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> ...and having batteries with 500 Wh/kg could... This seems to be the big if, but I don't speak battery. How close are we to such things?

Shivetya 6y ago
Two stories I found, that both provide insight https://cleantechnica.com/2020/06/10/usas-battery500-initiative-has-achieved-li-metal-battery-energy-density-of-350-wh-kg/ https://cleantechnica.com/2020/06/10/usas-battery500-initiat... https://www.nasa.gov/sites/default/files/atoms/files/650_whkg_1400_whl_recharg_batt_new_era_elect_mobility_ymikhaylik_0.pdf https://www.nasa.gov/sites/default/files/atoms/files/650_whk...
ejolto 6y ago
There is a company called Sion Power that claims to have 500 Wh/kg batteries [0]. "With supply dates beginning in mid-2021 for UAV markets. Broader distribution for the Licerion-HE is scheduled for early 2022." [0]: https://sionpower.com/2020/sion-power-demonstrates-key-electric-vehicle-ev-battery-performance-requirements-in-its-lithium-metal-rechargeable-battery-cell-technology-2/ https://sionpower.com/2020/sion-power-demonstrates-key-elect...
Tade0 6y ago
We're there: https://www.amprius.com/technology/ https://www.amprius.com/technology/ Just not at scale and naturally such batteries are expensive.
simonebrunozzi 6y ago
Commercially and at a reasonable cost? Probably at least 8-10 years from now.
semi-extrinsic 6y ago
I think Musk recently said they are going to have 400 Wh/kg in 3-4 years. So maybe 2030.
elihu 6y ago
I believe lithium iron phosphate tends to be around 120-150 Wh/kg, pretty decent regular lithium ion tends to be around 150, fairly recent Tesla battery packs are a bit over 200. (These are types of batteries that have been around for years that you can easily buy as a normal person for a reasonable cost. There's probably a lot of fancy/new battery technology that is somewhat better but either not mass-produced yet or otherwise prohibitively expensive, or trades off some other desirable quality like safety or durability to get more capacity.)

Shivetya 6y ago

Two stories I found, that both provide insight https://cleantechnica.com/2020/06/10/usas-battery500-initiative-has-achieved-li-metal-battery-energy-density-of-350-wh-kg/ https://cleantechnica.com/2020/06/10/usas-battery500-initiat... https://www.nasa.gov/sites/default/files/atoms/files/650_whkg_1400_whl_recharg_batt_new_era_elect_mobility_ymikhaylik_0.pdf https://www.nasa.gov/sites/default/files/atoms/files/650_whk...

ejolto 6y ago

There is a company called Sion Power that claims to have 500 Wh/kg batteries [0]. "With supply dates beginning in mid-2021 for UAV markets. Broader distribution for the Licerion-HE is scheduled for early 2022." [0]: https://sionpower.com/2020/sion-power-demonstrates-key-electric-vehicle-ev-battery-performance-requirements-in-its-lithium-metal-rechargeable-battery-cell-technology-2/ https://sionpower.com/2020/sion-power-demonstrates-key-elect...

Tade0 6y ago

We're there: https://www.amprius.com/technology/ https://www.amprius.com/technology/ Just not at scale and naturally such batteries are expensive.

simonebrunozzi 6y ago

Commercially and at a reasonable cost? Probably at least 8-10 years from now.

semi-extrinsic 6y ago

I think Musk recently said they are going to have 400 Wh/kg in 3-4 years. So maybe 2030.

elihu 6y ago

I believe lithium iron phosphate tends to be around 120-150 Wh/kg, pretty decent regular lithium ion tends to be around 150, fairly recent Tesla battery packs are a bit over 200. (These are types of batteries that have been around for years that you can easily buy as a normal person for a reasonable cost. There's probably a lot of fancy/new battery technology that is somewhat better but either not mass-produced yet or otherwise prohibitively expensive, or trades off some other desirable quality like safety or durability to get more capacity.)