12V 60A car battery , maybe dead?

[Groundloop]

Hi Groundloop I m here again I was busy for a while but  yesterday I have made my coil with #14 gauge, as you told me: !was difficult but not impossible! and I could did it this is my first trifilar coil 200 turns of #14 gauge twisted together and just waiting for the BYV29 that are on the way. I m planning to make put a 5w 1k resistor on the output circuit to avoid to damage the transistor by this way the circuit will never run without a small load to avoid high spikes. what do you think about it? I have another idea if the circuit runs so far so good as I expect I want to make five coils and five circuits connecting all outputs in series to desulphate 60v battery bank.What do you think about it? Could it be done?.
  Best regards Groundloop all your posts are well explained

Richdes,

Great job of winding the thick copper wires. One thing I did see in your pictures was some
copper wire to keep the coil together. Please use plastic strips only. Connecting a resistor
at the output (permanently) will defeat the purpose of the circuit. The main purpose of the
circuit is the high voltage spikes so that your sulphated battery connected to the output will
be fixed and the battery charged. I will highly recommend that you ALWAYS connect the
load to the circuit first, then you switch on the oscillator. If you absolutely must run the
circuit without a load, then you can use a over voltage protector in series with your resistor,
and connect the over voltage protector between the output of your circuit.
The over voltage protector must be of a value less than your transistor maximum voltage.
I recommend a over voltage protector with a voltage of 470 Volt. EPCOS has a protector
called 470 VDC 5 kA 5 A, B88069-X2010-S102. It will do the job. That said, the simplest
solution is to always connect a load before you switch on the circuit.

I do not recommend connecting five circuit outputs in series. If you desulphate a battery with
the circuit first, then you can use a regular charger later on to charge the battery.

GL.

[Richdes]

Thank you What you see in the picture to keep the coil together
is not copper wire is thread to sew that I use between the layers of the coil when I was coiling to hold every layer and what you see in the picture is the coil enameled for that reason you saw it like a copper wire. My goal trying to put five circuits together is never use a regular charger to charge my 60v electric scooter at home instead always use the five circuits, but if you told me that is no recommended I don't do it.
                        Thank you

[Groundloop]

Thank you What you see in the picture to keep the coil together
is not copper wire is thread to sew that I use between the layers of the coil when I was coiling to hold every layer and what you see in the picture is the coil enameled for that reason you saw it like a copper wire. My goal trying to put five circuits together is never use a regular charger to charge my 60v electric scooter at home instead always use the five circuits, but if you told me that is no recommended I don't do it.
                        Thank you

Richdes,

Does your 60v electric scooter use lead acid batteries? If so, then you can desulphate and charge them all
at once if all of the batteries are in series. You only need one circuit to do that.

GL.

[Richdes]

Yes My 60v electric scooter use lead acid sealed (AGM) batteries I can add distilled water without any trouble but you tell me that with one circuit I can desulphate five 50ah batteries in series. Do you tell me that the circuit could do the same with one or five in series?

[Groundloop]

Yes My 60v electric scooter use lead acid sealed (AGM) batteries I can add distilled water without any trouble but you tell me that with one circuit I can desulphate five 50ah batteries in series. Do you tell me that the circuit could do the same with one or five in series?

Richdes,

Yes, I see no reason why not. Just disconnect the + wire on the battery that goes to your bike
to isolate the series batteries from the bike electronic. Then connect the circuit and add power
to the circuit. If the batteries is very sulphated, then the voltage over the batteries will go very
high at first. After that the voltage will slowly drop down to a lower voltage. After that the voltage
will slowly climb again. Stop charging on the circuit when the rest voltage is above 12 * 5 Volt and
connect to your regular charger to top charge the batteries.

EDIT: Added a typical voltage diagram when you desulphate a lead acid battery.

I would also like to repeat some safety tips. Always connect the charge battery before switching on input power. Always switch off input power before disconnecting the charge battery. Always charge in a good ventilated area. Never charge a battery without supervision. Never overcharge a battery. Always check that the battery has the correct water level. Refill with distilled water if low water level. If the battery is defect (short circuit) and all you get is a warm battery with no voltage climb then stop the charger and recycle the battery to the nearest recycle station. This charger can not repair a shorted battery cell.

GL.