12V 60A car battery , maybe dead?

[AbbaRue]

Do you know if this circuit will work for lead acid gel cells too?
Or is this what most of you are using? 

Also looking at the circuit, it looks like it is just a pulse charging device.
So couldn't we just use a 555 timer set at the right freq. to get the same results?
Any large inductor could function as a source of voltage spikes.

555 timers are a lot cheaper then 600 ft of wire.

[Groundloop]

@Hhx,

I have not tried to use a toroid core on my pulse charger.
I wanted to make the charger as simple as possible while
at the same time powerfull enough to charge bigger batteries.
I have found that by using an air core I get much better
"high voltage spikes" for desulphating purposes. My charger
works as described in my drawing. If you want to try out Ferrite
or soft Iron cores, please do so but I can not give you any coil
data because I have not tried that on this circuit. If you use
a straight Ferrite rod 100 mm long and 10 mm thick, then my best
guess will be that you will need approx. 190 turns of 0,8 mm magnet
wire trifilar wound for all three coils.

I have not seen your circuit before.
Where do you connect the charge battery?


@AbbaRue

I know that my charger (the circuit is on page one in this thread) will
charge lead acid gel cells without problems.

Groundloop.

[Hhx]

Hi all 

@AbbaRue 
Indeed the simplicity in the coil in front of the 555 is interesting. But I believe that the groundloop circuit is better, protected against reversal and isolated out. It would be interesting to be able to contrast them. 
 
@Groundloop 
Thank you for your advice. The circuit feeds of the own battery, we understand that it stores something of load. If it is completely discharged or it is used during more time it is necessary to connect him an external charger (about 2 Amps) to maintain the circuit. 
I will see if I start it, although I am much slower, you are a crack.   
Nevertheless I worry about the confirmation of the circuit, and I would like to compare the results with the two types of coils. 
 
This is the complete source: 
http://glowbugs.net/desulphator.pdf 
 
Another interesting link: 
http://www.dallas.net/~jvpoll/Battery/aaDesulfatorSurvey.html 
 
Sorry, my english is very poor. 
Regards, Hhx

[Groundloop]

@Hhx,

Your English is good enough for me. :-)

Now I understand the circuit you posted. It is an de-sulphate circuit. It draws the power needed
to operate the circuit from the connected battery.

The main difference between your posted circuit and my circuit is that my circuit also charge the connected battery. The circuit will charge the battery regardless of the battery status. If the battery is not short circuit between the plates then my charger will work.

Now, if you connect a heavy (low voltage) sulphated battery then the battery voltage will behave as shown in the attached drawing. Personally I think that a combined de-sulphate and charger is a better choice because you get a fully renewed battery when done.

Groundloop.

[UncleFester]

@Groundloop

Thanks very much for your work on this. I now have the parts, although I am using a Bu208A for the main transistor, it has very similar characteristics to the BUX80, but 700V @ 8Ampere ultrafast switching. I also did not have enough money to buy enough 18 gauge wire (1mm) so I will need to use 23gauge for the other windings.

I should have this built this week.

Thanks again,

Tad