Myles,
Fair enough, I use 1.03 for LiFePO4 batteries. It does show up in electric car conversions but they often operate with loads above 1C.
Eric
--- In electricboats@yahoogroups.com, "Myles Twete" <matwete@...> wrote:
>
> >A Peukert exponent of 1.00 means that there is no Peukerts effect at all
> and that the battery will deliver the same amount of energy at any discharge
> rate. I would guess that the Peukert's exponent for Nickel Iron batteries is
> higher than 1.00
> >Eric
>
> No doubt. References online claim virtually no Peukert effect for any of
> the Nickel chemistries including NiCd, NiZn, NiMH.
>
> I'm sure he just was parroting these. Worse, the weblink he offered drawing
> folks to his personal Peukert calculator page does not provide any support
> for the 1.0 Peukert exponent claim.
>
> From the brief looking I've done, I'd guess that the effective Peukert
> exponent for NiFe is below 1.05, and once you're down that low, unless
> you're drawing high-C loads, I don't think you have to worry much about it.
>
> -Myles Twete
>
Sunday, November 14, 2010
Re: [Electric Boats] Picking batteries
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