ro_explorer
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MASTER THREAD: 2021 Model 3 - Charge data, battery discussion etc
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AlanSubie4Life
Efficiency Obsessed Member
It's interesting to see the behavior of these new packs. I wonder whether the BMS is properly capturing all the different ways the new cells can behave (for example the 60kWh pack reported a while back). And then these examples of packs that go up in capacity when charged to lower SOC for a bit (not sure how consistent this is - we have counter examples of course, reported here). This happened with the older packs too to some extent (as you mention for your 2020), but mostly it seemed like inexorable decline...
It'll be interesting to see with software updates whether we ever see a shift downwards. They're really doing pretty well so far, in general.
Definitely try it and let us know how it goes. Your example is definitely an outlier from what has been reported here so far. The "starting at 79.2kWh" is definitely something that we have seen reported on LR vehicles (less so on the Performance - they seem to start a little higher, but this is anecdotal, so not sure what is "typical"). But the dive downwards not so typical.
AlanSubie4Life
Efficiency Obsessed Member
Dont expect the 60kWh car just yet. More likely in Q4/2021 or Q1/2022.
The 60kWh was tested as being 10kg heavier at WLTP (1915kg) and also its basic weight according to the type certificate is 10kg heavier at 1835kg.
I have order at mid of June. First EDD was November and now December.. Order for Greece..
I ordered my LR in June, due for delivery in November.
I have been recently contacted by Tesla, proposing a Made in China model with a 2k euros discount. The only difference, they say, is a slightly lower autonomy, from 610 to 580 kms, due to reduced capacity (from 80.5 to 74 kWh). In addition, battery (LG M48EF E3 cells - BT38) can allegedly be charged to 100% without any problem.
Now I am a bit confused.
From what I have read, BT38 batteries are still Lithium based, and I have found no indication that they can be fully charged without any worries. This applies in fact only to LFP batteries, but that's another story.
In short: I am reluctant to go for the MIC model, I fear they come with an "old" battery pack. Has anyone got a hint on this? Thanks!
I have been recently contacted by Tesla, proposing a Made in China model with a 2k euros discount. The only difference, they say, is a slightly lower autonomy, from 610 to 580 kms, due to reduced capacity (from 80.5 to 74 kWh). In addition, battery (LG M48EF E3 cells - BT38) can allegedly be charged to 100% without any problem.
Now I am a bit confused.
From what I have read, BT38 batteries are still Lithium based, and I have found no indication that they can be fully charged without any worries. This applies in fact only to LFP batteries, but that's another story.
In short: I am reluctant to go for the MIC model, I fear they come with an "old" battery pack. Has anyone got a hint on this? Thanks!
It is possibly to be delayed to Q1 2022 my tesla sales manager from Spain told me last week.
This would be very conflicting with Tesla's target to deliver one million cars this year. Obviously, if they can't, due to part shortages, that's a different story, but I believe they will do everything they can to get those LR cars to customer's until the 31st of December.
Candleflame
Active Member
From what i know the LR 74 packs arent iron batteries so the 100% safe charging doesnt apply?
in fact, that's exactly where I get confused. Yet, Tesla has written that they can be safely charged 100%. Am I missing something??
You are missing that sales people often make claims that has no basis in fact.
ro_explorer
Member
I managed today to reach 19% battery. Before connecting the car to the charger I peeked in SMT ... Nominal full pack is now: 76.5KWh (down from 77).
I charged it to 60% and I had to go for a quick ride ... now it is sleeping at 46% till morning. Before leaving the car I checked again SMT ... still 76.5 kwh. So far, in my first calibration step I actually lost an additional 0.5 kwh
... if it will continue to drop I'll contact Tesla service but what should I tell them ? That I'm using a 3rd party app connected via an OBD adapter in the system ?
AlanSubie4Life
Efficiency Obsessed Member
So far, in my first calibration step I actually lost an additional 0.5 kwh
There's nothing to contact Tesla service about - this is normal and expected that you will lose capacity. You just happen to be less lucky than most other (reported) 2021 owners - who have generally not reported significant capacity loss.
But yeah, 3kWh or so - there's nothing to be done about that. You just hope that in a year or two you have less than 10% capacity loss. But it does seem that in your cases you're likely starting lower than most so you're more likely to see more loss.
It's also possible that the calibration and charging to 60% a few times will take some time to have an effect. But I'm not a big believer in that anyway - it may well work for some vehicles - it certainly does, but I'm not a believer in it working for every vehicle. That behavior is probably a function of the BMS and how it understands the pack.
There's really no way to know except to continue with the 60% and see what happens. Everyone's experience will be different. Unless you're seeing 10-15% loss on a brand-new car (see above for the 60kWh case) there's nothing to really be done about it.
Jeremy3292
Active Member
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