Quote:
Originally Posted by RedDevil
Why did you NOT view the link to find the cause?
It wasn't a pack (battery) failure after all.
You are just negative without even checking the facts.
The point that comes clear from the video is that the vast majority of packs do 300,000 miles of hard use and hard charging without any discernible degradation at all.
Tesla battery packs, and all other batteries built to that standard, are no longer wear items. Battery replacement should be the exception, not the norm.
Once EV build costs get near or below ICE build costs there's no stopping them.
Everywhere there's electricity there can be EVs. The availability of EVs will only help electrify poor countries. |
From the article you linked:
The first Tesloop car is a 2015 Model S 85D that now has over 430,000 miles on the odometer. That car lost 6% of its original battery capacity or about 20 miles of rated range in its first few months in operation as previously shared. That is worse than typical, as reported by Eletrek. We learned our battery’s degradation was largely due to charging to 100% of capacity multiple times per day between Los Angeles and Las Vegas. The distances between the Tesla Supercharger stations along that route made it necessary. Tesla has built more stations since, allowing for several quicker charges en route. Changing to a practice of keeping the Charge Limit set at 95% slowed the rate of degradation to nearly nothing. That was reassuring, but over-charging is not the only cause of loss of capacity.
That same Model S had its battery replaced twice. The first replacement you can chalk up to our naive charging enthusiasm. The second was a defective battery. We noticed a sudden increase in the rate it was losing capacity and knew something was wrong.
As you can see in the chart below, the loss rate was highest in the last week of August and the first week of September 2017. The battery lost 6.4% of its capacity in those weeks. That is approximately the same loss we saw in the first 194,000 miles, all gone in only 4,500 miles. The battery capacity ultimately dropped 15%. What happened?
Tesla Service reported:
“Diagnostics show the high voltage battery assembly is not functioning appropriately. Removed and replaced the high voltage battery assembly. Replaced with a 90kw permanent battery replacement. Pushed updated firmware to ensure proper communications. Upon completion, function test was performed to confirm concern has been rectified.”
Their 2015 Model S 85D is on its 3rd battery in 5 years. What facts did I miss concerning this car and the battery failure?
As to their other cars:
Driving 300K miles in three years as a shuttle between LA and Vegas is not a normal usage case. Eight vehicles used a shuttles don't tell us anything about "the vast majority of packs"
The typical driver in the USA drives 15,000 miles a year. Will a Tesla go 300K
and 20 years on the original battery? We don't know.