120V DC Lead battery desulfator! Lightbulb and Bridge Rectifier!

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#62
I have a battery thats new to a degree. It was bought new, used for two months and a wiring error with another battery, it gave off an eggy smell. Can it be bought back to life? And, I see no-one has mentioned this, but in my country, my supply is 230v, is this too high?

Thanks,

Fuzzymuff
 
#66
Very interesting thread ! There have been many occasions when I've had a non-chargeable car battery and knowing a little about the physics of battery function I've always thought there must be a way of recovering them ! Some have responded to my H.D. chargers 24 volt boost start setting but the disadvantage of that method is that if the battery does start to conduct the current can quickly reach levels enough to boil it , so it needs constant monitoring which is inconvenient. The clever chargers just try for a while then turn themselves off. I had a look at various desulfating charger designs but they needed a fair amount of construction effort. This seems like a good practical method with minimal effort in time and money. There is an old Citroen sitting outside , the battery of which is an ideal candidate to experiment with !!
 
#68
^ I"m guessing high-voltage film caps may work?

Just seen this thread, I think I'll go for a 110v step down trafo if I need to build this design...

Just a quick question, would adding fuses to the AC and DC parts of the circuit cause any issues?

Also, will this design be of any use on batteries which still charge but that have less capacity than they originally had?
 
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#69
Can't see fuses causing any issues , if they blow just install a larger one 🙂
Batteries with reduced capacity are just partially sulfated so this technique should bring them back close to full capacity. The only time it won't help is with shorted cells or cells with partially broken up plates.
 
#70
thermal runaway said:
Can't see fuses causing any issues , if they blow just install a larger one 🙂
Batteries with reduced capacity are just partially sulfated so this technique should bring them back close to full capacity. The only time it won't help is with shorted cells or cells with partially broken up plates.
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Excellent, I think I'm going to give this a go on my car battery.

I've had a rummage around in my trafo box, and can only find a toroid with 45v secondary windings, which is a little less than the 55v windings on a 230v to 110v step down trafo.

Would this 45v trafo still work? I assume it would, I'd rather use a trafo if only for safety reasons. 🙂
 
#79
Come on Guys

I had new fuses in the plugs. My circuit breakers are less than a year old. The battery is fine on the end of a 15m extension lead. My if I used the cooker main and bypassed the fuses and set this up in the kitchen, then maybe it could be dangerous.

Like I said, you have to respect electricity, that doesn't just mean BE CAREFUL, DON'T TOUCH THE LIVE WIRE, YOU'LL GET A SHOCK. You have to take into consideration with everything your doing and consider anybody or animals around you. You are the one doing what your doing? You know what a car battery is? You know about battery acid? Christ, if you don't understand that, you shouldn't be doing this. Perhaps thats why this thread isn't locked by the Moderators.
Are we school children in a class, or do you consider yourself knowledgeable and sensible enough to do what the OP is suggesting?

Peace🙂
 
#80
Fuzzymuff said:
I had new fuses in the plugs. My circuit breakers are less than a year old. The battery is fine on the end of a 15m extension lead. My if I used the cooker main and bypassed the fuses and set this up in the kitchen, then maybe it could be dangerous.

Like I said, you have to respect electricity, that doesn't just mean BE CAREFUL, DON'T TOUCH THE LIVE WIRE, YOU'LL GET A SHOCK. You have to take into consideration with everything your doing and consider anybody or animals around you. You are the one doing what your doing? You know what a car battery is? You know about battery acid? Christ, if you don't understand that, you shouldn't be doing this. Perhaps thats why this thread isn't locked by the Moderators.
Are we school children in a class, or do you consider yourself knowledgeable and sensible enough to do what the OP is suggesting?

Peace🙂
Click to expand...

Also keep in mind the highly explosive hydrogen cloud floating around the top of the battery.
 
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