Tesla’s SA big battery just got 50% bigger after goals thanks to Autobidder

Re:Tesla’s SA big battery just got 50% bigger after goals th... by zmmmmm on Saturday July 04, 2020 @10:26PM (#23736212)

I'm curious what the lifetime of the batteries is and whether that is being fully incorporated into the evaluation of their cost effectiveness? Of course, given they have already apparently recouped more than their entire cost before even getting fully out of testing phase, it seems like this is not going to be an issue. But I still always do wonder how well this is accounted for with battery tech.

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Re:Tesla’s SA big battery just got 50% bigger after goals th... by vvll on Sunday July 05, 2020 @05:42AM (#23737596)

Lifetime of the batteries is generally linked to throughput (full charge/discharge cycles). For batteries that go through one charge and discharge a day, this results in the battery energy storage capacity being around 60-70% at the end of 10 years [1].

For this Tesla battery (frequency support), the battery isn't required to fully charge/discharge every day, and instead only charges/discharges in response to over/underfrequency events on the power grid (you can see its current status on their website [2]). Without following the day-to-day operation of the battery, you could estimate the lifespan of the battery will be 10 years+.

[1] https://vectorwebstoreprd.blob.core.windows.net/blob/vector/...

[2] https://hornsdalepowerreserve.com.au/

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Re:Tesla’s SA big battery just got 50% bigger after goals th... by sgc on Saturday July 04, 2020 @11:28PM (#23736384)

100%. Nobody makes that kind of asset purchase without lifecycle analysis.

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Re:Tesla’s SA big battery just got 50% bigger after goals th... by toomuchtodo on Saturday July 04, 2020 @11:52PM (#23736474)

> But I still always do wonder how well this is accounted for with battery tech.

https://maartensteinbuch.com/2015/01/24/tesla-model-s-batter...

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Re:Tesla’s SA big battery just got 50% bigger after goals th... by SEJeff on Sunday July 05, 2020 @12:42AM (#23736647)

https://insideevs.com/news/369722/tesla-jeff-dahn-new-batter... Tesla has battery cells that can last a million miles thanks to Jeff Dahn's research.

Jeff Dahn is one of the original inventors of the Lithium Ion battery btw: https://en.wikipedia.org/wiki/Jeff_Dahn

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Re:Tesla’s SA big battery just got 50% bigger after goals th... by toomuchtodo on Sunday July 05, 2020 @12:57PM (#23740084)

My point was that Tesla has proven the longevity of their cells under aggressive duty cycles with their high performance vehicles.

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Re:Tesla’s SA big battery just got 50% bigger after goals th... by SEJeff on Sunday July 05, 2020 @01:03PM (#23740127)

Ah sorry, I mistook that comment as saying they don’t last that long. Yeah I think battery chemistry is one of the (patented) areas where Tesla is far ahead of the rest of the world.

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Re:Tesla’s SA big battery just got 50% bigger after goals th... by toomuchtodo on Sunday July 05, 2020 @01:13PM (#23740214)

My fault, my original comment should’ve been more clear. Your citation is better by the way.

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