Battery desulfator science part 2 - Test conditions

[@richardnanis]

Waiting for the third and final part with conclusions ... :-)

[@DataCenterExperts]

A short conclusion will be great!

[@leonwechsler6151]

I wish you had the time to summarize your conclusions! Last thing I did I bought a 25 Amps B&D smart charger, so smart that being in Florida, it told me that the outside environment temperature is to high and stopped charging. In-did it was about 92 degrees and 88% humidity. I think I bought a weather station instead of a charger !!!!

[@FFcossag]

I didn't really get anything conclusive out of this. The desulfator wasn't worth the effort.

[@BasementBen]

Love the attention to detail, its great! Test conditions comparing Voltage against Desulfating is a good idea. Looking forward to more results, I know it takes a lot of Waiting :D

[@leonwechsler6151]

Every time I tried a new method the battery lost one cell. By now after four weeks only two cells remain good. So the only thing left (If I really want to go there) is to open the battery top and pressure wash the plates to remove all the accumulated dirt and shorts, etc.. But I wonder If any good plates are still left inside. The two remaining cells were charging at about 20+ Amps and going up to 8.75 volts when connected and charging at about 5 Amps thru a 1-1/2 ohm ?

[@c1t1z3nz3r0]

cells degrade unevenly, so the good cells will work harder at a higher voltage to reach bulk voltage, at this point the good cells are over voltage and start gassing loosing water and becoming bad cells; you need to add more distilled water to them until the bad cells recover; this is a PITA process, and requires a lot of patience

[@garbleduser]

I have been doing this for a long time. Have you ever tried "reforming" the plates with (gasp) reverse polarity charging from a freshly discharged state? Chargeing, discharging, and reverse charging is how the manufacturer develops the lead oxide, forming dissimilar plates. This has saved my ass on several occasions!

[@FFcossag]

I have not done that, no; I suspect that while it might revive a battery in some circumstances, it's generally not going to provide good enough results for my applications.

[@aogulla]

@Garbled User: Any specific reverse polarity charger that you use?

[@garbleduser]

@@aogulla What I am using is a variable bench power supply. No specific brand required.

[@leonwechsler6151]

I tried this several times using 2 ohm 200 watts resistors with a heat sink and discharged at about 3 to 5 amps. It did not work. I was afraid to discharge without a resistor because the battery had originally 750 CCA !!!! Anyway after every discharge the battery got worse !!! I also replaced the electrolytic twice, did not work !!!

[@ancelb9590]

As it happens , I've done the science for this over a 4 year period, processing a couple 100 auto,marine, deep cycle and diesel batteries with a custom designed system that does a combination of processes, not only desulfation. The final outcome is a professional system capable of a kiloamp of pulsing with full safeties and the ability to sequence two batteries of differing types for regeneration while maintaining 2 others. The outcomes (average, one 45Ah battery per day) are 25% to 33% of batteries return to OEM service and the post regeneration failure rate is now

[@enriquecarmona6498]

Ancel B, would you be able to provide additional info?

[@ancelb9590]

Sure, I have open sourced a portion of the tech. for DIY, it is about 100x as powerful as the 'popukar' desulfator and it can work on a vehicle size battery in a day or less. hackaday.io/project/25741-desulfator-engine-re-climate-change-mitigation

[@naniabusinesses]

@Ancel B Will you provide a way to contact you or allow us to peruse your work?

[@firstmkb]

@@ancelb9590 hey, you are awesome for open sourcing your battery maintenance tech! I’m about to go look at this one, but are there any newer projects you’ve been working on too? Thanks!

[@guillermoiturriaga7863]

Buy Pulsetech Desulfator/Rejuvenator Batts. CHESS MATE.

[@Do_the_Dishes]

LMAO, 11:30 so scientific until you describe the gassing as “Fart noises”. great video! thanks for sharing.

[@philalvirez4614]

where can we find part 1 ? thanks

[@Francois_Dupont]

so is this conclusive?

[@lmt200ish]

This is a older video but since it spikes the voltage to 17 volts peak to peak do you still need a charger hooked up if left for a long period of time or will it maintain a charge?

[@FFcossag]

You obviously need a charger for it to do anything at all.

[@paulmaydaynight9925]

its a shame you didn't finish this science project...

[@naniabusinesses]

I don't see a part 3 and I'm fascinated by the subject.

[@FFcossag]

I never got around to making it, the project fell apart, sorry.

[@naniabusinesses]

Noted. Is the Battery Extra unit closest to your design idea? View it below: www.recovermybatteries.com/products.html I'd like to continue your work if you suspect you can improve over what they've done.

[@kabadisha]

interesting videos. Any chance you can share your design for the desulfator? I have been looking at some of the designs out there based on a 555 timer, but your dynamic response with a microcontroller seems much more elegant.

[@FFcossag]

I'm afraid the design and programming have been lost to time. Trust me, it's not as pretty as you might think.

[@kabadisha]

FFcossag Haha, no worries. Thanks for taking time to reply :-)

[@craignehring]

Great methodology, a pity that cells never quite recover, but then we know lead acid cells do die eventually. Question, had you popped the cell covers to see how dry they might be? I know they are AGM batteries but you can add a bit of water to them but not much. Never personally have tried adding water but I have seen where it can be done to really dried out cells.

[@FFcossag]

On these batteries with the round cell covers, you usually ruin the case if you try to open them. It's a different story on the models that have one big plastic piece covering all the cells. I don't usually open them, though, because 9 times out of 10, poor performance has to do with the platters being broken rather than the electrolyte being cooked off.

[@thedavesofourlives1]

@@FFcossag not when you boil off the water by overcharging!!!!!!!!

[@RemiBusseuil]

When you look at people actually cleaning the plates of dead batteries you realise there is no way a little current trick can fix that kind of corrosion

[@CMDROldDuck]

So does it work?

[@FFcossag]

To some extent, but I ended up abandoning this project.

[@BariMusawwir]

can you please make your conclusions in simple terms so we can understand if desulfators are worth it ? great scientific work

[@FFcossag]

They work somewhat on specific issues, and won't magically revive a completely flat battery with plate damage. Worth it if you know how to gauge the situation, not worth it if you just want a device to "just fix" old batteries.

[@BariMusawwir]

thank you for your great effort and details, I tested a few types of desulfators I bought them a few years back and conducted simple tests on normal car batteries , I put the desulfators along with trickle charge 19 volts for over a week or two and then load tested them and I was very disappointed no improvements!! thats when i packed them all up and gave up// now I am trying one more time but my guess is that the car batteries with thinner plates are harder to fix as they sustain damage easier so my focus now is on deep cycle ones that have thick plates I am trying now on 6.5 amp hour 12 volts and hoping to see some thing in few days

[@David-Masek]

​@@FFcossag Old batteries (not damaged by low voltage under 10.8V) really can't be rejuvenated a bit by desulfator? I've measured capacity of my 10 years old car batteries and it is 26% and 30% of nominal capacity. Now I have got 5pcs 12V 7.2Ah AGM from UPS with capacity about 50% (cells checked, all of them contains electrolyte). My capacity tester is this circuit: www.flickr.com/photos/124591966@N06/43030273220/in/dateposted-public/

[@thedavesofourlives1]

overvoltage will COOK THE WATER off you need to add distilled water to the cells!!!!!!

[@c1t1z3nz3r0]

reversing the PbSO4 (lead sulfide attached to your electrode) back into Pb, PbO2 and H2SO4 needs water for the reverse reaction to take place when applying high voltage pulses; if you lost distilled waster which is a normal process over many years of use , you need to add more of it otherwise the reaction will not take place as expected; best method is to weigh in the battery when new and compare it with the old battery; the difference in weight is the lost water

[@4833504F]

god jul!

[@FFcossag]

+h3po God hjul och grått nytt hår!