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4680 Battery Cell Performance

Obviously, the 4680 battery cells being delivered in some Model Y’s are brand-spanking new, but does anyone know how they are performing?

- Is the promised superior performance (battery density, range, etc.) being delivered?
- Is TESLA making Model Y’s that get the
same or better range with fewer kWh???

- Could the 4680 battery architecture actually deliver 1,000,000mi battery life/performance?

- Do the 4680 promote/support rapid charging any better than the 2170 battery cells?

- Are the 4680 batteries safer than the 2170’s? Has anyone heard about any fires or other safety related incidents with any Model Y’s with 4680’s?

- How does the structural battery pack hold up in a car crash? Have we seen any Model Y’s with 4680’s in any car crashes yet? Is there any NHTSA “test dummy” crash video stock footage of a Model Y with 4680’s being crash tested?
 
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Maybe we will see some data points on these questions in the not too distant future anyway:
- Is the promised superior performance (battery density, range, etc.) being delivered?
- Is TESLA making Model Y’s that get the
same or better range with fewer kWh???

- Do the 4680 promote/support rapid charging any better than the 2170 battery cells?
 
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Reactions: evphile
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Obviously, the 4680 battery cells being delivered in some Model Y’s are brand-spanking new, but does anyone know how they are performing?

- Is the promised superior performance (battery density, range, etc.) being delivered?
- Is TESLA making Model Y’s that get the
same or better range with fewer kWh???

- Could the 4680 battery architecture actually deliver 1,000,000mi battery life/performance?

- Do the 4680 promote/support rapid charging any better than the 2170 battery cells?

- Are the 4680 batteries safer than the 2170’s? Has anyone heard about any fires or other safety related incidents with any Model Y’s with 4680’s?

- How does the structural battery pack hold up in a car crash? Have we seen any Model Y’s with 4680’s in any car crashes yet? Is there any NHTSA “test dummy” crash video stock footage of a Model Y with 4680’s being crash tested?
@ucmndd is right. At this point it’s too early and we have no data.

Many of your questions depend on the implementation. The 4680 is supposedly a more efficient design with less internal resistance = less heating for a given current, but they also made the battery bigger, meaning a lower surface area/volume ratio and less efficient cooling. How those balance each other is the big question.

As far as 1M mile life goes, that also depends more on the battery pack, car design and usage as much as it does on the battery. If you have a bigger pack with more individual cells you have lower usage of any individual cell per mile and a longer life. Batteries also degrade with time and dependent on storage charge.
 
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I just saw this:

They hint at this in the article but I can think of several potential explanations-
first, the battery design is more efficient with lower internal resistance allowing faster charging without overheating.
Another is that The 4680 battery packs are actually larger than the specified 70 kWh so they're essentially using the 'middle' of the battery capacity where charging is most efficient (i.e. it's actually an 84kWh battery but Tesla is saying 10% is 'empty' and 90% is 'full')

There could be other explanations, to, but it's still impressive charging speed.
 
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