Friday, July 17, 2009

[Electric Boats] Nickel-Iron Battery Questions

 

Hello Fellow E-Boaters:

I have recently acquired a quantity of Nickel-Iron batteries produced by
Eagle Picher around 1994, originally to be installed in a TVan (electric
vehicle built and sold by Chrysler). They are 200 amp-hour 6-volt modules
and weigh about 55 lbs. with electrolyte and are the same size as a standard
golf cart battery. They appear to have never been used and any original
liquid in the batteries has dissipated into the air as they are totally dry
inside, verified by destructive testing on one module. A simple test of
adding some water to one of the batteries yielded a functioning battery,
although I am not sure if total capacity was restored. They came with about
a liter of Potassium Hydroxide (KOH) flakes to restore the electrolyte.

Questions: What is the best method to restore these batteries to full
capacity? Do I simply add water or do I add a mixture of water and
dissolved KOH flakes? Should I flush out the batteries first and if so, how
would I do that?

My intention is to restore these batteries to proper health and would
appreciate any insight that this group may have.

With thanks,

Monte

[Non-text portions of this message have been removed]

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