Lawrence Rhodes wrote:
Lee I'm surprised you would say using less cells when you probably meant
to say less amp hours. If you want 144vdc you are stuck with 45 cells.
The original poster asked about different lithium chemistries. I said
that 3.6v LiPo cells have higher power and energy density, so a pack
with a given acceleration and range would be smaller and lighter.
However, these cells only come in small sizes (like laptop 18650 cells),
so he'd need a very large number of them (many cells in parallel). This
causes wiring and reliability headaches.
3.2v LiFe cells have lower power and energy density, so a pack with a
given acceleration and range would be bigger and heavier. But it's easy
to get them in higher amphour capacities. They are also safer. So this
is the type of cell I would use.
--
A designer knows he has achieved perfection not when there is
nothing left to add, but when there is nothing left to take away.
-- Antoine de Saint Exupery
--
Lee A. Hart, http://www.sunrise-ev.com/LeesEVs.htm
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