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On 06/29/2015 09:08 AM, Matt Lacey via EV wrote: >> For the case of like a 60 volts to 125 volts for a traction pack >> for like a scooter.. why do some choose leaf cells ? seems like >> you have to get a more specialised/ costly BMS like orion. I've >> seen youtube about Vectrix conversions using both. leaf cells are >> american made ? do they have more cycles or power density ? I decided to use Nissan Leaf modules for my 120 volt S-10 truck for the following reasons: -Low cost availability of used cells - I can purchase a totaled Nissan Leaf and (with some elbow grease) remove a pack of used cells that are in very good condition for significantly less than I can purchase new prismatic cells. *This was the biggest deciding factor...I simply couldn't afford to spend enough to buy a 24 kWh pack without buying it used.* -Possibly higher quality - Because I know that Nissan has handled the quality control and bulk purchasing for me, I am guaranteed a certain (automobile engineering) level of quality and regularity between modules. -Possibly longer life (for similar reasons to above...) By getting modules from a 2013 battery I think I am getting the benefits of Nissan's early experimentation. -Nice format - I like the general format and packaging of the modules. -Continued availability - If I need to replace a module, or even the whole pack, I expect that there will continue to be easy availability of replacement modules in the same form factor, and possibly with even better capacity in the future due to the large number of Nissan Leaf's on the road today. For my high amperage/relatively lower voltage (small pickup truck) application the 60 AH capacity is the only real downside. I'd prefer 180-200 Ah modules, so I am having to put them in parallel sets of 3. But for a scooter or car with a high voltage controller/motor, you can just put them in series like Nissan does. I'm using MiniBMS, which is about as cheap as you can get, so the BMS wasn't a big issue for me. Jay -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlWRMkYACgkQSWJjSgPNbM+klACfVxtubbOLjgPeECJEKqhNcDmu yGEAn2IJZ4pMvEW2GafROKJIsA5qNRZI =fz3U -----END PGP SIGNATURE----- _______________________________________________ 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)
