Look im a uneducated guy so I might use the wrong terms. I suspect these work like usb cables and you negotiate a rate of charge between the charger and car (that requires some energy but not enough to hurt anyone) and then the device internally flips a switch to enable charging.
If it was just live all the time I don't see how you bill anyone, they could just plug in, that also seems unsafe if say the cable is damaged or something.
Then why have all these different systems and standards if it's just 240 AC (or something) down a regular wire? Just use one of these[0] and call it a day.
Level 2 chargers stop at 7kW for single phase and 22kW for 3 phase. That’s fine for home or destination charging but woefully inadequate for long trips.
Beyond that you need to switch to DC chargers that go directly into the battery pack. This is where it starts to get complicated as different battery architectures need different voltages and max currents.
Incorrect, at least for the US, might be different in different areas. 7kW is very common but not the limit for single-phase. J1772 can handle up to 80A/240V which would be 19.2kW of power. A Tesla Model S has a 17kW charger, so it can pull up to ~70A of power on single-phase 240V. A Mach E has an 11kW charger. A Hyundai Ioniq 5 has a 10.2kW charger on board.
This doesn't change the fact this charging speed for Level 2 charging is inadequate for long road trips. Just wanting to share that level 2 charging on a single phase can be higher than 7kW.
Comments
Look im a uneducated guy so I might use the wrong terms. I suspect these work like usb cables and you negotiate a rate of charge between the charger and car (that requires some energy but not enough to hurt anyone) and then the device internally flips a switch to enable charging.
If it was just live all the time I don't see how you bill anyone, they could just plug in, that also seems unsafe if say the cable is damaged or something.
They are probably (hopefully) smarter than my house, but!
The power to my home is live all the time, so there is voltage.
The current draw is measured to charge me money.
There can be no current until I short it with a blade, then it serves me 15A until the breaker pops.
Then why have all these different systems and standards if it's just 240 AC (or something) down a regular wire? Just use one of these[0] and call it a day.
[0]https://i0.wp.com/makezine.com/wp-content/uploads/2016/10/Fi...
Level 2 chargers stop at 7kW for single phase and 22kW for 3 phase. That’s fine for home or destination charging but woefully inadequate for long trips.
Beyond that you need to switch to DC chargers that go directly into the battery pack. This is where it starts to get complicated as different battery architectures need different voltages and max currents.
Incorrect, at least for the US, might be different in different areas. 7kW is very common but not the limit for single-phase. J1772 can handle up to 80A/240V which would be 19.2kW of power. A Tesla Model S has a 17kW charger, so it can pull up to ~70A of power on single-phase 240V. A Mach E has an 11kW charger. A Hyundai Ioniq 5 has a 10.2kW charger on board.
This doesn't change the fact this charging speed for Level 2 charging is inadequate for long road trips. Just wanting to share that level 2 charging on a single phase can be higher than 7kW.
https://xkcd.com/927/