threelonmusketeers@sh.itjust.worksM to Tesla@lemmy.worldEnglish · 27 days agoTesla builds 50 millionth 4680 cell at Giga Texasdriveteslacanada.caexternal-linkmessage-square9fedilinkarrow-up110arrow-down13
arrow-up17arrow-down1external-linkTesla builds 50 millionth 4680 cell at Giga Texasdriveteslacanada.cathreelonmusketeers@sh.itjust.worksM to Tesla@lemmy.worldEnglish · 27 days agomessage-square9fedilink
minus-squareDraupnir@lemmy.worldlinkfedilinkEnglisharrow-up5·27 days agoWhat shape could they do instead? As I understand it a cylindrical cell offers the best energy density and ease of manufacturing
minus-squareferret@sh.itjust.workslinkfedilinkEnglisharrow-up2arrow-down2·27 days 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-squarethreelonmusketeers@sh.itjust.worksOPMlinkfedilinkEnglisharrow-up4·27 days 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-down1·27 days agoTesla do per-cell cooling and the round shape offers more surface area for that
minus-squareferret@sh.itjust.workslinkfedilinkEnglisharrow-up1arrow-down1·27 days agoA cylinder has the least surface area per unit volume of any extruded shape
minus-squareichbinjasokreativ@lemmy.worldlinkfedilinkEnglisharrow-up2arrow-down1·edit-227 days agoGenerally that’s true, but in this case it’s about a flat surface vs curved
minus-squareferret@sh.itjust.workslinkfedilinkEnglisharrow-up1·27 days 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