piclist 2008\07\03\213405a >
Thread: Batteries that have memory
www.piclist.com/techref/power/batterys.htm?key=batteries
face picon face BY : Jinx email (remove spam text)



> And then bring each cell up to full charge individually, before
> placing  back in service, and then recharge the pack as a whole. :)

Sometimes you need to "encourage" a cell to accept charge by
giving it special attention over others in the pack, and part-charging
it on its own might be necessary

To break it down, yo yo yo break it down -

Say you've got a drill and a six-pack. The missus says, "I'm sick of
seeing you flash your abs, pull that shirt down, take your drill and go
fix my shelf". But you find the drill won't charge. Uh-oh, spaghetti-o

That generally means one or more cells in the pack has become
resistive/resistant. It's probably also 0V. The normal charger
hasn't got enough current behind it to force-charge the pack with
that cell in it. So you have to identify any cells stopping the charge
going in. Once you find them, you give them a zap with a cap

If you can't get to both +ve and -ve terminals, the outer case of
one is often the other electrode of the one next to it. eg the case
of cell1 is its -ve, the case of cell2 is cell1's +ve, if cell1 is at the
-ve end of the pack for example

After zapping the cell(s), put the pack back on the charger. If it
still won't accept a charge, put some charge individually in each
cell in the pack. Somehow apply about 1.4V to it. That's usually
enough to get the pack conditioned for a full charge

<02c301c8dd76$15d09610$89aafea9@ivp1> 7bit

See also: www.piclist.com/techref/power/batterys.htm?key=batteries
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