fuckwit_mcbumcrumble comments on First sodium-ion battery storage station at grid level opens with cells that can be charged in 12 minutes

[–] 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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