If you consider the entire pack design, LFP can approach the specific
energy of NMC, NCA and other metal oxide batteries. Can't _quite_ get to
the same W-hrs/kg on a pack basis, but may be close. The LFP cells also
tend to have lower internal resistance, so the heat generated during
discharge and fast charge can be less.
The naked NCA cells have unbeatable specific energy. However, it
requires quite a bit of extra weight to mitigate potential thermal
runaway in NCA (etc) cells, and a huge engineering effort.
LFP cells don't have these severe thermal runaway problems. Thermal
management can be far less stringent, and thus the pack can be made
simpler and lighter. Even so, LFP won't hold quite as much energy per kg
on a pack level, at least at this point of development. Might be
significantly cheaper, however.
Bill D.
On 10/22/2021 10:57 AM, Mark Hanson via EV wrote:
Hi folks
Looks like Elon Musk is trying to spin LiFePo4 batteries that we used in our
conversions as the latest technology. I wonder if they’re large format cells
too :-).
https://teslanorth.com/2021/08/26/tesla-launches-entry-model-3-with-newer-lfp-battery-tech-in-the-u-s/
Best regards
Mark in Roanoke Va
Sent from my iPhone
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