4 ms·

The usage model they're targeting is trucks that return to a depot overnight. Local delivery and drayage routes have ample time to charge. Honestly one of the

The usage model they're targeting is trucks that return to a depot overnight. Local delivery and drayage routes have ample time to charge. Honestly one of the bigger issues is upgrading the electrical service at the depots to support the chargers. I worked on a prototype EV truck, and they had to software-limit the charger when first installed, because running flat-out it could draw more power than the entire rest of the prototype facility. They had to get the utility out to drop a new transformer before they could unleash the charger's full power. The power you buy in a few gallons of diesel fuel is simply staggering.

rkangel 6y ago
It's the new version of the old 'the fastest data rate is a truck full of harddrives'. Now we can say 'for transferring energy, you can't beat a petrol pump pouring fuel'
- dredmorbius 6y ago
  MOX fuel pellets do slightly better. Tritium-lithium may, some day. But yes, hydrocarbon chains are damned energy dense for chemical reactions.
- throwaway0a5e 6y ago
  >for transferring energy, you can't beat a petrol pump pouring fuel Pretty much any time fissionable material is moved probably beats it.
ben_w 6y ago
> The power you buy in a few gallons of diesel fuel is simply staggering. 1 Liter per second ~= 38.6 megawatts, for diesel. I’ve never bothered paying attention to the flow rate in a fuel station, but it’s really fortunate that electric cars are fundamentally more efficient than combustion engines.
- Symbiote 6y ago
  For comparison, a high speed train is around 10MW according to a quick search.
- myself248 6y ago
  Quoth Wikipedia: > Image result for gas station pump flow rate Light passenger vehicle pump up to about 50 litres (13 US gallons) per minute (the United States limits this to 10 US gallons (38 litres) per minute); pumps serving trucks and other large vehicles have a higher flow rate, up to 130 litres (34 US gallons) per minute in the UK. and 40 US gallons (150 litres) in the US. So roughly 80 megawatts coming out of that diesel nozzle. Most impressive! I've heard of CCS chargers in development that'll push 350kW (920V, 500A), which involves crazy stuff like liquid-cooled connectors. They flow 3M Novec through the cable.: https://ittcannon.com/core/medialibrary/ittcannon/website/literature/catalogs-brochures/itt-cannon-evc-dc-liquid-cooled-brochure.pdf https://ittcannon.com/core/medialibrary/ittcannon/website/li...
- throwaway0a5e 6y ago
  Assuming 1/3 efficiency (because ICE) a gasoline pump (34ga/min) has a power output of a little over 8000hp or 6mw which comes out to around 4000amps assuming normal 480v 3ph.

rkangel 6y ago

It's the new version of the old 'the fastest data rate is a truck full of harddrives'. Now we can say 'for transferring energy, you can't beat a petrol pump pouring fuel'

dredmorbius 6y ago
MOX fuel pellets do slightly better. Tritium-lithium may, some day. But yes, hydrocarbon chains are damned energy dense for chemical reactions.
throwaway0a5e 6y ago
>for transferring energy, you can't beat a petrol pump pouring fuel Pretty much any time fissionable material is moved probably beats it.

ben_w 6y ago

> The power you buy in a few gallons of diesel fuel is simply staggering. 1 Liter per second ~= 38.6 megawatts, for diesel. I’ve never bothered paying attention to the flow rate in a fuel station, but it’s really fortunate that electric cars are fundamentally more efficient than combustion engines.

Symbiote 6y ago
For comparison, a high speed train is around 10MW according to a quick search.
myself248 6y ago
Quoth Wikipedia: > Image result for gas station pump flow rate Light passenger vehicle pump up to about 50 litres (13 US gallons) per minute (the United States limits this to 10 US gallons (38 litres) per minute); pumps serving trucks and other large vehicles have a higher flow rate, up to 130 litres (34 US gallons) per minute in the UK. and 40 US gallons (150 litres) in the US. So roughly 80 megawatts coming out of that diesel nozzle. Most impressive! I've heard of CCS chargers in development that'll push 350kW (920V, 500A), which involves crazy stuff like liquid-cooled connectors. They flow 3M Novec through the cable.: https://ittcannon.com/core/medialibrary/ittcannon/website/literature/catalogs-brochures/itt-cannon-evc-dc-liquid-cooled-brochure.pdf https://ittcannon.com/core/medialibrary/ittcannon/website/li...
throwaway0a5e 6y ago
Assuming 1/3 efficiency (because ICE) a gasoline pump (34ga/min) has a power output of a little over 8000hp or 6mw which comes out to around 4000amps assuming normal 480v 3ph.