wizziwig wrote:... I'm a bit confused about the cumulative energy charged/discharged (CED/CEC) counters reported by Torque.
Shouldn't these numbers agree with the trip computer results reported by the car?
So why the difference and which number is correct?
They are both correct. They measure different things.
The consumption numbers reported by the car uses only the energy that you pay for. "From the pump".
(In reality there is an efficiency loss - you pay for more than actually goes into the battery - I ignore that here for simplicity.)
These figures are equivalent to a gasoline car.
Everyone understands mpg or km/l in this way.
It is these figures that are compared on government websites such as - FuelEconomy.gov
But that is not what we are interested in when we talk about the battery.
The battery is also charged by regeneration.
Battery cycles include the energy paid for, and the regenerated energy.
Battery degradation is proportional to battery cycles.
Example - Here is a screen from my 2015 Soul EV at 57400km. The battery and BMS have never been reset / replaced.
According to the battery data my fuel economy is 57400 / 11394.8 = 5.04 km/kWh.
My reported fuel economy by the car is always around 8.0 km/kWh.
( To understand the difference between fuel economy and consumption see - Fuel economy in automobiles
The large difference of the battery value for fuel economy against the car's value is due to regeneration. I live on the side of a mountain and go up and down hill frequently. Going down hill regenerates energy back into the battery.
In my dataset the person with the least amount of recuperated energy lives in the Netherlands.
I have repeated this explanation and updated my data using this method in Dec2020 here - Torque PIDs question. CEC and CED Reset?