Turbo3 wrote: ↑
Tue May 10, 2016 12:20 pm
AHr is calculated by the Leaf BMS ECU and read by LeafSpy. It is assumed by LeafSpy to be the AHr rating at a nominal pack voltage of 360 but that voltage can be changed on the Settings/Battery panel. It is the full charge capacity.
SOC is read from the Leaf and is the state of charge of the battery. It is the true state of charge. That is, when you charge to 100% as indicated by the later model year Leaf dash gauge the real SOC will only be around 95%. To protect the battery the BMS never lets it charge to a real 100% level. The dash gauge is adjusted to make the consumer happy and so they don't get calls to explain why charging to 100% does not show 100% on the dash.
SOH is read from the Leaf and relates to the battery capacity bars but not exactly. Starts out around 100% and drops as battery capacity drops.
Hx is read from the Leaf and inversely related to the battery internal resistance and starts around 100% for a new pack. As the pack ages and internal resistance increases and the percentage drops.
AHr and SOC are used by LeafSpy to generate the Wh used and remaining values.
I think most of this is in the Help file. Keep in mind that only the Nissan engineers in Japan know the real meaning of these values. Their meaning has been deduced (by others here on the forum) based on how these values change over time.
Apologize if this is addressed elsewhere, but so many important posts, likely not found in my searches.
I've noticed a subtle difference in the LeafSpy Pro panel after reloading recently - and the first time for my new 2020 SV Plus. The new lower limit on remaining mile calculation is 5% rather than 0%. Is there any available additional miles available below this 5%? Are there any other changes in your explanations of the various output parameters?
Just and observation: The new remaining miles estimates in the dash seem to correlate quite well until about 50-60 miles remaining and then become very conservation - similar to the Gen 1 Leafs estimates. Maybe the "estimate" is based on LBW or VLBW? Having a new range of over 240 miles, it not so critical, but I do like to know the realistic remaining miles when trip planning.