DistortedEnergi

Be careful what you use for comparison. To me, it looks like the torque app is giving you the true SOC, while the car is showing you available SOC.

 

The difference reflects the fact that the easy way to kill Li-ion is full discharge. At a true SOC of 20%, you want the load removed to preserve life - why not tell the user there's nothing left? Same at the high end; overcharging will increase capacity, but greatly accelerate the normal loss of capacity with age.

 

Think of the car display as "charge available" and the Torque SOC display as "true charge level" and the numbers make sense.

 

Have fun,

Frank

That's fair enough, and goes back to my original thoughts that the 20% was some sort of reserve; seems like a lot, though.

 

ModeAndPID Name                           Min Max Unit    Formula                    Header

224801     Hv Battery State-of-Charge     0   300 %       (((A*256)+B)*(1/5))/100    0

...

Hv Battery State Of Charge: Seems OK; had to adjust by a factor of 10 from the automated conversion formula

Showed a range of 36% to 53%, which seems about right given how conservative the vehicle is about extensively discharging / charging

• I hope that is of interest! Also, there are a *ton* of PIDs from the standard banks of PIDs that work and may be interesting.

 

 

Thank you very much for your efforts above.

The HV Battery State of Charge you have is what I've been using for my Energi, but it doesn't appear to be accurate after all.  What made me check it deeper is that at the end of my 18 mile commute using 100% EV Now, the "miles left" arrow would be at 0-1 mile or so (before I started driving in "L" gear), but the Torque app would show 20% battery left.  I initally thought that was some kind of reserve for hybrid mode, but I found a screen in the Energi that shows you your current battery charge as a percentage (it's in the Go Times screen).

On one morning over the18 mile commute, I made multiple comparisons of the car's own battery SoC % displayed vs. Torque's using the above formula.  Here's the comparison (left number is displayed on car, right number is the Torque app #):

95-92

80-80

75-77

69-72

59-65

45-54

38-50

30-43

18-34

15-33

10-29

05-25

02-22

00-21

As you can see, at the beginning of the trip the numbers were similar but as the car reached the 50% mark, they really started to diverge.  Not sure how the formula could be adjusted to match the numbers, but ideally both monitors should show about the same throughout the curve, and certainly Torque should reach 0% when the car does, unless this formula is measuring something different that my simple mind doesn't understand.

Here is what I have so far:

 

Description Display PID Min Max Scale Unit Equation

HV Battery state of charge SoC 224801 0.0 100.0 x1 % ((((A*256)+B)*(1/5))/100)

HV Battery temperature HV Temp 224800 0.0 150.0 x1 DegF ((A*18)-580)/100

HV Battery current in Amps HV Amps 22480b -200 200 x1 Amps ((((Signed(A)*256)+B)/5)/10)*-1

HV Battery Voltage HV Volts 22480d 0.0 400.0 x1 Volts (((A*256)+B)/100)

Temperature inside car Inside Temp 22dd04 0.0 160.0 x1 DegF ((A*18)-400)/10

Thanks for sharing those codes! Have you discovered any others?

I'm a recent C-Max Energi owner, 10 days now.  A few comments on the fordcmaxenergi forum that pointed to this thread sparked my interest in OBD2 monitoring my Energi.

I purchased a ScanTool OBDLink MX bluetooth device and the TorquePro app for Android. 

Anyways, I think one of your formulas is incorrect as posted:

HV Battery temperature ... DegF     ((A*18)-580)/100

When I use that, the temps displayed for my HV Battery are like 7.5 degrees.  I assume the correct formula should be /10 at the end instead of /100, but I haven't tried modifying it.  (Your other temperature-specific formula divides by 10.)

Also, on your pictured display, there's a Volts(CM) read-out showing 14.3 volts.  I didn't see that one in TorguePro's preconfigured PIDs.  Do you recall which one you selected for it?  What's it actually measuring the voltage of? The 12v battery?

I'm usually really good at searching things out with Google or forum search tools, but I'm having a heck of a time finding much information re: our C-Max and OBD2, any pointers from anyone would be appreciated.