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from other comments it seems the energy density of batteries currently on the market is about 2/3rds that of lithium cells.
there’s also the asymmetry to worry about: with a max discharge rate of 8C but a charge rate of 3C there could potentially be limits on regen braking. if i’m understanding it correctly, sodium cells degrade quickly at higher charge rates.
Just put condensers/a small lithium break battery in.
i think bmw was working on something like that.
Interesting, but from what I understand limited charging would only be a problem if you do not have large enough battery capacity. So for heavier vehicles with larger capacity this might not matter much.
PS: This video about the CATL NaFePO4 battery also mentions a “half sodium half lithium” battery pack for cars to combine the best of both.