garygid
Well-known member
SOC-Meter Improvement Suggestions Summary:
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DougMarker said:1. Instead of a box make the SOC percentage replace the useless miles remaining guess on the dash.
Allow manual input of a "miles per XXX" figure; combine it with the current "SoC" figure to optionally display "remaining miles". It'd be up to the user to acquire her own "miles per XXX" figure: by guesswork, or by using historical data, by using the car's "miles per kWh" figure(s), etc.garygid said:SOC-Meter Improvement Suggestions Summary:
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You're quite right.garygid said:Before that simple "calculator" (one multiply) function would be meaningful,
a MUCH BETTER indication of the remaining usable energy is needed.
You put in 4.3 mi/kWh, and the "guesSOC" value is 10% (28 raw).
Does that dependably mean that there is 2.1 kWh usable energy left?
NO!
So, doing the multiply of 2.1 x 4.3 = 9.03 ...
or even just mental math of 2 x 4 = 8-something ...
can be VERY misleading if only 1.2 usable kWh remains!!!
But I keep seeing people posting the CAN bus SoC number along with a percentage. Does the percentage number also come off of the CAN bus or is it calculated as a percentage of 281 (in which case it's not very useful since the number is not linear)? (Sorry if this has been discussed already; I have not been following the "SoC meter" threads very closely.)garygid said:No, it appears that the "SOC" number is not linear, or even dependable, especially at the low end.
2. Integrate the kW used by the traction motor to report the total kWh used for a given trip. I can get an estimate by dividing the miles_travelled by the reported efficiency, but the efficiency also includes AC and other. I'd like to know the energy just going to (and from) the motor. Would need some mechanism to reset the total (like holding the black button for 3 seconds). Maybe keep two running accumulators - one for drive and the other for regen.DougMarker said:1. Instead of a box make the SOC percentage replace the useless miles remaining guess on the dash.
TickTock said:This thread isn't for the on-dash meter, but Gary's can bus meter.
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