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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)
this post was submitted on 13 May 2024
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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.
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.
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.
The C rating is for discharging only.
The C rating can absolutely still be used when talking about recharging, it's just usually less relevant.
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
Batteries have separate C ratings for charge and discharge.
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
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.