I was hoping that since I would never charge it fully, I could ignore
end point vs temperature.

But that leads to another question, is it OK at all to charge LiFePO4 at
very low rates, like 0.04C?

I suppose it's all worth a try.

Thanks!

Best regards, Bob


On Wed, Nov 6, 2013, at 03:10 PM, Martin Klingensmith wrote:
> On 11/6/2013 1:23 AM, Bob Blick wrote:
> >
> > PS My experience with LiFePO4 so far: I also have a Philips brand solar
> > light that I purchased a couple of years ago, it has a single LiFePO4
> > cell and kills them after 100 days, so I know that you can't just
> > trickle into them and expect many cycles!
> >
>=20
> The end voltage of a lithium battery is very dependent on temperature.=20
> You must have a good, real, temperature reading to know the float=20
> charge. And as M. Adam wrote, they do not like to be floated. You should=
=20
> charge until you hit the peak voltage (peak set by Vmax - Temp * coeff.)=
=20
> and then quit charging until the voltage drops below a threshold.
>=20
> I can't quote numbers because it was a couple years ago that I worked on=
=20
> this project. (An ~8-cell lithium UPS)

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