4 ms·

Curious how these will work. The charging time must be much longer than gas fill ups take.

by onos 4y ago

clouddrover 4y ago
There are fast DC chargers and slow AC chargers. Slow chargers are cheaper to build out and useful for charging scenarios where the car is left parked for hours (such as parking the car overnight). Fast chargers are more expensive to build but can charge cars 10 to 80% state of charge in 18-20 minutes for the currently fastest charging EVs (e.g. Hyundai Ioniq 5, Kia EV6, Genesis GV60, Porsche Taycan, Audi e-tron GT). 30 minutes 10-80% is typical. Here's a comparison of the charge curves of four EVs: https://www.youtube.com/watch?v=9gxcukAhIAU https://www.youtube.com/watch?v=9gxcukAhIAU Most cars have a high early peak charge rate and then taper. The Audi e-tron 55 is different in that it has a lower peak of about 150 kW but a much flatter curve to 80%. No passenger EV on the road today can make full use of a 350 kW charger for the entirety of its charge curve. But if a future EV with a 100 kWh battery had a flat charge curve from 10 to 80% at 350 kW then it could do 70 kWh in 12 minutes. Trucks and buses with big batteries need faster chargers. They can use 350 kW chargers: https://www.youtube.com/watch?v=9UAttTG03WA https://www.youtube.com/watch?v=9UAttTG03WA But they'll need the Megawatt Charging System chargers to get more into the battery faster: https://www.charin.global/technology/mcs/ https://www.charin.global/technology/mcs/ Nio's cars support both charging and battery swapping. Swapping in 90 kWh in 6 minutes is equivalent to charging 90 kWh at 900 kW: https://www.youtube.com/watch?v=VmWL1hZQmD0 https://www.youtube.com/watch?v=VmWL1hZQmD0 Nio will implement a 150 kWh battery pack for their cars. If that battery is charged to 90% (135 kWh) then swapping that in 6 minutes would be equivalent to charging the car at 1.35 megawatts.

4 ms·

Curious how these will work. The charging time must be much longer than gas fill ups take.

by onos 4y ago

Curious how these will work. The charging time must be much longer than gas fill ups take.

clouddrover 4y ago
There are fast DC chargers and slow AC chargers. Slow chargers are cheaper to build out and useful for charging scenarios where the car is left parked for hours (such as parking the car overnight). Fast chargers are more expensive to build but can charge cars 10 to 80% state of charge in 18-20 minutes for the currently fastest charging EVs (e.g. Hyundai Ioniq 5, Kia EV6, Genesis GV60, Porsche Taycan, Audi e-tron GT). 30 minutes 10-80% is typical. Here's a comparison of the charge curves of four EVs: https://www.youtube.com/watch?v=9gxcukAhIAU https://www.youtube.com/watch?v=9gxcukAhIAU Most cars have a high early peak charge rate and then taper. The Audi e-tron 55 is different in that it has a lower peak of about 150 kW but a much flatter curve to 80%. No passenger EV on the road today can make full use of a 350 kW charger for the entirety of its charge curve. But if a future EV with a 100 kWh battery had a flat charge curve from 10 to 80% at 350 kW then it could do 70 kWh in 12 minutes. Trucks and buses with big batteries need faster chargers. They can use 350 kW chargers: https://www.youtube.com/watch?v=9UAttTG03WA https://www.youtube.com/watch?v=9UAttTG03WA But they'll need the Megawatt Charging System chargers to get more into the battery faster: https://www.charin.global/technology/mcs/ https://www.charin.global/technology/mcs/ Nio's cars support both charging and battery swapping. Swapping in 90 kWh in 6 minutes is equivalent to charging 90 kWh at 900 kW: https://www.youtube.com/watch?v=VmWL1hZQmD0 https://www.youtube.com/watch?v=VmWL1hZQmD0 Nio will implement a 150 kWh battery pack for their cars. If that battery is charged to 90% (135 kWh) then swapping that in 6 minutes would be equivalent to charging the car at 1.35 megawatts.