[Ovmsdev] 12V battery alerts

[Rolf Welde Skeie]

Ok, it seems like a few have similar issues.
The logic behind the calculations seems to be reasonable, it is the 
assumption that there is a 1.5V difference between charging/non-charging 
state which is not generally applicable.
 From my observations it seems like increasing this to 2.0V would take 
care of most mis-firing events.?..

Disclaimer: I'm not an expert on batteries...

Running on 2.5.5 experimental/TC

Rolf

On 10/29/2013 10:00 AM, Matt Beard OVMS wrote:
> Yup, I also get this message and it would be great if it were working
> properly, but it actually fires at 13.1V which is far too high.
>
> Matt
>
>
>
> On 29 October 2013 08:46, Rolf Welde Skeie <rwskeie at gmail.com
> <mailto:rwskeie at gmail.com>> wrote:
>
>     I have the following features set:
>     #0=1, #8=1, #9=1, #15=1, all others =0.
>
>     Can't remember which one made it work, but one of them did, my guess
>     would be #9 :)
>
>     Rolf
>
>
>     On 10/29/2013 09:38 AM, Håkon Markussen wrote:
>
>         I never get this alert.
>         I have a Think City (as Rolf Skeie) and use the iOS-app.
>         I have tested on both an exhausted aux-battery and on a brand new
>         battery in perfect condition.
>
>         Br.
>         Håkon
>
>
>         2013/10/29 Thomas Bergo <thomas.bergo at gmail.com
>         <mailto:thomas.bergo at gmail.com>
>         <mailto:thomas.bergo at gmail.com <mailto:thomas.bergo at gmail.com>__>>
>
>
>              I'm also get this alert.
>
>              Regard, Thomas
>
>              tirsdag 29. oktober 2013 skrev Rolf Welde Skeie følgende:
>
>                  Hi,
>
>                  I'm getting 12V battery alerts ala:
>                  "MP-0 PAALERT!!! 12V BATTERY CRITICAL (13.2V, ref=14.7V)"
>
>                  So the 1.5V hardcoded difference between charged and
>         non-charged
>                  state seems to be too low. The battery is working just
>         fine and
>                  has been tested without any issues, but seems to
>         stabilize at
>                  approx. 12.8V.
>
>                  Is this a global issue; are others experiencing this as
>         well?
>
>                  If this is a issue only relevant to my car: would it
>         make sense
>                  to allow for controlling some of these kind of values
>         through
>                  parameters?
>
>                  BTW, I believe the Think City module could be put in the
>                  production builds, it seems to be working fine.
>
>                  Best regards
>                  --
>                  Rolf Welde Skeie
>                  Solåsen 27, 5223 Nesttun, Norway
>         +47 92403016 <tel:%2B47%2092403016> <tel:%2B47%2092403016> /
>         rwskeie at gmail.com <mailto:rwskeie at gmail.com>
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>     --
>     Rolf Welde Skeie
>     Solåsen 27, 5223 Nesttun, Norway
>     +47 92403016 <tel:%2B47%2092403016> / rwskeie at gmail.com
>     <mailto:rwskeie at gmail.com>
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-- 
Rolf Welde Skeie
Solåsen 27, 5223 Nesttun, Norway
+47 92403016 / rwskeie at gmail.com