How to Revive a Dead Forklift Battery: Difference between revisions
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*Looks like a good instructional on Epsom salt method - [https://www.wrightgrid.com/battery-reconditioning/epsom-salt/]. Magnesium reacts with the lead sulphate, nonconductive crystals go away. The thing I don't understand - if the battery reaction involves sulfation - when does sulfation become irreversible? Only when too much sulfation happened, ie, you drained the bat too deep, and you can't get to the underlying metal? | *Looks like a good instructional on Epsom salt method - [https://www.wrightgrid.com/battery-reconditioning/epsom-salt/]. Magnesium reacts with the lead sulphate, nonconductive crystals go away. The thing I don't understand - if the battery reaction involves sulfation - when does sulfation become irreversible? Only when too much sulfation happened, ie, you drained the bat too deep, and you can't get to the underlying metal? | ||
*It seems that nobody really understands why sulfation is not fully reversible [https://batteryuniversity.com/learn/article/sulfation_and_how_to_prevent_it] | *It seems that nobody really understands why sulfation is not fully reversible [https://batteryuniversity.com/learn/article/sulfation_and_how_to_prevent_it] | ||
*This research paper shows micrograph of crystals. Still, it is not clear that sulfation is well understood. [https://www.sciencedirect.com/topics/earth-and-planetary-sciences/sulfation#:~:text=Scanning%20electron%20micrograph%20of%20PbSO,formation%20of%20irreversible%20sulfation%20are%3A&text=Battery%20storage%20for%20a%20long,40%20days)%20without%20any%20charge.&text=Battery%20operation%20at%20partial%20state%20of%20charge.] | *This research paper shows micrograph of crystals. Still, it is not clear that sulfation is well understood. [https://www.sciencedirect.com/topics/earth-and-planetary-sciences/sulfation#:~:text=Scanning%20electron%20micrograph%20of%20PbSO,formation%20of%20irreversible%20sulfation%20are%3A&text=Battery%20storage%20for%20a%20long,40%20days)%20without%20any%20charge.&text=Battery%20operation%20at%20partial%20state%20of%20charge.] This one, however, shows the concept of shedding - when crystals form, sometimes pieces of lead break off from the spongy lead in the form of crystalized lead. So the lead essentially sheds off the electrode. I would guess we can recover lead sulfate to lead - but - battery will break if the lead is not attached to the electrodes any longer. The electrode material is simply degraded. Ok. | ||
=Video Series= | =Video Series= | ||
Latest revision as of 07:41, 7 February 2021
Article
- https://www.practicalmachinist.com/vb/material-handling-and-rigging/forklift-battery-back-life-303513/
- How do desulfate batteries - [1]
- Hydrometer measures specific gravity of electrolyte - [2]
- Questions - how to knock off sulfate and replace battery acid?
- Specific gravity of bat acid - [3]
- Throw powder down each battery - is this just a base to react with sulfate? [4]
- Use a battery load tester to test if battery is back up
- Looks like a good instructional on Epsom salt method - [5]. Magnesium reacts with the lead sulphate, nonconductive crystals go away. The thing I don't understand - if the battery reaction involves sulfation - when does sulfation become irreversible? Only when too much sulfation happened, ie, you drained the bat too deep, and you can't get to the underlying metal?
- It seems that nobody really understands why sulfation is not fully reversible [6]
- This research paper shows micrograph of crystals. Still, it is not clear that sulfation is well understood. [7] This one, however, shows the concept of shedding - when crystals form, sometimes pieces of lead break off from the spongy lead in the form of crystalized lead. So the lead essentially sheds off the electrode. I would guess we can recover lead sulfate to lead - but - battery will break if the lead is not attached to the electrodes any longer. The electrode material is simply degraded. Ok.
Video Series
- Use epsom salt - mgso4 - [8]. This is great series - [9]. Half cup of epsom salt with water.
- Showed 3 mOhm resistance across 12v bat.
- Instructional on using epsom salt to dissolve sulfate - [10]