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Thread: Jelloir's SG Build

  1. #21
    Senior Member jelloir's Avatar
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    Quote Originally Posted by BobZilla View Post
    Looking good James!

    I don't know how much you know about rejuvenating them but a little advice...

    If they are really sulphated they will be sluggish to take on the charge but it you get a small load like an auto bulb or something like that and just keep pulling a bit off then back to the charge, then pull a bit off then back again and so on it will start the process to where they will start to take more of a charge. It is sort of like giving them a little warm up exercise. They may top out at only 12.5 or lower and the chart goes flat, that is fine if you keep at it they will improve.

    In some ways I think it is more fun to take an old crusty battery and whip it back to life than it is to get brand new ones.
    Thanks for that Bob,

    So depending on the battery would using this bulb method be better than using the discharge function of the CBAIV. My plan was to pretty much follow Peter's Battery Rejuvenation video (except with an SSG). I totally agree about it being fun trying to rejuvenate batteries, I'm really enjoying it.

    I have been thinking how useful it would be to have a circuit that could disconnect the trigger coil when the voltage of the run battery gets low say 11V or the charge battery hits 15.2. I have looked up a few using Zener diodes etc. Forrest Mimms book has a circuit that could be adapted to this. Has anyone done this and have a schematic they could share?

    Also, it turns out my old multimeter shown in the vid is inaccurate and out by about +.16 volts depending on voltage and would fluctuate. No wonder I thought it was a joke trying to use it as my results were all wrong I have bought a nice Bryman and an Extech now.

  2. #22
    Hi James I didn't notice this post until just now...

    You could use the CBA or the bulb. There is a difference though because the CBA is a constant current but the bulb is not. I think it really depends on the battery you are working on, the bulb at first perhaps. I say that because I have brought back batteries that litterally would only hold a small load like th ebulb for 30 seconds starting out. It would not be worth setting up the CBA to do this over and over but later on when it starts responding it would make sense. Like I said i think it really will depend on the battery you are working on.

    Many of the ones I have worked on were so bad off they behaved as a complete short. The voltage will rise to 60+ volts and then back down. It is the impedance doing that. I do not just keep the charge going when this happens, I put the charge to it for only a min or two then put a load, then again, and again, and again, and so on. Eventually you free up some small portion of the plate and the impedance lowers and you get a bit longer of a load time. Doing this over and over will eventually get the battery behaving normally provided it is only sulphation and not a real shorted cell. It is just something you get a feel for after awhile.

  3. #23
    Senior Member jelloir's Avatar
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    I thought it would be fun to post some updated pics of what my SSG looks like now. It's been through countless experiments and is now settled in for a rather large Trojan 8V battery rejuvination project. It's about to get some backup from a second SSG and a Tesla charger otherwise I will be waiting a long... long time.

    I moved the Comparator so it receives the airflow of the wheel so I needn't cool the heatsink with a separate fan, works really well.

    rejuvinator.jpg

    trojan8.jpg

    James
    Last edited by jelloir; 11-09-2014 at 06:28 AM.

  4. #24
    hi jelloir

    i see you have a nice bunch of batterys there to do

    maybe you can try our trick to speed it up a few notches
    discharge them slowly whilst under charge. c20 ratio
    we noticed here on all batterys we did so far that this speeds up the process. and i would like to see others try this method.
    i know its against all common sense and do it at own risk but we have the results to show
    you will notice on bad sulfated batterys that the beginning is slow going but at a sudden moment you will see a point where voltage at the battery starts to climb again under discharge.
    our current battery witch is chowing this effect is a traction battery witch was not able to climb above 13 volt and we discharge it to 11.2 ( value under discharge at the wheel) volt for now
    we notice every discharge that the battery drops to 11.25 and then climbs back to 11.3 verry slowly.
    but every time lasts longer and longer and accid levels are rising in the battery ( gravimetrick measurment)
    every cicle charged voltage goes up a bit (now at 13.55)

    kind regards
    stef

  5. #25
    it is not wise to charge and discharge at same time NOTHING WILL KILL A BATTERY FASTER , one should not right a rule book on the behavior of one battery just saying

    https://www.youtube.com/watch?v=K4__eH9-MXk
    Last edited by guyzzemf; 11-12-2014 at 02:20 AM.

  6. #26
    Senior Member jelloir's Avatar
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    Thanks Stef, In one of JB's EFV DVD's he talks about car batteries being charged and discharged at the same time. It makes the battery shed lead... not good. I'm just following Peter Lindemann Battery Secrets and Battery Rejuvination and advise from users on the forum about taking a little out, charge some more, take a little out, charge more.

    Thanks

  7. #27
    Senior Member jelloir's Avatar
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    I built my second SSG a couple of weeks back. It's the bigger brother of my existing SSG. The frame is slightly larger and fitted out with the classic SSG specs, 26" steel rim x 21 magnets, Teslagenx board but with a 9 filar coil from http://www.aussiecoils.com to use all 8 Transistors. Some good news is that I got 1:1 in gen mode, hurray!!!, but in radiant mode it still eludes me I'm really starting to think the batteries I bought for testing are garbage. I'll probably do some more COP testing in a few weeks and might post a youtube vid.

    So here they are working on some 12V Trojan's, Big Woody is taking a rest at the moment while I pull some energy out of it's charge battery. More good news is that these 12V Trojan's are coming good! I can now top 2 of them on my TST5 after having pummled them with my Comparator and Radiant charging. The other 2 haven't been in the rejunation cycle that long but I'm sure they will come good as well.

    rejuvinators.jpg
    thelads.jpg
    Last edited by jelloir; 12-14-2014 at 05:39 AM.

  8. #28
    Senior Member Branch Gordon's Avatar
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    Great looking build man! What AWG wire do you have on your new coil?

    Quote Originally Posted by jelloir View Post
    I built my second SSG a couple of weeks back. It's the bigger brother of my existing SSG. The frame is slightly larger and fitted out with the classic SSG specs, 26" steel rim x 21 magnets, Teslagenx board but with a 9 filar coil from http://www.aussiecoils.com to use all 8 Transistors. Some good news is that I got 1:1 in gen mode, hurray!!!, but in radiant mode it still eludes me I'm really starting to think the batteries I bought for testing are garbage. I'll probably do some more COP testing in a few weeks and might post a youtube vid.

    So here they are working on some 12V Trojan's, Big Woody is taking a rest at the moment while I pull some energy out of it's charge battery. More good news is that these 12V Trojan's are coming good! I can now top 2 of them on my TST5 after having pummled them with my Comparator and Radiant charging. The other 2 haven't been in the rejunation cycle that long but I'm sure they will come good as well.

    rejuvinators.jpg
    thelads.jpg

  9. #29
    Senior Member jelloir's Avatar
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    Hey Branch, Thanks! Just standard #20/#23 config.

  10. #30
    Nice looking build, Jelloir. Can't wait to see it checked out and running...
    Best regards

    James, somewhere in Idaho

    “So this is how liberty dies…with thunderous applause.”

    ~ Padmé Amidala ~

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