Measured power usage of various items and est'd impact on range

[12V]

Wow, great stuff! Thanks Walter and RScott. it looks like at city speeds you can consume more energy maintaining climate than maintaining speed.

[RScott]

Wow, great stuff! Thanks Walter and RScott. it looks like at city speeds you can consume more energy maintaining climate than maintaining speed.

Yes -- I had a moment of realization (unfortunately, after spring arrived) that in the winter if you use a lot of heat (or even a little), you can get better mileage going at faster speeds (since the climate control uses less energy the less time it is running).

[Cord]

For winter driving I use an Amazon 12 Volt DC electric blanket and the heated seats - its summer as you said that is the problem.

[Maflagulator]

I would be interested in knowing what the max regeneration is. shifter in "L" coasting down a steep incline.

Several folks have indicated that the battery system is more than capable of being fully charged in 30 minutes without damage, that would be about 20KW, not too much more than your observation of 18KW in Mountain Mode with accelerator depressed.

I purchased a DashDaq a couple days after obtaining my Volt. I've done a couple datalogs and started to look at them in Excel. I've had a peak of 188 amps of regen occur after a couple of 0 - 60 runs that I recorded. With a full charge being around 388 volts and doing the math, if I'm doing it correctly at all, would be 72,944 watts being pushed back into the system. Under full accelleration in Sport Mode, (haven't done a run in "Normal" yet) I've logged 356 amps being pulled from the system, which accounting for voltage sag under load bringing it down to 360 volts (didn't have voltage logged on these runs unfortunately) would be 128,088 watts. This was at "44.74mph" and the max regen occured at "59.65mph" after hitting my target of 60mph. Higher vehicle speed should give even more regen since it is linear to vehicle speed.

Axle Torque (Foot Pounds) floats around 1,800 - 1,900 from 4mph to 28mph, then fades down with a curve to 826 by 60mph.

0 - 60 btw, was 9.25 seconds done on a flat "race track" in both directions. Little wind to affect it.

I'm new to the DashDaq, so I'm learning what parameters to log on which screens to give the best information. A major reason for purchasing the DashDaq XL was due to not being satisfied with the OEM display simply showing me that I'm drawing power from the battery or providing regen to the battery. I want to know HOW MUCH load am I drawing, and what does backing my foot off of the accelerator pedal do, along with wanting to know how much power am I pushing back into the battery.

Does anyone have any specific parameter that they would like me to monitor for comparison information?


~Scott

[scottf200]

...the max regen occured at "59.65mph" after hitting my target of 60mph. Higher vehicle speed should give even more regen since it is linear to vehicle speed. ~Scott

I think you will find this thread interesting. My attachment (picture) is from the original log where they had scale numbers. They had removed them a couple days after I started the thread.
It-is-all-in-the-data-logger-box
http://gm-volt.com/forum/showthread....ata-logger-box

[saghost]

I purchased a DashDaq a couple days after obtaining my Volt. I've done a couple datalogs and started to look at them in Excel. I've had a peak of 188 amps of regen occur after a couple of 0 - 60 runs that I recorded. With a full charge being around 388 volts and doing the math, if I'm doing it correctly at all, would be 72,944 watts being pushed back into the system. Under full accelleration in Sport Mode, (haven't done a run in "Normal" yet) I've logged 356 amps being pulled from the system, which accounting for voltage sag under load bringing it down to 360 volts (didn't have voltage logged on these runs unfortunately) would be 128,088 watts. This was at "44.74mph" and the max regen occured at "59.65mph" after hitting my target of 60mph. Higher vehicle speed should give even more regen since it is linear to vehicle speed.

Axle Torque (Foot Pounds) floats around 1,800 - 1,900 from 4mph to 28mph, then fades down with a curve to 826 by 60mph.

0 - 60 btw, was 9.25 seconds done on a flat "race track" in both directions. Little wind to affect it.

I'm new to the DashDaq, so I'm learning what parameters to log on which screens to give the best information. A major reason for purchasing the DashDaq XL was due to not being satisfied with the OEM display simply showing me that I'm drawing power from the battery or providing regen to the battery. I want to know HOW MUCH load am I drawing, and what does backing my foot off of the accelerator pedal do, along with wanting to know how much power am I pushing back into the battery.

Does anyone have any specific parameter that they would like me to monitor for comparison information?


~Scott

I think you're mis-estimating the voltage at the time of max power/regen. One thing you may not have figured out yet is that DashDAQ lets you multiply parameters and display the result. As I mentioned when I did the front page article someone suggested:

http://gm-volt.com/2012/06/27/dashda...d-the-curtain/

I usually monitor power at the drive motors (reported amperage at motor * HV Bus voltage/1000 to make it output in kW.) It'll hit 110 briefly, and stay at 105 all day, but I've never seen more than 112 at either the motor or the battery. Regen I've seen hit 60kW under braking. I haven't logged for it, but I don't think it goes much (any?) higher. L at freeway speeds is in the 30-40 kW range.

[Maflagulator]

I may have gotten the high regen numbers by apply the brake pedal, which seems to induce additional regen, meaning that I may not have been coasting down on decelerating regen alone.

~Scott

[George S. Bower]

There's a post at http://gm-volt.com/forum/showthread....Various-Speeds that has a useful chart.

I am using this chart for a vehicle model/ simulation.

Question:

RScott or anyone else,

The tick marks on the Xaxis don't line up with the numbers--ie is 25 MPH supposed to line up with the first tick mark on the X axis or is the first tick mark at 27.5 MPH?????????????

[RScott]

The tick marks on the Xaxis don't line up with the numbers--ie is 25 MPH supposed to line up with the first tick mark on the X axis or is the first tick mark at 27.5 MPH?????????????

My understanding is that the first tick mark is 27.5MPH. If you look at the graph, every point is right above the middle of one of the numbers (e.g. one point above the "25" label, another over the "30" label, etc.). So I believe the actual data points are 25 through 75, going up by 5 each time (e.g. 25, 30, 35, ... 70, 75). The lines in between are extrapolated.

[George S. Bower]

My understanding is that the first tick mark is 27.5MPH. If you look at the graph, every point is right above the middle of one of the numbers (e.g. one point above the "25" label, another over the "30" label, etc.). So I believe the actual data points are 25 through 75, going up by 5 each time (e.g. 25, 30, 35, ... 70, 75). The lines in between are extrapolated.

Thx RScott--that makes sense.