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What could explain the graphs and cycle stability is that Tesla does not deplete the battery pack below a certain percentage of the real battery capacity or over a threshold... basically they keep the battery pack well beyond the critical ranges where batteries degrade from simply idling, and they "undersell" the pack capacity.
The Prius did this - fanatically keep it's NiMH battery at between 20 and 80% charge. I'm pretty sure cell phones do this too.
Earlier quoted context omitted.
Sharing a form factor does not mean those two things are the same. The only similarity between laptop batteries and tesla batteries is the can they come in, which is... not important. Please don't open a Tesla battery, the bus is at 600 volts and will kill you stone dead, then start a fire
The cells inside a Tesla S are off-the-shelf Panasonic catalog parts and are identical to parts found in some laptops (and flashlights, and so forth). Tesla's contributions are entirely in the controlling electronics, integration, cooling, etc.
[1]: https://electrek.co/2017/05/04/tesla-battery-researcher-chem...
FYI: Tesla batteries are literally laptop batteries with cell balancing. No secret battery magic going on. You could in theory crack open the pack and replace inefficient cells to get your capacity back. But, I'm assuming this is too huge a PITA for most people.
You lose about 5% capacity in the first 45k miles, then it's essentially flat- 3% in 120k miles. It seems like keeping your charge level at 100% has some impact on lifetime, but lower than 90% looks to have very limited returns. I'll be interested to see how the cycle graph evolves, but right now it looks like batteries will on average make it to 2500-3000 cycles, which is great. There are a number of early outliers…
IIRC no high voltage car batteries are actually charged/discharged 0-100%, even if it reads so from the user's perspective. This is due to significantly increased wear on the batteries when fully charged/discharged, and why a cellphone battery only lasts a few years. The batteries need to be significantly over-provisioned to extend their lifespan. A Prius, for example, will keep the battery's SOC between 40-80%, and…
Earlier quoted context omitted.
The cells inside a Tesla S are off-the-shelf Panasonic catalog parts and are identical to parts found in some laptops (and flashlights, and so forth). Tesla's contributions are entirely in the controlling electronics, integration, cooling, etc.
That hasn't been true for a very long time. Tesla uses their own chemistry[1] and has put in extensive work improving it. One of the higher-profile changes was that they use 1-2% silicon (Musk mentioned this in a stockholder call), which panasonic still hasn't rolled out to the rest of their batteries. [1]: https://electrek.co/2017/05/04/tesla-battery-researcher-chem...
You lose about 5% capacity in the first 45k miles, then it's essentially flat- 3% in 120k miles. It seems like keeping your charge level at 100% has some impact on lifetime, but lower than 90% looks to have very limited returns. I'll be interested to see how the cycle graph evolves, but right now it looks like batteries will on average make it to 2500-3000 cycles, which is great. There are a number of early outliers…
IIRC no high voltage car batteries are actually charged/discharged 0-100%, even if it reads so from the user's perspective. This is due to significantly increased wear on the batteries when fully charged/discharged, and why a cellphone battery only lasts a few years. The batteries need to be significantly over-provisioned to extend their lifespan. A Prius, for example, will keep the battery's SOC between 40-80%, and…
Earlier quoted context omitted.
The cells inside a Tesla S are off-the-shelf Panasonic catalog parts and are identical to parts found in some laptops (and flashlights, and so forth). Tesla's contributions are entirely in the controlling electronics, integration, cooling, etc.
That hasn't been true for a very long time. Tesla uses their own chemistry[1] and has put in extensive work improving it. One of the higher-profile changes was that they use 1-2% silicon (Musk mentioned this in a stockholder call), which panasonic still hasn't rolled out to the rest of their batteries. [1]: https://electrek.co/2017/05/04/tesla-battery-researcher-chem...
Average life of ICE vehicles can't be 266kkm, that's absurdly low. Most of people I know have bought vehicles with that mileage and used it for another 100kkm after that at some point in their life (think first/second car, second family car, etc.). It's important to know that especially in Central/Eastern Europe, you can never trust the car's odometer - even the cars I'm talking about had probably more than 350kkm wh…
It doesn't mean that car can't last longer than that, but more and more repairs are to be expected, and it is more likely to fail at any time. If you are a professional, keeping such a car doesn't make economical sense.
Furthermore, in high income countries, they actually want you to destroy these old cars to promote the new car market.
Earlier quoted context omitted.
That hasn't been true for a very long time. Tesla uses their own chemistry[1] and has put in extensive work improving it. One of the higher-profile changes was that they use 1-2% silicon (Musk mentioned this in a stockholder call), which panasonic still hasn't rolled out to the rest of their batteries. [1]: https://electrek.co/2017/05/04/tesla-battery-researcher-chem...
I don't think those have ever been used in the model S.
Earlier quoted context omitted.
165 000 miles is 266 000 km, for the readers who might wonder. My car is at 350 000 km now, and I'm not planning on selling it anytime soon. It doesn't have any special problem, except for a malfunctioning electric window lifter on one side. It's only one data point of course.
What percentage of car owners do this? There is some percentage of cars crashed in the first week. It only takes a few of these to cancel out the average of extreme outliers like your car. For reference I have never seen an odometer with more than 200 000 on it before. Even most classic rebuilds I have seen like 69 Corvettes have some high 100K count on them, some event have reset odometers.