[mysterydip]

Impressive if it works, but I wonder if there's an electricity grid that could support it?

Quick napkin math:

- The Hyundai Ioniq 6 gets 4.2mi/kWh (6.76km/kWh) [0]

- 3000km/6.76 = 443kWh

- 443 kWh in 5 mins = throughput of 2200 kWh, times however many charging stations at a refill stop. As EVs get more prevalent every charger at a station could be in use at the same time.

0 - https://insideevs.com/news/709706/electric-cars-energy-consu...

[bryanlarsen]

The demand for energy isn't changing. If you're charging 5 times as much, but only charging 1/5th as often, you aren't taking more from the grid, you're just making demand on the grid more inconsistent.

There are two main ways of handling that randomness.

1. Spread it over a large number of vehicles, and let statistics average out the demand spikes. We're doing this at a significant rate, adding > 1 million EV's to American roads every year. Also, we already have superchargers with 98 stalls. There's going to be little demand difference between 98 350kW chargers vs 32 1MW chargers. 9 350kW vs 3 1MW chargers loads a grid harder, but 98 vs 32 not so much.

2. Batteries. Charging stations are already large enough that many are utilizing batteries to smooth electricity demands.

[7e]

Superchargers with 98 stalls, today, absolutely cannot handle peak charging of all those stalls at the same time. That’s the equivalent of 34,000 homes turning on at the same time, which is basically a medium size city.

[bryanlarsen]

Cannot handle it, and doesn't have to handle it. A Tesla will only pull the full 350kW for 2 minutes in a charging session, and sessions average ~20 minutes. And even when the station is full, there are always stations pulling 0W because they're switching between vehicles et cetera.

But if it did need to handle that level of instantaneous load, it would be straight forward to supply. 98 Tesla's worth of batteries on site could do it. The grid tie is substantially smaller, because the grid tie only has to handle average load, not instantaneous load.

[klinch]

> throughput of 2200 kWh

the physical dimension you're looking for is power (kW)

443 kWh / 5 minutes = 443 kWh * (1/12 h) = 5316kW

[mysterydip]

ah thanks! not sure how I messed that up, but appreciate the correction!

[aitchnyu]

Those numbers. The hydro power plant I visited can charge 34 cars and India has built most of its possible dams.

[yourusername]

The 5 minute charge would be great but as long as i can get the 3000 km range that makes the recharge time a non issue. Planning trips around charging a car every few hundred kilometers is a hassle, but planning around a monthly recharge even if it takes a few hours is no problem.

[IAmBroom]

Can't tell if /s, but if not: that would be a hella short time to fill up a gas tank.

[yourusername]

I meant that if i can get the 3000 km i don't particularly care if it takes 5 minutes or 4 hours to charge the car.

[aredox]

Capacitors are the exact technology to solve this.

[60Vhipx7b4JL]

No, energy density is way below Lixx chemistry. Not suitable.

[aredox]

You don't get it, the idea is to but a (super)capacitor bank at the charging station, just between the power network and the electric car. You discharge them fast into the battery and you modulate how fast you recharge them for the next client.

There is already a similar tech for buses in Geneva, Switzerland:

https://www.hitachienergy.com/news-and-events/customer-stori...