this post was submitted on 18 Sep 2025
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cross-posted from: https://lemmy.zip/post/48958993

energy density of 175 Wh/kg

CATL explained that sodium-ion batteries have slightly lower energy density than lithium-ion batteries but provide distinct advantages in low-temperature performance, carbon footprint, and safety.

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[–] lime@feddit.nu 11 points 1 week ago (3 children)

"slightly lower" == 2/3rds, apparently. the model 3's pack is 250Wh/kg. also, 500km range in what? the only way you could fit an equal-range battery in a contemporary compact vehicle like the model 3 would be if it had almost double the density of Li-ion.

[–] ExcessShiv@lemmy.dbzer0.com 19 points 1 week ago (1 children)

The model 3 is not a compact vehicle...it's a regular size sedan.

[–] lime@feddit.nu 5 points 1 week ago

it is apparently D-segment, yeah. i have a C-seg car and have found the model 3 to be very similar in size, but maybe that's just a matter of the height making it look smaller.

[–] JeremyHuntQW12@lemmy.world 1 points 1 week ago

Slighter lower than LFP.

[–] davidgro@lemmy.world 1 points 1 week ago

Sodium itself Is nearly double the density of Lithium. I don't know how much that affects the whole pack, but it's gotta be something.