[Falcon1]

Just got a 2019 Bolt. As in they had to take the plastic off for the test drive. I have had it for a couple weeks, and something isn't quite adding up with my range, efficiency and theoretical battery capacity- in a good way though.
For the last couple weeks my efficiency has been very steady at 141-144 Wh/km. With a capacity of 60kWh, this should give me a theoretical range of 416-425 km range, though IMO the car should be using 58kWh for this calculation, especially since temperatures have been between -3C and 12C. I park outside. Instead it is predicting 460km range (average efficiency at the time was 143Wh/km), and I seem to be achieving around this number. I have not done a full cycle, but I am getting about 460*%of charge used. I have done calculations based on OnStar's battery percentage and estimated range as well. For example today at 35% I had an estimated range of 162 km, average efficiency of 141 Wh/km. Theoretically at 35% I should have 21kWh in the pack, but with the other two numbers this does not add up - again assuming the car is calculating based on the full 60kWh. Either I should have 22.84 kWh left, the efficiency should be 129.6 Wh/km or I should have a predicted range of 149 km. One data point I know, but this is representative of the trend.

What am I missing here? Is there a more accurate way to check these numbers or measure the true pack capacity accurately?

 

[NY-Rob]

If you have/purchase a BT OBDII scan device ($20 on Amazon) you can find the exact battery capacity using Torque Pro on your phone.

 

[GJETSON]

If you have/purchase a BT OBDII scan device ($20 on Amazon) you can find the exact battery capacity using Torque Pro on your phone.

Not in my experience. The capacity PID reading for our 12/16 build Bolt LT has varied from 56.2 kWh to 60.0 kWh, with no apparent rhyme or reason.

 

[hickman55]

If you have/purchase a BT OBDII scan device ($20 on Amazon) you can find the exact battery capacity using Torque Pro on your phone.

Apparently GM disabled this PID for the 2019. Mine shows -8.6 regardless of the SoC.

 

[XJ12]

Just got a 2019 Bolt.

Congrats. Welcome to the forum.

 

[MikeyBolt]

What number are you using for average efficiency? Are you using the lifetime average or are you resetting your efficiency after a full charge and using that? For example, I have the efficiency showing on the bottom of the speedometer: I press and hold the check mark on the right of the steering wheel when I start out on a full charge and it resets that number (the default it starts with is 3.9 mi/kWh). Then I refer to that number as I drive because resetting it at the beginning of a full charge will give you the average efficiency since last full charge and for me... the numbers add up when doing it that way.

Mike

 

[Falcon1]

It is the efficiency on the dash and has been running over the last 650km or so. Charged for 4 hrs and drove home. Just checked mychevrolet and it says 67% and 312km of range. On the drive home the efficiency went up to 142Wh/km then dropped back to 141.
I will try resetting this weekend after a full charge. I have some longer highway driving coming up so I will see what I get after that.
Still seems like a large discrepancy

 

[Openair]

The GOM (mostly) uses only the last 50km of driving for its estimation. Like a rolling fuel economy calc from an ICE. it would require quite some luck or very consistent drinking habits for both the GOM and a 650km average efficiency to agree. By the sounds of longing highway driving coming up you've been mostly doing city driving recently. 50km of recent city driving would inflate the GOM range vs a efficiency over 650km that also included some other previous highway driving.
You can see this record of the previous 50km on one of the energy info pages on the touchscreen and watch the GOM spike as inefficient blocks of 5km are replaced by slower driving.
When I'm late for work and do 130km/h I get to work with a predicted 150km left. 25km into my slower drive home I still have 155km range. And neither matches a lifetime efficiency calc using the number from the dash. The GOM is highly dynamic and should not be compare to life time efficiency.

 

[Falcon1]

Okay I will take some more data points over shorter periods. My daily drive is a mix of highway and city driving or a longer and very hilly and windy road to get around all of it.

 

[hickman55]

Check this out:

Understanding the Chevrolet Bolt EV’s Range Estimator | Torque News

The Range Estimator in the Chevy Bolt EV is far more robust than people give it credit for. Join me as I share my experiences traveling with and explaining how to use the Bolt EV's Range Estimator.

www.torquenews.com

 

[AZEVFan]

Check this out:

Understanding the Chevrolet Bolt EV’s Range Estimator | Torque News

The Range Estimator in the Chevy Bolt EV is far more robust than people give it credit for. Join me as I share my experiences traveling with and explaining how to use the Bolt EV's Range Estimator.

www.torquenews.com

Thank you so very much for linking to that article! I had never heard of the Trend Bar until I read the article. It was quite informative. Thanks again.

 

[GregBrew]

Thank you so very much for linking to that article! I had never heard of the Trend Bar until I read the article. It was quite informative. Thanks again.

RTFM

 

[Bob Armstrong]

Just got a 2019 Bolt. As in they had to take the plastic off for the test drive. I have had it for a couple weeks, and something isn't quite adding up with my range, efficiency and theoretical battery capacity- in a good way though.
For the last couple weeks my efficiency has been very steady at 141-144 Wh/km. With a capacity of 60kWh, this should give me a theoretical range of 416-425 km range, though IMO the car should be using 58kWh for this calculation, especially since temperatures have been between -3C and 12C. I park outside. Instead it is predicting 460km range (average efficiency at the time was 143Wh/km), and I seem to be achieving around this number. I have not done a full cycle, but I am getting about 460*%of charge used. I have done calculations based on OnStar's battery percentage and estimated range as well. For example today at 35% I had an estimated range of 162 km, average efficiency of 141 Wh/km. Theoretically at 35% I should have 21kWh in the pack, but with the other two numbers this does not add up - again assuming the car is calculating based on the full 60kWh. Either I should have 22.84 kWh left, the efficiency should be 129.6 Wh/km or I should have a predicted range of 149 km. One data point I know, but this is representative of the trend.

What am I missing here? Is there a more accurate way to check these numbers or measure the true pack capacity accurately?

you are not far off....when you say
"For example today at 35% I had an estimated range of 162 km, average efficiency of 141 Wh/km. Theoretically at 35% I should have 21kWh in the pack, but with the other two numbers this does not add up "

divide 21000 by 141 and you get 149 km. your car is reporting 162. your car is likely taking more stuff into account, but this is why it's called the GOM...the guess o'meter.

 

[bensully17]

As an American, I immediately stopped reading when I realized you were not using the far superior imperial system of measurements (totally kidding). Congrats on the new Bolt! I have a 2019 as well and it’s the best car I’ve ever owned. But it is frustrating that the battery capacity PID got disabled on the ‘19s

 

[ZoomZoom]

As an American, I immediately stopped reading when I realized you were not using the far superior imperial system of measurements (totally kidding). Congrats on the new Bolt! I have a 2019 as well and it’s the best car I’ve ever owned. But it is frustrating that the battery capacity PID got disabled on the ‘19s

I think he's Canadian. When I'm President, after I put a wall around California, Oregon and Washington State, we'll be invading north. I'll convert them to imperial once we're done.