^ But isn't IB using the IMA LTO to start? Still, best not to run the auxiliary starter motor through it...
hmm, maybe. Plucking that value from my head, I could have sworn it was a real-world measurement from someone around IC... I was actually thinking it was more like 7.x. But I could be wrong.I don't think the 12V droops that much.
Yeah, the 20Ah Toshibas shouldn't have any problem with 12V start. I imagine they'd uphold a solid voltage, like no less than the nominal, so 5 X 2.3V=11.5V or 6 X 2.3V = 13.8V.I looked at the Toshiba spec for the 20Ahr and it lists the capacity as 1200w/cell. Seems like 5 or 6 cells would be 6000w or more so that seems more than adequate to handle the starting load.
I was just thinking the starter current is around 130 amps and the voltage cut device is rated for only 100 amps.I suppose there might be an issue with his minimum voltage cutoff device. It does seem marginal. Maybe we are mixing two issues??
Nope .. sorry to break it to you .. but you're wrong .. not partial at all .. it is 100% true that I'd be ok in the context here with anything less than about ~50mV of balancing .. and what I am ok with is 100% up to me to decide
This context doesn't have multiple different chemistries .. it as one battery Peter put together of A123 AMP20M1HD-A cells .. but even if it did .. it would be more accurate to write something like .. It would depend for you .. because only I get to decide what I'd be ok with .. and if I choose to be ok with less than ~50mV , that is what I've chosen .. I don't get to chose what you would be ok with anymore than you get to decide what I'd be ok with.It depends on the cell chemistry if we are speaking about 50 mv.
Yes he is using A123 20Ah pouch cells AMP20M1HD-A.A123 cells, which I believe retepsnikrep is using is pretty huge because of the very flat discharge curve. Just image balancing a123 cells with 50 mv, it would be pretty bad.
I'm skeptical of this claim.The toshiba LTO cells, its like .02 volts is an amp hour. so 50 mv would be about 2.5 amp hour of capacity.
I'm a little confused about what you think this graph is showing ??
I prefer ... Reduce .. Reuse .. Recycle ..What I'm saying is, if you are going to use A123 or LifePo4, just throw that junk in the garbage and get LTO.
FYI .. In the picture you attached ..In the picture I attached, you can see that each amp hour is about .02 to .03 volts for most of its complete cycle life for a 20amp hour LTO. Unless you are above 2.6 volts. 50mv is about 2 amp hours for move of the packs discharge curve.