desulfation mounting for lead battery

[Christophe]

Here is a circuit diagram and explanation to desulfate lead batteries with a pulsed square wave at 1 kHz then discharge:

The process we are presenting here is a bit of the latest state of the art in the field of battery revitalization. It consists in subjecting the battery to regular pulses of charge, brief but very powerful, interspersed with periods of discharge. To our knowledge, this is the most effective way currently used to overcome unwanted sulfation and restore the electrodes to a satisfactory state.

Next in the .pdf:
https://www.econologie.com/desulfater-re ... -4325.html
ou https://www.econologie.info/share/partag ... oWldfy.pdf

Found on: https://www.econologie.com/forums/recyclage- ... t2062.html

More about maintenance of lead batteries: https://www.econologie.com/forums/batterie-v ... 10418.html
http://fr.wikipedia.org/wiki/Batterie_au_plomb

[Alain G]

Good!

To recover it must be charged and unloaded several times, personally I use a power supply 40 variable amps 0-15,5 volts and to unload my UPS on which I plug a ceramic heating 1200 / 1500 watts which has a low voltage protection by leaving the power supply in operation and this creates a charge / discharge oscillation which is done by the inverter alone.

I have 2 batteries that I rarely use that I regenerate this way and it works well!

[dedeleco]

Another different article simpler? :
https://www.econologie.info/share/partag ... MPnf5g.pdf
http://www.minervaabl.be/pages/Mecaniqu ... tterie.htm

Check that the battery is sulphated !!

http://forums.futura-sciences.com/chimi ... plomb.html

and I learned some truk that to "revive a battery"
the first, the most important

- as lead sulphate which has fallen to the bottom of the tank no longer reacts with the porous plates of the lead battery. you have to succeed in putting them back in touch with these walls !! this simply by reversing the battery! the mud that was at the bottom of the tank will be back on the walls to be able to transform again. this technique works relatively well when the walls are still porous

- to make the walls porous, I never tried but read that there were paper-based "expander" which releases organic macromolecules which attacks lead "this attack tends to make lead porous: l as the expander is not common and it is based on paper (wood molecule) I think you can put a small piece of wood (it does not cost anything to try and the wood is therefore insulating its no risk) let me know if the test is successful!

- and some last truk to prevent:

you must never unload a battery too deeply (it damages the plates)
Never add sulfuric acid (let the water evaporate)

Avoid shaking the battery (lead sulphate will pick up more easily from the plate!)

Do not short circuit even for a short time

Doing a long charge rather than several chips has an intensity equal to 10% of the maximum charge (the battery is never fully charged the curve tends to an asymptote) so you can put your battery long charge without the abolish (provided that there is no heating and therefore no evaporation)

[Christophe]

Actually it looks pretty good and given the dates (2000 and 2001) the FR version must be an improvement of the EN version ...

I read the .pdf diagonally and it evokes the 2 to 6 Mhz "resonance" of the battery but the signal is at 1 kHz ... so ??

[I Citro]

- as lead sulphate which has fallen to the bottom of the tank no longer reacts with the porous plates of the lead battery. you have to succeed in putting them back in touch with these walls !! this simply by reversing the battery! the mud that was at the bottom of the tank will be back on the walls to be able to transform again. this technique works relatively well when the walls are still porous

To overturn the battery is quite delicate, the electrolyte can flow through the degassing orifices allowing the hydrogen and oxygen produced during the charge to evacuate (electrolysis phenomena).
Otherwise, yes, the "sludge" stirring is beneficial.
On our electric cars equipped with nickel-cadmium batteries with liquid electrolyte, sludge is also formed.
It was found that the most stressed batteries, especially by fast charges lasted longer (more than 230.000km traveled on a fleet of Berlingo electric with the first set of batteries).
Some experts agree that fast charges, quite violent (60% of the rated current load, 6 times more than the 10% load recommended for lead), would stir the electrolyte by thermal convection effect. ..

- to make the walls porous, I never tried but read that there were paper-based "expander" which releases organic macromolecules which attacks lead "this attack tends to make lead porous: l as the expander is not common and it is based on paper (wood molecule) I think you can put a small piece of wood (it does not cost anything to try and the wood is therefore insulating it does not risk anything) let me know if the test is conclusive! - as the lead sulphate which fell to the bottom of the tank no longer reacts with the porous plates of the lead-acid battery. we must succeed in putting them back in contact with these walls !! this all simply by overturning the battery! the mud which was at the bottom of the tank will be put back on the walls to be able to transform again. this technique works relatively well when the walls are still porous

I am very dubious about these statements ... not very scientific ...
On the Ni-Cd batteries of my electric cars, "blotting" paper dividers separate the plates ... I understand that this is to prevent the migration of metal ions which ultimately cause short circuits on the bad batteries. used.

[Christophe]

Do not read the stupidities of futura science?

Citro, can you tell us here the business model that you use?

If not, can this editing do the same thing? VOLTAGE CONVERTER CONTINUES IN PULSES

http://www.velleman.eu/distributor/prod ... w/?id=9391

frequency: 100 Hz to 5 kHz
power supply: 8 to 35Vcc
max current Output: 6.5A
input voltage: between 2.5 and 35Vcc

The differences is that we do not have the automatic peak of 40 / 50V nor the regulation in end of charge voltage but as the voltage is adjustable we can simulate the peak (35V instead of 50V) a few seconds from time to time and monitor the battery voltage during charging.

2 .pdf here: http://www.velleman.eu/distributor/supp ... code=K8004

[Christophe]

Nothing to do with the technique: why there is only 1 only S to DESULFATATION while one pronounces not dezulfation?

I forgot a spelling rule or is it an exception?

[pinailleur]

I had the problem with a battery of 30AH that was new, but lack of maintenance had greatly sulfated.
The impulse method is attractive but to be effective it is necessary to determine the gripdip resonant frequency (few mhz) without this agreement resonance voltage peaks would be smoothed because of the low impedance of the cells ... and build the generator of pulses according to this frequency specific to each battery.

For lack of time, I opted for the chemical method and well took me, I recovered at least 80% of the initial capacity.

I am very surprised at the results, so on the internal connection bars between the plates of the same cell (we see one by the filling holes) they were white sulphate, after chemical cleaning they were black to slightly marbled ...

Here is a step-by-step explanation.
https://www.econologie.info/share/partag ... Zry6ge.pdf

Bye.

[chatelot16]

do not mix lead batteries and cadnium nickel ... completely different

the story of wood is specific to lead

the old lead-acid batteries had wooden separators because the plastic did not exist

when we replaced the wood with plastic believing that it was better, the longevity of the battery decreased ... it is seen that the wood had a positive role and lignosulfonate was identified as a useful product to the battery ... and since we put in the new battery plate ... I do not see what it could be used to add ... or put wood in the battery used

the idea of ​​returning the baterie to put the mud back on the plate seems dubious ... the lead dropped to the bottom is useless ... spread on the plate will it become useful again? reconnect to the plates?

the manufacture of lead electrode is so bizarre: it stuffs a chemical mixture of lead into a molded lead grid and it succeeds well to connect ... why the mud would not find a place?

[Macro]

I would have to try the chemical method on my PL batteries that have nothing in the vest ... It would make me a nice econocroque ... I need a stack of 95Ah for my tractor ...