threelonmusketeersM to Tesla@lemmy.worldEnglish · 4 months agoTesla builds 50 millionth 4680 cell at Giga Texasdriveteslacanada.caexternal-linkmessage-square9fedilinkarrow-up110arrow-down14
arrow-up16arrow-down1external-linkTesla builds 50 millionth 4680 cell at Giga Texasdriveteslacanada.cathreelonmusketeersM to Tesla@lemmy.worldEnglish · 4 months agomessage-square9fedilink
minus-squareDraupnir@lemmy.worldlinkfedilinkEnglisharrow-up5·4 months agoWhat shape could they do instead? As I understand it a cylindrical cell offers the best energy density and ease of manufacturing
minus-squareferretlinkfedilinkEnglisharrow-up2arrow-down2·4 months agoMaybe they have the best energy density per cell, but you leave a lot of empty space between the cells. I doubt it ends up being more dense
minus-squarethreelonmusketeersOPMlinkfedilinkEnglisharrow-up4·4 months agoHexagons would pack better, but I’m not sure that the marginal gain (if any) in energy density would offset the increase in manufacturing complexity. Also, if any pressure were to build up in a non-cylindrical cell, it would be prone to bulging, possibly damaging its neighbouring cells.
minus-squareichbinjasokreativ@lemmy.worldlinkfedilinkEnglisharrow-up4arrow-down1·4 months agoTesla do per-cell cooling and the round shape offers more surface area for that
minus-squareferretlinkfedilinkEnglisharrow-up1arrow-down1·4 months agoA cylinder has the least surface area per unit volume of any extruded shape
minus-squareichbinjasokreativ@lemmy.worldlinkfedilinkEnglisharrow-up2arrow-down1·edit-24 months agoGenerally that’s true, but in this case it’s about a flat surface vs curved
minus-squareferretlinkfedilinkEnglisharrow-up1·4 months agoThat still doesn’t change anything, unless tesla is only cooling one side of the cell for whatever reason
What shape could they do instead? As I understand it a cylindrical cell offers the best energy density and ease of manufacturing
Maybe they have the best energy density per cell, but you leave a lot of empty space between the cells. I doubt it ends up being more dense
Hexagons would pack better, but I’m not sure that the marginal gain (if any) in energy density would offset the increase in manufacturing complexity.
Also, if any pressure were to build up in a non-cylindrical cell, it would be prone to bulging, possibly damaging its neighbouring cells.
Tesla do per-cell cooling and the round shape offers more surface area for that
A cylinder has the least surface area per unit volume of any extruded shape
Generally that’s true, but in this case it’s about a flat surface vs curved
That still doesn’t change anything, unless tesla is only cooling one side of the cell for whatever reason