Forum Discussion
BFL13
Apr 11, 2021Explorer II
FWC wrote:pianotuna wrote:
3 tons, Since SiO2 can handle a 243 amp draw from a single 100 amp-hour battery, I guess you are right. Li is a biplane. LOL!
With the caveat that BFL was only able to use ~39 Ah out of his 100 Ah battery at a relatively tame 0.65C draw.
We don't actually have any data for this supposed '243A draw', but based on the Peukert calculations from BFL's test, at 243A, you will get a grand total of 14Ah out of the battery and be flat in 3.6 minutes.
The spec table does it by ever higher draws taking less time to "end voltage" and for the same 5 minute time a lower end voltage for a higher draw
https://soneil.com/wp-content/uploads/2018/07/12-EFSM-100.pdf
Be good to see a table like this for LFPs.
BTW. I think a 0.65C draw for over half an hour is pretty good. I tried AGMs doing that sort of thing, because full-mosey reported he was having good luck doing that with his. They did it, but they took a beating. The SiO2 is supposed to "keep on ticking", so ask me in a few years if that is true.
The table says the 243 amp draw will last 5 minutes with end voltage about 1.82 ? /cell = 10.92v
There is no BMS, so up to you to turn the load off before it is too late looks like.
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