RE: (ET) batteries

["David Roden (Akron OH USA)" <roden ald net>]

On 15 Feb 2004 at 10:50, Travis Creswell wrote:

> I would suggest that you never let your pack voltage get under 33 volts
> under load.

Thie is pretty good advice.  The usual rule of thumb is to consider an 
under-
load voltage of 1.75 volts per cell (5.25 volts per module, or 31.5 volts 
for 
the pack) as fully discharged.  Below that point you risk cell reversal.  
A 
little "headroom" isn't a bad idea, just as keeping your depth of 
discharge to 
80% or less gives much better cycle life.


David Roden - Akron, Ohio, USA
1991 Solectria Force 144vac
1991 Ford Escort Green/EV 128vdc
1970 GE Elec-trak E15 36vdc
1974 Avco New Idea 36vdc
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