A Tesla battery researcher confirmed up to date take a look at outcomes pointing to batteries lasting over 15,000 cycles or the equal of over 2 million miles (3.5 million km) in an electrical automotive.

Final yr, we reported on Jeff Dahn and his lab, who’re beneath contract to do battery analysis for Tesla, releasing an fascinating paper that reveals how the latest Li-ion battery technology can produce batteries that would last 1 million miles in electrical autos.

In a brand new presentation, Dahn mentioned up to date take a look at outcomes from this new battery, which he hopes turns into the brand new customary Li-ion battery that new battery applied sciences benchmark themselves in opposition to.

The scientist, who’s well known as a pioneer in Li-ion batteries, referenced our article from final yr about their paper and mentioned that it sparked an enormous curiosity on this new battery chemistry and battery longevity.

They’ve continued testing these batteries with a few of them occurring 3 years of testing and over 10,000 cycles:

Dahn now concludes that these batteries in a medium vary electrical automotive would be capable to final over 3.5 million km or over 2 million miles.

He additionally confirmed outcomes primarily based on totally different depths of discharge, which implies to what proportion of capability they’re discharging the batteries earlier than recharging them, and it confirmed the Li-ion batteries performing extraordinarily nicely after as much as 15,000 cycles to date:

Most impressively, the batteries present little or no to no capability degradation when they’re discharged between 25% to 50% of their capability, which is definitely how most individuals use their vehicles.

On common, American drivers use their autos for lower than 30 miles per day.

For instance, with this battery in a Tesla car with over 300 miles of vary, you may use it to commute 30 miles a day and by charging, on common, from 70 to 80% day-after-day, it will end in little or no to no battery degradation.

Contemplating it will imply these batteries may nearly final without end or for much longer than the precise helpful lifetime of a automotive, Dahn brings up the query: can we really want batteries which are that good?

Tesla CEO Elon Musk has been saying that they plan to have batteries that will final greater than 1 million miles for the automaker’s “robotaxis”, that are going to have a a lot greater utilization fee than shopper autos.

Musk has additionally talked about previously how longer-lasting batteries are crucial for different Tesla packages, like Powerwalls, Powerpacks, and Tesla Semi electrical vans.

Dahn additionally brings up that these new tremendous long-lasting batteries might be helpful to allow vehicle-to-grid options.

Up to now, Tesla has been reticent in enabling homeowners to make use of the batteries inside their vehicles to discharge power into the grid because of the influence on battery longevity, however these new batteries would repair these points.

Apparently, Drew Baglino, one in every of Tesla’s prime engineering leaders, has just lately talked about that future Tesla autos may have bi-directional chargers enabling vehicle-to-grid or vehicle-to-everything applied sciences.

Dahn introduced up a number of different fascinating potential makes use of of batteries with excessive longevity and briefly commented on Tesla’s ‘Battery Day’ within the presentation:

“Tesla is shifting ahead on the pace of sunshine. They’re up-scaling their manufacturing facility. They know they’re going to want terawatt-hours of batteries for each power storage and autos. It’s an extremely thrilling time.”

Right here’s Jeff Dahn’s new presentation in full:

Electrek’s Take

Very fascinating and spectacular new take a look at outcomes right here.

It’s particularly fascinating since longevity isn’t one thing Tesla talked rather a lot about in the course of the Battery Day presentation.

It targeted primarily on value and scale, however Tesla has been guiding for some time now that they’re making nice enhancements to longevity and a number of these enhancements appear to be coming from Jeff Dahn’s lab.

Older Tesla autos have already confirmed solely limited battery degradation and generally, batteries in Tesla autos appear to be holding up fairly nice already, nevertheless it’s fascinating to suppose that within the close to future, longevity might be so nice that it allows new options and totally different use instances.

As normal, Jeff Dahn isn’t disclosing if or when Tesla is implementing these modifications, however with the corporate now making its personal cells, I wouldn’t be shocked if the Tesla 4680 cells characteristic some loopy longevity.

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