I would consider my ThunderSky cells as 1C normal draw with bursts of 2C or maybe a little more. I have rarely seen 3C even in the best conditions. If they are cold, don't even expect 2C.
They work OK, but they are not a high performance pack. Mike On July 22, 2014 2:20:42 AM MDT, EVDL Administrator via EV <ev@lists.evdl.org> wrote: >Another factor to consider is that while power capability varies by >design, >as a general rule, smaller cells are usually capable of lower power >output. > >For example, the CALB 40ah cells I mentioned are rated for a maximum >discharge of 2C (80 amps). At 144v, 80a is 11.5kW. Allowing for >losses, >that's only about 12hp from your motor! > >Not being a lithium expert, I don't know how much more than this you >can >actually draw before voltage sag really kicks in. But I'm pretty sure >that >pushing them too hard will shorten their lives significantly. > >If you expect sporty, Mustang-y EV performance, but don't want to carry > >around much of a battery, you'll need to find some cells designed for >high >power. > >The 90ah Winstons I mentioned are rated for only 1C continuous, but >they say >you can draw 10C for 10 seconds. It looks like you then need to allow >at >least 50 seconds of either zero or much lower current for the cell to >recover (how often you can do this isn't clear from the spec). Other >folks >here may know how realistic this is, and/or have some recommendations >for >high power lithium cells. > >David Roden - Akron, Ohio, USA >EVDL Administrator > >= = = = = = = = = = = = = = = = = = = = = = = = = = = = = >EVDL Information: http://www.evdl.org/help/ >= = = = = = = = = = = = = = = = = = = = = = = = = = = = = >Note: mail sent to "evpost" and "etpost" addresses will not >reach me. To send a private message, please obtain my >email address from the webpage http://www.evdl.org/help/ . >= = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > >_______________________________________________ >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)
