[SEL] Battery stuff

[Listerdiesel]

2009/1/31 Jim Kirkes <jd.kirkes at verizon.net>:
> Is there any way to resuscitate a small 12V gell cell or do
> I throw it out?
>
> Jim
>

Jim:

It depends on the failure mode of the battery.

If it has sulphated (sulfated) and gone high internal resistance, then
a constant current charge at C/50 (1/50th the capacity) with the cell
temperature and voltage being monitored may recover 'some' of the
capacity. You'll never recover full capacity from a battery that has
sulphated (sulfated)

If an internal cell link has gone open, then it is dead.

If a cell has gone dead through a crystal shorting out the plates, or
gone open circuit then ditto. Crystals grow internally and pierce the
fibre plate separators, and being conductive, they short the cells

Generally speaking, for what they cost, it is not worth the time and
trouble to set up something for recovery.

Peter
-- 
Peter A Forbes
Email: listerdiesel at gmail.com
http://www.oldengine.org/members/diesel
http://stationary-engine.co.uk
http://www.oldengine.co.uk