SageBrush wrote:lorenfb wrote:Partially, but not a function of battery voltage or other initial battery parameters other than the delta coulombs
Please correct whatever is wrong below:
The car has an amp-meter with a granularity of one second
It keep track of the integrated Amp-seconds since the last charge
And then ?
How are partial charges handled ?
I'm afraid I don't understand this business, AT ALL
Yes, you are correct:
1. The BMS has an integrating "amp-meter" which monitors both positive (charging) and negative (discharging)
and stores that value, e.g. coulombs (Ahrs/3600), flowing in/out of the battery.
2. The BMS was most likely initialized (coded/flashed) with the initial value of Ahrs when the Leaf battery
3. Over time as the battery is used/discharged and charged (even small partial charges), the algebraic sum
of the coulombs modifies the battery's initial value, thereby providing the battery's present condition when
fully charged relative to when the battery was new in Ahrs.
Remember, you used the LeafSpy Ahrs to evaluate your potential purchase of your Leaf, i.e. the Ahrs were within
5% of a new 24kWh Leaf. Most on the forum indicated that Leaf would make a good purchase, as you have hopefully
discovered over time.