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I am curious of this study as it goes against the common idea that fast charging is bad for battery health. I'm a little sad they used Tesla for the data source

I am curious of this study as it goes against the common idea that fast charging is bad for battery health. I'm a little sad they used Tesla for the data source as their range values are alleged to be flawed, but understandable due to the high sample size. https://www.reuters.com/legal/tesla-faces-california-class-action-its-ev-range-claims-2023-08-03/ https://www.reuters.com/legal/tesla-faces-california-class-a...

Analemma_ 3y ago
I was curious too, but it sort of makes sense. What batteries dislike is not charging per se, but heat. When you use fast charging in a Tesla, it actively runs a liquid cooling system, so the battery is probably heating up a lot less than the one in your phone and damage is correspondingly less. Also, phone batteries only have a couple cells, Teslas have several thousand: the wear of charge/discharge cycles can be spread out over all of them.
- w-ll 3y ago
  Had no clue Tesla had liquid cooling system, but makes sense. Do that also have a way to heat batteries or other components for cold weather environments?
  - calciphus 3y ago
    The Tesla Y introduced a heat pump for this purpose, and earlier models included heaters. There's some impact to range for running the heater but it helps for sure.
saurik 3y ago
There was a survey done back in 2016 where the results could even support a conclusion that routine fast charging was better than slow charging. https://electrek.co/2016/11/01/tesla-battery-degradation/ https://electrek.co/2016/11/01/tesla-battery-degradation/
linsomniac 3y ago
I get the impression that Tesla has some of the best in the business battery management. That impression is from following Tesla users a bit, including the stories of some of the taxi/limo fleet users, but only passingly. It seems like users were seeing evidence that the batteries would last a million miles with 20% degredation, that was back in 2017/2018, not sure if the battery chemistry has changed that at all. But, it makes me wonder if the other car companies will have similar levels of battery management or suffer from early death. Considering how large a proportion the battery is of the total cost, it makes sense to have some great management.
- depereo 3y ago
  The Ioniq series has had really good long term battery health.
MengerSponge 3y ago
They inflate their range values with some really creative (sketchy) kWh/mi figures, not with outright fraud on the battery capacity.

Analemma_ 3y ago

I was curious too, but it sort of makes sense. What batteries dislike is not charging per se, but heat. When you use fast charging in a Tesla, it actively runs a liquid cooling system, so the battery is probably heating up a lot less than the one in your phone and damage is correspondingly less. Also, phone batteries only have a couple cells, Teslas have several thousand: the wear of charge/discharge cycles can be spread out over all of them.

w-ll 3y ago
Had no clue Tesla had liquid cooling system, but makes sense. Do that also have a way to heat batteries or other components for cold weather environments?
- calciphus 3y ago
  The Tesla Y introduced a heat pump for this purpose, and earlier models included heaters. There's some impact to range for running the heater but it helps for sure.

saurik 3y ago

There was a survey done back in 2016 where the results could even support a conclusion that routine fast charging was better than slow charging. https://electrek.co/2016/11/01/tesla-battery-degradation/ https://electrek.co/2016/11/01/tesla-battery-degradation/

linsomniac 3y ago

I get the impression that Tesla has some of the best in the business battery management. That impression is from following Tesla users a bit, including the stories of some of the taxi/limo fleet users, but only passingly. It seems like users were seeing evidence that the batteries would last a million miles with 20% degredation, that was back in 2017/2018, not sure if the battery chemistry has changed that at all. But, it makes me wonder if the other car companies will have similar levels of battery management or suffer from early death. Considering how large a proportion the battery is of the total cost, it makes sense to have some great management.

depereo 3y ago
The Ioniq series has had really good long term battery health.

MengerSponge 3y ago

They inflate their range values with some really creative (sketchy) kWh/mi figures, not with outright fraud on the battery capacity.