The 62kWh Battery Topic

[DougWantsALeaf]

Latest theory/hypothesis. If the BMS really holds a buffer, then I wouldn't expect the Gen 2 Leafs to show a lost bar until a few (somewhere between 2 and 6) % below 85% SoH in the GOM.

That might explain why we have many 2018 Leafs around 85% SoH and yet not many/any which have lost a bar.

[DougWantsALeaf]

If you look at the graphs in the video, I feel like they pretty similarly mirror what we see in the Pluses. A 7% drop in the first year and the a flattened line.

https://youtu.be/rYkS9AUIYjY

[GerryAZ]

Interesting video. It appears that my SL+ is doing as well as the Model 3 since current "Gid" reading at full charge is 96.30% of new, current AHr reading is 94.43% of new, and current SOH reading is 94.44% of new after 17 months and 25,707 miles of use.

[SageBrush]

Interesting video. It appears that my SL+ is doing as well as the Model 3 since current "Gid" reading at full charge is 96.30% of new, current AHr reading is 94.43% of new, and current SOH reading is 94.44% of new after 17 months and 25,707 miles of use.

My Model 3 is at 101% of new at 30 months old.

There does seem to be mounting evidence that the + models are doing better than the smaller packs. Since I expected them to do worse and that is increasingly unlikely to be true, I'm happy to say I guessed wrong. It is irony that when Nissan finally made a passive pack that was not crap, they gave up and joined the active thermal control crowd. I presume it is an acknowledgement that 50 - 75 kW charging is not competitive.

[alozzy]

This video details a repaired bad module on a 40 kWh pack, on a LEAF that's used as a taxi (120,000 miles and over 1200 DC quick charges!)

https://youtu.be/-ySOspbt0BM

At the 1:53 timestamp, the physical bulging of the modules in the back of the pack are very telling. It really underscores how much heat DC quick charging produces within the pack and how woefully inadequate passive cooling is!

[DougWantsALeaf]

I thought it was impressive that the other buckled cells hadn't failed. Running a cab on a 40 is quite the duty load.

Guessing the uber drivers with the 62 pack do better as they don't need to do nearly as many DC cycles during a normal day.

[DaveinOlyWA]

Interesting video. It appears that my SL+ is doing as well as the Model 3 since current "Gid" reading at full charge is 96.30% of new, current AHr reading is 94.43% of new, and current SOH reading is 94.44% of new after 17 months and 25,707 miles of use.

My Model 3 is at 101% of new at 30 months old.

There does seem to be mounting evidence that the + models are doing better than the smaller packs. Since I expected them to do worse and that is increasingly unlikely to be true, I'm happy to say I guessed wrong. It is irony that when Nissan finally made a passive pack that was not crap, they gave up and joined the active thermal control crowd. I presume it is an acknowledgement that 50 - 75 kW charging is not competitive.

Its all about workload. Huge difference between 192 hands verses 288 hands. We do have the sliver segment who roadtrip enough to complain about DC charging speed (which means once every other year ) but other than that, the Plus has turned out to be a fairly good compromise on price, range and performance.

Still, it is early and I think the key lies in how many miles will most of us have when the "good" range drops below 200 miles which seems to be the line that most people judge?

As far as the thermal thing? I am not sure if its all about EA's decision to marginalize Chademo or Nissan thinking faster charging speeds are needed? Most of the country doesn't have stations that provide more than 125 amps on Chademo so its like "am I missing something I don't know about?" question.

But the more telling thing is range. The Plus allows me to negate charging speed because I simply charge to the knee and go so I don't see the slow DC speeds because that is range I don't need.

[SageBrush]

I am not sure if its all about EA's decision to marginalize Chademo or Nissan thinking faster charging speeds are needed?

So far Nissan has given no hint of continuing LEAF with CCS. They may yet change their minds but for now it looks to me like a decision based on LEAF peak charging speed and related rapidgate and coldgate issues.

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I'll make a prediction:
In the same way that you never missed range until you got more,
you do not miss faster charging, until you get more.

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A few minutes ago I was planning a 366 mile trip from home to Aspen, CO in our Tesla Model 3. One stop, under 10 minutes of charging. It occurred to me that other than curiosity, there was no reason to plan at all. Just go.

[SageBrush]

Interesting video. It appears that my SL+ is doing as well as the Model 3 since current "Gid" reading at full charge is 96.30% of new, current AHr reading is 94.43% of new, and current SOH reading is 94.44% of new after 17 months and 25,707 miles of use.

My Model 3 is at 101% of new at 30 months old.

There does seem to be mounting evidence that the + models are doing better than the smaller packs. Since I expected them to do worse and that is increasingly unlikely to be true, I'm happy to say I guessed wrong. It is irony that when Nissan finally made a passive pack that was not crap, they gave up and joined the active thermal control crowd. I presume it is an acknowledgement that 50 - 75 kW charging is not competitive.

Its all about workload. Huge difference between 192 hands verses 288 hands.

That helps by lowering pack resistance (increasing pack from 2P to 3P) but I doubt it is most of the story. After all, lower capacity packs degrade just sitting on dealer lots, and we are all familiar with the observation that age is a lot more important that usage in determining degradation rate.

[LeftieBiker]

After all, lower capacity packs degrade just sitting on dealer lots, and we are all familiar with the observation that age is a lot more important that usage in determining degradation rate.

This isn't always the case. Lizard packs seem to not be degrading all that much by age.