circuit. 2 7AH yuasa batteries pulled from a old backup power supply. CBA 4 for load testing. both batts charged on a 1AU and are now being cycled on the CBA to determine true capacity. 80% D.O.D. will be discharged to 12.2 at C20

[Tom C]

Hi Tom,
No problem there. I am gathering supplies to make a cap pulser after my basic bike build. I will charge and discharge both batteries, taking measurements during each cycle. I suppose it is not even necessary to have the SG in the loop during this conditioning process? (although probably not as fun or informative). So my plan for this conditioning process would be to cycle each battery from the run mode to the external recharger at least 10 times, while taking load measurements along the way. Also during this conditioning process I understand according to the SG basic build that the collapsing field should not be allowed to discharge back into my run battery. Therefore a temporary way of channeling the radiant discharge (through a series of neon lamps, etc) is necessary during this process. - any thoughts or recommendations?

just build the circuit as described in the beginners book. do not channel anything anywhere. cycle both your new batteries on a standard charger to form them. when the capacity increase tapers off on both batteries then you can begin your SG runs. BOTH batteries on the standard charger to finish forming them. if after a few runs on the standard charger the capacity does not go up, then your batts were fully formed at the factory..... ok have fun!

Tom C

[Tom C]

system for this set of runs with same kit as Branch:

21 inch rim- 16 ceramic mags- 4 TEK kit, 4x20/1x23 coil 130 FT w/welding rod core, 470 ohm base resistance, no pot, final resistor will be adjusted to have the unit pull 580 MA, no fuse simple circuit. 2 7AH yuasa batteries pulled from a old backup power supply. CBA 4 for load testing. both batts charged on a 1AU and are now being cycled on the CBA to determine true capacity. 80% D.O.D. will be discharged to 12.2 at C20

[kennygee]

this is per John B you cannot cycle batteries back to front without a cap pulser or comparator on the charge side. yes you need a battery charger for the basic SG experimentation.

Hi Tom,
No problem there. I am gathering supplies to make a cap pulser after my basic bike build. I will charge and discharge both batteries, taking measurements during each cycle. I suppose it is not even necessary to have the SG in the loop during this conditioning process? (although probably not as fun or informative). So my plan for this conditioning process would be to cycle each battery from the run mode to the external recharger at least 10 times, while taking load measurements along the way. Also during this conditioning process I understand according to the SG basic build that the collapsing field should not be allowed to discharge back into my run battery. Therefore a temporary way of channeling the radiant discharge (through a series of neon lamps, etc) is necessary during this process. - any thoughts or recommendations?

[Branch Gordon]

Thx Tom for you help. Anxious to see your results with your board.

I will do a set of runs on my 4 tek and see what I come up with. I have some 7 AH werker batts that will work fine for this.

[Branch Gordon]

Yes they are 470 ohms.

I understand what you are saying, something is not right here what is your base resistance currently at? 470?
Tom C

[Tom C]

I will do a set of runs on my 4 tek and see what I come up with. I have some 7 AH werker batts that will work fine for this.

[Tom C]

I understand what you are saying, something is not right here what is your base resistance currently at? 470?
Tom C

[Branch Gordon]

Also, you are talking battery COP. Yeah i was getting a BATTERY COP of 2 with that kit, but i wasnt getting 1:1 charging. My SYSTEM COP was like .67 or something...cant remember but it was never over 1. In order to be at 1:1 i need a system COP of 1.

are you using the cop calculator from the yahoo groups? your machine there on runs 21 to 30 was cop over 2....

Tom C

[Branch Gordon]

Yes I am using the yahoo group COP spreadsheet. I have from the beginning.

When I was on the Yahoo groups i was using the 3pm kit with neos. I dont use that anymore. I have my bike wheel. I know u answer a lot of posts so u may not recall any details on my current build. Its a bike wheel with ceramics, teslagenx coil and board, etc. Standard build.

are you using the cop calculator from the yahoo groups? your machine there on runs 21 to 30 was cop over 2....

Tom C

[Tom C]

are you using the cop calculator from the yahoo groups? your machine there on runs 21 to 30 was cop over 2....

Tom C

[Branch Gordon]

Haha oops...yes I meant you Tom. Yes I have load tested both my batteries. They are 14AH. I am only discharging them down to 12.24V so that I don't exceed the minimum OCV recommended by the manfacturer, which is 12.44V.

My last test run, my charge input amps were 10.67, and my load output amp hours were 9.59. So I'm sitting at around .90 Battery COP with these mostly unconditioned batteries.

But the primary draw amps are what is running my primary sound so fast. It takes 580mA to run this machine, and it's putting out 200mA. The only way I could get 1:1 charging with unconditioned batteries is if my primary draw amps are lower than my charge input amps (as far as I know).

I assume you are talking to me, if not John K can step in here. if you have a 5 amp hr primary and a 5 amp hr secondary it should not take you 25 amps to charge a 5 amp battery. that is correct. So I assume you have load tested both batteries and know there capacity, yes?

Tom C

[Tom C]

I assume you are talking to me, if not John K can step in here. if you have a 5 amp hr primary and a 5 amp hr secondary it should not take you 25 amps to charge a 5 amp battery. that is correct. So I assume you have load tested both batteries and know there capacity, yes?

Tom C

John,

It currently takes me 5 charges of my primary battery to fully charge my charge battery with the SG. I was under the impression that this would improve as the charge battery was conditioned. Are you saying that if my batteries have been formed correctly, that I should get 1:1 charging right off the bat if I have everything built and tuned correctly?

You have seen photos of my build, and I have built if exactly like the book...also made all the improvements you guys have suggested.

[Tom C]

So, I cannot cycle my charge battery to the run battery and vice versa? and I need to invest in a battery charger to perpetuate my system?

this is per John B you cannot cycle batteries back to front without a cap pulser or comparator on the charge side. yes you need a battery charger for the basic SG experimentation.