[Ovmsdev] Coulomb metrics !?

[Michael Geddes]

Ok, yes I understand that it can't be changed.  Weird that 'coulomb count'
is not actually in coulombs, but sure, it's merely a factor of 3600 out.
kC would be the SI equivalent that is closest in magnitude to Ah is the
reason I chose it (aH * 3.6)

Michael

On Mon, 9 Jan 2023, 3:42 pm Michael Balzer, <dexter at expeedo.de> wrote:

> Michael,
>
> units on standard metrics must not be changed.
>
> Metric units are selected by a practical approach taking EV community
> conventions into account.
>
> Coulomb count for vehicle batteries is normally measured in Ah, just as
> energy is measured in kWh and power in kW.
>
> I've never seen kC or Joules used in an EV context, but if you see a
> need for this, go ahead.
>
> Regards,
> Michael
>
>
> Am 09.01.23 um 05:30 schrieb Michael Geddes:
> > Hi all,
> > I've just found the total power used/recovered metrics (after
> > realising in the I5 code that I was retrieving but not updating the
> > appropriate metrics).
> > Anyway, I then noticed the following:
> > v.b.coulomb.used
> > v.b.coulomb.used.total
> > v.b.coulomb.recd
> > v.b.coulomb.recd.total
> >
> > The weird thing is that these are all in Amp Hours, which is not
> > coulombs (coulombs is "amp seconds").
> >
> > I'm going to submit a patch-request that adds kC (kilocoulombs) since
> > that keeps the numbers reasonable, as well as megajoules (related to kwh)
> > I was wondering whether it's worth having the above values stored as
> > 'kilocoulombs' rather than 'Amp Hours'!?  But I realise that this
> > would have potentially bad affects as the raw metric values available
> > on servers etc would change. *sigh*
> >
> > Is there anything that can be done?
> >
> > //.ichael
>
> --
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>
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