this post was submitted on 13 May 2024

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First sodium-ion battery storage station at grid level opens with cells that can be charged in 12 minutes (www.notebookcheck.net)

submitted 2 years ago by schizoidman@lemmy.ml to c/technology@lemmy.ml

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[–] blazera@lemmy.world 70 points 2 years ago (12 children)

Time until full charge isnt really a relevant metric for utility storage, you want larger storage, which would increase full charge time. Rate of charge is what matters.

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[–] 0110010001100010@lemmy.world 28 points 2 years ago* (8 children)

210 Ah cells to 90% in 12 minutes.

Assuming I can math early on a Monday morning:

90% of 210 is 189

189 / 12 is 15.75

So they charge at 15.75 an Ah per minute. Not sure how that compares honestly.

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[–] fuckwit_mcbumcrumble@lemmy.dbzer0.com 11 points 2 years ago (6 children)

The C rating is generally what battery charging (and discharging) is measured in. C being the capacity of the pack. So if the pack is 10 Ah and it takes 10 hours to charge it's 1c, if it takes 1 hour to charge then it's 10c.

I found this high current battery pack that's rated for 30c. https://www.lipobattery.us/high-discharge-lithium-ion-battery-30c-2/

I don't feel like doing the math for this battery pack.

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[–] pearsaltchocolatebar@discuss.online 3 points 2 years ago (3 children)

The C rating is for discharging only.

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[–] BlameThePeacock@lemmy.ca 10 points 2 years ago (2 children)

The C rating can absolutely still be used when talking about recharging, it's just usually less relevant.

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[–] pearsaltchocolatebar@discuss.online 4 points 2 years ago (1 child)

No. The C rating is a cell's maximum discharge rate without damaging the cell.

You absolutely can't charge that 30C battery at 30A

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[–] cmnybo@discuss.tchncs.de 8 points 2 years ago

Batteries have separate C ratings for charge and discharge.

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[–] Cort@lemmy.world 1 point 2 years ago

So like 4-5c roughly if the 90-100% charge rate is similar to the 0-90%. Way lower than some of the lithium cells I've seen at 30+c

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[–] B0rax@feddit.de 1 point 2 years ago

You are not completely right. 1 C means it can (theoretically) be charged in 1h. Regardless of the capacity.

10 C means it can be charged in 1/10th of an hour.

To get the maximum current, multiply the capacity by the C rating.

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[+] Revan343@lemmy.ca 2 points 2 years ago

[deleted]

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[–] ChicoSuave@lemmy.world 15 points 2 years ago

They're brand new and the writer needs a number to look impressive.

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[–] delirious_owl@discuss.online 1 point 2 years ago

And last decades

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[+] umbrella@lemmy.ml 1 point 2 years ago* (last edited 1 year ago)

[deleted]

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