On 5/4/2013 5:29 PM, John Lussmyer wrote:
So, my old Electric Forklift has a weak battery.
Even after a full charge, the cells are reading a SG of 1.15.
Is there any way to restore some capacity to this? I really can't afford a new
battery for it.
Do a full equalization charge, then check the specific gravity. If it is
low, the cells have lost acid. The acid could be lost from spillage,
fizzing it out the vents from over-filling, or tied up in lead sulfate
on the plates or in the sludge shed from the plates and now at the
bottom of the cells.
In any case, it is OK to add acid to bring the specific gravity back up
to normal. Just be *sure* the cell is fully charged before you do this!
If the specific gravity is too high (over 1.300), the acid will attack
the plate supporting structure and destroy it.
--
ICEs have the same problem as lightbulbs. Why innovate and make better
ones when the current ones burn out often enough to keep you in
business? -- Hunter Cressall
--
Lee A. Hart, http://www.sunrise-ev.com/LeesEVs.htm
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