307
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 13 May 2024
307 points (99.4% liked)
Technology
34571 readers
546 users here now
This is the official technology community of Lemmy.ml for all news related to creation and use of technology, and to facilitate civil, meaningful discussion around it.
Ask in DM before posting product reviews or ads. All such posts otherwise are subject to removal.
Rules:
1: All Lemmy rules apply
2: Do not post low effort posts
3: NEVER post naziped*gore stuff
4: Always post article URLs or their archived version URLs as sources, NOT screenshots. Help the blind users.
5: personal rants of Big Tech CEOs like Elon Musk are unwelcome (does not include posts about their companies affecting wide range of people)
6: no advertisement posts unless verified as legitimate and non-exploitative/non-consumerist
7: crypto related posts, unless essential, are disallowed
founded 5 years ago
MODERATORS
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.
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.
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
They're brand new and the writer needs a number to look impressive.
but that catched my attention for EVs.
And last decades