12V 60A car battery , maybe dead?

[Palic]

Grounloop, my first 6V battery is on the desulfator,

I have noticed that my laboratory power supply (0...32V,0...3A) gets a little bit crazy
when supling  the desulfator, voltage goes up to 80V or even over 100V , and current
is out of range, even when I setup max 2A. Now this are mesurements on my
power supply digital voltmeter and ampmeter, when using my hand Metex DMM
this is not the case . Maybe becouse the hand DMM uses 20 mesurements
and then displays the average data?
What can be done to solve this enigma?
What are you using as a power supply?

Thank you for your all your data and efforts to help me.
I appreciate that very much
  Palic

[Groundloop]

@Palic,

I use a 0-30V 0-5A lab supply and haven't noticed any strange effects. I guess your lab supply
has a LCD panel? Mine uses LED panel. I guess the pulses from the charger is somewhat
disturbing your LCD panel. One way to avoid that is by using a big (10.000 uF) electrolytic capacitor in parallel with the output of your lab supply.

Groundloop.

[Palic]

@Groundloop
Yup, you were right  , again
33000 uF/63V electrolitic condensator made all the diference
Now I can see that I am using 5.6V and 2.0A
I have noticed no exraordinary voltage rise on battery, just normal
charging. Today I hooked up a second battery after the first one
got 6,10V in the end. Do you think that 24 hours on desulfator for 180Ah battery
is enough?

@Palic,

Just charge ONE by one. Also remember that the battery will improve
over several discharge / charge cycles.

Groundloop.

do you mean discharge / charge cycles on desulfator or on regular charger...after desulfator?

Thank you
  Palic

[Groundloop]

@Palic,

Yes, 24 hours in your case is OK. When I say discharge the battery then I mean just use the battery in your normal setup. After some usage (both charge and discharge) then put the battery back on the pulse charger again for another period. This way the battery will stay as "new" for a long time. The reason is that the pulse charging has "kicked off" some of the lead sulphate covering the lead oxide. The plates gets "cleaner" and can accept charge more easy.
(This is a simplification of what is happening but good enough explanation for most of us.)

When you use the battery then do not forget to check the water level in the cells. If water level drops then add destilled water. Water and acid is the "main" motor that keeps your battery happy. The pulse charger can only give your battery a improvement if the battery is in good working order.

I glad that the capacitor solved your power supply readout problem. 

Groundloop.

[Hhx]

Hi all

This is my first post for this great forum. A while ago that I follow it and it is an invaluable source

@Groundloop
I want to make this circuit (Groundlood circuit), but i have 2 questions:

1) Is it possible to use a toroid core to reduce the nº of turns (As gezgin he suggested  ) ? which the approximate equivalence would be? (I don't have enough wire)

2) Other option:


Which their advice is?

@Palic
Feedback?

Sorry, my english is very poor.
Regards, Hhx