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Anybody using Lithium Titanate batteries for car audio?
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<blockquote data-quote="hispls" data-source="post: 8651306" data-attributes="member: 614752"><p>Definitely not caps. Cost prohibitive to hold even 3 seconds worth of energy for me.</p><p></p><p>LiTe cells actually have higher C rate charging than the LiFePO4 but not as much on the continuous discharge rating. For example the 30,000 cycle rating is at .2 C which would leave you sizing pretty big to be really safe. I'd like to be at 1-3 C ideally on those if I were to do it. The LiFePO4 cells I'm considering are rated over 40C discharge so I'd be looking at 160AH bank for the two big amps. The LiTe bank would be 800-1000AH for around the same money, the catch being not so great on the discharge rate (possibly?), more mass/space, and the issue of oddball voltage. Big upside is 10X life expectancy and superior performance in very cold conditions.</p><p></p><p>I think with what I'm doing anything is rough on the alternator (including playing music as it sits now). LiFePO4 would take a fair bit longer to recharge though after hard discharge. That said, either way I'm going pretty big on a bank and the limiting factor will be how much heat my coils can hold for how long not so much how much reserve I have in the batteries, though I'd like to drop each amp to .35 and potentially do 18-20K burps so I need a pretty chunky bank to hang with that without dropping voltage too hard.</p><p></p><p>Sort of a big gamble at this point since these LiFePO4 cells are pretty well tested and I don't think anybody has used the titanate for car audio yet. We're talking 16$ per cell + shipping (on the LiTe), 100-125 cell bank + a fair chunk of change for some copper bar to bus it all together. I have no real way to test on a smaller scale and shipping breaks huge as you buy quantity so small batch of anything from China is pretty dead.</p></blockquote><p></p>
[QUOTE="hispls, post: 8651306, member: 614752"] Definitely not caps. Cost prohibitive to hold even 3 seconds worth of energy for me. LiTe cells actually have higher C rate charging than the LiFePO4 but not as much on the continuous discharge rating. For example the 30,000 cycle rating is at .2 C which would leave you sizing pretty big to be really safe. I'd like to be at 1-3 C ideally on those if I were to do it. The LiFePO4 cells I'm considering are rated over 40C discharge so I'd be looking at 160AH bank for the two big amps. The LiTe bank would be 800-1000AH for around the same money, the catch being not so great on the discharge rate (possibly?), more mass/space, and the issue of oddball voltage. Big upside is 10X life expectancy and superior performance in very cold conditions. I think with what I'm doing anything is rough on the alternator (including playing music as it sits now). LiFePO4 would take a fair bit longer to recharge though after hard discharge. That said, either way I'm going pretty big on a bank and the limiting factor will be how much heat my coils can hold for how long not so much how much reserve I have in the batteries, though I'd like to drop each amp to .35 and potentially do 18-20K burps so I need a pretty chunky bank to hang with that without dropping voltage too hard. Sort of a big gamble at this point since these LiFePO4 cells are pretty well tested and I don't think anybody has used the titanate for car audio yet. We're talking 16$ per cell + shipping (on the LiTe), 100-125 cell bank + a fair chunk of change for some copper bar to bus it all together. I have no real way to test on a smaller scale and shipping breaks huge as you buy quantity so small batch of anything from China is pretty dead. [/QUOTE]
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Anybody using Lithium Titanate batteries for car audio?
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