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Tesla model Y 4680 battery pack not very serviceable!
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Psi:

--- Quote from: tszaboo on August 13, 2022, 09:08:32 pm ---
--- Quote from: Coordonnée_chromatique on August 13, 2022, 08:54:51 pm ---
--- Quote from: tszaboo on August 13, 2022, 07:59:27 pm ---Realistically, the battery lasts longer than the car.
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Could you give some examples of reliable statistics please ?

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Sure, but you could just google it yourself.
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--- Quote from: SiliconWizard on August 13, 2022, 09:28:48 pm ---Over 90% after 250 000 km... yeah. Really? ::)

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Hm.. i'm not sure if that graph takes into account the cars that have software limited battery capacity.
I mean the cars that received a large battery pack but were sold as lower range cars with range software limited to match the model that was purchased.  I'm pretty sure those cars use the extra capacity to compensate for aging, so they appear to last forever because you don't notice any loss in range until the pack is like 60% deteriorated and it starts eating into your software usable range. Also those cars don't get their batteries charged/discharged to as wide of a voltage range so that helps a lot too.
tom66:

--- Quote from: Psi on August 14, 2022, 03:23:57 am ---Hm.. i'm not sure if that graph takes into account the cars that have software limited battery capacity.
I mean the cars that received a large battery pack but were sold as lower range cars with range software limited to match the model that was purchased.  I'm pretty sure those cars use the extra capacity to compensate for aging, so they appear to last forever because you don't notice any loss in range until the pack is like 60% deteriorated and it starts eating into your software usable range. Also those cars don't get their batteries charged/discharged to as wide of a voltage range so that helps a lot too.

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Only the very early Teslas had software limited packs.  There are caps either side of the pack at like 3V/cell and 4.2V/cell but those are more 'anti-bricking' than any capacity reservation.
nctnico:

--- Quote from: SiliconWizard on August 13, 2022, 09:28:48 pm ---Over 90% after 250 000 km... yeah. Really? ::)

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There are a whole bunch of outliers in the graph that show you can get seriously unlucky and buy a lemon battery pack. Also the amount of data for high mileage numbers is minimal.
tom66:

--- Quote from: nctnico on August 14, 2022, 10:07:26 am ---There are a whole bunch of outliers in the graph that show you can get seriously unlucky and buy a lemon battery pack. Also the amount of data for high mileage numbers is minimal.

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Boy, it sure is good that there's an entire field of statistics based on the idea of statistical distributions that allows you to infer data into the future. 

And of course, everyone knows lemon products are not seen in any other field other than electric cars. 
nctnico:

--- Quote from: tom66 on August 14, 2022, 10:14:36 am ---
--- Quote from: nctnico on August 14, 2022, 10:07:26 am ---There are a whole bunch of outliers in the graph that show you can get seriously unlucky and buy a lemon battery pack. Also the amount of data for high mileage numbers is minimal.

--- End quote ---

Boy, it sure is good that there's an entire field of statistics based on the idea of statistical distributions that allows you to infer data into the future. 

--- End quote ---
But you have to factor in the nature of the device you are deriving statistics from. At some point Li-ion batteries start to lose capacity exponentially. You can imagine a straight line going down gradually but that is a fantasy. So again: there is data missing to draw a definitive conclusion. The graph should have included error bars; that would show an entirely different picture.


--- Quote ---And of course, everyone knows lemon products are not seen in any other field other than electric cars.

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That is not the point  :palm:  The point is that cars (or any item) can have defects. Some are more costly to fix than others based on construction. Looking at the graph the chance that you buy a Tesla with a bad battery is around 1 in 1000.
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