Too bad A123 went under. Their cells would have been PERFECT. You could consider the EnerDel high-power modules carried by evolve electrics (and possibly others, but I haven't seen them elsewhere). They're more expensive than CALB/Thundersky but better suited to your application. 32Ah/44V at 160A continuous, 480A for 10 seconds.
http://www.enerdel.com/mp320-049-hc-bo-moxie-battery/ http://evolveelectrics.com/power-modules/ You might also try looking into Dow Kokam cells (www.kokam.com). I'm not sure if they only sell to OEM's, but I think they sponsored John Wayland at one point. Similar discharge rates to the enerdel. -Ben On Jul 24, 2014, at 10:50 PM, Ben Goren via EV <[email protected]> wrote: > A while ago, I had done some back-of-the-envelope math that told me that I > didn't need to worry much about batteries until the time came to actually > pick which to buy. Now, thanks to y'all, I'm realizing that this may instead > be a show-stopper. > > To recap, I have a chance to buy a 1964 1/2 Mustang in good shape for not > much money. The goal is to get something not unlike the driving experience of > a Volt, with an all-electric range of roughly a couple dozen miles and a > "traditional" Prius-style hybrid range limited only by the gas tank. The > thought is to replace most or all of the driveshaft with one or more electric > motors. > > My initial calculations were simply to divide system volts (144) by cell > volts (3.2), and multiply that number (45) by unit Wh and price and weight > and volume and the like. Almost all the options I looked at gave at least 10 > kWh for a couple-few grand at a weight less than the average American > passenger, so I stopped worrying about it. > > But I now understand that many of those options would only be capable of > putting out 10-15 kW -- an order of magnitude shy of what a pair of 9" motors > would be capable of. And what's the point of having electric motors as > powerful as the combustion engine if the batteries make them act like a > garage door opener? > > In the research I've done since then, it seems that the only ways to get to > something capable of supplying the motors with all they can ask for is either > to go with a full-sized battery pack, at much (*much!*) greater cost and > weight and volume or to go some exotic homebrew route that'll likely cost at > least as much, if not even more. In other words, lacking a relatively > inexpensive small battery pack capable of high discharge, there's nothing to > be saved by going the hybrid route. It'd still gain the extended range and > increased performance, but there'd be none of my anticipated cost or space or > weight savings -- quite the contrary. > > I'm not yet ready to throw in the towel...but it would completely change the > dynamic of the project. > > So...any chance anybody can point me in the direction of a 150 - 200 kW > capable battery with at least 7 kWh capacity (10+ kWh preferred) that > wouldn't break either the bank or the suspension? > > I'm willing to put in the time assembling it from cells, but the only cells > I've found so far that I've thought might be up to the task would set me back > five figures, before any sort of management system or the hardware to package > them or the rest. Indeed, these cells: > > http://www.quallion.com/new-pdf/QLI1250-18650.pdf > > have pretty much perfect specs but I wouldn't be surprised if enough of them > cost as much as an entire Leaf.... > > Thanks, > > b& > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: signature.asc > Type: application/pgp-signature > Size: 801 bytes > Desc: Message signed with OpenPGP using GPGMail > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140724/ed13d309/attachment.pgp> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA > (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
