Monte,
Lucky you! I hear the Nickel-Iron tech is from some of the first industrial batteries, and they can last for nearly 100 years. No manufacturer in there riches dreams would make such a critter (no repeat customers). The rights were bought by one of the big guys.
I don't know the best way to revive them... I'll hunt around. I would guess pure water, gentle agitation or internal circulation (external pump with small hoses fitting inside the cells), charted specific gravity measurements, then additional KOH to the under-performing cells after multiple charge/discharge cycles.
Mark Stafford
--- In electricboats@
>
> 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
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> [Non-text portions of this message have been removed]
>
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