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freeenergy1964

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#289791 29-Sep-2021 13:21
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Hi, I'm new so Hello


I'm needing to find a person who is willing to manufacture a desulfator circuit for me


I have recently been gifted a set of forklift deep cycle batteries said to be dead? I have not got them to my workshop yet for closer inspection and testing


24 x 2V cells


I would like to try and rejuvenate as many as I can to be used in an off grid solar house supply system


I will obviously pay for the materials and postage and a labour fee if needed


Many Thanks Paul


PS I'm in Napier


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neb

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  #2786506 29-Sep-2021 18:38
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You'd be better off just buying an off-the-shelf device to do it, having someone design and build a battery analyser/desulfator would probably cost thousands of dollars in time and labour, and you can get cheap analysers/chargers/whatever off Aliexpress for a few tens of dollars.

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  #2786514 29-Sep-2021 18:48
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link them up in series to make 12v and use a car charger like the CTEK Battery Charger 12V 5Amp - MXS5.0

 

It has a recondition mode which desulphates batteries.

 

I cant see why it wouldnt work


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  #2786516 29-Sep-2021 18:53
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Jase2985:

link them up in series to make 12v and use a car charger like the CTEK Battery Charger 12V 5Amp - MXS5.0

 

 

Those things are damn expensive for a one-off fix attempt of batteries that may be dead anyway, you'd be better off trying to track down a Chinese cheapie.



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  #2786517 29-Sep-2021 18:56
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Jase2985:

link them up in series to make 12v and use a car charger like the CTEK Battery Charger 12V 5Amp - MXS5.0


It has a recondition mode which desulphates batteries.


I cant see why it wouldnt work



Will depend on the voltage when you hook them up - generally with a CTek if the battery voltage is too low, they will error and not start the charge process. I've had 12v slabs which have been less than 8v where I've had to 'jump start' the charging - essentially connect another good battery in parallel after hooking the flat one to the charger - give it 10 mins for the CTek to begin charging properly, then remove the good battery.

You could connect a couple of extra 2v batteries in series initially (use a multimeter to check the voltages), and once as 'full' as the CTek will allow, remove the extras and start the cycle again.

  #2786570 29-Sep-2021 19:07
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neb:
Jase2985:

 

link them up in series to make 12v and use a car charger like the CTEK Battery Charger 12V 5Amp - MXS5.0

 

Those things are damn expensive for a one-off fix attempt of batteries that may be dead anyway, you'd be better off trying to track down a Chinese cheapie.

 

 

 

but if your using them for a solar setup you would likely want to condition them regularly anyways


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  #2786828 30-Sep-2021 10:24
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https://www.homemade-circuits.com/battery-desulfator-circuit-explained/

 

some of the circuits are ridiculously simple.

 


However , "The current can be approximately equal to the Ah rating of the battery for those which need to be revived and are badly sulfated"
So ,to desulphate, I'd assume it would need to run at very high current for your forklift batts. A cheap off the shelf unit wont have the current needed to desuphate rather large batts

 

The charger for the electric forklift I used to operate was almost 3 feet high , not some small car battery charger .
Thats the sort of power you'll need for the desuphator to work,  I assume .

 

I did see other sites that mentioned high voltage spikes at lower amperages , running for 48hours to a week. But Id assume youll still need more power than a small
device designed for car batt .

 


Perhaps consider having this professionally done , from a forklift repair company ?
If it was a simple task, Im sure they wouldnt have replaced very expensive forklift batts & given you the old ones. Chances are they are on
their last legs and beyond fixing via desulphation ?

 

 


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