• Login
  • Register
Login
Username:
Password: Lost Password?
 
GoldCoastCB Forum
  • Home
  • Search
  • Member List
  • Help
    • Login
    • Register
    Login
    Username:
    Password: Lost Password?
     
GoldCoastCB Forum › BOARDS › PROJECT AREA v
1 2 Next »
› Lead Acid Battery Desulfator Project

Pages (5): « Previous 1 2 3 4 5 Next »
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Thread Modes
Lead Acid Battery Desulfator Project
Thunderbird Offline
Senior Member
Posts: 559
Threads: 30
Joined: Aug 2010
#11
12-12-2012, 07:19 PM (This post was last modified: 12-12-2012, 07:25 PM by Thunderbird.)
The brightness of the LED means that the battery is pretty flat and needs more work., and also that the battry charger is putting out too many volts and possibly cooking the battery.

If a meter accross the battery shows more than about 14.5 volts its too high.

Try wiring a car tail light bulb in series with 1 lead of the charger to limit the current. You dont want the cells gassing very much at all.

Next time you want to discharge the battery, monitor it and stop discharging at at 10.5 volts. Use a couple of headlight bulbs to do the discharge.

It will take a LONG time to work on the really tired battery, like 2 weeks or more, and the best way to tell how the battery is getting on is to read the voltage accross it after its been charged and desulfated. Leave the charger and desulfator disconnected for 10 minutes to bleed off surface charge, then measure the battery voltage, over 13 volts is good, 13.8 volts is great, lower than that, more desulfating required.

If any battery under charge has hot spots along the sides, the hot spot probably indicates a shorted cell. You can try to repair it by discharging with the 2 headlight bulbs until the battery drops to 10.5 volts than recharge.

Im about to do exactly that with some of my batteries later this week. Im going to use some old jug elements I found in the skunkworks and drop 'em in some water to draw 50 to 100 amps out of the car battery.  Thumbsup Sign10 no  Smoking near the batteries  Tears

Oh and 1 more thing, at supercrap auto they have these battery doodads that measure the specific gravity of the acid, its the most accurate way of knowing the state of charge of a wet lead acid cell, I think I paid $5 for mine.
"If a clutered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign."  Albert Einstein

Well, I have the cluttered desk, I guess that's a start!
Find
Reply
Thunderbird Offline
Senior Member
Posts: 559
Threads: 30
Joined: Aug 2010
#12
12-15-2012, 12:54 PM
It seems cOOter has blown up the "cOOter Proof" desulfator!


I am thinking this [Image: Exploded.jpg] is what Im expecting to find  Sign10

Oh well, it IS under beta test, revision 8 version coming soon.

Cya Smoking
"If a clutered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign."  Albert Einstein

Well, I have the cluttered desk, I guess that's a start!
Find
Reply
Thunderbird Offline
Senior Member
Posts: 559
Threads: 30
Joined: Aug 2010
#13
12-15-2012, 08:28 PM
Update:

I used a car headlight bulb to discharge my little collection of SLA batteries. Funny thing, one battery was at 10 odd volts, wouldnt go higher, but when discharging it would go at times up to 12 volts. Seems that high current discharging does actually burn of dendrites that can short out the cells. Another one did much the same thing, but started at only about 8 odd volts.

I have them on charge once again, and the trusty mark 7 desulfating them.

I tried bunging mark 7 straight across my car battery in the car still connected, it actually did improve the battery, I only left it on for a coupla hours while I was farting about but it did make a difference even in that short time.

Mark 8 with thermistor feedback is going to be built in the next coupla days or so, went to Jaycar and got some goodies.  Thumbsup Cya Smoking
"If a clutered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign."  Albert Einstein

Well, I have the cluttered desk, I guess that's a start!
Find
Reply
cOOter Offline
Administrator
Posts: 1,696
Threads: 211
Joined: Jul 2009
Reputation: 0
#14
12-16-2012, 09:41 PM
Yeah farking odd to witness a battery go up in voltage with a 60 watt bulb connected and drum roll >> NO charger connected.

Smoking
Website Find
Reply
Thunderbird Offline
Senior Member
Posts: 559
Threads: 30
Joined: Aug 2010
#15
12-16-2012, 10:47 PM
I think we best keep this news to ourselves, we've obviously invented a perpetual motion battery, never needs charging!  Happy4 Confused2 Smoking
"If a clutered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign."  Albert Einstein

Well, I have the cluttered desk, I guess that's a start!
Find
Reply
Thunderbird Offline
Senior Member
Posts: 559
Threads: 30
Joined: Aug 2010
#16
01-21-2013, 06:46 PM
I put the parts I bought for a new improved desulfator somewhere safe, and now I cant find them... when I do, I'll get back onto it.  Tongue3 Going to make the new version modular, with the low voltage and high voltage parts on separate boards for ease of testing and changes during beta testing. Stay tuned.  Smoking
"If a clutered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign."  Albert Einstein

Well, I have the cluttered desk, I guess that's a start!
Find
Reply
cOOter Offline
Administrator
Posts: 1,696
Threads: 211
Joined: Jul 2009
Reputation: 0
#17
01-21-2013, 06:57 PM
(01-21-2013, 06:46 PM)Thunderbird link Wrote: Stay tuned.  Smoking

Marget that  Blonde
Website Find
Reply
Papa-J
Guest
 
#18
09-06-2013, 06:41 PM
I've got an old battery that died on me recently.. Wanna give it a burl?  Feel free to keep it for your experimentationszs
Reply
Thunderbird Offline
Senior Member
Posts: 559
Threads: 30
Joined: Aug 2010
#19
09-08-2013, 06:20 PM
An old and recently deceased battery would be cool to test the desulfators on.
Grandpa
Wood_chop
"If a clutered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign."  Albert Einstein

Well, I have the cluttered desk, I guess that's a start!
Find
Reply
cOOter Offline
Administrator
Posts: 1,696
Threads: 211
Joined: Jul 2009
Reputation: 0
#20
04-22-2015, 07:48 PM (This post was last modified: 04-23-2015, 08:42 AM by cOOter.)
Sealed Lead Acid (SLA) Recovery Tips

About bloody time I made a new video Jack can pause on Icon_bounce

Sad news first -- my 100 amp deep cycle is on it's way to the big recycling plant in the sky.

Good news - that near dead 12v 20AH SLA I got off you on Friday is coming along, Chopper  Wood_chop

After some unorthodox Cootering, the stand-by voltage has gone from 3v to 12.3v  Sunny

They say the battery stand-by when new should be 13.5v to 13.8v

I'll whack your MegaPulse desulfator on this patient for a few weeks and see if the stand-by picks up.

It would be cool if gets up to at least 13v. ( I not expecting brand new results from old stuff  Grandpa )

Smoking
Website Find
Reply
« Next Oldest | Next Newest »
Pages (5): « Previous 1 2 3 4 5 Next »


  • View a Printable Version
Forum Jump:


Users browsing this thread: 1 Guest(s)
  • Contact Us
  • Return to Top
  • Lite (Archive) Mode
Community Forum Software by MyBB 1.8.24
Designed By Rooloo.
Top
Linear Mode
Threaded Mode