Oilpan4 wrote: ↑
Wed Sep 18, 2019 7:02 am
What causes the 40kwh batt to heat up so much?
We talking chademo use or does that also include the extended charging time on 6.6kw?
On *just* the 40kWh battery: anything seems to heat up the battery. Looking at it wrong is potentially bad. But all jokes aside - the Leaf 40kWh will heat up under any scenario - both driving and charging - but it'll heat up by far most during QC sessions. Using the 6.6kW charger shouldn't really heat it up much, maybe a degree here and there over many hours of charging.
mux wrote: ↑
Wed Sep 18, 2019 12:12 am
because the 40kWh battery is not very good.
Would a 30 kWh battery be a better choice for a swap ? I think there were more produced for the USA market than 40 kWh
Oh yes! Absolutely, the 30kWh battery is the best battery Nissan ever made. Doesn't rapidgate, QCs up to 80%+, reasonable rate of degradation if you charge to 80% and reasonable range for everyday use. That and the air-cooled 24kWh battery in the e-nv200, that one's surprisingly excellent as well. I've seen 100 000km+ e-nv200s with 90% SoH batteries. Same chemistry, but even the slightest hint of thermal management saves that battery long-term. Unfortunately that's not an option for the Leaf, it's a completely different form factor.
Today I had my first big drive with the ultra-Leaf (40kWh+extender battery). It very slightly disappointed in that it will eventually still rapidgate - I had a 20C temp rise after 55kWh charged over 2 QC sessions and 350km of driving. But: contrary to the bare 40kWh battery, it does cool down during driving and it will probably resist overheating until the 4th QC session in fair weather. As far as the charging and driving experience goes, this is a better car than the 40kWh and 62kWh Leafs, except it doesn't have ProPilot.