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This is very exciting. BEVs that were made before 2016 (I think that was when the last breakthrough trickled down to BEVs in the market) typically had a battery

by manmal 7y ago

This is very exciting. BEVs that were made before 2016 (I think that was when the last breakthrough trickled down to BEVs in the market) typically had a battery lifetime of about 70k miles or maybe a bit more before reaching 70% capacity. Fast-charging regularly might reduce capacity by several percent points within a few hot summer months. Basically, you bought a car for €30k and it might become useless 5-7 years later. Within a couple of years, we have gone from "I don't know, it's a bit risky to buy" to "My grandkids might be able to use this battery in their static storage system in a few decades".

MrRadar 7y ago
I think that was mainly due to early EVs having low battery capacities in general (because batteries cost a lot more then) so daily commuting would cycle them much more deeply than current high-capacity models. This 2017 article[1] shows battery life data for hundreds of Tesla Model S's (which have always come with large-capacity batteries). One of the highest-mileage cars in their data pool had just over 220k km (137k mi) on its battery with 90% of the original capacity remaining. There are also a few outliers with under 100k km that are below 90% capacity, I suspect those are cars that have been subject to a lot of long drives and supercharging. [1] https://www.greencarreports.com/news/1110149_tesla-model-s-battery-life-what-the-data-show-so-far https://www.greencarreports.com/news/1110149_tesla-model-s-b...
- manmal 7y ago
  The difference in lifespan that I mentioned occurred in packs of similar sizes, for all manufacturers but Tesla. Tesla is in its league when it comes to battery lifespan.
NotSammyHagar 7y ago
My 2012 tesla model s didn't seem to follow this. At 5 years old it had barely less capacity than original capacity. Est range went from 275 to 265. If you follow teslas, there are many (100s) of people with great than 100k of miles. The battery heating and cooling system was crucial. The leafs do suffer from serious problems. I wasn't aware they weren't charging up the battery. When speaking of evs, you really have to discuss two worlds, tesla and everyone else.
- manmal 7y ago
  Indeed, Tesla has always had a superior BMS, and I keep hearing that they have a custom electrolyte or something that Panasonic uses for their cells? They seem to get 2-3x the lifetime out of similar cells. The Leafs don't have liquid cooling, and that's the only reason why I won't buy one - it's both bad for battery life, and fast-charging (Leaf owners call it Rapidgate).

by manmal 7y ago

MrRadar 7y ago

I think that was mainly due to early EVs having low battery capacities in general (because batteries cost a lot more then) so daily commuting would cycle them much more deeply than current high-capacity models. This 2017 article[1] shows battery life data for hundreds of Tesla Model S's (which have always come with large-capacity batteries). One of the highest-mileage cars in their data pool had just over 220k km (137k mi) on its battery with 90% of the original capacity remaining. There are also a few outliers with under 100k km that are below 90% capacity, I suspect those are cars that have been subject to a lot of long drives and supercharging. [1] https://www.greencarreports.com/news/1110149_tesla-model-s-battery-life-what-the-data-show-so-far https://www.greencarreports.com/news/1110149_tesla-model-s-b...

manmal 7y ago
The difference in lifespan that I mentioned occurred in packs of similar sizes, for all manufacturers but Tesla. Tesla is in its league when it comes to battery lifespan.

NotSammyHagar 7y ago

My 2012 tesla model s didn't seem to follow this. At 5 years old it had barely less capacity than original capacity. Est range went from 275 to 265. If you follow teslas, there are many (100s) of people with great than 100k of miles. The battery heating and cooling system was crucial. The leafs do suffer from serious problems. I wasn't aware they weren't charging up the battery. When speaking of evs, you really have to discuss two worlds, tesla and everyone else.

manmal 7y ago
Indeed, Tesla has always had a superior BMS, and I keep hearing that they have a custom electrolyte or something that Panasonic uses for their cells? They seem to get 2-3x the lifetime out of similar cells. The Leafs don't have liquid cooling, and that's the only reason why I won't buy one - it's both bad for battery life, and fast-charging (Leaf owners call it Rapidgate).